record_weak_term.sh

 1#!/bin/bash
 2# record weak terms
 3# SPDX-License-Identifier: GPL-2.0
 4# Test that command line options override weak terms from sysfs or inbuilt json.
 5set -e
 6
 7shelldir=$(dirname "$0")
 8# shellcheck source=lib/setup_python.sh
 9. "${shelldir}"/lib/setup_python.sh
10
11# Find the first event with a specified period, such as
12# "cpu_core/event=0x24,period=200003,umask=0xff/"
13event=$(perf list --json | $PYTHON -c '
14import json, sys
15for e in json.load(sys.stdin):
16    if "EventName" not in e or "/modifier" in e["EventName"]:
17        continue
18    if "Encoding" in e and "period=" in e["Encoding"]:
19        print(e["EventName"])
20        break
21')
22if [[ "$event" = "" ]]
23then
24  echo "Skip: No sysfs/json events with inbuilt period."
25  exit 2
26fi
27
28echo "Testing that for $event the period is overridden with 1000"
29perf list --detail "$event"
30if ! perf record -c 1000 -vv -e "$event" -o /dev/null true 2>&1 | \
31  grep -q -F '{ sample_period, sample_freq }   1000'
32then
33  echo "Fail: Unexpected verbose output and sample period"
34  exit 1
35fi
36echo "Success"
37exit 0