evaluate_perf_counters.sh

#!/bin/env bash

set -e

if [ "$EUID" -ne 0 ]; then 
    echo "Please run this command as root!"
    exit 1
fi

if [ -z $CPUPOWER ]; then
    CPUPOWER=cpupower
fi

GOVERNOR=$($CPUPOWER frequency-info -p | awk '/^.+The governor/ { gsub(/"/,""); print $3 }')

for workload in "$@"
do
  echo "####### Running workload ${workload} ##########"

  workload_name=$(basename "$workload")
  set -x


  $CPUPOWER frequency-set -g memutil
  mkdir -p "$workload_name-memutil-log"
  # Copying the current log will clear it, so we start with a fresh log
  cp /sys/kernel/debug/memutil/log /dev/null
  # Start the copy-log, as well as pinpoint-stats commands in the background
  # and terminate both, if one of them exits.
  # See: https://unix.stackexchange.com/questions/231676/given-two-background-commands-terminate-the-remaining-one-when-either-exits
  ../kernel-module/copy-log.sh -c -i 8 "$workload_name-memutil-log" $(nproc) &
  # Start logging a short period before running the workload
  sleep 0.1s
  { $workload; sleep 0.1s; $workload; sleep 0.1s; $workload; sleep 0.1s; } &
  wait -n
  pkill -P $$
  wait -n # Wait to assure all logs have been copied

  set +x
done

echo "Restoring frequency governor to: $GOVERNOR"
$CPUPOWER frequency-set -g "$GOVERNOR"