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adjust number of threads for small size in cgemv and zgemv

This commit is contained in:
wernsaar 2014-07-15 16:27:02 +02:00
parent b985cea65d
commit 51413925bd
1 changed files with 13 additions and 1 deletions
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14
interface/zgemv.c
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@ -233,7 +233,19 @@ void CNAME(enum CBLAS_ORDER order,
buffer = (FLOAT *)blas_memory_alloc(1);
#ifdef SMP
nthreads = num_cpu_avail(2);
int nthreads_max = num_cpu_avail(2);
int nthreads_avail = nthreads_max;
double MNK = (double) m * (double) n;
if ( MNK <= (80.0 * 20.0 * (double) GEMM_MULTITHREAD_THRESHOLD) )
nthreads_max = 1;
if ( nthreads_max > nthreads_avail )
nthreads = nthreads_avail;
else
nthreads = nthreads_max;
if (nthreads == 1) {
#endif