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ggml-cpu : set openmp wait time if not set #13758

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Merged
merged 2 commits into from
May 24, 2025
Merged

ggml-cpu : set openmp wait time if not set #13758

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ggml-cpu : set openmp wait policy to active if not set
slaren May 24, 2025
9f85363
set KMP_BLOCKTIME instead
slaren May 24, 2025
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13 changes: 13 additions & 0 deletions ggml/src/ggml-cpu/ggml-cpu.c
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Original file line number Diff line number Diff line change
Expand Up @@ -3484,6 +3484,19 @@ void ggml_cpu_init(void) {
const uint64_t t_end = ggml_time_us(); UNUSED(t_end);

GGML_PRINT_DEBUG("%s: GELU, Quick GELU, SILU and EXP tables initialized in %f ms\n", __func__, (t_end - t_start)/1000.0);

#ifdef GGML_USE_OPENMP
//if (!getenv("OMP_WAIT_POLICY")) {
// // set the wait policy to active, so that OpenMP threads don't sleep
// putenv("OMP_WAIT_POLICY=active");
//}

if (!getenv("KMP_BLOCKTIME")) {
// set the time to wait before sleeping a thread
// this is less aggressive than setting the wait policy to active, but should achieve similar results in most cases
putenv("KMP_BLOCKTIME=200"); // 200ms
}
#endif
}

#if defined(__ARM_ARCH)
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