[PATCH 1/1] perf test: Add test for CSV output.

[Claire Jensen <cjense@google.com>]

Add field checking tests for perf stat CSV output. Counts expected
fields for various commands. No testing added for summary mode
since it is broken.

An example of the summary output is:

         summary,263831,,instructions:u,1435072,100.0,0.46,insn per cycle
,,,,,1.37,stalled cycles per insn

This should be:

         summary,263831,,instructions:u,1435072,100.0,0.46,insn per cycle
         summary,,,,,,1.37,stalled cycles per insn

The output has 7 fields when it should have 8. Additionally, the newline
spacing is wrong, so it was excluded from testing until a fix is made.
---
 .../tests/shell/lib/perf_csv_output_lint.py   |  55 ++++++++
 tools/perf/tests/shell/stat+csv_output.sh     | 117 ++++++++++++++++++
 2 files changed, 172 insertions(+)
 create mode 100644 tools/perf/tests/shell/lib/perf_csv_output_lint.py
 create mode 100644 tools/perf/tests/shell/stat+csv_output.sh

diff --git a/tools/perf/tests/shell/lib/perf_csv_output_lint.py b/tools/perf/tests/shell/lib/perf_csv_output_lint.py
new file mode 100644
index 000000000000..ef8a32c3523c
--- /dev/null
+++ b/tools/perf/tests/shell/lib/perf_csv_output_lint.py
@@ -0,0 +1,55 @@
+#!/usr/bin/python
+# SPDX-License-Identifier: GPL-2.0
+
+from __future__ import print_function
+import argparse
+import sys
+
+# Basic sanity check of perf CSV output as specified in the man page.
+# Currently just checks the number of fields per line in output.
+
+ap = argparse.ArgumentParser()
+ap.add_argument('--no-args', action='store_true')
+ap.add_argument('--interval', action='store_true')
+ap.add_argument('--all-cpus-no-aggr', action='store_true')
+ap.add_argument('--all-cpus', 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')
+ap.add_argument('--separator', const=',', nargs='?')
+args = ap.parse_args()
+
+Lines = sys.stdin.readlines()
+ch = args.separator
+
+
+def check_csv_output(exp):
+  for line in Lines:
+    if 'failed' not in line:
+      count = 0
+      count = line.count(args.separator)
+      if count != exp:
+        sys.stdout.write(''.join(Lines))
+        raise RuntimeError('wrong number of fields.'
+                           ' expected {0} in {1}\n'.format(exp, line))
+
+try:
+  if args.no_args or args.all_cpus or args.event:
+    check_csv_output(6)
+
+  if args.interval or args.per_thread:
+    check_csv_output(7)
+
+  if args.per_core or args.per_socket or args.per_node or args.per_die:
+    check_csv_output(8)
+
+except:
+  sys.stdout.write('Test failed for input: ' + ''.join(Lines))
+  raise
+
+
+
+
diff --git a/tools/perf/tests/shell/stat+csv_output.sh b/tools/perf/tests/shell/stat+csv_output.sh
new file mode 100644
index 000000000000..282f9547e7be
--- /dev/null
+++ b/tools/perf/tests/shell/stat+csv_output.sh
@@ -0,0 +1,117 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+
+# perf stat csv output test
+# Tests various perf stat CSV output commands for the
+# correct number of fields and the CSV separator set to ','.
+
+set -e
+
+pythonchecker=$(dirname $0)/lib/perf_csv_output_lint.py
+file="/proc/sys/kernel/perf_event_paranoid"
+paranoia=$(cat "$file" | grep -o -E '[0-9]+')
+echo $paranoia
+
+check_no_args()
+{
+	perf stat -x, sleep 1 2>&1 | \
+	python $pythonchecker --no-args --separator
+}
+
+if [ $paranoia -gt 0 ];
+then
+	echo check_all_cpus test skipped because of paranoia level.
+else
+	check_all_cpus()
+	{
+		perf stat -x, -a 2>&1 sleep 1 | \
+		python $pythonchecker --all-cpus --separator
+	}
+	check_all_cpus
+fi
+
+check_interval()
+{
+	perf stat -x, -I 1000 2>&1 sleep 1 | \
+	python $pythonchecker --interval --separator
+}
+
+check_all_cpus_no_aggr()
+{
+	perf stat -x, -A -a --no-merge 2>&1 sleep 1 | \
+	python $pythonchecker --all-cpus-no-aggr --separator
+}
+
+check_event()
+{
+	perf stat -x, -e cpu-clock 2>&1 sleep 1 | \
+	python $pythonchecker --event --separator
+}
+
+if [ $paranoia -gt 0 ];
+then
+	echo check_all_cpus test skipped because of paranoia level.
+else
+	check_per_core()
+	{
+		perf stat -x, --per-core -a 2>&1 sleep 1 | \
+		python $pythonchecker --per-core --separator
+	}
+	check_per_core
+fi
+
+if [ $paranoia -gt 0 ];
+then
+	echo check_all_cpus test skipped because of paranoia level.
+else
+	check_per_thread()
+	{
+		perf stat -x, --per-thread -a 2>&1 sleep 1 | \
+		python $pythonchecker --per-thread --separator
+	}
+	check_per_thread
+fi
+
+if [ $paranoia -gt 0 ];
+then
+	echo check_per_die test skipped because of paranoia level.
+else
+	check_per_die()
+	{
+		perf stat -x, --per-die -a 2>&1 sleep 1 | \
+		python $pythonchecker --per-die --separator
+	}
+	check_per_die
+fi
+
+if [ $paranoia -gt 0 ];
+then
+	echo check_per_node test skipped because of paranoia level.
+else
+	check_per_node()
+	{
+		perf stat -x, --per-node -a 2>&1 sleep 1 | \
+		python $pythonchecker --per-node --separator
+	}
+	check_per_node
+fi
+
+if [ $paranoia -gt 0 ];
+then
+	echo check_per_socket test skipped because of paranoia level.
+else
+	check_per_socket()
+	{
+		perf stat -x, --per-socket -a 2>&1 sleep 1 | \
+		python $pythonchecker --per-socket --separator
+	}
+	check_per_socket
+fi
+
+check_no_args
+check_interval
+check_all_cpus_no_aggr
+check_event
+
+exit 0
+
-- 
2.32.0.605.g8dce9f2422-goog