[PATCH 2/2] perf test lock_contention.sh: Skip test if not enough CPUs

[vmolnaro@redhat.com]

From: Veronika Molnarova <vmolnaro@redhat.com>

Machines with less then 4 CPUs weren't consistently triggering lock
events required for the test.

Skip the test on those machines. The limit of 4 CPUs is set as it
generates around 100 lock events for a test.

Signed-off-by: Veronika Molnarova <vmolnaro@redhat.com>
---
Resending the patches with sign-off as it didn't go through last time, 
also tried to fix the found issues.

 tools/perf/tests/shell/lock_contention.sh | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/tools/perf/tests/shell/lock_contention.sh b/tools/perf/tests/shell/lock_contention.sh
index f2cc187b618..768c10f1d6b 100755
--- a/tools/perf/tests/shell/lock_contention.sh
+++ b/tools/perf/tests/shell/lock_contention.sh
@@ -32,6 +32,12 @@ check() {
 		err=2
 		exit
 	fi
+
+	if [ `nproc` -lt 4 ]; then
+		echo "[Skip] Low number of CPUs (`nproc`), lock event cannot be triggered certainly"
+		err=2
+		exit
+	fi
 }
 
 test_record()
-- 
2.41.0