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#!/bin/bash
WINDOW=$1
PERIOD=$2
if [[ -z $WINDOW ]] || [[ -z $PERIOD ]]; then
echo "Window or Period not specified!"
echo "Example usage: ./set_strobing.sh <WINDOW VALUE> <PERIOD VALUE>"
echo "Example usage: ./set_strobing.sh 5000 10000"
exit -1
fi
if [[ $EUID != 0 ]]; then
echo "Please run as root"
exit -1
fi
for e in /sys/bus/coresight/devices/etm*/; do
printf "%x" $WINDOW | tee $e/strobe_window > /dev/null
printf "%x" $PERIOD | tee $e/strobe_period > /dev/null
echo "Strobing period for $e set to $((`cat $e/strobe_period`))"
echo "Strobing window for $e set to $((`cat $e/strobe_window`))"
done
## Shows the user a simple usage example
echo ">> Done! <<"
echo "You can now run perf to trace your application, for example:"
echo "perf record -e cs_etm/@tmc_etr0/u -- <your app>"
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