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-rw-r--r--erts/etc/unix/cerl.src5
1 files changed, 4 insertions, 1 deletions
diff --git a/erts/etc/unix/cerl.src b/erts/etc/unix/cerl.src
index 710a7a9ef6..59de9bdec8 100644
--- a/erts/etc/unix/cerl.src
+++ b/erts/etc/unix/cerl.src
@@ -312,8 +312,11 @@ if [ "x$GDB" = "x" ]; then
# on multiple cores (especially with async threads). Valgrind only run one pthread
# at a time anyway so there is no point letting it utilize more than one core.
# Use $sched_arg to force all schedulers online to emulate multicore.
- taskset1="taskset 1"
ncpu=`cat /proc/cpuinfo | grep -w processor | wc -l`
+ # Choose a random core in order to not collide with any other valgrind
+ # run on the same machine.
+ taskset1=$((1 << (`shuf -i 1-$ncpu -n 1` - 1) ))
+ taskset1="taskset $taskset1"
sched_arg="-S$ncpu:$ncpu"
else
taskset1=