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Make get/set_affinity visible again and export functions in the OpenMP blas server too #5951

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Merged
martin-frbg merged 2 commits into from
Jul 29, 2026
+6 −3
Merged

Make get/set_affinity visible again and export functions in the OpenMP blas server too #5951

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4230fe4
Tag openblas_set_num_threads and get/set_affinity with OPENBLAS_EXPORT
martin-frbg Jul 28, 2026
28e75a8
Tag get/set_affinity with OPENBLAS_EXPORT
martin-frbg Jul 28, 2026
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5 changes: 3 additions & 2 deletions driver/others/blas_server.c
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Original file line number Diff line number Diff line change
Expand Up @@ -335,7 +335,7 @@ static void legacy_exec(void *func, int mode, blas_arg_t *args, void *sb){
}
}

#if defined(OS_LINUX) && !defined(NO_AFFINITY)
#if defined(OS_LINUX) && !defined(NO_AFFINITY)
int gotoblas_set_affinity(int);
int gotoblas_set_affinity2(int);
int get_node(void);
Expand All @@ -345,7 +345,7 @@ static int increased_threads = 0;

#ifdef OS_LINUX
extern int openblas_get_num_threads(void);

OPENBLAS_EXPORT
int openblas_setaffinity(int thread_idx, size_t cpusetsize, cpu_set_t* cpu_set) {
const int active_threads = openblas_get_num_threads();

Expand All @@ -360,6 +360,7 @@ int openblas_setaffinity(int thread_idx, size_t cpusetsize, cpu_set_t* cpu_set)

return pthread_setaffinity_np(thread, cpusetsize, cpu_set);
}
OPENBLAS_EXPORT
int openblas_getaffinity(int thread_idx, size_t cpusetsize, cpu_set_t* cpu_set) {
const int active_threads = openblas_get_num_threads();

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4 changes: 3 additions & 1 deletion driver/others/blas_server_omp.c
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Expand Up @@ -118,17 +118,19 @@ void goto_set_num_threads(int num_threads) {
#endif

}
OPENBLAS_EXPORT
void openblas_set_num_threads(int num_threads) {
blas_is_num_threads_set_explicitly = 1;
goto_set_num_threads(num_threads);
}

#ifdef OS_LINUX

OPENBLAS_EXPORT
int openblas_setaffinity(int thread_idx, size_t cpusetsize, cpu_set_t* cpu_set) {
fprintf(stderr,"OpenBLAS: use OpenMP environment variables for setting cpu affinity\n");
return -1;
}
OPENBLAS_EXPORT
int openblas_getaffinity(int thread_idx, size_t cpusetsize, cpu_set_t* cpu_set) {
fprintf(stderr,"OpenBLAS: use OpenMP environment variables for querying cpu affinity\n");
return -1;
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