linux/include
Eric Dumazet 28d6427109 net: attempt high order allocations in sock_alloc_send_pskb()
Adding paged frags skbs to af_unix sockets introduced a performance
regression on large sends because of additional page allocations, even
if each skb could carry at least 100% more payload than before.

We can instruct sock_alloc_send_pskb() to attempt high order
allocations.

Most of the time, it does a single page allocation instead of 8.

I added an additional parameter to sock_alloc_send_pskb() to
let other users to opt-in for this new feature on followup patches.

Tested:

Before patch :

$ netperf -t STREAM_STREAM
STREAM STREAM TEST
Recv   Send    Send
Socket Socket  Message  Elapsed
Size   Size    Size     Time     Throughput
bytes  bytes   bytes    secs.    10^6bits/sec

 2304  212992  212992    10.00    46861.15

After patch :

$ netperf -t STREAM_STREAM
STREAM STREAM TEST
Recv   Send    Send
Socket Socket  Message  Elapsed
Size   Size    Size     Time     Throughput
bytes  bytes   bytes    secs.    10^6bits/sec

 2304  212992  212992    10.00    57981.11

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: David Rientjes <rientjes@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-08-10 01:16:44 -07:00
..
acpi Revert "ACPI / video / i915: No ACPI backlight if firmware expects Windows 8" 2013-07-26 14:59:20 +02:00
asm-generic
clocksource
crypto
drm drm: fix 64 bit drm fixed point helpers 2013-07-30 17:24:13 -04:00
dt-bindings Pin control fixes for the v3.11 series: 2013-07-28 18:19:27 -07:00
keys
kvm
linux net: igmp: Allow user-space configuration of igmp unsolicited report interval 2013-08-09 11:27:46 -07:00
math-emu
media include: Convert ethernet mac address declarations to use ETH_ALEN 2013-08-02 12:33:54 -07:00
memory
misc
net net: attempt high order allocations in sock_alloc_send_pskb() 2013-08-10 01:16:44 -07:00
pcmcia
ras
rdma
rxrpc
scsi
sound
target
trace This contains fixes, optimizations and some clean ups 2013-07-22 19:07:24 -07:00
uapi net: add SNMP counters tracking incoming ECN bits 2013-08-08 22:24:59 -07:00
video
xen Merge branch 'for-3.11/drivers' of git://git.kernel.dk/linux-block 2013-07-22 19:02:52 -07:00
Kbuild