#!/usr/bin/env python3 # SPDX-License-Identifier: GPL-2.0-or-later # Copyright (C) 2020, Google Inc. # # Author: Paul Elder <paul.elder@ideasonboard.com> # # analyze-ipa-trace.py - Example of how to extract information from libcamera lttng traces import argparse import bt2 import statistics as stats import sys # pipeline -> {function -> stack(timestamps)} timestamps = {} # pipeline:function -> samples[] samples = {} def main(argv): parser = argparse.ArgumentParser( description='A simple analysis script to get statistics on time taken for IPA calls') parser.add_argument('-p', '--pipeline', type=str, help='Name of pipeline to filter for') parser.add_argument('trace_path', type=str, help='Path to lttng trace (eg. ~/lttng-traces/demo-20201029-184003)') args = parser.parse_args(argv[1:]) traces = bt2.TraceCollectionMessageIterator(args.trace_path) for msg in traces: if type(msg) is not bt2._EventMessageConst or \ 'pipeline_name' not in msg.event.payload_field or \ (args.pipeline is not None and \ msg.event.payload_field['pipeline_name'] != args.pipeline): continue pipeline = msg.event.payload_field['pipeline_name'] event = msg.event.name func = msg.event.payload_field['function_name'] timestamp_ns = msg.default_clock_snapshot.ns_from_origin if event == 'libcamera:ipa_call_begin': if pipeline not in timestamps: timestamps[pipeline] = {} if func not in timestamps[pipeline]: timestamps[pipeline][func] = [] timestamps[pipeline][func].append(timestamp_ns) if event == 'libcamera:ipa_call_end': ts = timestamps[pipeline][func].pop() key = f'{pipeline}:{func}' if key not in samples: samples[key] = [] samples[key].append(timestamp_ns - ts) # Compute stats rows = [] rows.append(['pipeline:function', 'min', 'max', 'mean', 'stddev']) for k, v in samples.items(): mean = int(stats.mean(v)) stddev = int(stats.stdev(v)) minv = min(v) maxv = max(v) rows.append([k, str(minv), str(maxv), str(mean), str(stddev)]) # Get maximum string width for every column widths = [] for i in range(len(rows[0])): widths.append(max([len(row[i]) for row in rows])) # Print stats table for row in rows: fmt = [row[i].rjust(widths[i]) for i in range(1, 5)] print('{} {} {} {} {}'.format(row[0].ljust(widths[0]), *fmt)) if __name__ == '__main__': sys.exit(main(sys.argv)) ;id=9c2ca46391ea2ba089d5d082a0dbdd3b15b28498'>src</a>/<a href='/libcamera/libcamera.git/tree/src/apps?h=v0.0.4&id=9c2ca46391ea2ba089d5d082a0dbdd3b15b28498'>apps</a>/<a href='/libcamera/libcamera.git/tree/src/apps/qcam?h=v0.0.4&id=9c2ca46391ea2ba089d5d082a0dbdd3b15b28498'>qcam</a>/<a href='/libcamera/libcamera.git/tree/src/apps/qcam/assets?h=v0.0.4&id=9c2ca46391ea2ba089d5d082a0dbdd3b15b28498'>assets</a>/<a href='/libcamera/libcamera.git/tree/src/apps/qcam/assets/feathericons?h=v0.0.4&id=9c2ca46391ea2ba089d5d082a0dbdd3b15b28498'>feathericons</a>/<a href='/libcamera/libcamera.git/tree/src/apps/qcam/assets/feathericons/camera.svg?h=v0.0.4&id=9c2ca46391ea2ba089d5d082a0dbdd3b15b28498'>camera.svg</a></div><div class='content'>blob: 0e7f06037ab0ee331040c5c0ada5dadafb9f4591 (<a href='/libcamera/libcamera.git/plain/src/apps/qcam/assets/feathericons/camera.svg?h=v0.0.4&id=9c2ca46391ea2ba089d5d082a0dbdd3b15b28498'>plain</a>) <table summary='blob content' class='blob'> <tr><td class='linenumbers'><pre><a id='n1' href='#n1'>1</a> </pre></td> <td class='lines'><pre><code><span class="hl kwa"><svg</span> <span class="hl kwb">xmlns</span>=<span class="hl str">"http://www.w3.org/2000/svg"</span> <span class="hl kwb">width</span>=<span class="hl str">"24"</span> <span class="hl kwb">height</span>=<span class="hl str">"24"</span> <span class="hl kwb">viewBox</span>=<span class="hl str">"0 0 24 24"</span> <span class="hl kwb">fill</span>=<span class="hl str">"none"</span> <span class="hl kwb">stroke</span>=<span class="hl str">"currentColor"</span> <span class="hl kwb">stroke-width</span>=<span class="hl str">"2"</span> <span class="hl kwb">stroke-linecap</span>=<span class="hl str">"round"</span> <span class="hl kwb">stroke-linejoin</span>=<span class="hl str">"round"</span> <span class="hl kwb">class</span>=<span class="hl str">"feather feather-camera"</span><span class="hl kwa">><path</span> <span class="hl kwb">d</span>=<span class="hl str">"M23 19a2 2 0 0 1-2 2H3a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h4l2-3h6l2 3h4a2 2 0 0 1 2 2z"</span><span class="hl kwa">></path><circle</span> <span class="hl kwb">cx</span>=<span class="hl str">"12"</span> <span class="hl kwb">cy</span>=<span class="hl str">"13"</span> <span class="hl kwb">r</span>=<span class="hl str">"4"</span><span class="hl kwa">></circle></svg></span> </code></pre></td></tr></table> </div> <!-- class=content --> <div class='footer'>generated by <a href='https://git.zx2c4.com/cgit/about/'>cgit v1.2.1</a> (<a href='https://git-scm.com/'>git 2.18.0</a>) at 2025-03-04 00:19:39 +0000</div> </div> <!-- id=cgit --> </body> </html>