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#!/bin/bash
set -e # Exit on errors.
sched_rt=/proc/sys/kernel/sched_rt_runtime_us
orig_sched_rt=/tmp/${sched_rt##*/}.txt
function prologue {
sudo hugeadm --pool-pages-min 1GB:1 || : # Ignore failures.
sudo cpupower frequency-set --related --governor performance >/dev/null || : # Ignore failures.
# Disable real-time throttling. Save its original value.
if [[ -e ${sched_rt} ]]; then
local tmp_orig_sched_rt=${orig_sched_rt}.${BASHPID}~
[[ -e ${orig_sched_rt} ]] || cat ${sched_rt} > ${tmp_orig_sched_rt}
echo -1 | {
sudo tee ${sched_rt} >/dev/null
[[ ! -e ${tmp_orig_sched_rt} ]] || mv -f ${tmp_orig_sched_rt} ${orig_sched_rt}
}
fi
}
function epilogue {
sudo cpupower frequency-set --related --governor powersave >/dev/null || : # Ignore failures.
# Restore original real-time throttling value.
if [[ -f ${orig_sched_rt} ]]; then
sudo tee ${sched_rt} >/dev/null <${orig_sched_rt} && rm ${orig_sched_rt}
fi
}
function benchmark {
trap epilogue EXIT
prologue
(set -e; exec "$@")
}
if [[ "${BASH_SOURCE[0]}" == "${0}" ]]; then
benchmark "$@"
fi
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