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{ "id": 10301, "url": "https://patchwork.libcamera.org/api/patches/10301/?format=api", "web_url": "https://patchwork.libcamera.org/patch/10301/", "project": { "id": 1, "url": "https://patchwork.libcamera.org/api/projects/1/?format=api", "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/people/17/?format=api", "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/series/1432/?format=api", "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": "<libcamera-devel-bounces@lists.libcamera.org>", "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 <parsemail@patchwork.libcamera.org>;\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 <libcamera-devel@lists.libcamera.org>;\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 <paul.elder@ideasonboard.com>", "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": "<libcamera-devel.lists.libcamera.org>", "List-Unsubscribe": "<https://lists.libcamera.org/options/libcamera-devel>,\n\t<mailto:libcamera-devel-request@lists.libcamera.org?subject=unsubscribe>", "List-Archive": "<https://lists.libcamera.org/pipermail/libcamera-devel/>", "List-Post": "<mailto:libcamera-devel@lists.libcamera.org>", "List-Help": "<mailto:libcamera-devel-request@lists.libcamera.org?subject=help>", "List-Subscribe": "<https://lists.libcamera.org/listinfo/libcamera-devel>,\n\t<mailto:libcamera-devel-request@lists.libcamera.org?subject=subscribe>", "Content-Type": "text/plain; charset=\"us-ascii\"", "Content-Transfer-Encoding": "7bit", "Errors-To": "libcamera-devel-bounces@lists.libcamera.org", "Sender": "\"libcamera-devel\" <libcamera-devel-bounces@lists.libcamera.org>" }, "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 <paul.elder@ideasonboard.com>\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 <paul.elder@ideasonboard.com>\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" ] }