tools/perf/tests/shell/stat+json_output.sh

Source file repositories/reference/linux-study-clean/tools/perf/tests/shell/stat+json_output.sh

File Facts

System
Linux kernel
Corpus path
tools/perf/tests/shell/stat+json_output.sh
Extension
.sh
Size
5560 bytes
Lines
237
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: tools
Status
atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

#!/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

skip_test=0

shelldir=$(dirname "$0")
# shellcheck source=lib/setup_python.sh
. "${shelldir}"/lib/setup_python.sh
pythonchecker=$(dirname $0)/lib/perf_json_output_lint.py

stat_output=$(mktemp /tmp/__perf_test.stat_output.json.XXXXX)

cleanup() {
  rm -f "${stat_output}"

  trap - EXIT TERM INT
}

trap_cleanup() {
  cleanup
  exit 1
}
trap trap_cleanup EXIT TERM INT

# 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 -o "${stat_output}" true
	$PYTHON $pythonchecker --no-args --file "${stat_output}"
	echo "[Success]"
}

check_system_wide()
{
	echo -n "Checking json output: system wide "
	if ParanoidAndNotRoot 0
	then
		echo "[Skip] paranoia and not root"
		return
	fi
	perf stat -j -a -o "${stat_output}" true
	$PYTHON $pythonchecker --system-wide --file "${stat_output}"
	echo "[Success]"
}

check_system_wide_no_aggr()
{
	echo -n "Checking json output: system wide no aggregation "
	if ParanoidAndNotRoot 0
	then
		echo "[Skip] paranoia and not root"
		return
	fi
	perf stat -j -A -a --no-merge -o "${stat_output}" true
	$PYTHON $pythonchecker --system-wide-no-aggr --file "${stat_output}"
	echo "[Success]"
}

check_interval()

Annotation

Implementation Notes