1#!/bin/sh 2# Zstd perf.data compression/decompression 3 4# SPDX-License-Identifier: GPL-2.0 5 6trace_file=$(mktemp /tmp/perf.data.XXX) 7perf_tool=perf 8 9skip_if_no_z_record() { 10 $perf_tool record -h 2>&1 | grep -q '\-z, \-\-compression\-level' 11} 12 13collect_z_record() { 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 17} 18 19check_compressed_stats() { 20 echo "Checking compressed events stats:" 21 $perf_tool report -i $trace_file --header --stats | \ 22 grep -E "(# compressed : Zstd,)|(COMPRESSED events:)" 23} 24 25check_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 $trace_file.decomp.output 30} 31 32skip_if_no_z_record || exit 2 33collect_z_record && check_compressed_stats && check_compressed_output 34err=$? 35rm -f $trace_file* 36exit $err 37