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Date: Tue, 13 Jun 2023 13:21:30 -0700
From: Ian Rogers <irogers@...gle.com>
To: kan.liang@...ux.intel.com
Cc: acme@...nel.org, mingo@...hat.com, peterz@...radead.org,
namhyung@...nel.org, jolsa@...nel.org, adrian.hunter@...el.com,
linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org,
ak@...ux.intel.com, eranian@...gle.com, ahmad.yasin@...el.com
Subject: Re: [PATCH 8/8] perf test: Add test case for the standard perf stat output
On Wed, Jun 7, 2023 at 9:27 AM <kan.liang@...ux.intel.com> wrote:
>
> From: Kan Liang <kan.liang@...ux.intel.com>
>
> Add a new test case to verify the standard perf stat output with
> different options.
>
> Signed-off-by: Kan Liang <kan.liang@...ux.intel.com>
> ---
> tools/perf/tests/shell/stat+std_output.sh | 259 ++++++++++++++++++++++
> 1 file changed, 259 insertions(+)
> create mode 100755 tools/perf/tests/shell/stat+std_output.sh
>
> diff --git a/tools/perf/tests/shell/stat+std_output.sh b/tools/perf/tests/shell/stat+std_output.sh
> new file mode 100755
> index 000000000000..b9db0f245450
> --- /dev/null
> +++ b/tools/perf/tests/shell/stat+std_output.sh
> @@ -0,0 +1,259 @@
> +#!/bin/bash
> +# perf stat STD output linter
> +# SPDX-License-Identifier: GPL-2.0
> +# Tests various perf stat STD output commands for
> +# default event and metricgroup
> +
> +set -e
> +
> +skip_test=0
> +
> +stat_output=$(mktemp /tmp/__perf_test.stat_output.std.XXXXX)
> +
> +event_name=(cpu-clock task-clock context-switches cpu-migrations page-faults cycles instructions branches branch-misses stalled-cycles-frontend stalled-cycles-backend)
> +event_metric=("CPUs utilized" "CPUs utilized" "/sec" "/sec" "/sec" "GHz" "insn per cycle" "/sec" "of all branches" "frontend cycles idle" "backend cycles idle")
> +
> +metricgroup_name=(TopdownL1 TopdownL2)
> +
> +cleanup() {
> + rm -f "${stat_output}"
> +
> + trap - EXIT TERM INT
> +}
> +
> +trap_cleanup() {
> + cleanup
> + exit 1
> +}
> +trap trap_cleanup EXIT TERM INT
> +
> +function commachecker()
> +{
> + local -i cnt=0
> + local prefix=1
> +
> + case "$1"
> + in "--interval") prefix=2
> + ;; "--per-thread") prefix=2
> + ;; "--system-wide-no-aggr") prefix=2
> + ;; "--per-core") prefix=3
> + ;; "--per-socket") prefix=3
> + ;; "--per-node") prefix=3
> + ;; "--per-die") prefix=3
> + ;; "--per-cache") prefix=3
> + esac
> +
> + while read line
> + do
> + # Ignore initial "started on" comment.
> + x=${line:0:1}
> + [ "$x" = "#" ] && continue
> + # Ignore initial blank line.
> + [ "$line" = "" ] && continue
> + # Ignore "Performance counter stats"
> + x=${line:0:25}
> + [ "$x" = "Performance counter stats" ] && continue
> + # Ignore "seconds time elapsed" and break
> + [[ "$line" == *"time elapsed"* ]] && break
> +
> + main_body=$(echo $line | cut -d' ' -f$prefix-)
> + x=${main_body%#*}
> + # Check default metricgroup
> + y=$(echo $x | tr -d ' ')
> + [ "$y" = "" ] && continue
> + for i in "${!metricgroup_name[@]}"; do
> + [[ "$y" == *"${metricgroup_name[$i]}"* ]] && break
> + done
> + [[ "$y" == *"${metricgroup_name[$i]}"* ]] && continue
> +
> + # Check default event
> + for i in "${!event_name[@]}"; do
> + [[ "$x" == *"${event_name[$i]}"* ]] && break
> + done
> +
> + [[ ! "$x" == *"${event_name[$i]}"* ]] && {
> + echo "Unknown event name in $line" 1>&2
> + exit 1;
> + }
> +
> + # Check event metric if it exists
> + [[ ! "$main_body" == *"#"* ]] && continue
> + [[ ! "$main_body" == *"${event_metric[$i]}"* ]] && {
> + echo "wrong event metric. expected ${event_metric[$i]} in $line" 1>&2
> + exit 1;
> + }
> + done < "${stat_output}"
> + 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 $1 ]
> +}
> +
> +check_no_args()
> +{
> + echo -n "Checking STD output: no args "
> + perf stat -o "${stat_output}" true
> + commachecker --no-args
> + echo "[Success]"
> +}
> +
> +check_system_wide()
> +{
> + echo -n "Checking STD output: system wide "
> + if ParanoidAndNotRoot 0
> + then
> + echo "[Skip] paranoid and not root"
> + return
> + fi
> + perf stat -a -o "${stat_output}" true
> + commachecker --system-wide
> + echo "[Success]"
> +}
> +
> +check_system_wide_no_aggr()
> +{
> + echo -n "Checking STD output: system wide no aggregation "
> + if ParanoidAndNotRoot 0
> + then
> + echo "[Skip] paranoid and not root"
> + return
> + fi
> + perf stat -A -a --no-merge -o "${stat_output}" true
> + commachecker --system-wide-no-aggr
> + echo "[Success]"
> +}
> +
> +check_interval()
> +{
> + echo -n "Checking STD output: interval "
> + perf stat -I 1000 -o "${stat_output}" true
> + commachecker --interval
> + echo "[Success]"
> +}
> +
> +
> +check_per_core()
> +{
> + echo -n "Checking STD output: per core "
> + if ParanoidAndNotRoot 0
> + then
> + echo "[Skip] paranoid and not root"
> + return
> + fi
> + perf stat --per-core -a -o "${stat_output}" true
> + commachecker --per-core
> + echo "[Success]"
> +}
> +
> +check_per_thread()
> +{
> + echo -n "Checking STD output: per thread "
> + if ParanoidAndNotRoot 0
> + then
> + echo "[Skip] paranoid and not root"
> + return
> + fi
> + perf stat --per-thread -a -o "${stat_output}" true
> + commachecker --per-thread
> + echo "[Success]"
> +}
> +
> +check_per_cache_instance()
> +{
> + echo -n "Checking STD output: per cache instance "
> + if ParanoidAndNotRoot 0
> + then
> + echo "[Skip] paranoid and not root"
> + return
> + fi
> + perf stat --per-cache -a true 2>&1 | commachecker --per-cache
> + echo "[Success]"
> +}
> +
> +check_per_die()
> +{
> + echo -n "Checking STD output: per die "
> + if ParanoidAndNotRoot 0
> + then
> + echo "[Skip] paranoid and not root"
> + return
> + fi
> + perf stat --per-die -a -o "${stat_output}" true
> + commachecker --per-die
> + echo "[Success]"
> +}
> +
> +check_per_node()
> +{
> + echo -n "Checking STD output: per node "
> + if ParanoidAndNotRoot 0
> + then
> + echo "[Skip] paranoid and not root"
> + return
> + fi
> + perf stat --per-node -a -o "${stat_output}" true
> + commachecker --per-node
> + echo "[Success]"
> +}
> +
> +check_per_socket()
> +{
> + echo -n "Checking STD output: per socket "
> + if ParanoidAndNotRoot 0
> + then
> + echo "[Skip] paranoid and not root"
> + return
> + fi
> + perf stat --per-socket -a -o "${stat_output}" true
> + 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
> +}
Tests, great! This logic is taken from
tools/perf/tests/shell/stat+csv_output.sh, could we share the
implementation between that and here by moving the code into something
in the lib directory?
Thanks,
Ian
> +
> +check_for_topology
> +check_no_args
> +check_system_wide
> +check_interval
> +check_per_thread
> +check_per_node
> +if [ $skip_test -ne 1 ]
> +then
> + check_system_wide_no_aggr
> + check_per_core
> + check_per_cache_instance
> + 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
> +cleanup
> +exit 0
> --
> 2.35.1
>
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