azai91 commented on a change in pull request #12380: Manually track
num_max_thread
URL: https://github.com/apache/incubator-mxnet/pull/12380#discussion_r227076318
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File path: src/engine/openmp.cc
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@@ -73,34 +73,14 @@ void OpenMP::set_reserve_cores(int cores) {
CHECK_GE(cores, 0);
reserve_cores_ = cores;
#ifdef _OPENMP
- if (reserve_cores_ >= omp_thread_max_) {
- omp_set_num_threads(1);
- } else {
- omp_set_num_threads(omp_thread_max_ - reserve_cores_);
- }
+ omp_thread_max_ = std::max(omp_thread_max_ - reserve_cores_, 1);
#endif
}
int OpenMP::GetRecommendedOMPThreadCount(bool exclude_reserved) const {
#ifdef _OPENMP
- if (omp_num_threads_set_in_environment_) {
- return omp_get_max_threads();
- }
- if (enabled_) {
- int thread_count = omp_get_max_threads();
- if (exclude_reserved) {
- if (reserve_cores_ >= thread_count) {
- thread_count = 1;
- } else {
- thread_count -= reserve_cores_;
- }
- }
- // Check that OMP doesn't suggest more than our 'omp_thread_max_' value
- if (!omp_thread_max_ || thread_count < omp_thread_max_) {
- return thread_count;
- }
+ if (omp_num_threads_set_in_environment_ || enabled_)
Review comment:
kk
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