{"id":10309,"url":"https://patchwork.libcamera.org/api/patches/10309/?format=json","web_url":"https://patchwork.libcamera.org/patch/10309/","project":{"id":1,"url":"https://patchwork.libcamera.org/api/projects/1/?format=json","name":"libcamera","link_name":"libcamera","list_id":"libcamera_core","list_email":"libcamera-devel@lists.libcamera.org","web_url":"","scm_url":"","webscm_url":""},"msgid":"<20201030085756.79329-5-paul.elder@ideasonboard.com>","date":"2020-10-30T08:57:55","name":"[libcamera-devel,v4,4/5] utils: tracepoints: Add simple statistics script","commit_ref":null,"pull_url":null,"state":"accepted","archived":false,"hash":"e89b91f2a16e1d69216816c0d4dce97e5c9c182e","submitter":{"id":17,"url":"https://patchwork.libcamera.org/api/people/17/?format=json","name":"Paul Elder","email":"paul.elder@ideasonboard.com"},"delegate":null,"mbox":"https://patchwork.libcamera.org/patch/10309/mbox/","series":[{"id":1435,"url":"https://patchwork.libcamera.org/api/series/1435/?format=json","web_url":"https://patchwork.libcamera.org/project/libcamera/list/?series=1435","date":"2020-10-30T08:57:51","name":"Tracing","version":4,"mbox":"https://patchwork.libcamera.org/series/1435/mbox/"}],"comments":"https://patchwork.libcamera.org/api/patches/10309/comments/","check":"pending","checks":"https://patchwork.libcamera.org/api/patches/10309/checks/","tags":{},"headers":{"Return-Path":"","X-Original-To":"parsemail@patchwork.libcamera.org","Delivered-To":"parsemail@patchwork.libcamera.org","Received":["from lancelot.ideasonboard.com (lancelot.ideasonboard.com\n\t[92.243.16.209])\n\tby patchwork.libcamera.org (Postfix) with ESMTPS id AC1D9BDB1E\n\tfor ;\n\tFri, 30 Oct 2020 08:58:14 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 7379C62993;\n\tFri, 30 Oct 2020 09:58:14 +0100 (CET)","from perceval.ideasonboard.com (perceval.ideasonboard.com\n\t[213.167.242.64])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id C92D462989\n\tfor ;\n\tFri, 30 Oct 2020 09:58:12 +0100 (CET)","from pyrite.rasen.tech (unknown\n\t[IPv6:2400:4051:61:600:2c71:1b79:d06d:5032])\n\tby perceval.ideasonboard.com (Postfix) with ESMTPSA id 62DD69B7;\n\tFri, 30 Oct 2020 09:58:11 +0100 (CET)"],"Authentication-Results":"lancelot.ideasonboard.com;\n\tdkim=fail reason=\"signature verification failed\" (1024-bit key;\n\tunprotected) header.d=ideasonboard.com header.i=@ideasonboard.com\n\theader.b=\"uPCmpeiW\"; dkim-atps=neutral","DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com;\n\ts=mail; t=1604048292;\n\tbh=NggESQQjOGLezqZG4Eaf/+OnHf4qqL3sgBns2AH90LI=;\n\th=From:To:Cc:Subject:Date:In-Reply-To:References:From;\n\tb=uPCmpeiWetgZYG4I6W68kZ1KA6HvHv77CKjzEH2mSscZMA4sNqmaxWooaip/ORoed\n\tH7hLDEa2/n7odRXHp8jwLTTlEjvwrPr8tLbd9blKRRKfmzTgku+mr8uXHo/EpQIcjO\n\t2rL8CvxamzuTVSKb1nFnOGfFt/Fi63C27g1JESJU=","From":"Paul Elder ","To":"libcamera-devel@lists.libcamera.org","Date":"Fri, 30 Oct 2020 17:57:55 +0900","Message-Id":"<20201030085756.79329-5-paul.elder@ideasonboard.com>","X-Mailer":"git-send-email 2.27.0","In-Reply-To":"<20201030085756.79329-1-paul.elder@ideasonboard.com>","References":"<20201030085756.79329-1-paul.elder@ideasonboard.com>","MIME-Version":"1.0","Subject":"[libcamera-devel] [PATCH v4 4/5] utils: tracepoints: Add simple\n\tstatistics script","X-BeenThere":"libcamera-devel@lists.libcamera.org","X-Mailman-Version":"2.1.29","Precedence":"list","List-Id":"","List-Unsubscribe":",\n\t","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n\t","Content-Type":"text/plain; charset=\"us-ascii\"","Content-Transfer-Encoding":"7bit","Errors-To":"libcamera-devel-bounces@lists.libcamera.org","Sender":"\"libcamera-devel\" "},"content":"Add a script that scans a trace for IPA call tracepoints, and returns\nstatistics on the time taken for IPA calls.\n\nSigned-off-by: Paul Elder \n\n---\nChanges in v4:\n- rename script to analyze-ipa-trace.py\n- align output stats table\n\nChanges in v3:\n- check for the new tracepoint names, ipa_call_begin and ipa_call_end\n- fix babeltrace2 parsing in the case that the event doesn't have a\n pipeline_name field\n- change script description\n- add argparse description\n- add example for trace_path argument\n- change double quotes to single quotes\n\nNew in v2\n---\n utils/tracepoints/analyze-ipa-trace.py | 77 ++++++++++++++++++++++++++\n 1 file changed, 77 insertions(+)\n create mode 100755 utils/tracepoints/analyze-ipa-trace.py","diff":"diff --git a/utils/tracepoints/analyze-ipa-trace.py b/utils/tracepoints/analyze-ipa-trace.py\nnew file mode 100755\nindex 00000000..50fbbf42\n--- /dev/null\n+++ b/utils/tracepoints/analyze-ipa-trace.py\n@@ -0,0 +1,77 @@\n+#!/usr/bin/env python3\n+# SPDX-License-Identifier: GPL-2.0-or-later\n+# Copyright (C) 2020, Google Inc.\n+#\n+# Author: Paul Elder \n+#\n+# analyze-ipa-trace.py - Example of how to extract information from libcamera lttng traces\n+\n+import argparse\n+import bt2\n+import statistics as stats\n+import sys\n+\n+# pipeline -> {function -> stack(timestamps)}\n+timestamps = {}\n+\n+# pipeline:function -> samples[]\n+samples = {}\n+\n+def main(argv):\n+ parser = argparse.ArgumentParser(\n+ description='A simple analysis script to get statistics on time taken for IPA calls')\n+ parser.add_argument('-p', '--pipeline', type=str,\n+ help='Name of pipeline to filter for')\n+ parser.add_argument('trace_path', type=str,\n+ help='Path to lttng trace (eg. ~/lttng-traces/demo-20201029-184003)')\n+ args = parser.parse_args(argv[1:])\n+\n+ traces = bt2.TraceCollectionMessageIterator(args.trace_path)\n+ for msg in traces:\n+ if type(msg) is not bt2._EventMessageConst or \\\n+ 'pipeline_name' not in msg.event.payload_field or \\\n+ (args.pipeline is not None and \\\n+ msg.event.payload_field['pipeline_name'] != args.pipeline):\n+ continue\n+\n+ pipeline = msg.event.payload_field['pipeline_name']\n+ event = msg.event.name\n+ func = msg.event.payload_field['function_name']\n+ timestamp_ns = msg.default_clock_snapshot.ns_from_origin\n+\n+ if event == 'libcamera:ipa_call_begin':\n+ if pipeline not in timestamps:\n+ timestamps[pipeline] = {}\n+ if func not in timestamps[pipeline]:\n+ timestamps[pipeline][func] = []\n+ timestamps[pipeline][func].append(timestamp_ns)\n+\n+ if event == 'libcamera:ipa_call_end':\n+ ts = timestamps[pipeline][func].pop()\n+ key = f'{pipeline}:{func}'\n+ if key not in samples:\n+ samples[key] = []\n+ samples[key].append(timestamp_ns - ts)\n+\n+ # Compute stats\n+ rows = []\n+ rows.append(['pipeline:function', 'min', 'max', 'mean', 'stddev'])\n+ for k, v in samples.items():\n+ mean = int(stats.mean(v))\n+ stddev = int(stats.stdev(v))\n+ minv = min(v)\n+ maxv = max(v)\n+ rows.append([k, str(minv), str(maxv), str(mean), str(stddev)])\n+\n+ # Get maximum string width for every column\n+ widths = []\n+ for i in range(len(rows[0])):\n+ widths.append(max([len(row[i]) for row in rows]))\n+\n+ # Print stats table\n+ for row in rows:\n+ fmt = [row[i].rjust(widths[i]) for i in range(1, 5)]\n+ print('{} {} {} {} {}'.format(row[0].ljust(widths[0]), *fmt))\n+\n+if __name__ == '__main__':\n+ sys.exit(main(sys.argv))\n","prefixes":["libcamera-devel","v4","4/5"]}