floraachy
/
OpenBLAS
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

swap: disable multi-threading for small matrices 

Close #731
This commit is contained in:
Jerome Robert 2016-01-18 09:12:37 +01:00
parent 3ae30cd6b9
commit 66eafb16cf
1 changed files with 4 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
interface/swap.c
View File

@ -77,12 +77,13 @@ void CNAME(blasint n, FLOAT *x, blasint incx, FLOAT *y, blasint incy){
if (incy < 0) y -= (n - 1) * incy; if (incy < 0) y -= (n - 1) * incy;
#ifdef SMP #ifdef SMP
nthreads = num_cpu_avail(1);
//disable multi-thread when incx==0 or incy==0 //disable multi-thread when incx==0 or incy==0
//In that case, the threads would be dependent. //In that case, the threads would be dependent.
if (incx == 0 || incy == 0) if (incx == 0 || incy == 0 || n < 2097152 * GEMM_MULTITHREAD_THRESHOLD / sizeof(FLOAT))
nthreads = 1; nthreads = 1;
else
nthreads = num_cpu_avail(1);
if (nthreads == 1) { if (nthreads == 1) {
#endif #endif