[PATCH v6 0/5] MCPM backend for Exynos5420

[Nicolas Pitre]

On Mon, 19 May 2014, Abhilash Kesavan wrote:

> Hi Nicolas,
> 
> On Thu, May 15, 2014 at 10:22 PM, Nicolas Pitre
> <nicolas.pitre at linaro.org> wrote:
> > Once you implement full cluster shutdown I can provide you with another
> > script stressing that part.
> I am done with the cluster power on/off code and it seems to work fine
> with bL_switcher. Can you please provide me with your stress script.

Here's the script.  Credits go to Dave Martin for this one.

The script assumes that cluster 0 comprises cpus 0 to 3 and cluster 1 
comprises cpus 4 to 7.  You need to edit it otherwise.

----- >8
#!/bin/bash

echo 0 >/sys/kernel/bL_switcher/active
sleep 1

pids=

for x in \
	"cluster=cluster0; cpus='cpu0 cpu1 cpu2 cpu3'" \
	"cluster=cluster1; cpus='cpu4 cpu5 cpu6 cpu7'"
do
	eval "$x"
	eval "\
$cluster () {
	pids=
		`for cpu in $cpus; do cat <<EOF; done
	(sleep .00\\$RANDOM; echo \\$1 >/sys/devices/system/cpu/$cpu/online)&
	echo \\$1 >/sys/devices/system/cpu/$cpu/online&
	pids=\\$pids\ \\$!
EOF`
	wait \$pids
	if [ \$1 = 0 ]; then
		echo \"\$n: $cluster off\"
	else
		echo \"\$n: $cluster on\"
	fi
}"
done

n=0
while :; do
	: $((++n))
	cluster1 1; cluster0 0
	cluster0 1; cluster1 0
done
----- >8


Nicolas