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Message-Id: <20220525053814.3265216-4-irogers@google.com>
Date: Tue, 24 May 2022 22:38:14 -0700
From: Ian Rogers <irogers@...gle.com>
To: Peter Zijlstra <peterz@...radead.org>,
Ingo Molnar <mingo@...hat.com>,
Arnaldo Carvalho de Melo <acme@...nel.org>,
Mark Rutland <mark.rutland@....com>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
Jiri Olsa <jolsa@...nel.org>,
Namhyung Kim <namhyung@...nel.org>,
Kan Liang <kan.liang@...ux.intel.com>,
Zhengjun Xing <zhengjun.xing@...ux.intel.com>,
Sandipan Das <sandipan.das@....com>,
Claire Jensen <cjense@...gle.com>, Alyssa Ross <hi@...ssa.is>,
Like Xu <likexu@...cent.com>,
James Clark <james.clark@....com>,
Florian Fischer <florian.fischer@...q.space>,
linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org,
Claire Jensen <clairej735@...il.com>
Cc: Stephane Eranian <eranian@...gle.com>
Subject: [PATCH v4 3/3] perf test: Json format checking
From: Claire Jensen <cjense@...gle.com>
Add field checking tests for perf stat JSON output.
Sanity checks the expected number of fields are present, that the
expected keys are present and they have the correct values.
Signed-off-by: Claire Jensen <cjense@...gle.com>
---
.../tests/shell/lib/perf_json_output_lint.py | 94 +++++++++++
tools/perf/tests/shell/stat+json_output.sh | 147 ++++++++++++++++++
2 files changed, 241 insertions(+)
create mode 100644 tools/perf/tests/shell/lib/perf_json_output_lint.py
create mode 100755 tools/perf/tests/shell/stat+json_output.sh
diff --git a/tools/perf/tests/shell/lib/perf_json_output_lint.py b/tools/perf/tests/shell/lib/perf_json_output_lint.py
new file mode 100644
index 000000000000..19477a5f1558
--- /dev/null
+++ b/tools/perf/tests/shell/lib/perf_json_output_lint.py
@@ -0,0 +1,94 @@
+#!/usr/bin/python
+# SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
+# Basic sanity check of perf JSON output as specified in the man page.
+
+import argparse
+import sys
+import json
+
+ap = argparse.ArgumentParser()
+ap.add_argument('--no-args', action='store_true')
+ap.add_argument('--interval', action='store_true')
+ap.add_argument('--system-wide-no-aggr', action='store_true')
+ap.add_argument('--system-wide', action='store_true')
+ap.add_argument('--event', action='store_true')
+ap.add_argument('--per-core', action='store_true')
+ap.add_argument('--per-thread', action='store_true')
+ap.add_argument('--per-die', action='store_true')
+ap.add_argument('--per-node', action='store_true')
+ap.add_argument('--per-socket', action='store_true')
+args = ap.parse_args()
+
+Lines = sys.stdin.readlines()
+
+def isfloat(num):
+ try:
+ float(num)
+ return True
+ except ValueError:
+ return False
+
+
+def isint(num):
+ try:
+ int(num)
+ return True
+ except ValueError:
+ return False
+
+def is_counter_value(num):
+ return isfloat(num) or num == '<not counted>' or num == '<not supported>'
+
+def check_json_output(expected_items):
+ if expected_items != -1:
+ for line in Lines:
+ if 'failed' not in line:
+ count = 0
+ count = line.count(',')
+ if count != expected_items and count == 1 and 'metric-value' in line:
+ # Events that generate >1 metric may have isolated metric values.
+ continue
+ if count != expected_items:
+ raise RuntimeError(f'wrong number of fields. counted {count} expected {expected_items}'
+ f' in \'{line}\'')
+ checks = {
+ 'aggregate-number': lambda x: isfloat(x),
+ 'core': lambda x: True,
+ 'counter-value': lambda x: is_counter_value(x),
+ 'cgroup': lambda x: True,
+ 'cpu': lambda x: isint(x),
+ 'die': lambda x: True,
+ 'event': lambda x: True,
+ 'event-runtime': lambda x: isfloat(x),
+ 'interval': lambda x: isfloat(x),
+ 'metric-unit': lambda x: True,
+ 'metric-value': lambda x: isfloat(x),
+ 'node': lambda x: True,
+ 'pcnt-running': lambda x: isfloat(x),
+ 'socket': lambda x: True,
+ 'thread': lambda x: True,
+ 'unit': lambda x: True,
+ }
+ input = '[\n' + ','.join(Lines) + '\n]'
+ for item in json.loads(input):
+ for key, value in item.items():
+ if key not in checks:
+ raise RuntimeError(f'Unexpected key: key={key} value={value}')
+ if not checks[key](value):
+ raise RuntimeError(f'Check failed for: key={key} value={value}')
+
+
+try:
+ if args.no_args or args.system_wide or args.event:
+ expected_items = 6
+ elif args.interval or args.per_thread or args.system_wide_no_aggr:
+ expected_items = 7
+ elif args.per_core or args.per_socket or args.per_node or args.per_die:
+ expected_items = 8
+ else:
+ # If no option is specified, don't check the number of items.
+ expected_items = -1
+ check_json_output(expected_items)
+except:
+ print('Test failed for input:\n' + '\n'.join(Lines))
+ raise
diff --git a/tools/perf/tests/shell/stat+json_output.sh b/tools/perf/tests/shell/stat+json_output.sh
new file mode 100755
index 000000000000..7748b677f2f9
--- /dev/null
+++ b/tools/perf/tests/shell/stat+json_output.sh
@@ -0,0 +1,147 @@
+#!/bin/bash
+# perf stat JSON output linter
+# SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
+# Checks various perf stat JSON output commands for the
+# correct number of fields.
+
+set -e
+
+pythonchecker=$(dirname $0)/lib/perf_json_output_lint.py
+if [ "x$PYTHON" == "x" ]
+then
+ if which python3 > /dev/null
+ then
+ PYTHON=python3
+ elif which python > /dev/null
+ then
+ PYTHON=python
+ else
+ echo Skipping test, python not detected please set environment variable PYTHON.
+ exit 2
+ fi
+fi
+
+# 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 json output: no args "
+ perf stat -j true 2>&1 | $PYTHON $pythonchecker --no-args
+ echo "[Success]"
+}
+
+check_system_wide()
+{
+ echo -n "Checking json output: system wide "
+ if ParanoidAndNotRoot 0
+ then
+ echo "[Skip] parnoia and not root"
+ return
+ fi
+ perf stat -j -a true 2>&1 | $PYTHON $pythonchecker --system-wide
+ echo "[Success]"
+}
+
+check_system_wide_no_aggr()
+{
+ echo -n "Checking json output: system wide "
+ if ParanoidAndNotRoot 0
+ then
+ echo "[Skip] parnoia and not root"
+ return
+ fi
+ echo -n "Checking json output: system wide no aggregation "
+ perf stat -j -A -a --no-merge true 2>&1 | $PYTHON $pythonchecker --system-wide-no-aggr
+ echo "[Success]"
+}
+
+check_interval()
+{
+ echo -n "Checking json output: interval "
+ perf stat -j -I 1000 true 2>&1 | $PYTHON $pythonchecker --interval
+ echo "[Success]"
+}
+
+
+check_event()
+{
+ echo -n "Checking json output: event "
+ perf stat -j -e cpu-clock true 2>&1 | $PYTHON $pythonchecker --event
+ echo "[Success]"
+}
+
+check_per_core()
+{
+ echo -n "Checking json output: per core "
+ if ParanoidAndNotRoot 0
+ then
+ echo "[Skip] parnoia and not root"
+ return
+ fi
+ perf stat -j --per-core -a true 2>&1 | $PYTHON $pythonchecker --per-core
+ echo "[Success]"
+}
+
+check_per_thread()
+{
+ echo -n "Checking json output: per thread "
+ if ParanoidAndNotRoot 0
+ then
+ echo "[Skip] parnoia and not root"
+ return
+ fi
+ perf stat -j --per-thread -a true 2>&1 | $PYTHON $pythonchecker --per-thread
+ echo "[Success]"
+}
+
+check_per_die()
+{
+ echo -n "Checking json output: per die "
+ if ParanoidAndNotRoot 0
+ then
+ echo "[Skip] parnoia and not root"
+ return
+ fi
+ perf stat -j --per-die -a true 2>&1 | $PYTHON $pythonchecker --per-die
+ echo "[Success]"
+}
+
+check_per_node()
+{
+ echo -n "Checking json output: per node "
+ if ParanoidAndNotRoot 0
+ then
+ echo "[Skip] parnoia and not root"
+ return
+ fi
+ perf stat -j --per-node -a true 2>&1 | $PYTHON $pythonchecker --per-node
+ echo "[Success]"
+}
+
+check_per_socket()
+{
+ echo -n "Checking json output: per socket "
+ if ParanoidAndNotRoot 0
+ then
+ echo "[Skip] parnoia and not root"
+ return
+ fi
+ perf stat -j --per-socket -a true 2>&1 | $PYTHON $pythonchecker --per-socket
+ echo "[Success]"
+}
+
+check_no_args
+check_system_wide
+check_system_wide_no_aggr
+check_interval
+check_event
+check_per_core
+check_per_thread
+check_per_die
+check_per_node
+check_per_socket
+exit 0
--
2.36.1.124.g0e6072fb45-goog
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