tools/perf/tests/shell/record+zstd_comp_decomp.sh

   1 #!/bin/sh
   2 # Zstd perf.data compression/decompression
   3
   4 # SPDX-License-Identifier: GPL-2.0
   5
   6 trace_file=$(mktemp /tmp/perf.data.XXX)
   7 perf_tool=perf
   8
   9 skip_if_no_z_record() {
  10         $perf_tool record -h 2>&1 | grep -q '\-z, \-\-compression\-level'
  11 }
  12
  13 collect_z_record() {
  14         echo "Collecting compressed record file:"
  15         [ "$(uname -m)" != s390x ] && gflag='-g'
  16         $perf_tool record -o "$trace_file" $gflag -z -F 5000 -- \
  17                 dd count=500 if=/dev/urandom of=/dev/null
  18 }
  19
  20 check_compressed_stats() {
  21         echo "Checking compressed events stats:"
  22         $perf_tool report -i "$trace_file" --header --stats | \
  23                 grep -E "(# compressed : Zstd,)|(COMPRESSED events:)"
  24 }
  25
  26 check_compressed_output() {
  27         $perf_tool inject -i "$trace_file" -o "$trace_file.decomp" &&
  28         $perf_tool report -i "$trace_file" --stdio -F comm,dso,sym | head -n -3 > "$trace_file.comp.output" &&
  29         $perf_tool report -i "$trace_file.decomp" --stdio -F comm,dso,sym | head -n -3 > "$trace_file.decomp.output" &&
  30         diff "$trace_file.comp.output" "$trace_file.decomp.output"
  31 }
  32
  33 skip_if_no_z_record || exit 2
  34 collect_z_record && check_compressed_stats && check_compressed_output
  35 err=$?
  36 rm -f "$trace_file*"
  37 exit $err