Guard against system call returning zero processors
@@ -877,21 +877,21 @@ void gotoblas_affinity_init(void) {
nums = sysconf(_SC_NPROCESSORS_CONF);
#if !defined(__GLIBC_PREREQ)
- common->num_procs = nums;
+ common->num_procs = nums >0 ? nums : 2;
#else
#if !__GLIBC_PREREQ(2, 3)
- common->num_procs = nums;
+ common->num_procs = nums >0 ? nums : 2;
#elif __GLIBC_PREREQ(2, 7)
- cpusetp = CPU_ALLOC(nums);
+ cpusetp = CPU_ALLOC(nums>0? nums:1024);
if (cpusetp == NULL) {
- common->num_procs = nums;
+ common->num_procs = nums>0 ? nums: 2;
} else {
size_t size;
- size = CPU_ALLOC_SIZE(nums);
+ size = CPU_ALLOC_SIZE(nums>0? nums: 1024);
ret = sched_getaffinity(0,size,cpusetp);
if (ret!=0)
- common->num_procs = nums;
+ common->num_procs = nums >0 ? nums : 1;
else
common->num_procs = CPU_COUNT_S(size,cpusetp);
}
@@ -899,12 +899,12 @@ void gotoblas_affinity_init(void) {
#else
ret = sched_getaffinity(0,sizeof(cpu_set_t), &cpuset);
if (ret!=0) {
- common->num_procs = nums;
+ common->num_procs = nums >0 ? nums : 2;
} else {
#if !__GLIBC_PREREQ(2, 6)
int i;
int n = 0;
- for (i=0;i<nums;i++)
+ for (i=0;i<(nums >0 ?nums:1024) ;i++)
if (CPU_ISSET(i,&cpuset)) n++;
common->num_procs = n;
}
@@ -1022,7 +1022,7 @@ void gotoblas_set_affinity2(int threads) {};
void gotoblas_affinity_reschedule(void) {};
-int get_num_procs(void) { return sysconf(_SC_NPROCESSORS_CONF); }
+int get_num_procs(void) { int num = sysconf(_SC_NPROCESSORS_CONF); return (nums >0 ? nums : 2); }
int get_num_nodes(void) { return 1; }
