linux-kernel - [PATCH v3 2/6] scripts: python: Extact necessary information from process event

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Message-ID: <ba55bf712cc27494635ca0bb23a21b42529c9327.1689024635.git.anupnewsmail@gmail.com>
Date:   Tue, 11 Jul 2023 04:40:33 +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 v3 2/6] 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. Also start time
is defined.

Signed-off-by: Anup Sharma <anupnewsmail@...il.com>
---
 .../perf/scripts/python/firefox-gecko-converter.py  | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/tools/perf/scripts/python/firefox-gecko-converter.py b/tools/perf/scripts/python/firefox-gecko-converter.py
index 5b342641925c..765f1775cee5 100644
--- a/tools/perf/scripts/python/firefox-gecko-converter.py
+++ b/tools/perf/scripts/python/firefox-gecko-converter.py
@@ -21,8 +21,19 @@ sys.path.append(os.environ['PERF_EXEC_PATH'] + \
 from perf_trace_context import *
 from Core import *
 
+start_time = None
+
 def trace_end():
 	pass
 
 def process_event(param_dict):
-	pass
+	global start_time
+	# Extract relevant information from the event parameters. The event parameters
+	# are in a dictionary:
+	time_stamp = (param_dict['sample']['time'] // 1000) / 1000
+	pid = param_dict['sample']['pid']
+	tid = param_dict['sample']['tid']
+	thread_name = param_dict['comm']
+
+	# Assume that start time is the time of the first event.
+	start_time = time_stamp if not start_time else start_time
-- 
2.34.1