From 9382f854b3a67c5a970ad3342a3c12454974eccd Mon Sep 17 00:00:00 2001
From: Joost VandeVondele <Joost.VandeVondele@gmail.com>
Date: Wed, 30 Sep 2020 21:22:36 +0200
Subject: [PATCH] Schedule threads fairly under valgrind

fixes a rare case that can cause CI to fail when running multithreaded under valgrind.

closes https://github.com/official-stockfish/Stockfish/pull/3165

No functional change.
---
 tests/instrumented.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tests/instrumented.sh b/tests/instrumented.sh
index 03ded74a..03e9c9de 100755
--- a/tests/instrumented.sh
+++ b/tests/instrumented.sh
@@ -20,7 +20,7 @@ case $1 in
   --valgrind-thread)
     echo "valgrind-thread testing started"
     prefix=''
-    exeprefix='valgrind --error-exitcode=42'
+    exeprefix='valgrind --fair-sched=try --error-exitcode=42'
     postfix='1>/dev/null'
     threads="2"
   ;;
-- 
2.39.2