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#! /bin/bash
#
# Copyright (c) 2015-2025, Intel Corporation
# SPDX-License-Identifier: BSD-3-Clause
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimer in the documentation
# and/or other materials provided with the distribution.
# * Neither the name of Intel Corporation nor the names of its contributors
# may be used to endorse or promote products derived from this software
# without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
set -e
prog=`basename $0`
usage() {
cat <<EOF
usage: $prog [<options>] <perf.data-file>
Extract the sideband records from a perf data file.
options:
-h this text
-d print commands, don't execute them
<perf.data-file> defaults to perf.data.
EOF
}
dry_run=0
while getopts "hd" opt; do
case $opt in
h)
usage
exit 0
;;
d)
dry_run=1
;;
esac
done
shift $(($OPTIND-1))
if [[ $# == 0 ]]; then
file="perf.data"
elif [[ $# == 1 ]]; then
file="$1"
shift
else
usage
exit 1
fi
base="$(basename $file)"
if [[ "$dry_run" == 0 ]]; then
nofiles=0
for ofile in $base-sideband-cpu*.pevent $base-sideband.pevent; do
if [[ -w $ofile ]]; then
echo "$prog: $ofile is in the way."
nofiles+=1
fi
done
if [[ "$nofiles" > 0 ]]; then
exit 1
fi
fi
perf script --no-itrace -i "$file" -D | gawk -F' ' -- '
function handle_record(ofile, offset, size) {
cmd = sprintf("dd if=%s of=%s conv=notrunc oflag=append ibs=1 skip=%d " \
"count=%d status=none", file, ofile, offset, size)
if (dry_run != 0) {
print cmd
}
else {
system(cmd)
}
next
}
function handle_global_record(offset, size) {
ofile = sprintf("%s-sideband.pevent", base)
handle_record(ofile, offset, size)
}
function handle_cpu_record(cpu, offset, size) {
# (uint32_t) -1 = 4294967295
#
if (cpu == -1 || cpu == 4294967295) {
handle_global_record(offset, size);
}
else {
ofile = sprintf("%s-sideband-cpu%d.pevent", base, cpu)
handle_record(ofile, offset, size)
}
}
/PERF_RECORD_AUXTRACE_INFO/ { next }
/PERF_RECORD_AUXTRACE/ { next }
/PERF_RECORD_FINISHED_ROUND/ { next }
/^[0-9]+ [0-9]+ 0x[0-9a-f]+ \[0x[0-9a-f]+\]: PERF_RECORD_/ {
cpu = strtonum($1)
begin = strtonum($3)
size = strtonum(substr($4, 2))
handle_cpu_record(cpu, begin, size)
}
/^[0-9]+ 0x[0-9a-f]+ \[0x[0-9a-f]+\]: PERF_RECORD_/ {
begin = strtonum($2)
size = strtonum(substr($3, 2))
handle_global_record(begin, size)
}
/^0x[0-9a-f]+ \[0x[0-9a-f]+\]: PERF_RECORD_/ {
begin = strtonum($1)
size = strtonum(substr($2, 2))
handle_global_record(begin, size)
}
' file="$file" base="$base" dry_run="$dry_run"
|
