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Honor cgroup/cpuset limits when enumerating cpus

This commit is contained in:
Martin Kroeker 2017-07-25 22:47:34 +02:00 committed by GitHub
parent 480e697681
commit c4af196a2d
2 changed files with 82 additions and 2 deletions
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47
driver/others/init.c
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@ -826,15 +826,58 @@ void gotoblas_affinity_init(void) {
common -> shmid = pshmid;
if (common -> magic != SH_MAGIC) {
cpu_set_t *cpusetp;
int nums;
int ret;
#ifdef DEBUG
fprintf(stderr, "Shared Memory Initialization.\n");
#endif
//returns the number of processors which are currently online
common -> num_procs = sysconf(_SC_NPROCESSORS_CONF);;
nums = sysconf(_SC_NPROCESSORS_CONF);
#if !defined(__GLIBC_PREREQ)
common->num_procs = nums;
#else
#if !__GLIBC_PREREQ(2, 3)
common->num_procs = nums;
#elif __GLIBC_PREREQ(2, 7)
cpusetp = CPU_ALLOC(nums);
if (cpusetp == NULL) {
common->num_procs = nums;
} else {
size_t size;
size = CPU_ALLOC_SIZE(nums);
ret = sched_getaffinity(0,size,cpusetp);
if (ret!=0)
common->num_procs = nums;
else
common->num_procs = CPU_COUNT_S(size,cpusetp);
}
CPU_FREE(cpusetp);
#else
ret = sched_getaffinity(0,sizeof(cpu_set_t), cpusetp);
if (ret!=0) {
common->num_procs = nums;
} else {
#if !__GLIBC_PREREQ(2, 6)
int i;
int n = 0;
for (i=0;i<nums;i++)
if (CPU_ISSET(i,cpusetp)) n++;
common->num_procs = n;
}
#else
common->num_procs = CPU_COUNT(sizeof(cpu_set_t),cpusetp);
#endif
#endif
#endif
if(common -> num_procs > MAX_CPUS) {
fprintf(stderr, "\nOpenBLAS Warining : The number of CPU/Cores(%d) is beyond the limit(%d). Terminated.\n", common->num_procs, MAX_CPUS);
fprintf(stderr, "\nOpenBLAS Warning : The number of CPU/Cores(%d) is beyond the limit(%d). Terminated.\n", common->num_procs, MAX_CPUS);
exit(1);
}

37
driver/others/memory.c
View File

@ -175,7 +175,44 @@ int get_num_procs(void);
#else
int get_num_procs(void) {
static int nums = 0;
cpu_set_t *cpusetp;
size_t size;
int ret;
int i,n;
if (!nums) nums = sysconf(_SC_NPROCESSORS_CONF);
#if !defined(OS_LINUX)
return nums;
#endif
#if !defined(__GLIBC_PREREQ)
return nums;
#endif
#if !__GLIBC_PREREQ(2, 3)
return nums;
#endif
#if !__GLIBC_PREREQ(2, 7)
ret = sched_getaffinity(0,sizeof(cpu_set_t), cpusetp);
if (ret!=0) return nums;
n=0;
#if !__GLIBC_PREREQ(2, 6)
for (i=0;i<nums;i++)
if (CPU_ISSET(i,cpusetp)) n++;
nums=n;
#else
nums = CPU_COUNT(sizeof(cpu_set_t),cpusetp);
#endif
return nums;
#endif
cpusetp = CPU_ALLOC(nums);
if (cpusetp == NULL) return nums;
size = CPU_ALLOC_SIZE(nums);
ret = sched_getaffinity(0,size,cpusetp);
if (ret!=0) return nums;
nums = CPU_COUNT_S(size,cpusetp);
CPU_FREE(cpusetp);
return nums;
}
#endif