Commit 081006b7 authored by Ian Rogers's avatar Ian Rogers Committed by Namhyung Kim
Browse files

perf test: Add test that command line period overrides sysfs/json values 



The behavior of weak terms is subtle, add a test that they aren't
accidentally broken. The test finds an event with a weak 'period' and
then overrides it. In no such event is present then the test skips.

Signed-off-by: default avatarIan Rogers <irogers@google.com>
Signed-off-by: default avatarNamhyung Kim <namhyung@kernel.org>
parent 0e9b51a4

tools/perf/tests/shell/record_weak_term.sh

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+37 −0
Original line number Diff line number Diff line 
#!/bin/bash

# record weak terms

# SPDX-License-Identifier: GPL-2.0

# Test that command line options override weak terms from sysfs or inbuilt json.

set -e



shelldir=$(dirname "$0")

# shellcheck source=lib/setup_python.sh

. "${shelldir}"/lib/setup_python.sh



# Find the first event with a specified period, such as

# "cpu_core/event=0x24,period=200003,umask=0xff/"

event=$(perf list --json | $PYTHON -c '

import json, sys

for e in json.load(sys.stdin):

    if "EventName" not in e or "/modifier" in e["EventName"]:

        continue

    if "Encoding" in e and "period=" in e["Encoding"]:

        print(e["EventName"])

        break

')

if [[ "$event" = "" ]]

then

  echo "Skip: No sysfs/json events with inbuilt period."

  exit 2

fi



echo "Testing that for $event the period is overridden with 1000"

perf list --detail "$event"

if ! perf record -c 1000 -vv -e "$event" -o /dev/null true 2>&1 | \

  grep -q -F '{ sample_period, sample_freq }   1000'

then

  echo "Fail: Unexpected verbose output and sample period"

  exit 1

fi

echo "Success"

exit 0