From 8a1710dd0da445d76e6eaeb35b180d24efac0919 Mon Sep 17 00:00:00 2001
From: Martin Kroeker <martin@ruby.chemie.uni-freiburg.de>
Date: Sun, 6 Oct 2024 20:03:32 +0200
Subject: [PATCH] don't apply switch_ratio to tail of loop

---
 driver/level3/level3_thread.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/driver/level3/level3_thread.c b/driver/level3/level3_thread.c
index ddb39abd66..3d56c45a99 100644
--- a/driver/level3/level3_thread.c
+++ b/driver/level3/level3_thread.c
@@ -742,7 +742,7 @@ static int gemm_driver(blas_arg_t *args, BLASLONG *range_m, BLASLONG
     num_parts  = 0;
     while (n > 0){
       width = blas_quickdivide(n + nthreads - num_parts - 1, nthreads - num_parts);
-      if (width < switch_ratio) {
+      if (width < switch_ratio && width > 1) {
         width = switch_ratio;
       }
       width = round_up(n, width, GEMM_PREFERED_SIZE);