64 lines
1.3 KiB
C
64 lines
1.3 KiB
C
/*
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* Copyright (C) 2022 NHR@FAU, University Erlangen-Nuremberg.
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* All rights reserved.
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* Use of this source code is governed by a MIT-style
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* license that can be found in the LICENSE file.
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*/
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#ifdef __linux__
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#ifdef _OPENMP
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#include <stdlib.h>
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#include <stdio.h>
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#include <sched.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <pthread.h>
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#include <sys/syscall.h>
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#define MAX_NUM_THREADS 128
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#define gettid() syscall(SYS_gettid)
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static int getProcessorID(cpu_set_t* cpu_set)
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{
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int processorId;
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for ( processorId = 0; processorId < MAX_NUM_THREADS; processorId++ )
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{
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if ( CPU_ISSET(processorId,cpu_set) )
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{
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break;
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}
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}
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return processorId;
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}
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int affinity_getProcessorId()
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{
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cpu_set_t cpu_set;
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CPU_ZERO(&cpu_set);
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sched_getaffinity(gettid(),sizeof(cpu_set_t), &cpu_set);
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return getProcessorID(&cpu_set);
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}
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void affinity_pinThread(int processorId)
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{
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cpu_set_t cpuset;
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pthread_t thread;
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thread = pthread_self();
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CPU_ZERO(&cpuset);
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CPU_SET(processorId, &cpuset);
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pthread_setaffinity_np(thread, sizeof(cpu_set_t), &cpuset);
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}
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void affinity_pinProcess(int processorId)
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{
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cpu_set_t cpuset;
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CPU_ZERO(&cpuset);
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CPU_SET(processorId, &cpuset);
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sched_setaffinity(0, sizeof(cpu_set_t), &cpuset);
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}
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#endif /*_OPENMP*/
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#endif /*__linux__*/
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