linux-kernel - [PATCH v2 1/7] scripts: python: Extact necessary information from process event

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Date:   Thu, 6 Jul 2023 01:12:23 +0530
From:   Anup Sharma <anupnewsmail@...il.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>,
        Ian Rogers <irogers@...gle.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Anup Sharma <anupnewsmail@...il.com>,
        linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2 1/7] scripts: python: Extact necessary information from
 process event

The script takes in a sample event dictionary(param_dict) and retrieves
relevant data such as time stamp, PID, TID, thread name, and call stack
information. If available, the call stack is parsed to include function
names and the associated DSO, which are requires for creating json schema.
Also few libaries has been included which will be used in later commit.

Signed-off-by: Anup Sharma <anupnewsmail@...il.com>
---
 .../scripts/python/firefox-gecko-converter.py | 37 +++++++++++++++++++
 1 file changed, 37 insertions(+)
 create mode 100644 tools/perf/scripts/python/firefox-gecko-converter.py

diff --git a/tools/perf/scripts/python/firefox-gecko-converter.py b/tools/perf/scripts/python/firefox-gecko-converter.py
new file mode 100644
index 000000000000..ce663840d212
--- /dev/null
+++ b/tools/perf/scripts/python/firefox-gecko-converter.py
@@ -0,0 +1,37 @@
+#!/usr/bin/env python3
+# SPDX-License-Identifier: GPL-2.0
+#
+# Usage:
+#
+#     perf record -a -g -F 99 sleep 1
+#     perf script firefox-gecko-converter.py
+
+from __future__ import print_function
+import os
+import sys
+import json
+from functools import reduce
+
+sys.path.append(os.environ['PERF_EXEC_PATH'] + \
+	'/scripts/python/Perf-Trace-Util/lib/Perf/Trace')
+
+from perf_trace_context import *
+from Core import *
+
+def process_event(param_dict):
+	time_stamp = (param_dict['sample']['time'] // 1000) / 1000
+	pid = param_dict['sample']['pid']
+	tid = param_dict['sample']['tid']
+	thread_name = param_dict['comm']
+	start_time = time_stamp if not start_time else start_time
+	if param_dict['callchain']:
+		stack = []
+		for call in param_dict['callchain']:
+			if 'sym' not in call:
+				continue
+			stack.append(call['sym']['name'] + f' (in {call["dso"]})')
+		if len(stack) != 0:
+			stack = stack[::-1]
+	else:
+		mod = param_dict['symbol'] if 'symbol' in param_dict else '[unknown]'
+		dso = param_dict['dso'] if 'dso' in param_dict else '[unknown]'
-- 
2.34.1