Increase Zen SWITCH_RATIO to 16

following GEMM benchmarks on Ryzen2700X. For #1464

diff --git a/param.h b/param.h
index fa67302..15ea663 100644 (file)
--- a/param.h
+++ b/param.h
@@ -605,7 +605,7 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #define SYMV_P  8
 
-#define SWITCH_RATIO   4
+#define SWITCH_RATIO   16
 
 #ifdef ARCH_X86