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#!/bin/bash
SCHEDUTIL="/sys/devices/system/cpu/cpufreq/schedutil"
pretest="echo 1 > $SCHEDUTIL/reset"
posttest="grep . $SCHEDUTIL/*"
perform_test()
{
eval $pretest
printf "Test: $*\n\n"
eval $*
printf "\nSched-stats:\n"
eval $posttest
}
runme()
{
# perform_test cyclictest -q -t 32 -i 10000 --latency=1000000 -D 5
perform_test perf bench sched pipe
}
trace()
{
BUFFER=100000
FILE=dft-$1
EVENTS=" -e sched"
#EVENTS=" -e all"
trace-cmd start -b $BUFFER $EVENTS
runme > perf-trace-$1.txt
trace-cmd stop
cat /sys/kernel/debug/tracing/trace > $FILE.txt
trace-cmd extract -o $FILE.dat
echo "Saved trace in: "$FILE
sync
}
echo 0 > /sys/devices/system/cpu/cpufreq/schedutil/tick
trace 0
echo 1 > /sys/devices/system/cpu/cpufreq/schedutil/tick
trace 1
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