From 7343354b3e48f7411970f0528430fbe50f2fa3bb Mon Sep 17 00:00:00 2001
From: Ben Walker <benjamin.walker@intel.com>
Date: Fri, 5 Jan 2018 14:55:14 -0700
Subject: [PATCH] scripts: Disable turbo boost in prep_benchmarks.sh

This reduces the potential for jitter.

Change-Id: I736aceec7551be7033c8d2a6f433c64aba1903c0
Signed-off-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-on: https://review.gerrithub.io/393830
Tested-by: SPDK Automated Test System <sys_sgsw@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
---
 scripts/prep_benchmarks.sh | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/scripts/prep_benchmarks.sh b/scripts/prep_benchmarks.sh
index 024e8c41d..be3543289 100755
--- a/scripts/prep_benchmarks.sh
+++ b/scripts/prep_benchmarks.sh
@@ -7,6 +7,12 @@ function configure_performance() {
 	done
 	echo "Done"
 
+	if [ -f "/sys/devices/system/cpu/intel_pstate/no_turbo" ]; then
+		echo -n "Disabling Turbo Boost..."
+		echo -n 1 > /sys/devices/system/cpu/intel_pstate/no_turbo
+		echo "Done"
+	fi
+
 	echo -n "Disabling irqbalance service..."
 	service irqbalance stop 2> /dev/null
 	echo "Done"