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/*
*
* Copyright 2016, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include "test/cpp/qps/limit_cores.h"
#include <grpc/support/cpu.h>
#include <grpc/support/log.h>
#include <grpc/support/port_platform.h>
namespace grpc {
namespace testing {
#ifdef GPR_CPU_LINUX
#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif
#include <sched.h>
int LimitCores(const int* cores, int cores_size) {
const int num_cores = gpr_cpu_num_cores();
int cores_set = 0;
cpu_set_t* cpup = CPU_ALLOC(num_cores);
GPR_ASSERT(cpup);
const size_t size = CPU_ALLOC_SIZE(num_cores);
CPU_ZERO_S(size, cpup);
if (cores_size > 0) {
for (int i = 0; i < cores_size; i++) {
if (cores[i] < num_cores) {
CPU_SET_S(cores[i], size, cpup);
cores_set++;
}
}
} else {
for (int i = 0; i < num_cores; i++) {
CPU_SET_S(i, size, cpup);
cores_set++;
}
}
GPR_ASSERT(sched_setaffinity(0, size, cpup) == 0);
CPU_FREE(cpup);
return cores_set;
}
#else
// LimitCores is not currently supported for non-Linux platforms
int LimitCores(const int*, int) { return gpr_cpu_num_cores(); }
#endif
} // namespace testing
} // namespace grpc
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