cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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record+zstd_comp_decomp.sh (1124B)

      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	$perf_tool record -h 2>&1 | grep -q '\-z, \-\-compression\-level'
     11}
     12
     13collect_z_record() {
     14	echo "Collecting compressed record file:"
     15	[ "$(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
     20check_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
     26check_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 $trace_file.decomp.output
     31}
     32
     33skip_if_no_z_record || exit 2
     34collect_z_record && check_compressed_stats && check_compressed_output
     35err=$?
     36rm -f $trace_file*
     37exit $err