linux-kernel-module-cheat/gem5-bench-cache

#!/usr/bin/env bash
set -eu
root_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" >/dev/null && pwd)"
generate_checkpoints=true
while getopts "C" OPT; do
  case "$OPT" in
    C)
      generate_checkpoints=false
      ;;
    ?)
      exit 2;
      ;;
  esac
done
shift "$(($OPTIND - 1))"
common_opts="--emulator gem5 $@"

# Vars
cmd="./run ${common_opts}"
cache_small='--caches --l2cache --l1d_size=1024   --l1i_size=1024   --l2_size=1024   --l3_size=1024  '
cache_large='--caches --l2cache --l1d_size=1024kB --l1i_size=1024kB --l2_size=1024kB --l3_size=1024kB'
results_file="$(${root_dir}/getvar ${common_opts} run_dir)/bench-cache.txt"

bench() (
  "${root_dir}/bench-cmd" "$1"
  {
    printf 'cycles '
    ./gem5-stat ${common_opts}
    printf 'instructions '
    ./gem5-stat ${common_opts} sim_insts
    # RESTORE_INVESTIGATION
    #cycles_switch="$(./gem5-stat ${common_opts} system.switch_cpus.numCycles)"
    #if [ -n "$cycles_switch" ]; then
    #  printf "cycles_switch ${cycles_switch}\n"
    #fi
    printf "\n"
  } >> "$results_file"
)

bench-all() (
  bench "${cmd} --gem5-readfile \"$1\" --gem5-restore 1 -- ${cache_small} --cpu-type=HPI --restore-with-cpu=HPI"
  bench "${cmd} --gem5-readfile \"$1\" --gem5-restore 1 -- ${cache_large} --cpu-type=HPI --restore-with-cpu=HPI"
  # RESTORE_INVESTIGATION
  # These were mostly to investigate what happens on restore:
  # https://stackoverflow.com/questions/49011096/how-to-switch-cpu-models-in-gem5-after-restoring-a-checkpoint-and-then-observe-t
  #bench "${cmd} --gem5-readfile '$1' --gem5-restore 1"
  #bench "${cmd} --gem5-readfile '$1' --gem5-restore 1 -- ${cache_small}"
  #bench "${cmd} --gem5-readfile '$1' --gem5-restore 1 -- ${cache_large}"
  #bench "${cmd} --gem5-readfile '$1' --gem5-restore 2 -- ${cache_small}"
  #bench "${cmd} --gem5-readfile '$1' --gem5-restore 3 -- ${cache_large}"
  #bench "${cmd} --gem5-readfile '$1' --gem5-restore 4 -- ${cache_small} --cpu-type=HPI"
  #bench "${cmd} --gem5-readfile '$1' --gem5-restore 5 -- ${cache_large} --cpu-type=HPI"
  ## Restore from At-- omicSimpleCPU to HPI.
  #bench "${cmd} --gem5-readfile '$1' --gem5-restore 2 -- ${cache_small} --cpu-type=HPI --restore-with-cpu=HPI"
  #bench "${cmd} --gem5-readfile '$1' --gem5-restore 3 -- ${cache_large} --cpu-type=HPI --restore-with-cpu=HPI"
  #bench "${cmd} --gem5-readfile '$1' --gem5-restore 2 -- ${cache_small} --restore-with-cpu=HPI"
  #bench "${cmd} --gem5-readfile '$1' --gem5-restore 3 -- ${cache_large} --restore-with-cpu=HPI"
  #bench "${cmd} --gem5-readfile '$1' --gem5-restore 2 -- ${cache_small} --cpu-type=HPI"
  #bench "${cmd} --gem5-readfile '$1' --gem5-restore 3 -- ${cache_large} --cpu-type=HPI"
  ## Restore HPI with different cache sizes and see if it is used.
  #bench "${cmd} --gem5-readfile '$1' --gem5-restore 4 -- ${cache_large} --cpu-type=HPI"
  #bench "${cmd} --gem5-readfile '$1' --gem5-restore 5 -- ${cache_small} --cpu-type=HPI"
  #bench "${cmd} --gem5-readfile '$1' --gem5-restore 2 -- ${cache_large} --cpu-type=HPI"
  #bench "${cmd} --gem5-readfile '$1' --gem5-restore 3 -- ${cache_small} --cpu-type=HPI"
)


if "$generate_checkpoints"; then
  # Create the checkpoints after the kernel boot.
  cpt_cmd="--eval './gem5.sh'"
  # RESTORE_INVESTIGATION
  ## 5
  #./eeval "$cmd $cpt_cmd -- $cache_large --cpu-type=HPI"
  ## 4
  #./eeval "$cmd $cpt_cmd -- $cache_small --cpu-type=HPI"
  ## 3
  #./eeval "$cmd $cpt_cmd -- $cache_large"
  ## 2
  #./eeval "$cmd $cpt_cmd -- $cache_small"
  # 1
  ./eeval "$cmd $cpt_cmd"
fi

# Restore and run benchmarks.
rm -f "$results_file"
for n in 1000 10000 100000; do
  bench-all "dhrystone ${n}"
done