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[WIP] Actually terminate OpenBLAS when running out of thread buffers #5963

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[WIP] Actually terminate OpenBLAS when running out of thread buffers #5963

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6a3b0ed
Call xerbla on buffer overrun instead of returning a NULL handle
martin-frbg Aug 5, 2026
b3e0123
Add special (terminating) info code 999 to the default xerbla
martin-frbg Aug 5, 2026
bce0b00
typo
martin-frbg Aug 6, 2026
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5 changes: 3 additions & 2 deletions driver/others/memory.c
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Original file line number Diff line number Diff line change
Expand Up @@ -2765,7 +2765,7 @@ static int memory_overflowed = 0;
void *blas_memory_alloc(int procpos){

int i;

int buffer_fault = 999;
int position;
#if defined(WHEREAMI) && !defined(USE_OPENMP)
int mypos = 0;
Expand Down Expand Up @@ -3163,7 +3163,8 @@ void *blas_memory_alloc(int procpos){
printf("a sufficiently small number. This error typically occurs when the software that relies on\n");
printf("OpenBLAS calls BLAS functions from many threads in parallel, or when your computer has more\n");
printf("cpu cores than what OpenBLAS was configured to handle.\n");
return NULL;
BLASFUNC(xerbla)("OpenBLAS",&buffer_fault,8);
return NULL;
}

void blas_memory_free(void *free_area){
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6 changes: 5 additions & 1 deletion driver/others/xerbla.c
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Expand Up @@ -65,7 +65,11 @@ static size_t openblas_xerbla_name_length(const char *message,
static void openblas_xerbla_default(const char *message, const blasint *info,
size_t length) {
int precision = length > INT_MAX ? INT_MAX : (int)length;


if (*info == 999) {
printf(" ** OpenBLAS ran out of thread buffers - terminating\n");
exit(1);
}
printf(MSGFMT, precision, message == NULL ? "" : message,
(long long)*info);
}
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