{"id":10301,"url":"https://patchwork.libcamera.org/api/1.1/patches/10301/?format=json","web_url":"https://patchwork.libcamera.org/patch/10301/","project":{"id":1,"url":"https://patchwork.libcamera.org/api/1.1/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":"<20201029101629.61798-6-paul.elder@ideasonboard.com>","date":"2020-10-29T10:16:28","name":"[libcamera-devel,v3,5/6] utils: tracepoints: Add simple statistics script","commit_ref":null,"pull_url":null,"state":"accepted","archived":false,"hash":"b040a23de34e27e8392df16676967283d64b480e","submitter":{"id":17,"url":"https://patchwork.libcamera.org/api/1.1/people/17/?format=json","name":"Paul Elder","email":"paul.elder@ideasonboard.com"},"delegate":null,"mbox":"https://patchwork.libcamera.org/patch/10301/mbox/","series":[{"id":1432,"url":"https://patchwork.libcamera.org/api/1.1/series/1432/?format=json","web_url":"https://patchwork.libcamera.org/project/libcamera/list/?series=1432","date":"2020-10-29T10:16:23","name":"Tracing","version":3,"mbox":"https://patchwork.libcamera.org/series/1432/mbox/"}],"comments":"https://patchwork.libcamera.org/api/patches/10301/comments/","check":"pending","checks":"https://patchwork.libcamera.org/api/patches/10301/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 71335BDB9B\n\tfor ;\n\tThu, 29 Oct 2020 10:16:52 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 3F5046289D;\n\tThu, 29 Oct 2020 11:16:52 +0100 (CET)","from perceval.ideasonboard.com (perceval.ideasonboard.com\n\t[IPv6:2001:4b98:dc2:55:216:3eff:fef7:d647])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id EFA9B628BF\n\tfor ;\n\tThu, 29 Oct 2020 11:16:49 +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 8383A527;\n\tThu, 29 Oct 2020 11:16:48 +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=\"Xsd2XpnZ\"; dkim-atps=neutral","DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com;\n\ts=mail; t=1603966609;\n\tbh=PpjVvGziD0VNQq6Y8hEJvtg3OTTrnFtQxH9dJCSGwdo=;\n\th=From:To:Cc:Subject:Date:In-Reply-To:References:From;\n\tb=Xsd2XpnZMBzkLDtWg7m8/I9Yyr7OvNAUlVJtwHA7ByNjQH9THr+KHAQ+8fGWBBw79\n\tS/s+XOuAC+tGBwxXircWGMt1D2LvJ0nskX5KcpVLTpaYr/Wzn0Psryp3ho64PeylIO\n\t6Y0gjcp5ApTppzui/jkHkJTm5/Wlvk2lgkUyhcx8=","From":"Paul Elder ","To":"libcamera-devel@lists.libcamera.org","Date":"Thu, 29 Oct 2020 19:16:28 +0900","Message-Id":"<20201029101629.61798-6-paul.elder@ideasonboard.com>","X-Mailer":"git-send-email 2.27.0","In-Reply-To":"<20201029101629.61798-1-paul.elder@ideasonboard.com>","References":"<20201029101629.61798-1-paul.elder@ideasonboard.com>","MIME-Version":"1.0","Subject":"[libcamera-devel] [PATCH v3 5/6] 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---\nI'll fix output indentation in the next version.\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.py | 66 ++++++++++++++++++++++++++++++++++++\n 1 file changed, 66 insertions(+)\n create mode 100755 utils/tracepoints/analyze.py","diff":"diff --git a/utils/tracepoints/analyze.py b/utils/tracepoints/analyze.py\nnew file mode 100755\nindex 00000000..43da9b1f\n--- /dev/null\n+++ b/utils/tracepoints/analyze.py\n@@ -0,0 +1,66 @@\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.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+ print('pipeline:function\\t:\\tmin\\tmax\\tmean\\tstddev')\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+ print(f'{k}\\t:\\t{minv}\\t{maxv}\\t{mean}\\t{stddev}')\n+\n+\n+if __name__ == '__main__':\n+ sys.exit(main(sys.argv))\n","prefixes":["libcamera-devel","v3","5/6"]}