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/*
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*
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* Copyright 2016, Google Inc.
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* All rights reserved.
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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 are
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* 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
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* copyright notice, this list of conditions and the following disclaimer
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* in the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Google Inc. nor the names of its
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* contributors may be used to endorse or promote products derived from
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* 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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#include "test/cpp/qps/limit_cores.h"
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#include <grpc/support/cpu.h>
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#include <grpc/support/log.h>
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#include <grpc/support/port_platform.h>
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#ifdef GPR_CPU_LINUX
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#ifndef _GNU_SOURCE
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#define _GNU_SOURCE
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#endif
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#include <sched.h>
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namespace grpc {
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namespace testing {
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int LimitCores(const int* cores, int cores_size) {
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const int num_cores = gpr_cpu_num_cores();
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int cores_set = 0;
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cpu_set_t* cpup = CPU_ALLOC(num_cores);
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GPR_ASSERT(cpup);
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const size_t size = CPU_ALLOC_SIZE(num_cores);
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CPU_ZERO_S(size, cpup);
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if (cores_size > 0) {
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for (int i = 0; i < cores_size; i++) {
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if (cores[i] < num_cores) {
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CPU_SET_S(cores[i], size, cpup);
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cores_set++;
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}
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}
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} else {
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for (int i = 0; i < num_cores; i++) {
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CPU_SET_S(i, size, cpup);
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cores_set++;
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}
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}
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GPR_ASSERT(sched_setaffinity(0, size, cpup) == 0);
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CPU_FREE(cpup);
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return cores_set;
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}
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} // namespace testing
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} // namespace grpc
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#else
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namespace grpc {
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namespace testing {
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// LimitCores is not currently supported for non-Linux platforms
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int LimitCores(const int*, int) { return gpr_cpu_num_cores(); }
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} // namespace testing
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} // namespace grpc
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#endif
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