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Merged
martin-frbg merged 1 commit into from
Mar 23, 2026
Merged

Improve error message displayed when running out of buffers #5698

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17 changes: 15 additions & 2 deletions driver/others/memory.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1317,7 +1317,11 @@ UNLOCK_COMMAND(&alloc_lock);
error:
printf("OpenBLAS : Program will terminate because you tried to allocate too many TLS memory regions.\n");
printf("This library was built to support a maximum of %d threads - either rebuild OpenBLAS\n", NUM_BUFFERS);
printf("with a larger NUM_THREADS value or set the environment variable OPENBLAS_NUM_THREADS to\n");
#ifdef USE_OPENMP
printf("with a larger NUM_THREADS value or set the environment variable OMP_NUM_THREADS to\n");
#else
printf("with a larger NUM_THREADS value or set the environment variable OPENBLAS_NUM_THREADS to\n");
#endif
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");
Expand Down Expand Up @@ -3039,8 +3043,13 @@ void *blas_memory_alloc(int procpos){
#endif
if (memory_overflowed) goto terminate;
fprintf(stderr,"OpenBLAS warning: precompiled NUM_THREADS exceeded, adding auxiliary array for thread metadata.\n");
fprintf(stderr,"Note that your application may still crash, if it is calling OpenBLAS from multiple threads in parallel\n");
fprintf(stderr,"To avoid this warning, please rebuild your copy of OpenBLAS with a larger NUM_THREADS setting\n");
#ifdef USE_OPENMP
fprintf(stderr,"or set the environment variable OMP_NUM_THREADS to %d or lower\n", MAX_CPU_NUMBER);
#else
fprintf(stderr,"or set the environment variable OPENBLAS_NUM_THREADS to %d or lower\n", MAX_CPU_NUMBER);
#endif
memory_overflowed=1;
MB;
new_release_info = (struct release_t*) malloc(NEW_BUFFERS * sizeof(struct release_t));
Expand Down Expand Up @@ -3142,7 +3151,11 @@ void *blas_memory_alloc(int procpos){
#endif
printf("OpenBLAS : Program is Terminated. Because you tried to allocate too many memory regions.\n");
printf("This library was built to support a maximum of %d threads - either rebuild OpenBLAS\n", NUM_BUFFERS);
printf("with a larger NUM_THREADS value or set the environment variable OPENBLAS_NUM_THREADS to\n");
#ifdef USE_OPENMP
printf("with a larger NUM_THREADS value or set the environment variable OMP_NUM_THREADS to\n");
#else
printf("with a larger NUM_THREADS value or set the environment variable OPENBLAS_NUM_THREADS to\n");
#endif
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");
Expand Down
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