Introduce a lower limit for multithreading

2024-05-14 18:59:21 +02:00
parent 5fd871d7ea
commit 2957281275
1 changed files with 4 additions and 1 deletions
--- a/interface/zgbmv.c
+++ b/interface/zgbmv.c
@@ -251,7 +251,10 @@ void CNAME(enum CBLAS_ORDER order,
  buffer = (FLOAT *)blas_memory_alloc(1);

 #ifdef SMP
-  nthreads = num_cpu_avail(2);
+  if (m * n  < 125000 || ku + kl < 15) 
+    nthreads = 1;
+  else
+    nthreads = num_cpu_avail(2);

  if (nthreads == 1) {
 #endif