5d18ee67d4
Currently the driver doesn't support completion vectors. These
are used to indicate which sets of CQs should be grouped together
into the same vector. A vector is a CQ processing thread that
runs on a specific CPU.
If an application has several CQs bound to different completion
vectors, and each completion vector runs on different CPUs, then
the completion queue workload is balanced. This helps scale as more
nodes are used.
Implement CQ completion vector support using a global workqueue
where a CQ entry is queued to the CPU corresponding to the CQ's
completion vector. Since the workqueue is global, it's guaranteed
to always be there when queueing CQ entries; Therefore, the RCU
locking for cq->rdi->worker in the hot path is superfluous.
Each completion vector is assigned to a different CPU. The number of
completion vectors available is computed by taking the number of
online, physical CPUs from the local NUMA node and subtracting the
CPUs used for kernel receive queues and the general interrupt.
Special use cases:
* If there are no CPUs left for completion vectors, the same CPU
for the general interrupt is used; Therefore, there would only
be one completion vector available.
* For multi-HFI systems, the number of completion vectors available
for each device is the total number of completion vectors in
the local NUMA node divided by the number of devices in the same
NUMA node. If there's a division remainder, the first device to
get initialized gets an extra completion vector.
Upon a CQ creation, an invalid completion vector could be specified.
Handle it as follows:
* If the completion vector is less than 0, set it to 0.
* Set the completion vector to the result of the passed completion
vector moded with the number of device completion vectors
available.
Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Sebastian Sanchez <sebastian.sanchez@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
157 lines
4.9 KiB
C
157 lines
4.9 KiB
C
/*
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* Copyright(c) 2015 - 2018 Intel Corporation.
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*
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* This file is provided under a dual BSD/GPLv2 license. When using or
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* redistributing this file, you may do so under either license.
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*
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* GPL LICENSE SUMMARY
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* 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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* BSD LICENSE
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* - Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#if !defined(__HFI1_TRACE_EXTRA_H) || defined(TRACE_HEADER_MULTI_READ)
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#define __HFI1_TRACE_EXTRA_H
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#include <linux/tracepoint.h>
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#include <linux/trace_seq.h>
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#include "hfi.h"
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/*
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* Note:
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* This produces a REALLY ugly trace in the console output when the string is
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* too long.
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*/
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#undef TRACE_SYSTEM
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#define TRACE_SYSTEM hfi1_dbg
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#define MAX_MSG_LEN 512
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DECLARE_EVENT_CLASS(hfi1_trace_template,
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TP_PROTO(const char *function, struct va_format *vaf),
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TP_ARGS(function, vaf),
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TP_STRUCT__entry(__string(function, function)
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__dynamic_array(char, msg, MAX_MSG_LEN)
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),
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TP_fast_assign(__assign_str(function, function);
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WARN_ON_ONCE(vsnprintf
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(__get_dynamic_array(msg),
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MAX_MSG_LEN, vaf->fmt,
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*vaf->va) >=
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MAX_MSG_LEN);
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),
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TP_printk("(%s) %s",
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__get_str(function),
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__get_str(msg))
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);
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/*
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* It may be nice to macroize the __hfi1_trace but the va_* stuff requires an
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* actual function to work and can not be in a macro.
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*/
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#define __hfi1_trace_def(lvl) \
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void __hfi1_trace_##lvl(const char *funct, char *fmt, ...); \
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\
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DEFINE_EVENT(hfi1_trace_template, hfi1_ ##lvl, \
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TP_PROTO(const char *function, struct va_format *vaf), \
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TP_ARGS(function, vaf))
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#define __hfi1_trace_fn(lvl) \
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void __hfi1_trace_##lvl(const char *func, char *fmt, ...) \
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{ \
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struct va_format vaf = { \
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.fmt = fmt, \
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}; \
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va_list args; \
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\
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va_start(args, fmt); \
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vaf.va = &args; \
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trace_hfi1_ ##lvl(func, &vaf); \
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va_end(args); \
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return; \
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}
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/*
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* To create a new trace level simply define it below and as a __hfi1_trace_fn
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* in trace.c. This will create all the hooks for calling
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* hfi1_cdbg(LVL, fmt, ...); as well as take care of all
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* the debugfs stuff.
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*/
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__hfi1_trace_def(AFFINITY);
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__hfi1_trace_def(PKT);
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__hfi1_trace_def(PROC);
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__hfi1_trace_def(SDMA);
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__hfi1_trace_def(LINKVERB);
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__hfi1_trace_def(DEBUG);
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__hfi1_trace_def(SNOOP);
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__hfi1_trace_def(CNTR);
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__hfi1_trace_def(PIO);
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__hfi1_trace_def(DC8051);
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__hfi1_trace_def(FIRMWARE);
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__hfi1_trace_def(RCVCTRL);
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__hfi1_trace_def(TID);
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__hfi1_trace_def(MMU);
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__hfi1_trace_def(IOCTL);
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#define hfi1_cdbg(which, fmt, ...) \
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__hfi1_trace_##which(__func__, fmt, ##__VA_ARGS__)
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#define hfi1_dbg(fmt, ...) \
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hfi1_cdbg(DEBUG, fmt, ##__VA_ARGS__)
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/*
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* Define HFI1_EARLY_DBG at compile time or here to enable early trace
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* messages. Do not check in an enablement for this.
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*/
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#ifdef HFI1_EARLY_DBG
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#define hfi1_dbg_early(fmt, ...) \
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trace_printk(fmt, ##__VA_ARGS__)
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#else
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#define hfi1_dbg_early(fmt, ...)
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#endif
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#endif /* __HFI1_TRACE_EXTRA_H */
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#undef TRACE_INCLUDE_PATH
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#undef TRACE_INCLUDE_FILE
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#define TRACE_INCLUDE_PATH .
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#define TRACE_INCLUDE_FILE trace_dbg
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#include <trace/define_trace.h>
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