2 # Zstd perf.data compression/decompression
4 # SPDX-License-Identifier: GPL-2.0
6 trace_file=$(mktemp /tmp/perf.data.XXX)
9 skip_if_no_z_record() {
10 $perf_tool record -h 2>&1 | grep -q '\-z, \-\-compression\-level'
14 echo "Collecting compressed record file:"
15 $perf_tool record -o $trace_file -g -z -F 5000 -- \
16 dd count=500 if=/dev/urandom of=/dev/null
19 check_compressed_stats() {
20 echo "Checking compressed events stats:"
21 $perf_tool report -i $trace_file --header --stats | \
22 grep -E "(# compressed : Zstd,)|(COMPRESSED events:)"
25 check_compressed_output() {
26 $perf_tool inject -i $trace_file -o $trace_file.decomp &&
27 $perf_tool report -i $trace_file --stdio | head -n -3 > $trace_file.comp.output &&
28 $perf_tool report -i $trace_file.decomp --stdio | head -n -3 > $trace_file.decomp.output &&
29 diff $trace_file.comp.output $trace_file.decomp.output
32 skip_if_no_z_record || exit 2
33 collect_z_record && check_compressed_stats && check_compressed_output