2011-10-26 04:26:31 +02:00
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/*
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2014-09-16 04:37:25 +02:00
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* Copyright (c) 2007-2014 Nicira, Inc.
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2011-10-26 04:26:31 +02:00
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of version 2 of the GNU General Public
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* License as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA
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*/
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#include <linux/uaccess.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/if_ether.h>
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#include <linux/if_vlan.h>
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#include <net/llc_pdu.h>
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#include <linux/kernel.h>
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#include <linux/jhash.h>
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#include <linux/jiffies.h>
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#include <linux/llc.h>
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#include <linux/module.h>
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#include <linux/in.h>
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#include <linux/rcupdate.h>
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2016-09-16 00:11:53 +02:00
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#include <linux/cpumask.h>
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2011-10-26 04:26:31 +02:00
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#include <linux/if_arp.h>
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#include <linux/ip.h>
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#include <linux/ipv6.h>
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2014-10-06 14:05:13 +02:00
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#include <linux/mpls.h>
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2013-08-22 21:30:48 +02:00
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#include <linux/sctp.h>
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2013-10-30 01:22:21 +01:00
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#include <linux/smp.h>
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2011-10-26 04:26:31 +02:00
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#include <linux/tcp.h>
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#include <linux/udp.h>
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#include <linux/icmp.h>
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#include <linux/icmpv6.h>
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#include <linux/rculist.h>
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#include <net/ip.h>
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2013-06-18 02:50:18 +02:00
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#include <net/ip_tunnels.h>
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2011-10-26 04:26:31 +02:00
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#include <net/ipv6.h>
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2014-10-06 14:05:13 +02:00
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#include <net/mpls.h>
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2011-10-26 04:26:31 +02:00
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#include <net/ndisc.h>
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2015-08-30 02:44:08 +02:00
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#include "conntrack.h"
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2014-09-16 04:20:31 +02:00
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#include "datapath.h"
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#include "flow.h"
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#include "flow_netlink.h"
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2015-08-30 02:44:08 +02:00
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#include "vport.h"
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2014-09-16 04:20:31 +02:00
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2013-10-04 03:16:47 +02:00
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u64 ovs_flow_used_time(unsigned long flow_jiffies)
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2013-08-08 05:01:00 +02:00
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{
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2013-10-04 03:16:47 +02:00
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struct timespec cur_ts;
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u64 cur_ms, idle_ms;
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2013-08-08 05:01:00 +02:00
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2013-10-04 03:16:47 +02:00
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ktime_get_ts(&cur_ts);
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idle_ms = jiffies_to_msecs(jiffies - flow_jiffies);
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cur_ms = (u64)cur_ts.tv_sec * MSEC_PER_SEC +
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cur_ts.tv_nsec / NSEC_PER_MSEC;
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2013-08-08 05:01:00 +02:00
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2013-10-04 03:16:47 +02:00
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return cur_ms - idle_ms;
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2013-08-27 22:02:21 +02:00
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}
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2013-10-23 10:40:44 +02:00
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#define TCP_FLAGS_BE16(tp) (*(__be16 *)&tcp_flag_word(tp) & htons(0x0FFF))
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2013-08-08 05:01:00 +02:00
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2014-05-07 01:48:38 +02:00
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void ovs_flow_stats_update(struct sw_flow *flow, __be16 tcp_flags,
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2014-11-06 15:58:52 +01:00
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const struct sk_buff *skb)
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2013-08-08 05:01:00 +02:00
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{
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2013-10-30 01:22:21 +01:00
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struct flow_stats *stats;
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openvswitch: Per NUMA node flow stats.
Keep kernel flow stats for each NUMA node rather than each (logical)
CPU. This avoids using the per-CPU allocator and removes most of the
kernel-side OVS locking overhead otherwise on the top of perf reports
and allows OVS to scale better with higher number of threads.
With 9 handlers and 4 revalidators netperf TCP_CRR test flow setup
rate doubles on a server with two hyper-threaded physical CPUs (16
logical cores each) compared to the current OVS master. Tested with
non-trivial flow table with a TCP port match rule forcing all new
connections with unique port numbers to OVS userspace. The IP
addresses are still wildcarded, so the kernel flows are not considered
as exact match 5-tuple flows. This type of flows can be expected to
appear in large numbers as the result of more effective wildcarding
made possible by improvements in OVS userspace flow classifier.
Perf results for this test (master):
Events: 305K cycles
+ 8.43% ovs-vswitchd [kernel.kallsyms] [k] mutex_spin_on_owner
+ 5.64% ovs-vswitchd [kernel.kallsyms] [k] __ticket_spin_lock
+ 4.75% ovs-vswitchd ovs-vswitchd [.] find_match_wc
+ 3.32% ovs-vswitchd libpthread-2.15.so [.] pthread_mutex_lock
+ 2.61% ovs-vswitchd [kernel.kallsyms] [k] pcpu_alloc_area
+ 2.19% ovs-vswitchd ovs-vswitchd [.] flow_hash_in_minimask_range
+ 2.03% swapper [kernel.kallsyms] [k] intel_idle
+ 1.84% ovs-vswitchd libpthread-2.15.so [.] pthread_mutex_unlock
+ 1.64% ovs-vswitchd ovs-vswitchd [.] classifier_lookup
+ 1.58% ovs-vswitchd libc-2.15.so [.] 0x7f4e6
+ 1.07% ovs-vswitchd [kernel.kallsyms] [k] memset
+ 1.03% netperf [kernel.kallsyms] [k] __ticket_spin_lock
+ 0.92% swapper [kernel.kallsyms] [k] __ticket_spin_lock
...
And after this patch:
Events: 356K cycles
+ 6.85% ovs-vswitchd ovs-vswitchd [.] find_match_wc
+ 4.63% ovs-vswitchd libpthread-2.15.so [.] pthread_mutex_lock
+ 3.06% ovs-vswitchd [kernel.kallsyms] [k] __ticket_spin_lock
+ 2.81% ovs-vswitchd ovs-vswitchd [.] flow_hash_in_minimask_range
+ 2.51% ovs-vswitchd libpthread-2.15.so [.] pthread_mutex_unlock
+ 2.27% ovs-vswitchd ovs-vswitchd [.] classifier_lookup
+ 1.84% ovs-vswitchd libc-2.15.so [.] 0x15d30f
+ 1.74% ovs-vswitchd [kernel.kallsyms] [k] mutex_spin_on_owner
+ 1.47% swapper [kernel.kallsyms] [k] intel_idle
+ 1.34% ovs-vswitchd ovs-vswitchd [.] flow_hash_in_minimask
+ 1.33% ovs-vswitchd ovs-vswitchd [.] rule_actions_unref
+ 1.16% ovs-vswitchd ovs-vswitchd [.] hindex_node_with_hash
+ 1.16% ovs-vswitchd ovs-vswitchd [.] do_xlate_actions
+ 1.09% ovs-vswitchd ovs-vswitchd [.] ofproto_rule_ref
+ 1.01% netperf [kernel.kallsyms] [k] __ticket_spin_lock
...
There is a small increase in kernel spinlock overhead due to the same
spinlock being shared between multiple cores of the same physical CPU,
but that is barely visible in the netperf TCP_CRR test performance
(maybe ~1% performance drop, hard to tell exactly due to variance in
the test results), when testing for kernel module throughput (with no
userspace activity, handful of kernel flows).
On flow setup, a single stats instance is allocated (for the NUMA node
0). As CPUs from multiple NUMA nodes start updating stats, new
NUMA-node specific stats instances are allocated. This allocation on
the packet processing code path is made to never block or look for
emergency memory pools, minimizing the allocation latency. If the
allocation fails, the existing preallocated stats instance is used.
Also, if only CPUs from one NUMA-node are updating the preallocated
stats instance, no additional stats instances are allocated. This
eliminates the need to pre-allocate stats instances that will not be
used, also relieving the stats reader from the burden of reading stats
that are never used.
Signed-off-by: Jarno Rajahalme <jrajahalme@nicira.com>
Acked-by: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: Jesse Gross <jesse@nicira.com>
2014-03-27 20:42:54 +01:00
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int node = numa_node_id();
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2016-09-16 00:11:53 +02:00
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int cpu = smp_processor_id();
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2015-01-13 17:13:44 +01:00
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int len = skb->len + (skb_vlan_tag_present(skb) ? VLAN_HLEN : 0);
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2013-08-08 05:01:00 +02:00
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2016-09-16 00:11:53 +02:00
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stats = rcu_dereference(flow->stats[cpu]);
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2013-10-30 01:22:21 +01:00
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2016-09-16 00:11:53 +02:00
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/* Check if already have CPU-specific stats. */
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openvswitch: Per NUMA node flow stats.
Keep kernel flow stats for each NUMA node rather than each (logical)
CPU. This avoids using the per-CPU allocator and removes most of the
kernel-side OVS locking overhead otherwise on the top of perf reports
and allows OVS to scale better with higher number of threads.
With 9 handlers and 4 revalidators netperf TCP_CRR test flow setup
rate doubles on a server with two hyper-threaded physical CPUs (16
logical cores each) compared to the current OVS master. Tested with
non-trivial flow table with a TCP port match rule forcing all new
connections with unique port numbers to OVS userspace. The IP
addresses are still wildcarded, so the kernel flows are not considered
as exact match 5-tuple flows. This type of flows can be expected to
appear in large numbers as the result of more effective wildcarding
made possible by improvements in OVS userspace flow classifier.
Perf results for this test (master):
Events: 305K cycles
+ 8.43% ovs-vswitchd [kernel.kallsyms] [k] mutex_spin_on_owner
+ 5.64% ovs-vswitchd [kernel.kallsyms] [k] __ticket_spin_lock
+ 4.75% ovs-vswitchd ovs-vswitchd [.] find_match_wc
+ 3.32% ovs-vswitchd libpthread-2.15.so [.] pthread_mutex_lock
+ 2.61% ovs-vswitchd [kernel.kallsyms] [k] pcpu_alloc_area
+ 2.19% ovs-vswitchd ovs-vswitchd [.] flow_hash_in_minimask_range
+ 2.03% swapper [kernel.kallsyms] [k] intel_idle
+ 1.84% ovs-vswitchd libpthread-2.15.so [.] pthread_mutex_unlock
+ 1.64% ovs-vswitchd ovs-vswitchd [.] classifier_lookup
+ 1.58% ovs-vswitchd libc-2.15.so [.] 0x7f4e6
+ 1.07% ovs-vswitchd [kernel.kallsyms] [k] memset
+ 1.03% netperf [kernel.kallsyms] [k] __ticket_spin_lock
+ 0.92% swapper [kernel.kallsyms] [k] __ticket_spin_lock
...
And after this patch:
Events: 356K cycles
+ 6.85% ovs-vswitchd ovs-vswitchd [.] find_match_wc
+ 4.63% ovs-vswitchd libpthread-2.15.so [.] pthread_mutex_lock
+ 3.06% ovs-vswitchd [kernel.kallsyms] [k] __ticket_spin_lock
+ 2.81% ovs-vswitchd ovs-vswitchd [.] flow_hash_in_minimask_range
+ 2.51% ovs-vswitchd libpthread-2.15.so [.] pthread_mutex_unlock
+ 2.27% ovs-vswitchd ovs-vswitchd [.] classifier_lookup
+ 1.84% ovs-vswitchd libc-2.15.so [.] 0x15d30f
+ 1.74% ovs-vswitchd [kernel.kallsyms] [k] mutex_spin_on_owner
+ 1.47% swapper [kernel.kallsyms] [k] intel_idle
+ 1.34% ovs-vswitchd ovs-vswitchd [.] flow_hash_in_minimask
+ 1.33% ovs-vswitchd ovs-vswitchd [.] rule_actions_unref
+ 1.16% ovs-vswitchd ovs-vswitchd [.] hindex_node_with_hash
+ 1.16% ovs-vswitchd ovs-vswitchd [.] do_xlate_actions
+ 1.09% ovs-vswitchd ovs-vswitchd [.] ofproto_rule_ref
+ 1.01% netperf [kernel.kallsyms] [k] __ticket_spin_lock
...
There is a small increase in kernel spinlock overhead due to the same
spinlock being shared between multiple cores of the same physical CPU,
but that is barely visible in the netperf TCP_CRR test performance
(maybe ~1% performance drop, hard to tell exactly due to variance in
the test results), when testing for kernel module throughput (with no
userspace activity, handful of kernel flows).
On flow setup, a single stats instance is allocated (for the NUMA node
0). As CPUs from multiple NUMA nodes start updating stats, new
NUMA-node specific stats instances are allocated. This allocation on
the packet processing code path is made to never block or look for
emergency memory pools, minimizing the allocation latency. If the
allocation fails, the existing preallocated stats instance is used.
Also, if only CPUs from one NUMA-node are updating the preallocated
stats instance, no additional stats instances are allocated. This
eliminates the need to pre-allocate stats instances that will not be
used, also relieving the stats reader from the burden of reading stats
that are never used.
Signed-off-by: Jarno Rajahalme <jrajahalme@nicira.com>
Acked-by: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: Jesse Gross <jesse@nicira.com>
2014-03-27 20:42:54 +01:00
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if (likely(stats)) {
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spin_lock(&stats->lock);
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/* Mark if we write on the pre-allocated stats. */
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2016-09-16 00:11:53 +02:00
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if (cpu == 0 && unlikely(flow->stats_last_writer != cpu))
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flow->stats_last_writer = cpu;
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openvswitch: Per NUMA node flow stats.
Keep kernel flow stats for each NUMA node rather than each (logical)
CPU. This avoids using the per-CPU allocator and removes most of the
kernel-side OVS locking overhead otherwise on the top of perf reports
and allows OVS to scale better with higher number of threads.
With 9 handlers and 4 revalidators netperf TCP_CRR test flow setup
rate doubles on a server with two hyper-threaded physical CPUs (16
logical cores each) compared to the current OVS master. Tested with
non-trivial flow table with a TCP port match rule forcing all new
connections with unique port numbers to OVS userspace. The IP
addresses are still wildcarded, so the kernel flows are not considered
as exact match 5-tuple flows. This type of flows can be expected to
appear in large numbers as the result of more effective wildcarding
made possible by improvements in OVS userspace flow classifier.
Perf results for this test (master):
Events: 305K cycles
+ 8.43% ovs-vswitchd [kernel.kallsyms] [k] mutex_spin_on_owner
+ 5.64% ovs-vswitchd [kernel.kallsyms] [k] __ticket_spin_lock
+ 4.75% ovs-vswitchd ovs-vswitchd [.] find_match_wc
+ 3.32% ovs-vswitchd libpthread-2.15.so [.] pthread_mutex_lock
+ 2.61% ovs-vswitchd [kernel.kallsyms] [k] pcpu_alloc_area
+ 2.19% ovs-vswitchd ovs-vswitchd [.] flow_hash_in_minimask_range
+ 2.03% swapper [kernel.kallsyms] [k] intel_idle
+ 1.84% ovs-vswitchd libpthread-2.15.so [.] pthread_mutex_unlock
+ 1.64% ovs-vswitchd ovs-vswitchd [.] classifier_lookup
+ 1.58% ovs-vswitchd libc-2.15.so [.] 0x7f4e6
+ 1.07% ovs-vswitchd [kernel.kallsyms] [k] memset
+ 1.03% netperf [kernel.kallsyms] [k] __ticket_spin_lock
+ 0.92% swapper [kernel.kallsyms] [k] __ticket_spin_lock
...
And after this patch:
Events: 356K cycles
+ 6.85% ovs-vswitchd ovs-vswitchd [.] find_match_wc
+ 4.63% ovs-vswitchd libpthread-2.15.so [.] pthread_mutex_lock
+ 3.06% ovs-vswitchd [kernel.kallsyms] [k] __ticket_spin_lock
+ 2.81% ovs-vswitchd ovs-vswitchd [.] flow_hash_in_minimask_range
+ 2.51% ovs-vswitchd libpthread-2.15.so [.] pthread_mutex_unlock
+ 2.27% ovs-vswitchd ovs-vswitchd [.] classifier_lookup
+ 1.84% ovs-vswitchd libc-2.15.so [.] 0x15d30f
+ 1.74% ovs-vswitchd [kernel.kallsyms] [k] mutex_spin_on_owner
+ 1.47% swapper [kernel.kallsyms] [k] intel_idle
+ 1.34% ovs-vswitchd ovs-vswitchd [.] flow_hash_in_minimask
+ 1.33% ovs-vswitchd ovs-vswitchd [.] rule_actions_unref
+ 1.16% ovs-vswitchd ovs-vswitchd [.] hindex_node_with_hash
+ 1.16% ovs-vswitchd ovs-vswitchd [.] do_xlate_actions
+ 1.09% ovs-vswitchd ovs-vswitchd [.] ofproto_rule_ref
+ 1.01% netperf [kernel.kallsyms] [k] __ticket_spin_lock
...
There is a small increase in kernel spinlock overhead due to the same
spinlock being shared between multiple cores of the same physical CPU,
but that is barely visible in the netperf TCP_CRR test performance
(maybe ~1% performance drop, hard to tell exactly due to variance in
the test results), when testing for kernel module throughput (with no
userspace activity, handful of kernel flows).
On flow setup, a single stats instance is allocated (for the NUMA node
0). As CPUs from multiple NUMA nodes start updating stats, new
NUMA-node specific stats instances are allocated. This allocation on
the packet processing code path is made to never block or look for
emergency memory pools, minimizing the allocation latency. If the
allocation fails, the existing preallocated stats instance is used.
Also, if only CPUs from one NUMA-node are updating the preallocated
stats instance, no additional stats instances are allocated. This
eliminates the need to pre-allocate stats instances that will not be
used, also relieving the stats reader from the burden of reading stats
that are never used.
Signed-off-by: Jarno Rajahalme <jrajahalme@nicira.com>
Acked-by: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: Jesse Gross <jesse@nicira.com>
2014-03-27 20:42:54 +01:00
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} else {
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stats = rcu_dereference(flow->stats[0]); /* Pre-allocated. */
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spin_lock(&stats->lock);
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2016-09-16 00:11:53 +02:00
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/* If the current CPU is the only writer on the
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openvswitch: Per NUMA node flow stats.
Keep kernel flow stats for each NUMA node rather than each (logical)
CPU. This avoids using the per-CPU allocator and removes most of the
kernel-side OVS locking overhead otherwise on the top of perf reports
and allows OVS to scale better with higher number of threads.
With 9 handlers and 4 revalidators netperf TCP_CRR test flow setup
rate doubles on a server with two hyper-threaded physical CPUs (16
logical cores each) compared to the current OVS master. Tested with
non-trivial flow table with a TCP port match rule forcing all new
connections with unique port numbers to OVS userspace. The IP
addresses are still wildcarded, so the kernel flows are not considered
as exact match 5-tuple flows. This type of flows can be expected to
appear in large numbers as the result of more effective wildcarding
made possible by improvements in OVS userspace flow classifier.
Perf results for this test (master):
Events: 305K cycles
+ 8.43% ovs-vswitchd [kernel.kallsyms] [k] mutex_spin_on_owner
+ 5.64% ovs-vswitchd [kernel.kallsyms] [k] __ticket_spin_lock
+ 4.75% ovs-vswitchd ovs-vswitchd [.] find_match_wc
+ 3.32% ovs-vswitchd libpthread-2.15.so [.] pthread_mutex_lock
+ 2.61% ovs-vswitchd [kernel.kallsyms] [k] pcpu_alloc_area
+ 2.19% ovs-vswitchd ovs-vswitchd [.] flow_hash_in_minimask_range
+ 2.03% swapper [kernel.kallsyms] [k] intel_idle
+ 1.84% ovs-vswitchd libpthread-2.15.so [.] pthread_mutex_unlock
+ 1.64% ovs-vswitchd ovs-vswitchd [.] classifier_lookup
+ 1.58% ovs-vswitchd libc-2.15.so [.] 0x7f4e6
+ 1.07% ovs-vswitchd [kernel.kallsyms] [k] memset
+ 1.03% netperf [kernel.kallsyms] [k] __ticket_spin_lock
+ 0.92% swapper [kernel.kallsyms] [k] __ticket_spin_lock
...
And after this patch:
Events: 356K cycles
+ 6.85% ovs-vswitchd ovs-vswitchd [.] find_match_wc
+ 4.63% ovs-vswitchd libpthread-2.15.so [.] pthread_mutex_lock
+ 3.06% ovs-vswitchd [kernel.kallsyms] [k] __ticket_spin_lock
+ 2.81% ovs-vswitchd ovs-vswitchd [.] flow_hash_in_minimask_range
+ 2.51% ovs-vswitchd libpthread-2.15.so [.] pthread_mutex_unlock
+ 2.27% ovs-vswitchd ovs-vswitchd [.] classifier_lookup
+ 1.84% ovs-vswitchd libc-2.15.so [.] 0x15d30f
+ 1.74% ovs-vswitchd [kernel.kallsyms] [k] mutex_spin_on_owner
+ 1.47% swapper [kernel.kallsyms] [k] intel_idle
+ 1.34% ovs-vswitchd ovs-vswitchd [.] flow_hash_in_minimask
+ 1.33% ovs-vswitchd ovs-vswitchd [.] rule_actions_unref
+ 1.16% ovs-vswitchd ovs-vswitchd [.] hindex_node_with_hash
+ 1.16% ovs-vswitchd ovs-vswitchd [.] do_xlate_actions
+ 1.09% ovs-vswitchd ovs-vswitchd [.] ofproto_rule_ref
+ 1.01% netperf [kernel.kallsyms] [k] __ticket_spin_lock
...
There is a small increase in kernel spinlock overhead due to the same
spinlock being shared between multiple cores of the same physical CPU,
but that is barely visible in the netperf TCP_CRR test performance
(maybe ~1% performance drop, hard to tell exactly due to variance in
the test results), when testing for kernel module throughput (with no
userspace activity, handful of kernel flows).
On flow setup, a single stats instance is allocated (for the NUMA node
0). As CPUs from multiple NUMA nodes start updating stats, new
NUMA-node specific stats instances are allocated. This allocation on
the packet processing code path is made to never block or look for
emergency memory pools, minimizing the allocation latency. If the
allocation fails, the existing preallocated stats instance is used.
Also, if only CPUs from one NUMA-node are updating the preallocated
stats instance, no additional stats instances are allocated. This
eliminates the need to pre-allocate stats instances that will not be
used, also relieving the stats reader from the burden of reading stats
that are never used.
Signed-off-by: Jarno Rajahalme <jrajahalme@nicira.com>
Acked-by: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: Jesse Gross <jesse@nicira.com>
2014-03-27 20:42:54 +01:00
|
|
|
* pre-allocated stats keep using them.
|
|
|
|
*/
|
2016-09-16 00:11:53 +02:00
|
|
|
if (unlikely(flow->stats_last_writer != cpu)) {
|
openvswitch: Per NUMA node flow stats.
Keep kernel flow stats for each NUMA node rather than each (logical)
CPU. This avoids using the per-CPU allocator and removes most of the
kernel-side OVS locking overhead otherwise on the top of perf reports
and allows OVS to scale better with higher number of threads.
With 9 handlers and 4 revalidators netperf TCP_CRR test flow setup
rate doubles on a server with two hyper-threaded physical CPUs (16
logical cores each) compared to the current OVS master. Tested with
non-trivial flow table with a TCP port match rule forcing all new
connections with unique port numbers to OVS userspace. The IP
addresses are still wildcarded, so the kernel flows are not considered
as exact match 5-tuple flows. This type of flows can be expected to
appear in large numbers as the result of more effective wildcarding
made possible by improvements in OVS userspace flow classifier.
Perf results for this test (master):
Events: 305K cycles
+ 8.43% ovs-vswitchd [kernel.kallsyms] [k] mutex_spin_on_owner
+ 5.64% ovs-vswitchd [kernel.kallsyms] [k] __ticket_spin_lock
+ 4.75% ovs-vswitchd ovs-vswitchd [.] find_match_wc
+ 3.32% ovs-vswitchd libpthread-2.15.so [.] pthread_mutex_lock
+ 2.61% ovs-vswitchd [kernel.kallsyms] [k] pcpu_alloc_area
+ 2.19% ovs-vswitchd ovs-vswitchd [.] flow_hash_in_minimask_range
+ 2.03% swapper [kernel.kallsyms] [k] intel_idle
+ 1.84% ovs-vswitchd libpthread-2.15.so [.] pthread_mutex_unlock
+ 1.64% ovs-vswitchd ovs-vswitchd [.] classifier_lookup
+ 1.58% ovs-vswitchd libc-2.15.so [.] 0x7f4e6
+ 1.07% ovs-vswitchd [kernel.kallsyms] [k] memset
+ 1.03% netperf [kernel.kallsyms] [k] __ticket_spin_lock
+ 0.92% swapper [kernel.kallsyms] [k] __ticket_spin_lock
...
And after this patch:
Events: 356K cycles
+ 6.85% ovs-vswitchd ovs-vswitchd [.] find_match_wc
+ 4.63% ovs-vswitchd libpthread-2.15.so [.] pthread_mutex_lock
+ 3.06% ovs-vswitchd [kernel.kallsyms] [k] __ticket_spin_lock
+ 2.81% ovs-vswitchd ovs-vswitchd [.] flow_hash_in_minimask_range
+ 2.51% ovs-vswitchd libpthread-2.15.so [.] pthread_mutex_unlock
+ 2.27% ovs-vswitchd ovs-vswitchd [.] classifier_lookup
+ 1.84% ovs-vswitchd libc-2.15.so [.] 0x15d30f
+ 1.74% ovs-vswitchd [kernel.kallsyms] [k] mutex_spin_on_owner
+ 1.47% swapper [kernel.kallsyms] [k] intel_idle
+ 1.34% ovs-vswitchd ovs-vswitchd [.] flow_hash_in_minimask
+ 1.33% ovs-vswitchd ovs-vswitchd [.] rule_actions_unref
+ 1.16% ovs-vswitchd ovs-vswitchd [.] hindex_node_with_hash
+ 1.16% ovs-vswitchd ovs-vswitchd [.] do_xlate_actions
+ 1.09% ovs-vswitchd ovs-vswitchd [.] ofproto_rule_ref
+ 1.01% netperf [kernel.kallsyms] [k] __ticket_spin_lock
...
There is a small increase in kernel spinlock overhead due to the same
spinlock being shared between multiple cores of the same physical CPU,
but that is barely visible in the netperf TCP_CRR test performance
(maybe ~1% performance drop, hard to tell exactly due to variance in
the test results), when testing for kernel module throughput (with no
userspace activity, handful of kernel flows).
On flow setup, a single stats instance is allocated (for the NUMA node
0). As CPUs from multiple NUMA nodes start updating stats, new
NUMA-node specific stats instances are allocated. This allocation on
the packet processing code path is made to never block or look for
emergency memory pools, minimizing the allocation latency. If the
allocation fails, the existing preallocated stats instance is used.
Also, if only CPUs from one NUMA-node are updating the preallocated
stats instance, no additional stats instances are allocated. This
eliminates the need to pre-allocate stats instances that will not be
used, also relieving the stats reader from the burden of reading stats
that are never used.
Signed-off-by: Jarno Rajahalme <jrajahalme@nicira.com>
Acked-by: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: Jesse Gross <jesse@nicira.com>
2014-03-27 20:42:54 +01:00
|
|
|
/* A previous locker may have already allocated the
|
2016-09-16 00:11:53 +02:00
|
|
|
* stats, so we need to check again. If CPU-specific
|
openvswitch: Per NUMA node flow stats.
Keep kernel flow stats for each NUMA node rather than each (logical)
CPU. This avoids using the per-CPU allocator and removes most of the
kernel-side OVS locking overhead otherwise on the top of perf reports
and allows OVS to scale better with higher number of threads.
With 9 handlers and 4 revalidators netperf TCP_CRR test flow setup
rate doubles on a server with two hyper-threaded physical CPUs (16
logical cores each) compared to the current OVS master. Tested with
non-trivial flow table with a TCP port match rule forcing all new
connections with unique port numbers to OVS userspace. The IP
addresses are still wildcarded, so the kernel flows are not considered
as exact match 5-tuple flows. This type of flows can be expected to
appear in large numbers as the result of more effective wildcarding
made possible by improvements in OVS userspace flow classifier.
Perf results for this test (master):
Events: 305K cycles
+ 8.43% ovs-vswitchd [kernel.kallsyms] [k] mutex_spin_on_owner
+ 5.64% ovs-vswitchd [kernel.kallsyms] [k] __ticket_spin_lock
+ 4.75% ovs-vswitchd ovs-vswitchd [.] find_match_wc
+ 3.32% ovs-vswitchd libpthread-2.15.so [.] pthread_mutex_lock
+ 2.61% ovs-vswitchd [kernel.kallsyms] [k] pcpu_alloc_area
+ 2.19% ovs-vswitchd ovs-vswitchd [.] flow_hash_in_minimask_range
+ 2.03% swapper [kernel.kallsyms] [k] intel_idle
+ 1.84% ovs-vswitchd libpthread-2.15.so [.] pthread_mutex_unlock
+ 1.64% ovs-vswitchd ovs-vswitchd [.] classifier_lookup
+ 1.58% ovs-vswitchd libc-2.15.so [.] 0x7f4e6
+ 1.07% ovs-vswitchd [kernel.kallsyms] [k] memset
+ 1.03% netperf [kernel.kallsyms] [k] __ticket_spin_lock
+ 0.92% swapper [kernel.kallsyms] [k] __ticket_spin_lock
...
And after this patch:
Events: 356K cycles
+ 6.85% ovs-vswitchd ovs-vswitchd [.] find_match_wc
+ 4.63% ovs-vswitchd libpthread-2.15.so [.] pthread_mutex_lock
+ 3.06% ovs-vswitchd [kernel.kallsyms] [k] __ticket_spin_lock
+ 2.81% ovs-vswitchd ovs-vswitchd [.] flow_hash_in_minimask_range
+ 2.51% ovs-vswitchd libpthread-2.15.so [.] pthread_mutex_unlock
+ 2.27% ovs-vswitchd ovs-vswitchd [.] classifier_lookup
+ 1.84% ovs-vswitchd libc-2.15.so [.] 0x15d30f
+ 1.74% ovs-vswitchd [kernel.kallsyms] [k] mutex_spin_on_owner
+ 1.47% swapper [kernel.kallsyms] [k] intel_idle
+ 1.34% ovs-vswitchd ovs-vswitchd [.] flow_hash_in_minimask
+ 1.33% ovs-vswitchd ovs-vswitchd [.] rule_actions_unref
+ 1.16% ovs-vswitchd ovs-vswitchd [.] hindex_node_with_hash
+ 1.16% ovs-vswitchd ovs-vswitchd [.] do_xlate_actions
+ 1.09% ovs-vswitchd ovs-vswitchd [.] ofproto_rule_ref
+ 1.01% netperf [kernel.kallsyms] [k] __ticket_spin_lock
...
There is a small increase in kernel spinlock overhead due to the same
spinlock being shared between multiple cores of the same physical CPU,
but that is barely visible in the netperf TCP_CRR test performance
(maybe ~1% performance drop, hard to tell exactly due to variance in
the test results), when testing for kernel module throughput (with no
userspace activity, handful of kernel flows).
On flow setup, a single stats instance is allocated (for the NUMA node
0). As CPUs from multiple NUMA nodes start updating stats, new
NUMA-node specific stats instances are allocated. This allocation on
the packet processing code path is made to never block or look for
emergency memory pools, minimizing the allocation latency. If the
allocation fails, the existing preallocated stats instance is used.
Also, if only CPUs from one NUMA-node are updating the preallocated
stats instance, no additional stats instances are allocated. This
eliminates the need to pre-allocate stats instances that will not be
used, also relieving the stats reader from the burden of reading stats
that are never used.
Signed-off-by: Jarno Rajahalme <jrajahalme@nicira.com>
Acked-by: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: Jesse Gross <jesse@nicira.com>
2014-03-27 20:42:54 +01:00
|
|
|
* stats were already allocated, we update the pre-
|
|
|
|
* allocated stats as we have already locked them.
|
|
|
|
*/
|
2016-09-16 00:11:53 +02:00
|
|
|
if (likely(flow->stats_last_writer != -1) &&
|
|
|
|
likely(!rcu_access_pointer(flow->stats[cpu]))) {
|
|
|
|
/* Try to allocate CPU-specific stats. */
|
openvswitch: Per NUMA node flow stats.
Keep kernel flow stats for each NUMA node rather than each (logical)
CPU. This avoids using the per-CPU allocator and removes most of the
kernel-side OVS locking overhead otherwise on the top of perf reports
and allows OVS to scale better with higher number of threads.
With 9 handlers and 4 revalidators netperf TCP_CRR test flow setup
rate doubles on a server with two hyper-threaded physical CPUs (16
logical cores each) compared to the current OVS master. Tested with
non-trivial flow table with a TCP port match rule forcing all new
connections with unique port numbers to OVS userspace. The IP
addresses are still wildcarded, so the kernel flows are not considered
as exact match 5-tuple flows. This type of flows can be expected to
appear in large numbers as the result of more effective wildcarding
made possible by improvements in OVS userspace flow classifier.
Perf results for this test (master):
Events: 305K cycles
+ 8.43% ovs-vswitchd [kernel.kallsyms] [k] mutex_spin_on_owner
+ 5.64% ovs-vswitchd [kernel.kallsyms] [k] __ticket_spin_lock
+ 4.75% ovs-vswitchd ovs-vswitchd [.] find_match_wc
+ 3.32% ovs-vswitchd libpthread-2.15.so [.] pthread_mutex_lock
+ 2.61% ovs-vswitchd [kernel.kallsyms] [k] pcpu_alloc_area
+ 2.19% ovs-vswitchd ovs-vswitchd [.] flow_hash_in_minimask_range
+ 2.03% swapper [kernel.kallsyms] [k] intel_idle
+ 1.84% ovs-vswitchd libpthread-2.15.so [.] pthread_mutex_unlock
+ 1.64% ovs-vswitchd ovs-vswitchd [.] classifier_lookup
+ 1.58% ovs-vswitchd libc-2.15.so [.] 0x7f4e6
+ 1.07% ovs-vswitchd [kernel.kallsyms] [k] memset
+ 1.03% netperf [kernel.kallsyms] [k] __ticket_spin_lock
+ 0.92% swapper [kernel.kallsyms] [k] __ticket_spin_lock
...
And after this patch:
Events: 356K cycles
+ 6.85% ovs-vswitchd ovs-vswitchd [.] find_match_wc
+ 4.63% ovs-vswitchd libpthread-2.15.so [.] pthread_mutex_lock
+ 3.06% ovs-vswitchd [kernel.kallsyms] [k] __ticket_spin_lock
+ 2.81% ovs-vswitchd ovs-vswitchd [.] flow_hash_in_minimask_range
+ 2.51% ovs-vswitchd libpthread-2.15.so [.] pthread_mutex_unlock
+ 2.27% ovs-vswitchd ovs-vswitchd [.] classifier_lookup
+ 1.84% ovs-vswitchd libc-2.15.so [.] 0x15d30f
+ 1.74% ovs-vswitchd [kernel.kallsyms] [k] mutex_spin_on_owner
+ 1.47% swapper [kernel.kallsyms] [k] intel_idle
+ 1.34% ovs-vswitchd ovs-vswitchd [.] flow_hash_in_minimask
+ 1.33% ovs-vswitchd ovs-vswitchd [.] rule_actions_unref
+ 1.16% ovs-vswitchd ovs-vswitchd [.] hindex_node_with_hash
+ 1.16% ovs-vswitchd ovs-vswitchd [.] do_xlate_actions
+ 1.09% ovs-vswitchd ovs-vswitchd [.] ofproto_rule_ref
+ 1.01% netperf [kernel.kallsyms] [k] __ticket_spin_lock
...
There is a small increase in kernel spinlock overhead due to the same
spinlock being shared between multiple cores of the same physical CPU,
but that is barely visible in the netperf TCP_CRR test performance
(maybe ~1% performance drop, hard to tell exactly due to variance in
the test results), when testing for kernel module throughput (with no
userspace activity, handful of kernel flows).
On flow setup, a single stats instance is allocated (for the NUMA node
0). As CPUs from multiple NUMA nodes start updating stats, new
NUMA-node specific stats instances are allocated. This allocation on
the packet processing code path is made to never block or look for
emergency memory pools, minimizing the allocation latency. If the
allocation fails, the existing preallocated stats instance is used.
Also, if only CPUs from one NUMA-node are updating the preallocated
stats instance, no additional stats instances are allocated. This
eliminates the need to pre-allocate stats instances that will not be
used, also relieving the stats reader from the burden of reading stats
that are never used.
Signed-off-by: Jarno Rajahalme <jrajahalme@nicira.com>
Acked-by: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: Jesse Gross <jesse@nicira.com>
2014-03-27 20:42:54 +01:00
|
|
|
struct flow_stats *new_stats;
|
|
|
|
|
|
|
|
new_stats =
|
|
|
|
kmem_cache_alloc_node(flow_stats_cache,
|
mm: remove GFP_THISNODE
NOTE: this is not about __GFP_THISNODE, this is only about GFP_THISNODE.
GFP_THISNODE is a secret combination of gfp bits that have different
behavior than expected. It is a combination of __GFP_THISNODE,
__GFP_NORETRY, and __GFP_NOWARN and is special-cased in the page
allocator slowpath to fail without trying reclaim even though it may be
used in combination with __GFP_WAIT.
An example of the problem this creates: commit e97ca8e5b864 ("mm: fix
GFP_THISNODE callers and clarify") fixed up many users of GFP_THISNODE
that really just wanted __GFP_THISNODE. The problem doesn't end there,
however, because even it was a no-op for alloc_misplaced_dst_page(),
which also sets __GFP_NORETRY and __GFP_NOWARN, and
migrate_misplaced_transhuge_page(), where __GFP_NORETRY and __GFP_NOWAIT
is set in GFP_TRANSHUGE. Converting GFP_THISNODE to __GFP_THISNODE is a
no-op in these cases since the page allocator special-cases
__GFP_THISNODE && __GFP_NORETRY && __GFP_NOWARN.
It's time to just remove GFP_THISNODE entirely. We leave __GFP_THISNODE
to restrict an allocation to a local node, but remove GFP_THISNODE and
its obscurity. Instead, we require that a caller clear __GFP_WAIT if it
wants to avoid reclaim.
This allows the aforementioned functions to actually reclaim as they
should. It also enables any future callers that want to do
__GFP_THISNODE but also __GFP_NORETRY && __GFP_NOWARN to reclaim. The
rule is simple: if you don't want to reclaim, then don't set __GFP_WAIT.
Aside: ovs_flow_stats_update() really wants to avoid reclaim as well, so
it is unchanged.
Signed-off-by: David Rientjes <rientjes@google.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Christoph Lameter <cl@linux.com>
Acked-by: Pekka Enberg <penberg@kernel.org>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Pravin Shelar <pshelar@nicira.com>
Cc: Jarno Rajahalme <jrajahalme@nicira.com>
Cc: Li Zefan <lizefan@huawei.com>
Cc: Greg Thelen <gthelen@google.com>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-04-15 00:46:55 +02:00
|
|
|
GFP_NOWAIT |
|
|
|
|
__GFP_THISNODE |
|
|
|
|
__GFP_NOWARN |
|
openvswitch: Per NUMA node flow stats.
Keep kernel flow stats for each NUMA node rather than each (logical)
CPU. This avoids using the per-CPU allocator and removes most of the
kernel-side OVS locking overhead otherwise on the top of perf reports
and allows OVS to scale better with higher number of threads.
With 9 handlers and 4 revalidators netperf TCP_CRR test flow setup
rate doubles on a server with two hyper-threaded physical CPUs (16
logical cores each) compared to the current OVS master. Tested with
non-trivial flow table with a TCP port match rule forcing all new
connections with unique port numbers to OVS userspace. The IP
addresses are still wildcarded, so the kernel flows are not considered
as exact match 5-tuple flows. This type of flows can be expected to
appear in large numbers as the result of more effective wildcarding
made possible by improvements in OVS userspace flow classifier.
Perf results for this test (master):
Events: 305K cycles
+ 8.43% ovs-vswitchd [kernel.kallsyms] [k] mutex_spin_on_owner
+ 5.64% ovs-vswitchd [kernel.kallsyms] [k] __ticket_spin_lock
+ 4.75% ovs-vswitchd ovs-vswitchd [.] find_match_wc
+ 3.32% ovs-vswitchd libpthread-2.15.so [.] pthread_mutex_lock
+ 2.61% ovs-vswitchd [kernel.kallsyms] [k] pcpu_alloc_area
+ 2.19% ovs-vswitchd ovs-vswitchd [.] flow_hash_in_minimask_range
+ 2.03% swapper [kernel.kallsyms] [k] intel_idle
+ 1.84% ovs-vswitchd libpthread-2.15.so [.] pthread_mutex_unlock
+ 1.64% ovs-vswitchd ovs-vswitchd [.] classifier_lookup
+ 1.58% ovs-vswitchd libc-2.15.so [.] 0x7f4e6
+ 1.07% ovs-vswitchd [kernel.kallsyms] [k] memset
+ 1.03% netperf [kernel.kallsyms] [k] __ticket_spin_lock
+ 0.92% swapper [kernel.kallsyms] [k] __ticket_spin_lock
...
And after this patch:
Events: 356K cycles
+ 6.85% ovs-vswitchd ovs-vswitchd [.] find_match_wc
+ 4.63% ovs-vswitchd libpthread-2.15.so [.] pthread_mutex_lock
+ 3.06% ovs-vswitchd [kernel.kallsyms] [k] __ticket_spin_lock
+ 2.81% ovs-vswitchd ovs-vswitchd [.] flow_hash_in_minimask_range
+ 2.51% ovs-vswitchd libpthread-2.15.so [.] pthread_mutex_unlock
+ 2.27% ovs-vswitchd ovs-vswitchd [.] classifier_lookup
+ 1.84% ovs-vswitchd libc-2.15.so [.] 0x15d30f
+ 1.74% ovs-vswitchd [kernel.kallsyms] [k] mutex_spin_on_owner
+ 1.47% swapper [kernel.kallsyms] [k] intel_idle
+ 1.34% ovs-vswitchd ovs-vswitchd [.] flow_hash_in_minimask
+ 1.33% ovs-vswitchd ovs-vswitchd [.] rule_actions_unref
+ 1.16% ovs-vswitchd ovs-vswitchd [.] hindex_node_with_hash
+ 1.16% ovs-vswitchd ovs-vswitchd [.] do_xlate_actions
+ 1.09% ovs-vswitchd ovs-vswitchd [.] ofproto_rule_ref
+ 1.01% netperf [kernel.kallsyms] [k] __ticket_spin_lock
...
There is a small increase in kernel spinlock overhead due to the same
spinlock being shared between multiple cores of the same physical CPU,
but that is barely visible in the netperf TCP_CRR test performance
(maybe ~1% performance drop, hard to tell exactly due to variance in
the test results), when testing for kernel module throughput (with no
userspace activity, handful of kernel flows).
On flow setup, a single stats instance is allocated (for the NUMA node
0). As CPUs from multiple NUMA nodes start updating stats, new
NUMA-node specific stats instances are allocated. This allocation on
the packet processing code path is made to never block or look for
emergency memory pools, minimizing the allocation latency. If the
allocation fails, the existing preallocated stats instance is used.
Also, if only CPUs from one NUMA-node are updating the preallocated
stats instance, no additional stats instances are allocated. This
eliminates the need to pre-allocate stats instances that will not be
used, also relieving the stats reader from the burden of reading stats
that are never used.
Signed-off-by: Jarno Rajahalme <jrajahalme@nicira.com>
Acked-by: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: Jesse Gross <jesse@nicira.com>
2014-03-27 20:42:54 +01:00
|
|
|
__GFP_NOMEMALLOC,
|
|
|
|
node);
|
|
|
|
if (likely(new_stats)) {
|
|
|
|
new_stats->used = jiffies;
|
|
|
|
new_stats->packet_count = 1;
|
2014-12-31 17:45:46 +01:00
|
|
|
new_stats->byte_count = len;
|
openvswitch: Per NUMA node flow stats.
Keep kernel flow stats for each NUMA node rather than each (logical)
CPU. This avoids using the per-CPU allocator and removes most of the
kernel-side OVS locking overhead otherwise on the top of perf reports
and allows OVS to scale better with higher number of threads.
With 9 handlers and 4 revalidators netperf TCP_CRR test flow setup
rate doubles on a server with two hyper-threaded physical CPUs (16
logical cores each) compared to the current OVS master. Tested with
non-trivial flow table with a TCP port match rule forcing all new
connections with unique port numbers to OVS userspace. The IP
addresses are still wildcarded, so the kernel flows are not considered
as exact match 5-tuple flows. This type of flows can be expected to
appear in large numbers as the result of more effective wildcarding
made possible by improvements in OVS userspace flow classifier.
Perf results for this test (master):
Events: 305K cycles
+ 8.43% ovs-vswitchd [kernel.kallsyms] [k] mutex_spin_on_owner
+ 5.64% ovs-vswitchd [kernel.kallsyms] [k] __ticket_spin_lock
+ 4.75% ovs-vswitchd ovs-vswitchd [.] find_match_wc
+ 3.32% ovs-vswitchd libpthread-2.15.so [.] pthread_mutex_lock
+ 2.61% ovs-vswitchd [kernel.kallsyms] [k] pcpu_alloc_area
+ 2.19% ovs-vswitchd ovs-vswitchd [.] flow_hash_in_minimask_range
+ 2.03% swapper [kernel.kallsyms] [k] intel_idle
+ 1.84% ovs-vswitchd libpthread-2.15.so [.] pthread_mutex_unlock
+ 1.64% ovs-vswitchd ovs-vswitchd [.] classifier_lookup
+ 1.58% ovs-vswitchd libc-2.15.so [.] 0x7f4e6
+ 1.07% ovs-vswitchd [kernel.kallsyms] [k] memset
+ 1.03% netperf [kernel.kallsyms] [k] __ticket_spin_lock
+ 0.92% swapper [kernel.kallsyms] [k] __ticket_spin_lock
...
And after this patch:
Events: 356K cycles
+ 6.85% ovs-vswitchd ovs-vswitchd [.] find_match_wc
+ 4.63% ovs-vswitchd libpthread-2.15.so [.] pthread_mutex_lock
+ 3.06% ovs-vswitchd [kernel.kallsyms] [k] __ticket_spin_lock
+ 2.81% ovs-vswitchd ovs-vswitchd [.] flow_hash_in_minimask_range
+ 2.51% ovs-vswitchd libpthread-2.15.so [.] pthread_mutex_unlock
+ 2.27% ovs-vswitchd ovs-vswitchd [.] classifier_lookup
+ 1.84% ovs-vswitchd libc-2.15.so [.] 0x15d30f
+ 1.74% ovs-vswitchd [kernel.kallsyms] [k] mutex_spin_on_owner
+ 1.47% swapper [kernel.kallsyms] [k] intel_idle
+ 1.34% ovs-vswitchd ovs-vswitchd [.] flow_hash_in_minimask
+ 1.33% ovs-vswitchd ovs-vswitchd [.] rule_actions_unref
+ 1.16% ovs-vswitchd ovs-vswitchd [.] hindex_node_with_hash
+ 1.16% ovs-vswitchd ovs-vswitchd [.] do_xlate_actions
+ 1.09% ovs-vswitchd ovs-vswitchd [.] ofproto_rule_ref
+ 1.01% netperf [kernel.kallsyms] [k] __ticket_spin_lock
...
There is a small increase in kernel spinlock overhead due to the same
spinlock being shared between multiple cores of the same physical CPU,
but that is barely visible in the netperf TCP_CRR test performance
(maybe ~1% performance drop, hard to tell exactly due to variance in
the test results), when testing for kernel module throughput (with no
userspace activity, handful of kernel flows).
On flow setup, a single stats instance is allocated (for the NUMA node
0). As CPUs from multiple NUMA nodes start updating stats, new
NUMA-node specific stats instances are allocated. This allocation on
the packet processing code path is made to never block or look for
emergency memory pools, minimizing the allocation latency. If the
allocation fails, the existing preallocated stats instance is used.
Also, if only CPUs from one NUMA-node are updating the preallocated
stats instance, no additional stats instances are allocated. This
eliminates the need to pre-allocate stats instances that will not be
used, also relieving the stats reader from the burden of reading stats
that are never used.
Signed-off-by: Jarno Rajahalme <jrajahalme@nicira.com>
Acked-by: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: Jesse Gross <jesse@nicira.com>
2014-03-27 20:42:54 +01:00
|
|
|
new_stats->tcp_flags = tcp_flags;
|
|
|
|
spin_lock_init(&new_stats->lock);
|
|
|
|
|
2016-09-16 00:11:53 +02:00
|
|
|
rcu_assign_pointer(flow->stats[cpu],
|
openvswitch: Per NUMA node flow stats.
Keep kernel flow stats for each NUMA node rather than each (logical)
CPU. This avoids using the per-CPU allocator and removes most of the
kernel-side OVS locking overhead otherwise on the top of perf reports
and allows OVS to scale better with higher number of threads.
With 9 handlers and 4 revalidators netperf TCP_CRR test flow setup
rate doubles on a server with two hyper-threaded physical CPUs (16
logical cores each) compared to the current OVS master. Tested with
non-trivial flow table with a TCP port match rule forcing all new
connections with unique port numbers to OVS userspace. The IP
addresses are still wildcarded, so the kernel flows are not considered
as exact match 5-tuple flows. This type of flows can be expected to
appear in large numbers as the result of more effective wildcarding
made possible by improvements in OVS userspace flow classifier.
Perf results for this test (master):
Events: 305K cycles
+ 8.43% ovs-vswitchd [kernel.kallsyms] [k] mutex_spin_on_owner
+ 5.64% ovs-vswitchd [kernel.kallsyms] [k] __ticket_spin_lock
+ 4.75% ovs-vswitchd ovs-vswitchd [.] find_match_wc
+ 3.32% ovs-vswitchd libpthread-2.15.so [.] pthread_mutex_lock
+ 2.61% ovs-vswitchd [kernel.kallsyms] [k] pcpu_alloc_area
+ 2.19% ovs-vswitchd ovs-vswitchd [.] flow_hash_in_minimask_range
+ 2.03% swapper [kernel.kallsyms] [k] intel_idle
+ 1.84% ovs-vswitchd libpthread-2.15.so [.] pthread_mutex_unlock
+ 1.64% ovs-vswitchd ovs-vswitchd [.] classifier_lookup
+ 1.58% ovs-vswitchd libc-2.15.so [.] 0x7f4e6
+ 1.07% ovs-vswitchd [kernel.kallsyms] [k] memset
+ 1.03% netperf [kernel.kallsyms] [k] __ticket_spin_lock
+ 0.92% swapper [kernel.kallsyms] [k] __ticket_spin_lock
...
And after this patch:
Events: 356K cycles
+ 6.85% ovs-vswitchd ovs-vswitchd [.] find_match_wc
+ 4.63% ovs-vswitchd libpthread-2.15.so [.] pthread_mutex_lock
+ 3.06% ovs-vswitchd [kernel.kallsyms] [k] __ticket_spin_lock
+ 2.81% ovs-vswitchd ovs-vswitchd [.] flow_hash_in_minimask_range
+ 2.51% ovs-vswitchd libpthread-2.15.so [.] pthread_mutex_unlock
+ 2.27% ovs-vswitchd ovs-vswitchd [.] classifier_lookup
+ 1.84% ovs-vswitchd libc-2.15.so [.] 0x15d30f
+ 1.74% ovs-vswitchd [kernel.kallsyms] [k] mutex_spin_on_owner
+ 1.47% swapper [kernel.kallsyms] [k] intel_idle
+ 1.34% ovs-vswitchd ovs-vswitchd [.] flow_hash_in_minimask
+ 1.33% ovs-vswitchd ovs-vswitchd [.] rule_actions_unref
+ 1.16% ovs-vswitchd ovs-vswitchd [.] hindex_node_with_hash
+ 1.16% ovs-vswitchd ovs-vswitchd [.] do_xlate_actions
+ 1.09% ovs-vswitchd ovs-vswitchd [.] ofproto_rule_ref
+ 1.01% netperf [kernel.kallsyms] [k] __ticket_spin_lock
...
There is a small increase in kernel spinlock overhead due to the same
spinlock being shared between multiple cores of the same physical CPU,
but that is barely visible in the netperf TCP_CRR test performance
(maybe ~1% performance drop, hard to tell exactly due to variance in
the test results), when testing for kernel module throughput (with no
userspace activity, handful of kernel flows).
On flow setup, a single stats instance is allocated (for the NUMA node
0). As CPUs from multiple NUMA nodes start updating stats, new
NUMA-node specific stats instances are allocated. This allocation on
the packet processing code path is made to never block or look for
emergency memory pools, minimizing the allocation latency. If the
allocation fails, the existing preallocated stats instance is used.
Also, if only CPUs from one NUMA-node are updating the preallocated
stats instance, no additional stats instances are allocated. This
eliminates the need to pre-allocate stats instances that will not be
used, also relieving the stats reader from the burden of reading stats
that are never used.
Signed-off-by: Jarno Rajahalme <jrajahalme@nicira.com>
Acked-by: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: Jesse Gross <jesse@nicira.com>
2014-03-27 20:42:54 +01:00
|
|
|
new_stats);
|
|
|
|
goto unlock;
|
|
|
|
}
|
|
|
|
}
|
2016-09-16 00:11:53 +02:00
|
|
|
flow->stats_last_writer = cpu;
|
openvswitch: Per NUMA node flow stats.
Keep kernel flow stats for each NUMA node rather than each (logical)
CPU. This avoids using the per-CPU allocator and removes most of the
kernel-side OVS locking overhead otherwise on the top of perf reports
and allows OVS to scale better with higher number of threads.
With 9 handlers and 4 revalidators netperf TCP_CRR test flow setup
rate doubles on a server with two hyper-threaded physical CPUs (16
logical cores each) compared to the current OVS master. Tested with
non-trivial flow table with a TCP port match rule forcing all new
connections with unique port numbers to OVS userspace. The IP
addresses are still wildcarded, so the kernel flows are not considered
as exact match 5-tuple flows. This type of flows can be expected to
appear in large numbers as the result of more effective wildcarding
made possible by improvements in OVS userspace flow classifier.
Perf results for this test (master):
Events: 305K cycles
+ 8.43% ovs-vswitchd [kernel.kallsyms] [k] mutex_spin_on_owner
+ 5.64% ovs-vswitchd [kernel.kallsyms] [k] __ticket_spin_lock
+ 4.75% ovs-vswitchd ovs-vswitchd [.] find_match_wc
+ 3.32% ovs-vswitchd libpthread-2.15.so [.] pthread_mutex_lock
+ 2.61% ovs-vswitchd [kernel.kallsyms] [k] pcpu_alloc_area
+ 2.19% ovs-vswitchd ovs-vswitchd [.] flow_hash_in_minimask_range
+ 2.03% swapper [kernel.kallsyms] [k] intel_idle
+ 1.84% ovs-vswitchd libpthread-2.15.so [.] pthread_mutex_unlock
+ 1.64% ovs-vswitchd ovs-vswitchd [.] classifier_lookup
+ 1.58% ovs-vswitchd libc-2.15.so [.] 0x7f4e6
+ 1.07% ovs-vswitchd [kernel.kallsyms] [k] memset
+ 1.03% netperf [kernel.kallsyms] [k] __ticket_spin_lock
+ 0.92% swapper [kernel.kallsyms] [k] __ticket_spin_lock
...
And after this patch:
Events: 356K cycles
+ 6.85% ovs-vswitchd ovs-vswitchd [.] find_match_wc
+ 4.63% ovs-vswitchd libpthread-2.15.so [.] pthread_mutex_lock
+ 3.06% ovs-vswitchd [kernel.kallsyms] [k] __ticket_spin_lock
+ 2.81% ovs-vswitchd ovs-vswitchd [.] flow_hash_in_minimask_range
+ 2.51% ovs-vswitchd libpthread-2.15.so [.] pthread_mutex_unlock
+ 2.27% ovs-vswitchd ovs-vswitchd [.] classifier_lookup
+ 1.84% ovs-vswitchd libc-2.15.so [.] 0x15d30f
+ 1.74% ovs-vswitchd [kernel.kallsyms] [k] mutex_spin_on_owner
+ 1.47% swapper [kernel.kallsyms] [k] intel_idle
+ 1.34% ovs-vswitchd ovs-vswitchd [.] flow_hash_in_minimask
+ 1.33% ovs-vswitchd ovs-vswitchd [.] rule_actions_unref
+ 1.16% ovs-vswitchd ovs-vswitchd [.] hindex_node_with_hash
+ 1.16% ovs-vswitchd ovs-vswitchd [.] do_xlate_actions
+ 1.09% ovs-vswitchd ovs-vswitchd [.] ofproto_rule_ref
+ 1.01% netperf [kernel.kallsyms] [k] __ticket_spin_lock
...
There is a small increase in kernel spinlock overhead due to the same
spinlock being shared between multiple cores of the same physical CPU,
but that is barely visible in the netperf TCP_CRR test performance
(maybe ~1% performance drop, hard to tell exactly due to variance in
the test results), when testing for kernel module throughput (with no
userspace activity, handful of kernel flows).
On flow setup, a single stats instance is allocated (for the NUMA node
0). As CPUs from multiple NUMA nodes start updating stats, new
NUMA-node specific stats instances are allocated. This allocation on
the packet processing code path is made to never block or look for
emergency memory pools, minimizing the allocation latency. If the
allocation fails, the existing preallocated stats instance is used.
Also, if only CPUs from one NUMA-node are updating the preallocated
stats instance, no additional stats instances are allocated. This
eliminates the need to pre-allocate stats instances that will not be
used, also relieving the stats reader from the burden of reading stats
that are never used.
Signed-off-by: Jarno Rajahalme <jrajahalme@nicira.com>
Acked-by: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: Jesse Gross <jesse@nicira.com>
2014-03-27 20:42:54 +01:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2013-10-30 01:22:21 +01:00
|
|
|
stats->used = jiffies;
|
|
|
|
stats->packet_count++;
|
2014-12-31 17:45:46 +01:00
|
|
|
stats->byte_count += len;
|
2013-10-30 01:22:21 +01:00
|
|
|
stats->tcp_flags |= tcp_flags;
|
openvswitch: Per NUMA node flow stats.
Keep kernel flow stats for each NUMA node rather than each (logical)
CPU. This avoids using the per-CPU allocator and removes most of the
kernel-side OVS locking overhead otherwise on the top of perf reports
and allows OVS to scale better with higher number of threads.
With 9 handlers and 4 revalidators netperf TCP_CRR test flow setup
rate doubles on a server with two hyper-threaded physical CPUs (16
logical cores each) compared to the current OVS master. Tested with
non-trivial flow table with a TCP port match rule forcing all new
connections with unique port numbers to OVS userspace. The IP
addresses are still wildcarded, so the kernel flows are not considered
as exact match 5-tuple flows. This type of flows can be expected to
appear in large numbers as the result of more effective wildcarding
made possible by improvements in OVS userspace flow classifier.
Perf results for this test (master):
Events: 305K cycles
+ 8.43% ovs-vswitchd [kernel.kallsyms] [k] mutex_spin_on_owner
+ 5.64% ovs-vswitchd [kernel.kallsyms] [k] __ticket_spin_lock
+ 4.75% ovs-vswitchd ovs-vswitchd [.] find_match_wc
+ 3.32% ovs-vswitchd libpthread-2.15.so [.] pthread_mutex_lock
+ 2.61% ovs-vswitchd [kernel.kallsyms] [k] pcpu_alloc_area
+ 2.19% ovs-vswitchd ovs-vswitchd [.] flow_hash_in_minimask_range
+ 2.03% swapper [kernel.kallsyms] [k] intel_idle
+ 1.84% ovs-vswitchd libpthread-2.15.so [.] pthread_mutex_unlock
+ 1.64% ovs-vswitchd ovs-vswitchd [.] classifier_lookup
+ 1.58% ovs-vswitchd libc-2.15.so [.] 0x7f4e6
+ 1.07% ovs-vswitchd [kernel.kallsyms] [k] memset
+ 1.03% netperf [kernel.kallsyms] [k] __ticket_spin_lock
+ 0.92% swapper [kernel.kallsyms] [k] __ticket_spin_lock
...
And after this patch:
Events: 356K cycles
+ 6.85% ovs-vswitchd ovs-vswitchd [.] find_match_wc
+ 4.63% ovs-vswitchd libpthread-2.15.so [.] pthread_mutex_lock
+ 3.06% ovs-vswitchd [kernel.kallsyms] [k] __ticket_spin_lock
+ 2.81% ovs-vswitchd ovs-vswitchd [.] flow_hash_in_minimask_range
+ 2.51% ovs-vswitchd libpthread-2.15.so [.] pthread_mutex_unlock
+ 2.27% ovs-vswitchd ovs-vswitchd [.] classifier_lookup
+ 1.84% ovs-vswitchd libc-2.15.so [.] 0x15d30f
+ 1.74% ovs-vswitchd [kernel.kallsyms] [k] mutex_spin_on_owner
+ 1.47% swapper [kernel.kallsyms] [k] intel_idle
+ 1.34% ovs-vswitchd ovs-vswitchd [.] flow_hash_in_minimask
+ 1.33% ovs-vswitchd ovs-vswitchd [.] rule_actions_unref
+ 1.16% ovs-vswitchd ovs-vswitchd [.] hindex_node_with_hash
+ 1.16% ovs-vswitchd ovs-vswitchd [.] do_xlate_actions
+ 1.09% ovs-vswitchd ovs-vswitchd [.] ofproto_rule_ref
+ 1.01% netperf [kernel.kallsyms] [k] __ticket_spin_lock
...
There is a small increase in kernel spinlock overhead due to the same
spinlock being shared between multiple cores of the same physical CPU,
but that is barely visible in the netperf TCP_CRR test performance
(maybe ~1% performance drop, hard to tell exactly due to variance in
the test results), when testing for kernel module throughput (with no
userspace activity, handful of kernel flows).
On flow setup, a single stats instance is allocated (for the NUMA node
0). As CPUs from multiple NUMA nodes start updating stats, new
NUMA-node specific stats instances are allocated. This allocation on
the packet processing code path is made to never block or look for
emergency memory pools, minimizing the allocation latency. If the
allocation fails, the existing preallocated stats instance is used.
Also, if only CPUs from one NUMA-node are updating the preallocated
stats instance, no additional stats instances are allocated. This
eliminates the need to pre-allocate stats instances that will not be
used, also relieving the stats reader from the burden of reading stats
that are never used.
Signed-off-by: Jarno Rajahalme <jrajahalme@nicira.com>
Acked-by: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: Jesse Gross <jesse@nicira.com>
2014-03-27 20:42:54 +01:00
|
|
|
unlock:
|
2013-10-30 01:22:21 +01:00
|
|
|
spin_unlock(&stats->lock);
|
|
|
|
}
|
|
|
|
|
2014-05-05 23:17:28 +02:00
|
|
|
/* Must be called with rcu_read_lock or ovs_mutex. */
|
|
|
|
void ovs_flow_stats_get(const struct sw_flow *flow,
|
|
|
|
struct ovs_flow_stats *ovs_stats,
|
2013-10-30 01:22:21 +01:00
|
|
|
unsigned long *used, __be16 *tcp_flags)
|
|
|
|
{
|
2016-09-16 00:11:53 +02:00
|
|
|
int cpu;
|
2013-10-30 01:22:21 +01:00
|
|
|
|
|
|
|
*used = 0;
|
|
|
|
*tcp_flags = 0;
|
|
|
|
memset(ovs_stats, 0, sizeof(*ovs_stats));
|
|
|
|
|
2016-09-16 00:11:53 +02:00
|
|
|
/* We open code this to make sure cpu 0 is always considered */
|
|
|
|
for (cpu = 0; cpu < nr_cpu_ids; cpu = cpumask_next(cpu, cpu_possible_mask)) {
|
|
|
|
struct flow_stats *stats = rcu_dereference_ovsl(flow->stats[cpu]);
|
openvswitch: Per NUMA node flow stats.
Keep kernel flow stats for each NUMA node rather than each (logical)
CPU. This avoids using the per-CPU allocator and removes most of the
kernel-side OVS locking overhead otherwise on the top of perf reports
and allows OVS to scale better with higher number of threads.
With 9 handlers and 4 revalidators netperf TCP_CRR test flow setup
rate doubles on a server with two hyper-threaded physical CPUs (16
logical cores each) compared to the current OVS master. Tested with
non-trivial flow table with a TCP port match rule forcing all new
connections with unique port numbers to OVS userspace. The IP
addresses are still wildcarded, so the kernel flows are not considered
as exact match 5-tuple flows. This type of flows can be expected to
appear in large numbers as the result of more effective wildcarding
made possible by improvements in OVS userspace flow classifier.
Perf results for this test (master):
Events: 305K cycles
+ 8.43% ovs-vswitchd [kernel.kallsyms] [k] mutex_spin_on_owner
+ 5.64% ovs-vswitchd [kernel.kallsyms] [k] __ticket_spin_lock
+ 4.75% ovs-vswitchd ovs-vswitchd [.] find_match_wc
+ 3.32% ovs-vswitchd libpthread-2.15.so [.] pthread_mutex_lock
+ 2.61% ovs-vswitchd [kernel.kallsyms] [k] pcpu_alloc_area
+ 2.19% ovs-vswitchd ovs-vswitchd [.] flow_hash_in_minimask_range
+ 2.03% swapper [kernel.kallsyms] [k] intel_idle
+ 1.84% ovs-vswitchd libpthread-2.15.so [.] pthread_mutex_unlock
+ 1.64% ovs-vswitchd ovs-vswitchd [.] classifier_lookup
+ 1.58% ovs-vswitchd libc-2.15.so [.] 0x7f4e6
+ 1.07% ovs-vswitchd [kernel.kallsyms] [k] memset
+ 1.03% netperf [kernel.kallsyms] [k] __ticket_spin_lock
+ 0.92% swapper [kernel.kallsyms] [k] __ticket_spin_lock
...
And after this patch:
Events: 356K cycles
+ 6.85% ovs-vswitchd ovs-vswitchd [.] find_match_wc
+ 4.63% ovs-vswitchd libpthread-2.15.so [.] pthread_mutex_lock
+ 3.06% ovs-vswitchd [kernel.kallsyms] [k] __ticket_spin_lock
+ 2.81% ovs-vswitchd ovs-vswitchd [.] flow_hash_in_minimask_range
+ 2.51% ovs-vswitchd libpthread-2.15.so [.] pthread_mutex_unlock
+ 2.27% ovs-vswitchd ovs-vswitchd [.] classifier_lookup
+ 1.84% ovs-vswitchd libc-2.15.so [.] 0x15d30f
+ 1.74% ovs-vswitchd [kernel.kallsyms] [k] mutex_spin_on_owner
+ 1.47% swapper [kernel.kallsyms] [k] intel_idle
+ 1.34% ovs-vswitchd ovs-vswitchd [.] flow_hash_in_minimask
+ 1.33% ovs-vswitchd ovs-vswitchd [.] rule_actions_unref
+ 1.16% ovs-vswitchd ovs-vswitchd [.] hindex_node_with_hash
+ 1.16% ovs-vswitchd ovs-vswitchd [.] do_xlate_actions
+ 1.09% ovs-vswitchd ovs-vswitchd [.] ofproto_rule_ref
+ 1.01% netperf [kernel.kallsyms] [k] __ticket_spin_lock
...
There is a small increase in kernel spinlock overhead due to the same
spinlock being shared between multiple cores of the same physical CPU,
but that is barely visible in the netperf TCP_CRR test performance
(maybe ~1% performance drop, hard to tell exactly due to variance in
the test results), when testing for kernel module throughput (with no
userspace activity, handful of kernel flows).
On flow setup, a single stats instance is allocated (for the NUMA node
0). As CPUs from multiple NUMA nodes start updating stats, new
NUMA-node specific stats instances are allocated. This allocation on
the packet processing code path is made to never block or look for
emergency memory pools, minimizing the allocation latency. If the
allocation fails, the existing preallocated stats instance is used.
Also, if only CPUs from one NUMA-node are updating the preallocated
stats instance, no additional stats instances are allocated. This
eliminates the need to pre-allocate stats instances that will not be
used, also relieving the stats reader from the burden of reading stats
that are never used.
Signed-off-by: Jarno Rajahalme <jrajahalme@nicira.com>
Acked-by: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: Jesse Gross <jesse@nicira.com>
2014-03-27 20:42:54 +01:00
|
|
|
|
|
|
|
if (stats) {
|
|
|
|
/* Local CPU may write on non-local stats, so we must
|
|
|
|
* block bottom-halves here.
|
|
|
|
*/
|
|
|
|
spin_lock_bh(&stats->lock);
|
|
|
|
if (!*used || time_after(stats->used, *used))
|
|
|
|
*used = stats->used;
|
|
|
|
*tcp_flags |= stats->tcp_flags;
|
|
|
|
ovs_stats->n_packets += stats->packet_count;
|
|
|
|
ovs_stats->n_bytes += stats->byte_count;
|
|
|
|
spin_unlock_bh(&stats->lock);
|
|
|
|
}
|
2013-10-30 01:22:21 +01:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-05-05 23:17:28 +02:00
|
|
|
/* Called with ovs_mutex. */
|
2013-10-30 01:22:21 +01:00
|
|
|
void ovs_flow_stats_clear(struct sw_flow *flow)
|
|
|
|
{
|
2016-09-16 00:11:53 +02:00
|
|
|
int cpu;
|
openvswitch: Per NUMA node flow stats.
Keep kernel flow stats for each NUMA node rather than each (logical)
CPU. This avoids using the per-CPU allocator and removes most of the
kernel-side OVS locking overhead otherwise on the top of perf reports
and allows OVS to scale better with higher number of threads.
With 9 handlers and 4 revalidators netperf TCP_CRR test flow setup
rate doubles on a server with two hyper-threaded physical CPUs (16
logical cores each) compared to the current OVS master. Tested with
non-trivial flow table with a TCP port match rule forcing all new
connections with unique port numbers to OVS userspace. The IP
addresses are still wildcarded, so the kernel flows are not considered
as exact match 5-tuple flows. This type of flows can be expected to
appear in large numbers as the result of more effective wildcarding
made possible by improvements in OVS userspace flow classifier.
Perf results for this test (master):
Events: 305K cycles
+ 8.43% ovs-vswitchd [kernel.kallsyms] [k] mutex_spin_on_owner
+ 5.64% ovs-vswitchd [kernel.kallsyms] [k] __ticket_spin_lock
+ 4.75% ovs-vswitchd ovs-vswitchd [.] find_match_wc
+ 3.32% ovs-vswitchd libpthread-2.15.so [.] pthread_mutex_lock
+ 2.61% ovs-vswitchd [kernel.kallsyms] [k] pcpu_alloc_area
+ 2.19% ovs-vswitchd ovs-vswitchd [.] flow_hash_in_minimask_range
+ 2.03% swapper [kernel.kallsyms] [k] intel_idle
+ 1.84% ovs-vswitchd libpthread-2.15.so [.] pthread_mutex_unlock
+ 1.64% ovs-vswitchd ovs-vswitchd [.] classifier_lookup
+ 1.58% ovs-vswitchd libc-2.15.so [.] 0x7f4e6
+ 1.07% ovs-vswitchd [kernel.kallsyms] [k] memset
+ 1.03% netperf [kernel.kallsyms] [k] __ticket_spin_lock
+ 0.92% swapper [kernel.kallsyms] [k] __ticket_spin_lock
...
And after this patch:
Events: 356K cycles
+ 6.85% ovs-vswitchd ovs-vswitchd [.] find_match_wc
+ 4.63% ovs-vswitchd libpthread-2.15.so [.] pthread_mutex_lock
+ 3.06% ovs-vswitchd [kernel.kallsyms] [k] __ticket_spin_lock
+ 2.81% ovs-vswitchd ovs-vswitchd [.] flow_hash_in_minimask_range
+ 2.51% ovs-vswitchd libpthread-2.15.so [.] pthread_mutex_unlock
+ 2.27% ovs-vswitchd ovs-vswitchd [.] classifier_lookup
+ 1.84% ovs-vswitchd libc-2.15.so [.] 0x15d30f
+ 1.74% ovs-vswitchd [kernel.kallsyms] [k] mutex_spin_on_owner
+ 1.47% swapper [kernel.kallsyms] [k] intel_idle
+ 1.34% ovs-vswitchd ovs-vswitchd [.] flow_hash_in_minimask
+ 1.33% ovs-vswitchd ovs-vswitchd [.] rule_actions_unref
+ 1.16% ovs-vswitchd ovs-vswitchd [.] hindex_node_with_hash
+ 1.16% ovs-vswitchd ovs-vswitchd [.] do_xlate_actions
+ 1.09% ovs-vswitchd ovs-vswitchd [.] ofproto_rule_ref
+ 1.01% netperf [kernel.kallsyms] [k] __ticket_spin_lock
...
There is a small increase in kernel spinlock overhead due to the same
spinlock being shared between multiple cores of the same physical CPU,
but that is barely visible in the netperf TCP_CRR test performance
(maybe ~1% performance drop, hard to tell exactly due to variance in
the test results), when testing for kernel module throughput (with no
userspace activity, handful of kernel flows).
On flow setup, a single stats instance is allocated (for the NUMA node
0). As CPUs from multiple NUMA nodes start updating stats, new
NUMA-node specific stats instances are allocated. This allocation on
the packet processing code path is made to never block or look for
emergency memory pools, minimizing the allocation latency. If the
allocation fails, the existing preallocated stats instance is used.
Also, if only CPUs from one NUMA-node are updating the preallocated
stats instance, no additional stats instances are allocated. This
eliminates the need to pre-allocate stats instances that will not be
used, also relieving the stats reader from the burden of reading stats
that are never used.
Signed-off-by: Jarno Rajahalme <jrajahalme@nicira.com>
Acked-by: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: Jesse Gross <jesse@nicira.com>
2014-03-27 20:42:54 +01:00
|
|
|
|
2016-09-16 00:11:53 +02:00
|
|
|
/* We open code this to make sure cpu 0 is always considered */
|
|
|
|
for (cpu = 0; cpu < nr_cpu_ids; cpu = cpumask_next(cpu, cpu_possible_mask)) {
|
|
|
|
struct flow_stats *stats = ovsl_dereference(flow->stats[cpu]);
|
openvswitch: Per NUMA node flow stats.
Keep kernel flow stats for each NUMA node rather than each (logical)
CPU. This avoids using the per-CPU allocator and removes most of the
kernel-side OVS locking overhead otherwise on the top of perf reports
and allows OVS to scale better with higher number of threads.
With 9 handlers and 4 revalidators netperf TCP_CRR test flow setup
rate doubles on a server with two hyper-threaded physical CPUs (16
logical cores each) compared to the current OVS master. Tested with
non-trivial flow table with a TCP port match rule forcing all new
connections with unique port numbers to OVS userspace. The IP
addresses are still wildcarded, so the kernel flows are not considered
as exact match 5-tuple flows. This type of flows can be expected to
appear in large numbers as the result of more effective wildcarding
made possible by improvements in OVS userspace flow classifier.
Perf results for this test (master):
Events: 305K cycles
+ 8.43% ovs-vswitchd [kernel.kallsyms] [k] mutex_spin_on_owner
+ 5.64% ovs-vswitchd [kernel.kallsyms] [k] __ticket_spin_lock
+ 4.75% ovs-vswitchd ovs-vswitchd [.] find_match_wc
+ 3.32% ovs-vswitchd libpthread-2.15.so [.] pthread_mutex_lock
+ 2.61% ovs-vswitchd [kernel.kallsyms] [k] pcpu_alloc_area
+ 2.19% ovs-vswitchd ovs-vswitchd [.] flow_hash_in_minimask_range
+ 2.03% swapper [kernel.kallsyms] [k] intel_idle
+ 1.84% ovs-vswitchd libpthread-2.15.so [.] pthread_mutex_unlock
+ 1.64% ovs-vswitchd ovs-vswitchd [.] classifier_lookup
+ 1.58% ovs-vswitchd libc-2.15.so [.] 0x7f4e6
+ 1.07% ovs-vswitchd [kernel.kallsyms] [k] memset
+ 1.03% netperf [kernel.kallsyms] [k] __ticket_spin_lock
+ 0.92% swapper [kernel.kallsyms] [k] __ticket_spin_lock
...
And after this patch:
Events: 356K cycles
+ 6.85% ovs-vswitchd ovs-vswitchd [.] find_match_wc
+ 4.63% ovs-vswitchd libpthread-2.15.so [.] pthread_mutex_lock
+ 3.06% ovs-vswitchd [kernel.kallsyms] [k] __ticket_spin_lock
+ 2.81% ovs-vswitchd ovs-vswitchd [.] flow_hash_in_minimask_range
+ 2.51% ovs-vswitchd libpthread-2.15.so [.] pthread_mutex_unlock
+ 2.27% ovs-vswitchd ovs-vswitchd [.] classifier_lookup
+ 1.84% ovs-vswitchd libc-2.15.so [.] 0x15d30f
+ 1.74% ovs-vswitchd [kernel.kallsyms] [k] mutex_spin_on_owner
+ 1.47% swapper [kernel.kallsyms] [k] intel_idle
+ 1.34% ovs-vswitchd ovs-vswitchd [.] flow_hash_in_minimask
+ 1.33% ovs-vswitchd ovs-vswitchd [.] rule_actions_unref
+ 1.16% ovs-vswitchd ovs-vswitchd [.] hindex_node_with_hash
+ 1.16% ovs-vswitchd ovs-vswitchd [.] do_xlate_actions
+ 1.09% ovs-vswitchd ovs-vswitchd [.] ofproto_rule_ref
+ 1.01% netperf [kernel.kallsyms] [k] __ticket_spin_lock
...
There is a small increase in kernel spinlock overhead due to the same
spinlock being shared between multiple cores of the same physical CPU,
but that is barely visible in the netperf TCP_CRR test performance
(maybe ~1% performance drop, hard to tell exactly due to variance in
the test results), when testing for kernel module throughput (with no
userspace activity, handful of kernel flows).
On flow setup, a single stats instance is allocated (for the NUMA node
0). As CPUs from multiple NUMA nodes start updating stats, new
NUMA-node specific stats instances are allocated. This allocation on
the packet processing code path is made to never block or look for
emergency memory pools, minimizing the allocation latency. If the
allocation fails, the existing preallocated stats instance is used.
Also, if only CPUs from one NUMA-node are updating the preallocated
stats instance, no additional stats instances are allocated. This
eliminates the need to pre-allocate stats instances that will not be
used, also relieving the stats reader from the burden of reading stats
that are never used.
Signed-off-by: Jarno Rajahalme <jrajahalme@nicira.com>
Acked-by: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: Jesse Gross <jesse@nicira.com>
2014-03-27 20:42:54 +01:00
|
|
|
|
|
|
|
if (stats) {
|
|
|
|
spin_lock_bh(&stats->lock);
|
|
|
|
stats->used = 0;
|
|
|
|
stats->packet_count = 0;
|
|
|
|
stats->byte_count = 0;
|
|
|
|
stats->tcp_flags = 0;
|
|
|
|
spin_unlock_bh(&stats->lock);
|
|
|
|
}
|
|
|
|
}
|
2013-08-08 05:01:00 +02:00
|
|
|
}
|
|
|
|
|
2011-10-26 04:26:31 +02:00
|
|
|
static int check_header(struct sk_buff *skb, int len)
|
|
|
|
{
|
|
|
|
if (unlikely(skb->len < len))
|
|
|
|
return -EINVAL;
|
|
|
|
if (unlikely(!pskb_may_pull(skb, len)))
|
|
|
|
return -ENOMEM;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static bool arphdr_ok(struct sk_buff *skb)
|
|
|
|
{
|
|
|
|
return pskb_may_pull(skb, skb_network_offset(skb) +
|
|
|
|
sizeof(struct arp_eth_header));
|
|
|
|
}
|
|
|
|
|
|
|
|
static int check_iphdr(struct sk_buff *skb)
|
|
|
|
{
|
|
|
|
unsigned int nh_ofs = skb_network_offset(skb);
|
|
|
|
unsigned int ip_len;
|
|
|
|
int err;
|
|
|
|
|
|
|
|
err = check_header(skb, nh_ofs + sizeof(struct iphdr));
|
|
|
|
if (unlikely(err))
|
|
|
|
return err;
|
|
|
|
|
|
|
|
ip_len = ip_hdrlen(skb);
|
|
|
|
if (unlikely(ip_len < sizeof(struct iphdr) ||
|
|
|
|
skb->len < nh_ofs + ip_len))
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
skb_set_transport_header(skb, nh_ofs + ip_len);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static bool tcphdr_ok(struct sk_buff *skb)
|
|
|
|
{
|
|
|
|
int th_ofs = skb_transport_offset(skb);
|
|
|
|
int tcp_len;
|
|
|
|
|
|
|
|
if (unlikely(!pskb_may_pull(skb, th_ofs + sizeof(struct tcphdr))))
|
|
|
|
return false;
|
|
|
|
|
|
|
|
tcp_len = tcp_hdrlen(skb);
|
|
|
|
if (unlikely(tcp_len < sizeof(struct tcphdr) ||
|
|
|
|
skb->len < th_ofs + tcp_len))
|
|
|
|
return false;
|
|
|
|
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
|
|
|
|
static bool udphdr_ok(struct sk_buff *skb)
|
|
|
|
{
|
|
|
|
return pskb_may_pull(skb, skb_transport_offset(skb) +
|
|
|
|
sizeof(struct udphdr));
|
|
|
|
}
|
|
|
|
|
2013-08-22 21:30:48 +02:00
|
|
|
static bool sctphdr_ok(struct sk_buff *skb)
|
|
|
|
{
|
|
|
|
return pskb_may_pull(skb, skb_transport_offset(skb) +
|
|
|
|
sizeof(struct sctphdr));
|
|
|
|
}
|
|
|
|
|
2011-10-26 04:26:31 +02:00
|
|
|
static bool icmphdr_ok(struct sk_buff *skb)
|
|
|
|
{
|
|
|
|
return pskb_may_pull(skb, skb_transport_offset(skb) +
|
|
|
|
sizeof(struct icmphdr));
|
|
|
|
}
|
|
|
|
|
2013-08-08 05:01:00 +02:00
|
|
|
static int parse_ipv6hdr(struct sk_buff *skb, struct sw_flow_key *key)
|
2011-10-26 04:26:31 +02:00
|
|
|
{
|
|
|
|
unsigned int nh_ofs = skb_network_offset(skb);
|
|
|
|
unsigned int nh_len;
|
|
|
|
int payload_ofs;
|
|
|
|
struct ipv6hdr *nh;
|
|
|
|
uint8_t nexthdr;
|
|
|
|
__be16 frag_off;
|
|
|
|
int err;
|
|
|
|
|
|
|
|
err = check_header(skb, nh_ofs + sizeof(*nh));
|
|
|
|
if (unlikely(err))
|
|
|
|
return err;
|
|
|
|
|
|
|
|
nh = ipv6_hdr(skb);
|
|
|
|
nexthdr = nh->nexthdr;
|
|
|
|
payload_ofs = (u8 *)(nh + 1) - skb->data;
|
|
|
|
|
|
|
|
key->ip.proto = NEXTHDR_NONE;
|
|
|
|
key->ip.tos = ipv6_get_dsfield(nh);
|
|
|
|
key->ip.ttl = nh->hop_limit;
|
|
|
|
key->ipv6.label = *(__be32 *)nh & htonl(IPV6_FLOWINFO_FLOWLABEL);
|
|
|
|
key->ipv6.addr.src = nh->saddr;
|
|
|
|
key->ipv6.addr.dst = nh->daddr;
|
|
|
|
|
|
|
|
payload_ofs = ipv6_skip_exthdr(skb, payload_ofs, &nexthdr, &frag_off);
|
|
|
|
|
|
|
|
if (frag_off) {
|
|
|
|
if (frag_off & htons(~0x7))
|
|
|
|
key->ip.frag = OVS_FRAG_TYPE_LATER;
|
|
|
|
else
|
|
|
|
key->ip.frag = OVS_FRAG_TYPE_FIRST;
|
2014-10-17 22:56:31 +02:00
|
|
|
} else {
|
|
|
|
key->ip.frag = OVS_FRAG_TYPE_NONE;
|
2011-10-26 04:26:31 +02:00
|
|
|
}
|
|
|
|
|
2015-08-29 02:02:21 +02:00
|
|
|
/* Delayed handling of error in ipv6_skip_exthdr() as it
|
|
|
|
* always sets frag_off to a valid value which may be
|
|
|
|
* used to set key->ip.frag above.
|
|
|
|
*/
|
|
|
|
if (unlikely(payload_ofs < 0))
|
|
|
|
return -EPROTO;
|
|
|
|
|
2011-10-26 04:26:31 +02:00
|
|
|
nh_len = payload_ofs - nh_ofs;
|
|
|
|
skb_set_transport_header(skb, nh_ofs + nh_len);
|
|
|
|
key->ip.proto = nexthdr;
|
|
|
|
return nh_len;
|
|
|
|
}
|
|
|
|
|
|
|
|
static bool icmp6hdr_ok(struct sk_buff *skb)
|
|
|
|
{
|
|
|
|
return pskb_may_pull(skb, skb_transport_offset(skb) +
|
|
|
|
sizeof(struct icmp6hdr));
|
|
|
|
}
|
|
|
|
|
2016-09-07 18:56:59 +02:00
|
|
|
/**
|
|
|
|
* Parse vlan tag from vlan header.
|
|
|
|
* Returns ERROR on memory error.
|
|
|
|
* Returns 0 if it encounters a non-vlan or incomplete packet.
|
|
|
|
* Returns 1 after successfully parsing vlan tag.
|
|
|
|
*/
|
|
|
|
static int parse_vlan_tag(struct sk_buff *skb, struct vlan_head *key_vh)
|
2011-10-26 04:26:31 +02:00
|
|
|
{
|
2016-09-07 18:56:59 +02:00
|
|
|
struct vlan_head *vh = (struct vlan_head *)skb->data;
|
2011-10-26 04:26:31 +02:00
|
|
|
|
2016-09-07 18:56:59 +02:00
|
|
|
if (likely(!eth_type_vlan(vh->tpid)))
|
2011-10-26 04:26:31 +02:00
|
|
|
return 0;
|
|
|
|
|
2016-09-07 18:56:59 +02:00
|
|
|
if (unlikely(skb->len < sizeof(struct vlan_head) + sizeof(__be16)))
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
if (unlikely(!pskb_may_pull(skb, sizeof(struct vlan_head) +
|
|
|
|
sizeof(__be16))))
|
2011-10-26 04:26:31 +02:00
|
|
|
return -ENOMEM;
|
|
|
|
|
2016-09-07 18:56:59 +02:00
|
|
|
vh = (struct vlan_head *)skb->data;
|
|
|
|
key_vh->tci = vh->tci | htons(VLAN_TAG_PRESENT);
|
|
|
|
key_vh->tpid = vh->tpid;
|
|
|
|
|
|
|
|
__skb_pull(skb, sizeof(struct vlan_head));
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
2016-11-10 16:28:21 +01:00
|
|
|
static void clear_vlan(struct sw_flow_key *key)
|
2016-09-07 18:56:59 +02:00
|
|
|
{
|
|
|
|
key->eth.vlan.tci = 0;
|
|
|
|
key->eth.vlan.tpid = 0;
|
|
|
|
key->eth.cvlan.tci = 0;
|
|
|
|
key->eth.cvlan.tpid = 0;
|
2016-11-10 16:28:21 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
static int parse_vlan(struct sk_buff *skb, struct sw_flow_key *key)
|
|
|
|
{
|
|
|
|
int res;
|
2016-09-07 18:56:59 +02:00
|
|
|
|
2016-10-10 17:02:42 +02:00
|
|
|
if (skb_vlan_tag_present(skb)) {
|
2016-09-07 18:56:59 +02:00
|
|
|
key->eth.vlan.tci = htons(skb->vlan_tci);
|
|
|
|
key->eth.vlan.tpid = skb->vlan_proto;
|
|
|
|
} else {
|
|
|
|
/* Parse outer vlan tag in the non-accelerated case. */
|
|
|
|
res = parse_vlan_tag(skb, &key->eth.vlan);
|
|
|
|
if (res <= 0)
|
|
|
|
return res;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Parse inner vlan tag. */
|
|
|
|
res = parse_vlan_tag(skb, &key->eth.cvlan);
|
|
|
|
if (res <= 0)
|
|
|
|
return res;
|
2011-10-26 04:26:31 +02:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static __be16 parse_ethertype(struct sk_buff *skb)
|
|
|
|
{
|
|
|
|
struct llc_snap_hdr {
|
|
|
|
u8 dsap; /* Always 0xAA */
|
|
|
|
u8 ssap; /* Always 0xAA */
|
|
|
|
u8 ctrl;
|
|
|
|
u8 oui[3];
|
|
|
|
__be16 ethertype;
|
|
|
|
};
|
|
|
|
struct llc_snap_hdr *llc;
|
|
|
|
__be16 proto;
|
|
|
|
|
|
|
|
proto = *(__be16 *) skb->data;
|
|
|
|
__skb_pull(skb, sizeof(__be16));
|
|
|
|
|
2015-05-04 23:34:05 +02:00
|
|
|
if (eth_proto_is_802_3(proto))
|
2011-10-26 04:26:31 +02:00
|
|
|
return proto;
|
|
|
|
|
|
|
|
if (skb->len < sizeof(struct llc_snap_hdr))
|
|
|
|
return htons(ETH_P_802_2);
|
|
|
|
|
|
|
|
if (unlikely(!pskb_may_pull(skb, sizeof(struct llc_snap_hdr))))
|
|
|
|
return htons(0);
|
|
|
|
|
|
|
|
llc = (struct llc_snap_hdr *) skb->data;
|
|
|
|
if (llc->dsap != LLC_SAP_SNAP ||
|
|
|
|
llc->ssap != LLC_SAP_SNAP ||
|
|
|
|
(llc->oui[0] | llc->oui[1] | llc->oui[2]) != 0)
|
|
|
|
return htons(ETH_P_802_2);
|
|
|
|
|
|
|
|
__skb_pull(skb, sizeof(struct llc_snap_hdr));
|
2013-02-19 20:10:30 +01:00
|
|
|
|
2015-05-04 23:34:05 +02:00
|
|
|
if (eth_proto_is_802_3(llc->ethertype))
|
2013-02-19 20:10:30 +01:00
|
|
|
return llc->ethertype;
|
|
|
|
|
|
|
|
return htons(ETH_P_802_2);
|
2011-10-26 04:26:31 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
static int parse_icmpv6(struct sk_buff *skb, struct sw_flow_key *key,
|
2013-08-08 05:01:00 +02:00
|
|
|
int nh_len)
|
2011-10-26 04:26:31 +02:00
|
|
|
{
|
|
|
|
struct icmp6hdr *icmp = icmp6_hdr(skb);
|
|
|
|
|
|
|
|
/* The ICMPv6 type and code fields use the 16-bit transport port
|
|
|
|
* fields, so we need to store them in 16-bit network byte order.
|
|
|
|
*/
|
2014-05-05 18:54:49 +02:00
|
|
|
key->tp.src = htons(icmp->icmp6_type);
|
|
|
|
key->tp.dst = htons(icmp->icmp6_code);
|
2014-10-17 22:56:31 +02:00
|
|
|
memset(&key->ipv6.nd, 0, sizeof(key->ipv6.nd));
|
2011-10-26 04:26:31 +02:00
|
|
|
|
|
|
|
if (icmp->icmp6_code == 0 &&
|
|
|
|
(icmp->icmp6_type == NDISC_NEIGHBOUR_SOLICITATION ||
|
|
|
|
icmp->icmp6_type == NDISC_NEIGHBOUR_ADVERTISEMENT)) {
|
|
|
|
int icmp_len = skb->len - skb_transport_offset(skb);
|
|
|
|
struct nd_msg *nd;
|
|
|
|
int offset;
|
|
|
|
|
|
|
|
/* In order to process neighbor discovery options, we need the
|
|
|
|
* entire packet.
|
|
|
|
*/
|
|
|
|
if (unlikely(icmp_len < sizeof(*nd)))
|
2013-08-08 05:01:00 +02:00
|
|
|
return 0;
|
|
|
|
|
|
|
|
if (unlikely(skb_linearize(skb)))
|
|
|
|
return -ENOMEM;
|
2011-10-26 04:26:31 +02:00
|
|
|
|
|
|
|
nd = (struct nd_msg *)skb_transport_header(skb);
|
|
|
|
key->ipv6.nd.target = nd->target;
|
|
|
|
|
|
|
|
icmp_len -= sizeof(*nd);
|
|
|
|
offset = 0;
|
|
|
|
while (icmp_len >= 8) {
|
|
|
|
struct nd_opt_hdr *nd_opt =
|
|
|
|
(struct nd_opt_hdr *)(nd->opt + offset);
|
|
|
|
int opt_len = nd_opt->nd_opt_len * 8;
|
|
|
|
|
|
|
|
if (unlikely(!opt_len || opt_len > icmp_len))
|
2013-08-08 05:01:00 +02:00
|
|
|
return 0;
|
2011-10-26 04:26:31 +02:00
|
|
|
|
|
|
|
/* Store the link layer address if the appropriate
|
|
|
|
* option is provided. It is considered an error if
|
|
|
|
* the same link layer option is specified twice.
|
|
|
|
*/
|
|
|
|
if (nd_opt->nd_opt_type == ND_OPT_SOURCE_LL_ADDR
|
|
|
|
&& opt_len == 8) {
|
|
|
|
if (unlikely(!is_zero_ether_addr(key->ipv6.nd.sll)))
|
|
|
|
goto invalid;
|
2014-02-18 20:15:45 +01:00
|
|
|
ether_addr_copy(key->ipv6.nd.sll,
|
|
|
|
&nd->opt[offset+sizeof(*nd_opt)]);
|
2011-10-26 04:26:31 +02:00
|
|
|
} else if (nd_opt->nd_opt_type == ND_OPT_TARGET_LL_ADDR
|
|
|
|
&& opt_len == 8) {
|
|
|
|
if (unlikely(!is_zero_ether_addr(key->ipv6.nd.tll)))
|
|
|
|
goto invalid;
|
2014-02-18 20:15:45 +01:00
|
|
|
ether_addr_copy(key->ipv6.nd.tll,
|
|
|
|
&nd->opt[offset+sizeof(*nd_opt)]);
|
2011-10-26 04:26:31 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
icmp_len -= opt_len;
|
|
|
|
offset += opt_len;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2013-08-08 05:01:00 +02:00
|
|
|
return 0;
|
2011-10-26 04:26:31 +02:00
|
|
|
|
|
|
|
invalid:
|
|
|
|
memset(&key->ipv6.nd.target, 0, sizeof(key->ipv6.nd.target));
|
|
|
|
memset(key->ipv6.nd.sll, 0, sizeof(key->ipv6.nd.sll));
|
|
|
|
memset(key->ipv6.nd.tll, 0, sizeof(key->ipv6.nd.tll));
|
|
|
|
|
2013-08-08 05:01:00 +02:00
|
|
|
return 0;
|
2011-10-26 04:26:31 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
2014-09-16 04:20:31 +02:00
|
|
|
* key_extract - extracts a flow key from an Ethernet frame.
|
2011-10-26 04:26:31 +02:00
|
|
|
* @skb: sk_buff that contains the frame, with skb->data pointing to the
|
|
|
|
* Ethernet header
|
|
|
|
* @key: output flow key
|
|
|
|
*
|
|
|
|
* The caller must ensure that skb->len >= ETH_HLEN.
|
|
|
|
*
|
|
|
|
* Returns 0 if successful, otherwise a negative errno value.
|
|
|
|
*
|
2016-11-10 16:28:21 +01:00
|
|
|
* Initializes @skb header fields as follows:
|
2011-10-26 04:26:31 +02:00
|
|
|
*
|
2016-11-10 16:28:21 +01:00
|
|
|
* - skb->mac_header: the L2 header.
|
2011-10-26 04:26:31 +02:00
|
|
|
*
|
2016-11-10 16:28:21 +01:00
|
|
|
* - skb->network_header: just past the L2 header, or just past the
|
|
|
|
* VLAN header, to the first byte of the L2 payload.
|
2011-10-26 04:26:31 +02:00
|
|
|
*
|
2013-06-03 19:01:14 +02:00
|
|
|
* - skb->transport_header: If key->eth.type is ETH_P_IP or ETH_P_IPV6
|
2011-10-26 04:26:31 +02:00
|
|
|
* on output, then just past the IP header, if one is present and
|
|
|
|
* of a correct length, otherwise the same as skb->network_header.
|
2013-06-03 19:01:14 +02:00
|
|
|
* For other key->eth.type values it is left untouched.
|
2016-11-10 16:28:21 +01:00
|
|
|
*
|
|
|
|
* - skb->protocol: the type of the data starting at skb->network_header.
|
|
|
|
* Equals to key->eth.type.
|
2011-10-26 04:26:31 +02:00
|
|
|
*/
|
2014-09-16 04:20:31 +02:00
|
|
|
static int key_extract(struct sk_buff *skb, struct sw_flow_key *key)
|
2011-10-26 04:26:31 +02:00
|
|
|
{
|
2013-08-08 05:01:00 +02:00
|
|
|
int error;
|
2011-10-26 04:26:31 +02:00
|
|
|
struct ethhdr *eth;
|
|
|
|
|
2014-10-04 00:35:33 +02:00
|
|
|
/* Flags are always used as part of stats */
|
|
|
|
key->tp.flags = 0;
|
|
|
|
|
2011-10-26 04:26:31 +02:00
|
|
|
skb_reset_mac_header(skb);
|
|
|
|
|
2016-11-10 16:28:21 +01:00
|
|
|
/* Link layer. */
|
|
|
|
clear_vlan(key);
|
|
|
|
if (key->mac_proto == MAC_PROTO_NONE) {
|
|
|
|
if (unlikely(eth_type_vlan(skb->protocol)))
|
|
|
|
return -EINVAL;
|
2011-10-26 04:26:31 +02:00
|
|
|
|
2016-11-10 16:28:21 +01:00
|
|
|
skb_reset_network_header(skb);
|
|
|
|
} else {
|
|
|
|
eth = eth_hdr(skb);
|
|
|
|
ether_addr_copy(key->eth.src, eth->h_source);
|
|
|
|
ether_addr_copy(key->eth.dst, eth->h_dest);
|
2011-10-26 04:26:31 +02:00
|
|
|
|
2016-11-10 16:28:21 +01:00
|
|
|
__skb_pull(skb, 2 * ETH_ALEN);
|
|
|
|
/* We are going to push all headers that we pull, so no need to
|
|
|
|
* update skb->csum here.
|
|
|
|
*/
|
2011-10-26 04:26:31 +02:00
|
|
|
|
2016-11-10 16:28:21 +01:00
|
|
|
if (unlikely(parse_vlan(skb, key)))
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
skb->protocol = parse_ethertype(skb);
|
|
|
|
if (unlikely(skb->protocol == htons(0)))
|
|
|
|
return -ENOMEM;
|
2011-10-26 04:26:31 +02:00
|
|
|
|
2016-11-10 16:28:21 +01:00
|
|
|
skb_reset_network_header(skb);
|
|
|
|
__skb_push(skb, skb->data - skb_mac_header(skb));
|
|
|
|
}
|
2014-10-06 14:05:13 +02:00
|
|
|
skb_reset_mac_len(skb);
|
2016-11-10 16:28:21 +01:00
|
|
|
key->eth.type = skb->protocol;
|
2011-10-26 04:26:31 +02:00
|
|
|
|
|
|
|
/* Network layer. */
|
|
|
|
if (key->eth.type == htons(ETH_P_IP)) {
|
|
|
|
struct iphdr *nh;
|
|
|
|
__be16 offset;
|
|
|
|
|
|
|
|
error = check_iphdr(skb);
|
|
|
|
if (unlikely(error)) {
|
2014-10-04 00:35:29 +02:00
|
|
|
memset(&key->ip, 0, sizeof(key->ip));
|
|
|
|
memset(&key->ipv4, 0, sizeof(key->ipv4));
|
2011-10-26 04:26:31 +02:00
|
|
|
if (error == -EINVAL) {
|
|
|
|
skb->transport_header = skb->network_header;
|
|
|
|
error = 0;
|
|
|
|
}
|
2013-08-08 05:01:00 +02:00
|
|
|
return error;
|
2011-10-26 04:26:31 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
nh = ip_hdr(skb);
|
|
|
|
key->ipv4.addr.src = nh->saddr;
|
|
|
|
key->ipv4.addr.dst = nh->daddr;
|
|
|
|
|
|
|
|
key->ip.proto = nh->protocol;
|
|
|
|
key->ip.tos = nh->tos;
|
|
|
|
key->ip.ttl = nh->ttl;
|
|
|
|
|
|
|
|
offset = nh->frag_off & htons(IP_OFFSET);
|
|
|
|
if (offset) {
|
|
|
|
key->ip.frag = OVS_FRAG_TYPE_LATER;
|
2013-08-08 05:01:00 +02:00
|
|
|
return 0;
|
2011-10-26 04:26:31 +02:00
|
|
|
}
|
|
|
|
if (nh->frag_off & htons(IP_MF) ||
|
2014-10-04 00:35:29 +02:00
|
|
|
skb_shinfo(skb)->gso_type & SKB_GSO_UDP)
|
2011-10-26 04:26:31 +02:00
|
|
|
key->ip.frag = OVS_FRAG_TYPE_FIRST;
|
2014-10-04 00:35:29 +02:00
|
|
|
else
|
|
|
|
key->ip.frag = OVS_FRAG_TYPE_NONE;
|
2011-10-26 04:26:31 +02:00
|
|
|
|
|
|
|
/* Transport layer. */
|
|
|
|
if (key->ip.proto == IPPROTO_TCP) {
|
|
|
|
if (tcphdr_ok(skb)) {
|
|
|
|
struct tcphdr *tcp = tcp_hdr(skb);
|
2014-05-05 18:54:49 +02:00
|
|
|
key->tp.src = tcp->source;
|
|
|
|
key->tp.dst = tcp->dest;
|
|
|
|
key->tp.flags = TCP_FLAGS_BE16(tcp);
|
2014-10-04 00:35:29 +02:00
|
|
|
} else {
|
|
|
|
memset(&key->tp, 0, sizeof(key->tp));
|
2011-10-26 04:26:31 +02:00
|
|
|
}
|
2014-10-04 00:35:29 +02:00
|
|
|
|
2011-10-26 04:26:31 +02:00
|
|
|
} else if (key->ip.proto == IPPROTO_UDP) {
|
|
|
|
if (udphdr_ok(skb)) {
|
|
|
|
struct udphdr *udp = udp_hdr(skb);
|
2014-05-05 18:54:49 +02:00
|
|
|
key->tp.src = udp->source;
|
|
|
|
key->tp.dst = udp->dest;
|
2014-10-04 00:35:29 +02:00
|
|
|
} else {
|
|
|
|
memset(&key->tp, 0, sizeof(key->tp));
|
2011-10-26 04:26:31 +02:00
|
|
|
}
|
2013-08-22 21:30:48 +02:00
|
|
|
} else if (key->ip.proto == IPPROTO_SCTP) {
|
|
|
|
if (sctphdr_ok(skb)) {
|
|
|
|
struct sctphdr *sctp = sctp_hdr(skb);
|
2014-05-05 18:54:49 +02:00
|
|
|
key->tp.src = sctp->source;
|
|
|
|
key->tp.dst = sctp->dest;
|
2014-10-04 00:35:29 +02:00
|
|
|
} else {
|
|
|
|
memset(&key->tp, 0, sizeof(key->tp));
|
2013-08-22 21:30:48 +02:00
|
|
|
}
|
2011-10-26 04:26:31 +02:00
|
|
|
} else if (key->ip.proto == IPPROTO_ICMP) {
|
|
|
|
if (icmphdr_ok(skb)) {
|
|
|
|
struct icmphdr *icmp = icmp_hdr(skb);
|
|
|
|
/* The ICMP type and code fields use the 16-bit
|
|
|
|
* transport port fields, so we need to store
|
|
|
|
* them in 16-bit network byte order. */
|
2014-05-05 18:54:49 +02:00
|
|
|
key->tp.src = htons(icmp->type);
|
|
|
|
key->tp.dst = htons(icmp->code);
|
2014-10-04 00:35:29 +02:00
|
|
|
} else {
|
|
|
|
memset(&key->tp, 0, sizeof(key->tp));
|
2011-10-26 04:26:31 +02:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-10-04 00:35:29 +02:00
|
|
|
} else if (key->eth.type == htons(ETH_P_ARP) ||
|
|
|
|
key->eth.type == htons(ETH_P_RARP)) {
|
2011-10-26 04:26:31 +02:00
|
|
|
struct arp_eth_header *arp;
|
2014-10-17 08:03:08 +02:00
|
|
|
bool arp_available = arphdr_ok(skb);
|
2011-10-26 04:26:31 +02:00
|
|
|
|
|
|
|
arp = (struct arp_eth_header *)skb_network_header(skb);
|
|
|
|
|
2014-10-17 08:03:08 +02:00
|
|
|
if (arp_available &&
|
2014-10-04 00:35:29 +02:00
|
|
|
arp->ar_hrd == htons(ARPHRD_ETHER) &&
|
|
|
|
arp->ar_pro == htons(ETH_P_IP) &&
|
|
|
|
arp->ar_hln == ETH_ALEN &&
|
|
|
|
arp->ar_pln == 4) {
|
2011-10-26 04:26:31 +02:00
|
|
|
|
|
|
|
/* We only match on the lower 8 bits of the opcode. */
|
|
|
|
if (ntohs(arp->ar_op) <= 0xff)
|
|
|
|
key->ip.proto = ntohs(arp->ar_op);
|
2014-10-04 00:35:29 +02:00
|
|
|
else
|
|
|
|
key->ip.proto = 0;
|
|
|
|
|
2012-10-30 23:50:28 +01:00
|
|
|
memcpy(&key->ipv4.addr.src, arp->ar_sip, sizeof(key->ipv4.addr.src));
|
|
|
|
memcpy(&key->ipv4.addr.dst, arp->ar_tip, sizeof(key->ipv4.addr.dst));
|
2014-02-18 20:15:45 +01:00
|
|
|
ether_addr_copy(key->ipv4.arp.sha, arp->ar_sha);
|
|
|
|
ether_addr_copy(key->ipv4.arp.tha, arp->ar_tha);
|
2014-10-04 00:35:29 +02:00
|
|
|
} else {
|
|
|
|
memset(&key->ip, 0, sizeof(key->ip));
|
|
|
|
memset(&key->ipv4, 0, sizeof(key->ipv4));
|
2011-10-26 04:26:31 +02:00
|
|
|
}
|
2014-10-06 14:05:13 +02:00
|
|
|
} else if (eth_p_mpls(key->eth.type)) {
|
|
|
|
size_t stack_len = MPLS_HLEN;
|
|
|
|
|
2016-09-30 19:08:05 +02:00
|
|
|
skb_set_inner_network_header(skb, skb->mac_len);
|
2014-10-06 14:05:13 +02:00
|
|
|
while (1) {
|
|
|
|
__be32 lse;
|
|
|
|
|
|
|
|
error = check_header(skb, skb->mac_len + stack_len);
|
|
|
|
if (unlikely(error))
|
|
|
|
return 0;
|
|
|
|
|
2016-09-30 19:08:05 +02:00
|
|
|
memcpy(&lse, skb_inner_network_header(skb), MPLS_HLEN);
|
2014-10-06 14:05:13 +02:00
|
|
|
|
|
|
|
if (stack_len == MPLS_HLEN)
|
|
|
|
memcpy(&key->mpls.top_lse, &lse, MPLS_HLEN);
|
|
|
|
|
2016-09-30 19:08:05 +02:00
|
|
|
skb_set_inner_network_header(skb, skb->mac_len + stack_len);
|
2014-10-06 14:05:13 +02:00
|
|
|
if (lse & htonl(MPLS_LS_S_MASK))
|
|
|
|
break;
|
|
|
|
|
|
|
|
stack_len += MPLS_HLEN;
|
|
|
|
}
|
2011-10-26 04:26:31 +02:00
|
|
|
} else if (key->eth.type == htons(ETH_P_IPV6)) {
|
|
|
|
int nh_len; /* IPv6 Header + Extensions */
|
|
|
|
|
2013-08-08 05:01:00 +02:00
|
|
|
nh_len = parse_ipv6hdr(skb, key);
|
2011-10-26 04:26:31 +02:00
|
|
|
if (unlikely(nh_len < 0)) {
|
2015-08-29 02:02:21 +02:00
|
|
|
switch (nh_len) {
|
|
|
|
case -EINVAL:
|
|
|
|
memset(&key->ip, 0, sizeof(key->ip));
|
|
|
|
memset(&key->ipv6.addr, 0, sizeof(key->ipv6.addr));
|
|
|
|
/* fall-through */
|
|
|
|
case -EPROTO:
|
2011-10-26 04:26:31 +02:00
|
|
|
skb->transport_header = skb->network_header;
|
2013-08-08 05:01:00 +02:00
|
|
|
error = 0;
|
2015-08-29 02:02:21 +02:00
|
|
|
break;
|
|
|
|
default:
|
2011-10-26 04:26:31 +02:00
|
|
|
error = nh_len;
|
2013-08-08 05:01:00 +02:00
|
|
|
}
|
|
|
|
return error;
|
2011-10-26 04:26:31 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
if (key->ip.frag == OVS_FRAG_TYPE_LATER)
|
2013-08-08 05:01:00 +02:00
|
|
|
return 0;
|
2011-10-26 04:26:31 +02:00
|
|
|
if (skb_shinfo(skb)->gso_type & SKB_GSO_UDP)
|
|
|
|
key->ip.frag = OVS_FRAG_TYPE_FIRST;
|
|
|
|
|
|
|
|
/* Transport layer. */
|
|
|
|
if (key->ip.proto == NEXTHDR_TCP) {
|
|
|
|
if (tcphdr_ok(skb)) {
|
|
|
|
struct tcphdr *tcp = tcp_hdr(skb);
|
2014-05-05 18:54:49 +02:00
|
|
|
key->tp.src = tcp->source;
|
|
|
|
key->tp.dst = tcp->dest;
|
|
|
|
key->tp.flags = TCP_FLAGS_BE16(tcp);
|
2014-10-04 00:35:29 +02:00
|
|
|
} else {
|
|
|
|
memset(&key->tp, 0, sizeof(key->tp));
|
2011-10-26 04:26:31 +02:00
|
|
|
}
|
|
|
|
} else if (key->ip.proto == NEXTHDR_UDP) {
|
|
|
|
if (udphdr_ok(skb)) {
|
|
|
|
struct udphdr *udp = udp_hdr(skb);
|
2014-05-05 18:54:49 +02:00
|
|
|
key->tp.src = udp->source;
|
|
|
|
key->tp.dst = udp->dest;
|
2014-10-04 00:35:29 +02:00
|
|
|
} else {
|
|
|
|
memset(&key->tp, 0, sizeof(key->tp));
|
2011-10-26 04:26:31 +02:00
|
|
|
}
|
2013-08-22 21:30:48 +02:00
|
|
|
} else if (key->ip.proto == NEXTHDR_SCTP) {
|
|
|
|
if (sctphdr_ok(skb)) {
|
|
|
|
struct sctphdr *sctp = sctp_hdr(skb);
|
2014-05-05 18:54:49 +02:00
|
|
|
key->tp.src = sctp->source;
|
|
|
|
key->tp.dst = sctp->dest;
|
2014-10-04 00:35:29 +02:00
|
|
|
} else {
|
|
|
|
memset(&key->tp, 0, sizeof(key->tp));
|
2013-08-22 21:30:48 +02:00
|
|
|
}
|
2011-10-26 04:26:31 +02:00
|
|
|
} else if (key->ip.proto == NEXTHDR_ICMP) {
|
|
|
|
if (icmp6hdr_ok(skb)) {
|
2013-08-08 05:01:00 +02:00
|
|
|
error = parse_icmpv6(skb, key, nh_len);
|
|
|
|
if (error)
|
|
|
|
return error;
|
2014-10-04 00:35:29 +02:00
|
|
|
} else {
|
|
|
|
memset(&key->tp, 0, sizeof(key->tp));
|
2011-10-26 04:26:31 +02:00
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
2013-08-08 05:01:00 +02:00
|
|
|
return 0;
|
2011-10-26 04:26:31 +02:00
|
|
|
}
|
2014-09-16 04:20:31 +02:00
|
|
|
|
2014-09-16 04:37:25 +02:00
|
|
|
int ovs_flow_key_update(struct sk_buff *skb, struct sw_flow_key *key)
|
|
|
|
{
|
|
|
|
return key_extract(skb, key);
|
|
|
|
}
|
|
|
|
|
2016-11-10 16:28:21 +01:00
|
|
|
static int key_extract_mac_proto(struct sk_buff *skb)
|
|
|
|
{
|
|
|
|
switch (skb->dev->type) {
|
|
|
|
case ARPHRD_ETHER:
|
|
|
|
return MAC_PROTO_ETHERNET;
|
|
|
|
case ARPHRD_NONE:
|
|
|
|
if (skb->protocol == htons(ETH_P_TEB))
|
|
|
|
return MAC_PROTO_ETHERNET;
|
|
|
|
return MAC_PROTO_NONE;
|
|
|
|
}
|
|
|
|
WARN_ON_ONCE(1);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
2015-07-21 10:43:54 +02:00
|
|
|
int ovs_flow_key_extract(const struct ip_tunnel_info *tun_info,
|
2014-09-16 04:28:44 +02:00
|
|
|
struct sk_buff *skb, struct sw_flow_key *key)
|
2014-09-16 04:20:31 +02:00
|
|
|
{
|
2016-11-10 16:28:21 +01:00
|
|
|
int res;
|
|
|
|
|
2014-09-16 04:20:31 +02:00
|
|
|
/* Extract metadata from packet. */
|
2014-10-04 00:35:33 +02:00
|
|
|
if (tun_info) {
|
2015-10-05 13:09:46 +02:00
|
|
|
key->tun_proto = ip_tunnel_info_af(tun_info);
|
2015-07-21 10:43:54 +02:00
|
|
|
memcpy(&key->tun_key, &tun_info->key, sizeof(key->tun_key));
|
2014-10-04 00:35:33 +02:00
|
|
|
|
2015-08-31 03:09:38 +02:00
|
|
|
if (tun_info->options_len) {
|
2014-10-04 00:35:33 +02:00
|
|
|
BUILD_BUG_ON((1 << (sizeof(tun_info->options_len) *
|
|
|
|
8)) - 1
|
|
|
|
> sizeof(key->tun_opts));
|
2015-08-31 03:09:38 +02:00
|
|
|
|
|
|
|
ip_tunnel_info_opts_get(TUN_METADATA_OPTS(key, tun_info->options_len),
|
|
|
|
tun_info);
|
2014-10-04 00:35:33 +02:00
|
|
|
key->tun_opts_len = tun_info->options_len;
|
|
|
|
} else {
|
|
|
|
key->tun_opts_len = 0;
|
|
|
|
}
|
|
|
|
} else {
|
2015-10-05 13:09:46 +02:00
|
|
|
key->tun_proto = 0;
|
2014-10-04 00:35:33 +02:00
|
|
|
key->tun_opts_len = 0;
|
2014-10-04 00:35:29 +02:00
|
|
|
memset(&key->tun_key, 0, sizeof(key->tun_key));
|
2014-10-04 00:35:33 +02:00
|
|
|
}
|
2014-09-16 04:20:31 +02:00
|
|
|
|
|
|
|
key->phy.priority = skb->priority;
|
|
|
|
key->phy.in_port = OVS_CB(skb)->input_vport->port_no;
|
|
|
|
key->phy.skb_mark = skb->mark;
|
2015-08-26 20:31:48 +02:00
|
|
|
ovs_ct_fill_key(skb, key);
|
2014-10-04 00:35:29 +02:00
|
|
|
key->ovs_flow_hash = 0;
|
2016-11-10 16:28:21 +01:00
|
|
|
res = key_extract_mac_proto(skb);
|
|
|
|
if (res < 0)
|
|
|
|
return res;
|
|
|
|
key->mac_proto = res;
|
2014-10-04 00:35:29 +02:00
|
|
|
key->recirc_id = 0;
|
|
|
|
|
2014-09-16 04:20:31 +02:00
|
|
|
return key_extract(skb, key);
|
|
|
|
}
|
|
|
|
|
2015-08-26 20:31:52 +02:00
|
|
|
int ovs_flow_key_extract_userspace(struct net *net, const struct nlattr *attr,
|
2014-09-16 04:20:31 +02:00
|
|
|
struct sk_buff *skb,
|
2014-11-06 16:03:05 +01:00
|
|
|
struct sw_flow_key *key, bool log)
|
2014-09-16 04:20:31 +02:00
|
|
|
{
|
|
|
|
int err;
|
|
|
|
|
|
|
|
/* Extract metadata from netlink attributes. */
|
2015-08-26 20:31:52 +02:00
|
|
|
err = ovs_nla_get_flow_metadata(net, attr, key, log);
|
2014-09-16 04:20:31 +02:00
|
|
|
if (err)
|
|
|
|
return err;
|
|
|
|
|
2016-11-10 16:28:21 +01:00
|
|
|
if (ovs_key_mac_proto(key) == MAC_PROTO_NONE) {
|
|
|
|
/* key_extract assumes that skb->protocol is set-up for
|
|
|
|
* layer 3 packets which is the case for other callers,
|
|
|
|
* in particular packets recieved from the network stack.
|
|
|
|
* Here the correct value can be set from the metadata
|
|
|
|
* extracted above.
|
|
|
|
*/
|
|
|
|
skb->protocol = key->eth.type;
|
|
|
|
} else {
|
|
|
|
struct ethhdr *eth;
|
|
|
|
|
|
|
|
skb_reset_mac_header(skb);
|
|
|
|
eth = eth_hdr(skb);
|
|
|
|
|
|
|
|
/* Normally, setting the skb 'protocol' field would be
|
|
|
|
* handled by a call to eth_type_trans(), but it assumes
|
|
|
|
* there's a sending device, which we may not have.
|
|
|
|
*/
|
|
|
|
if (eth_proto_is_802_3(eth->h_proto))
|
|
|
|
skb->protocol = eth->h_proto;
|
|
|
|
else
|
|
|
|
skb->protocol = htons(ETH_P_802_2);
|
|
|
|
}
|
|
|
|
|
2014-09-16 04:20:31 +02:00
|
|
|
return key_extract(skb, key);
|
|
|
|
}
|