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Serialize accesses to parallelized level3 functions from multiple cal… #1875

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Merged
merged 3 commits into from
Nov 25, 2018
Merged

Serialize accesses to parallelized level3 functions from multiple cal… #1875

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2e6fae2
Serialize accesses to parallelized level3 functions from multiple cal…
martin-frbg Nov 19, 2018
5192651
Add CriticalSection handling instead of mutexes for Windows
martin-frbg Nov 19, 2018
113cb00
fix missing parenthesis
martin-frbg Nov 19, 2018
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25 changes: 25 additions & 0 deletions driver/level3/level3_thread.c
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Original file line number Diff line number Diff line change
Expand Up @@ -514,6 +514,15 @@ static int gemm_driver(blas_arg_t *args, BLASLONG *range_m, BLASLONG
*range_n, FLOAT *sa, FLOAT *sb,
BLASLONG nthreads_m, BLASLONG nthreads_n) {

#ifndef USE_OPENMP
#ifndef OS_WINDOWS
static pthread_mutex_t level3_lock = PTHREAD_MUTEX_INITIALIZER;
#else
CRITICAL_SECTION level3_lock;
InitializeCriticalSection((PCRITICAL_SECTION)&level3_lock);
#endif
#endif

blas_arg_t newarg;

#ifndef USE_ALLOC_HEAP
Expand Down Expand Up @@ -554,6 +563,14 @@ static int gemm_driver(blas_arg_t *args, BLASLONG *range_m, BLASLONG
#endif
#endif

#ifndef USE_OPENMP
#ifndef OS_WINDOWS
pthread_mutex_lock(&level3_lock);
#else
EnterCriticalSection((PCRITICAL_SECTION)&level3_lock);
#endif
#endif

#ifdef USE_ALLOC_HEAP
/* Dynamically allocate workspace */
job = (job_t*)malloc(MAX_CPU_NUMBER * sizeof(job_t));
Expand Down Expand Up @@ -671,6 +688,14 @@ static int gemm_driver(blas_arg_t *args, BLASLONG *range_m, BLASLONG
free(job);
#endif

#ifndef USE_OPENMP
#ifndef OS_WINDOWS
pthread_mutex_unlock(&level3_lock);
#else
LeaveCriticalSection((PCRITICAL_SECTION)&level3_lock);
#endif
#endif

return 0;
}

Expand Down