| 1 | // RUN: %libomp-compile |
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| 2 | // RUN: env KMP_HOT_TEAMS_MODE=0 KMP_HOT_TEAMS_MAX_LEVEL=1 %libomp-run |
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| 3 | // |
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| 4 | // Force the defaults of: |
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| 5 | // KMP_HOT_TEAMS_MODE=0 means free extra threads after parallel |
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| 6 | // involving non-hot team |
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| 7 | // KMP_HOT_TEAMS_MAX_LEVEL=1 means only the initial outer team |
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| 8 | // is a hot team. |
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| 9 | |
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| 10 | #include <stdio.h> |
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| 11 | #include <stdlib.h> |
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| 12 | #include <omp.h> |
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| 13 | |
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| 14 | int main() { |
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| 15 | int a; |
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| 16 | omp_set_max_active_levels(2); |
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| 17 | // This nested parallel creates extra threads on the thread pool |
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| 18 | #pragma omp parallel num_threads(2) |
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| 19 | { |
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| 20 | #pragma omp parallel num_threads(2) |
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| 21 | { |
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| 22 | #pragma omp atomic |
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| 23 | a++; |
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| 24 | } |
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| 25 | } |
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| 26 | |
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| 27 | // Causes assert if hidden helper thread tries to allocate from thread pool |
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| 28 | // instead of creating new OS threads |
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| 29 | #pragma omp parallel num_threads(1) |
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| 30 | { |
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| 31 | #pragma omp target nowait |
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| 32 | { a++; } |
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| 33 | } |
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| 34 | |
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| 35 | return EXIT_SUCCESS; |
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| 36 | } |
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| 37 | |
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