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#!/bin/bash
# perf stat CSV output linter
# SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
# Tests various perf stat CSV output commands for the
# correct number of fields and the CSV separator set to ','.
set -e
skip_test=0
csv_sep=@
function commachecker()
{
local -i cnt=0
local exp=0
case "$1"
in "--no-args") exp=6
;; "--system-wide") exp=6
;; "--event") exp=6
;; "--interval") exp=7
;; "--per-thread") exp=7
;; "--system-wide-no-aggr") exp=7
[ $(uname -m) = "s390x" ] && exp='^[6-7]$'
;; "--per-core") exp=8
;; "--per-socket") exp=8
;; "--per-node") exp=8
;; "--per-die") exp=8
esac
while read line
do
# Check for lines beginning with Failed
x=${line:0:6}
[ "$x" = "Failed" ] && continue
# Count the number of commas
x=$(echo $line | tr -d -c $csv_sep)
cnt="${#x}"
# echo $line $cnt
[[ ! "$cnt" =~ $exp ]] && {
echo "wrong number of fields. expected $exp in $line" 1>&2
exit 1;
}
done
return 0
}
# Return true if perf_event_paranoid is > $1 and not running as root.
function ParanoidAndNotRoot()
{
[ $(id -u) != 0 ] && [ $(cat /proc/sys/kernel/perf_event_paranoid) -gt $1 ]
}
check_no_args()
{
echo -n "Checking CSV output: no args "
perf stat -x$csv_sep true 2>&1 | commachecker --no-args
echo "[Success]"
}
check_system_wide()
{
echo -n "Checking CSV output: system wide "
if ParanoidAndNotRoot 0
then
echo "[Skip] paranoid and not root"
return
fi
perf stat -x$csv_sep -a true 2>&1 | commachecker --system-wide
echo "[Success]"
}
check_system_wide_no_aggr()
{
echo -n "Checking CSV output: system wide "
if ParanoidAndNotRoot 0
then
echo "[Skip] paranoid and not root"
return
fi
echo -n "Checking CSV output: system wide no aggregation "
perf stat -x$csv_sep -A -a --no-merge true 2>&1 | commachecker --system-wide-no-aggr
echo "[Success]"
}
check_interval()
{
echo -n "Checking CSV output: interval "
perf stat -x$csv_sep -I 1000 true 2>&1 | commachecker --interval
echo "[Success]"
}
check_event()
{
echo -n "Checking CSV output: event "
perf stat -x$csv_sep -e cpu-clock true 2>&1 | commachecker --event
echo "[Success]"
}
check_per_core()
{
echo -n "Checking CSV output: per core "
if ParanoidAndNotRoot 0
then
echo "[Skip] paranoid and not root"
return
fi
perf stat -x$csv_sep --per-core -a true 2>&1 | commachecker --per-core
echo "[Success]"
}
check_per_thread()
{
echo -n "Checking CSV output: per thread "
if ParanoidAndNotRoot 0
then
echo "[Skip] paranoid and not root"
return
fi
perf stat -x$csv_sep --per-thread -a true 2>&1 | commachecker --per-thread
echo "[Success]"
}
check_per_die()
{
echo -n "Checking CSV output: per die "
if ParanoidAndNotRoot 0
then
echo "[Skip] paranoid and not root"
return
fi
perf stat -x$csv_sep --per-die -a true 2>&1 | commachecker --per-die
echo "[Success]"
}
check_per_node()
{
echo -n "Checking CSV output: per node "
if ParanoidAndNotRoot 0
then
echo "[Skip] paranoid and not root"
return
fi
perf stat -x$csv_sep --per-node -a true 2>&1 | commachecker --per-node
echo "[Success]"
}
check_per_socket()
{
echo -n "Checking CSV output: per socket "
if ParanoidAndNotRoot 0
then
echo "[Skip] paranoid and not root"
return
fi
perf stat -x$csv_sep --per-socket -a true 2>&1 | commachecker --per-socket
echo "[Success]"
}
# The perf stat options for per-socket, per-core, per-die
# and -A ( no_aggr mode ) uses the info fetched from this
# directory: "/sys/devices/system/cpu/cpu*/topology". For
# example, socket value is fetched from "physical_package_id"
# file in topology directory.
# Reference: cpu__get_topology_int in util/cpumap.c
# If the platform doesn't expose topology information, values
# will be set to -1. For example, incase of pSeries platform
# of powerpc, value for "physical_package_id" is restricted
# and set to -1. Check here validates the socket-id read from
# topology file before proceeding further
FILE_LOC="/sys/devices/system/cpu/cpu*/topology/"
FILE_NAME="physical_package_id"
check_for_topology()
{
if ! ParanoidAndNotRoot 0
then
socket_file=`ls $FILE_LOC/$FILE_NAME | head -n 1`
[ -z $socket_file ] && return 0
socket_id=`cat $socket_file`
[ $socket_id == -1 ] && skip_test=1
return 0
fi
}
check_for_topology
check_no_args
check_system_wide
check_interval
check_event
check_per_thread
check_per_node
if [ $skip_test -ne 1 ]
then
check_system_wide_no_aggr
check_per_core
check_per_die
check_per_socket
else
echo "[Skip] Skipping tests for system_wide_no_aggr, per_core, per_die and per_socket since socket id exposed via topology is invalid"
fi
exit 0
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