668aafb56c
On Linux, Perfetto translates the builtin "ts" timestamp in trace event from CLOCK_MONOTONIC to CLOCK_BOOTTIME, before passing them to devtools. Devtools therefore implicitly operates on timestamps that are in CLOCK_BOOTTIME. However, additional timestamps sent in trace event payload arguments will not be converted to CLOCK_BOOTTIME by Perfetto, raising the possibility of devtools using timestamps from multiple clock domains incorrectly. Since trace events sent by CpuProfile also include the builtin "ts" trace timestamp (sampled from CLOCK_MONOTONIC nearly at the same time by the tracing framework), sending "data.startTime" and "data.endTime" is essentially redundant. devtools-frontend:2113957 stops the use of the value of these timestamps in the payload of Profile and ProfileChunk events. Devtools continue to use the presence of these arguments to indentify start and end profile events. ProfileChunk events also include "timeDeltas" which are relative timestamps. They are also in CLOCK_MONOTONIC and are not translated by Perfetto. devtools-frontend:2113957 computes absolute CLOCK_BOOTTIME timestamps from timeDeltas by adding them to "ts" in the "Profile" event (previously, "data.startTime" was used). This is only valid if the system is not suspended/resumed during profiling. Providing support for suspend/resume in the middle of profiling will likely involve having Perfetto convert "timeDeltas" directly to CLOCK_BOOTTIME. This CL introduces no code changes and only adds comments to explain the above. BUG=chromium:1055871 Change-Id: I649dfcce8ea1a100c0ecfe03f843c7cb1fdd6f33 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2114001 Commit-Queue: Peter Marshall <petermarshall@chromium.org> Reviewed-by: Peter Marshall <petermarshall@chromium.org> Cr-Commit-Position: refs/heads/master@{#66820}
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214 lines
7.6 KiB
Plaintext
# Below is a list of people and organizations that have contributed
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# to the V8 project. Names should be added to the list like so:
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#
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# Name/Organization <email address>
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Google Inc. <*@google.com>
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The Chromium Authors <*@chromium.org>
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Sigma Designs Inc. <*@sdesigns.com>
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ARM Ltd. <*@arm.com>
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Hewlett-Packard Development Company, LP <*@palm.com>
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Igalia, S.L. <*@igalia.com>
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Joyent, Inc. <*@joyent.com>
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Bloomberg Finance L.P. <*@bloomberg.net>
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NVIDIA Corporation <*@nvidia.com>
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BlackBerry Limited <*@blackberry.com>
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Opera Software ASA <*@opera.com>
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Intel Corporation <*@intel.com>
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LG Electronics, Inc. <*@lge.com>
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Microsoft <*@microsoft.com>
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MIPS Technologies, Inc. <*@mips.com>
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Imagination Technologies, LLC <*@imgtec.com>
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Wave Computing, Inc. <*@wavecomp.com>
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Loongson Technology Corporation Limited <*@loongson.cn>
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Code Aurora Forum <*@codeaurora.org>
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Home Jinni Inc. <*@homejinni.com>
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IBM Inc. <*@*.ibm.com>
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IBM Inc. <*@ibm.com>
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Samsung <*@*.samsung.com>
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Samsung <*@samsung.com>
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Joyent, Inc <*@joyent.com>
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RT-RK Computer Based System <*@rt-rk.com>
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Amazon, Inc <*@amazon.com>
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ST Microelectronics <*@st.com>
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Yandex LLC <*@yandex-team.ru>
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StrongLoop, Inc. <*@strongloop.com>
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Facebook, Inc. <*@fb.com>
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Facebook, Inc. <*@oculus.com>
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Vewd Software AS <*@vewd.com>
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Groupon <*@groupon.com>
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Meteor Development Group <*@meteor.com>
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Cloudflare, Inc. <*@cloudflare.com>
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Julia Computing, Inc. <*@juliacomputing.com>
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Aaron Bieber <deftly@gmail.com>
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Abdulla Kamar <abdulla.kamar@gmail.com>
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Akinori MUSHA <knu@FreeBSD.org>
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Alessandro Pignotti <alessandro@leaningtech.com>
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Alex Kodat <akodat@rocketsoftware.com>
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Alexander Botero-Lowry <alexbl@FreeBSD.org>
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Alexander Karpinsky <homm86@gmail.com>
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Alexander Neville <dark@volatile.bz>
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Alexandre Vassalotti <avassalotti@gmail.com>
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Alexis Campailla <alexis@janeasystems.com>
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Allan Sandfeld Jensen <allan.jensen@qt.io>
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Amos Lim <eui-sang.lim@samsung.com>
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Andreas Anyuru <andreas.anyuru@gmail.com>
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Andrew Paprocki <andrew@ishiboo.com>
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Andrei Kashcha <anvaka@gmail.com>
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Anna Henningsen <anna@addaleax.net>
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Anton Bikineev <ant.bikineev@gmail.com>
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Bangfu Tao <bangfu.tao@samsung.com>
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Daniel Shelton <d1.shelton@samsung.com>
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Ben Coe <bencoe@gmail.com>
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Ben Newman <ben@meteor.com>
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Ben Noordhuis <info@bnoordhuis.nl>
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Benjamin Tan <demoneaux@gmail.com>
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Bert Belder <bertbelder@gmail.com>
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Burcu Dogan <burcujdogan@gmail.com>
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Caitlin Potter <caitpotter88@gmail.com>
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Craig Schlenter <craig.schlenter@gmail.com>
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Chengzhong Wu <legendecas@gmail.com>
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Choongwoo Han <cwhan.tunz@gmail.com>
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Chris Nardi <hichris123@gmail.com>
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Christopher A. Taylor <chris@gameclosure.com>
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Colin Ihrig <cjihrig@gmail.com>
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Daniel Andersson <kodandersson@gmail.com>
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Daniel Bevenius <daniel.bevenius@gmail.com>
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Daniel James <dnljms@gmail.com>
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David Carlier <devnexen@gmail.com>
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David Manouchehri <david@davidmanouchehri.com>
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Deepak Mohan <hop2deep@gmail.com>
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Deon Dior <diaoyuanjie@gmail.com>
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Dominic Farolini <domfarolino@gmail.com>
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Douglas Crosher <dtc-v8@scieneer.com>
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Dusan Milosavljevic <dusan.m.milosavljevic@gmail.com>
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Eric Rannaud <eric.rannaud@gmail.com>
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Erich Ocean <erich.ocean@me.com>
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Evan Lucas <evan.lucas@help.com>
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Fedor Indutny <fedor@indutny.com>
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Felix Geisendörfer <haimuiba@gmail.com>
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Filipe David Manana <fdmanana@gmail.com>
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Franziska Hinkelmann <franziska.hinkelmann@gmail.com>
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Geoffrey Garside <ggarside@gmail.com>
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Gergely Nagy <ngg@ngg.hu>
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Gus Caplan <me@gus.host>
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Gwang Yoon Hwang <ryumiel@company100.net>
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Hannu Trey <hannu.trey@gmail.com>
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Henrique Ferreiro <henrique.ferreiro@gmail.com>
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Hirofumi Mako <mkhrfm@gmail.com>
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Honggyu Kim <honggyu.kp@gmail.com>
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Huáng Jùnliàng <jlhwung@gmail.com>
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Iain Ireland <iireland@mozilla.com>
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Ingvar Stepanyan <me@rreverser.com>
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Ioseb Dzmanashvili <ioseb.dzmanashvili@gmail.com>
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Isiah Meadows <impinball@gmail.com>
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Jaime Bernardo <jaime@janeasystems.com>
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Jan de Mooij <jandemooij@gmail.com>
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Jan Krems <jan.krems@gmail.com>
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Janusz Majnert <jmajnert@gmail.com>
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Jay Freeman <saurik@saurik.com>
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James Pike <g00gle@chilon.net>
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James M Snell <jasnell@gmail.com>
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Jianghua Yang <jianghua.yjh@alibaba-inc.com>
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Jiawen Geng <technicalcute@gmail.com>
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Joel Stanley <joel@jms.id.au>
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Johan Bergström <johan@bergstroem.nu>
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Jonathan Liu <net147@gmail.com>
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Julien Brianceau <jbriance@cisco.com>
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JunHo Seo <sejunho@gmail.com>
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Junming Huang <kiminghjm@gmail.com>
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Kang-Hao (Kenny) Lu <kennyluck@csail.mit.edu>
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Karl Skomski <karl@skomski.com>
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Kevin Gibbons <bakkot@gmail.com>
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Kris Selden <kris.selden@gmail.com>
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Kyounga Ra <kyounga@alticast.com>
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Loo Rong Jie <loorongjie@gmail.com>
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Luis Reis <luis.m.reis@gmail.com>
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Luke Zarko <lukezarko@gmail.com>
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Maciej Małecki <me@mmalecki.com>
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Marcin Cieślak <saper@marcincieslak.com>
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Marcin Wiącek <marcin@mwiacek.com>
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Mateusz Czeladka <mateusz.szczap@gmail.com>
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Matheus Marchini <mat@mmarchini.me>
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Matheus Marchini <mmarchini@netflix.com>
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Mathias Bynens <mathias@qiwi.be>
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Matt Hanselman <mjhanselman@gmail.com>
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Matthew Sporleder <msporleder@gmail.com>
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Maxim Mazurok <maxim@mazurok.com>
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Maxim Mossienko <maxim.mossienko@gmail.com>
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Michael Lutz <michi@icosahedron.de>
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Michael Mclaughlin <m8ch88l@gmail.com>
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Michael Smith <mike@w3.org>
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Michaël Zasso <mic.besace@gmail.com>
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Mike Gilbert <floppymaster@gmail.com>
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Mike Pennisi <mike@mikepennisi.com>
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Mikhail Gusarov <dottedmag@dottedmag.net>
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Milton Chiang <milton.chiang@mediatek.com>
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Mu Tao <pamilty@gmail.com>
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Myeong-bo Shim <m0609.shim@samsung.com>
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Nicolas Antonius Ernst Leopold Maria Kaiser <nikai@nikai.net>
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Niklas Hambüchen <mail@nh2.me>
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Noj Vek <nojvek@gmail.com>
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Oleksandr Chekhovskyi <oleksandr.chekhovskyi@gmail.com>
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Oliver Dunk <oliver@oliverdunk.com>
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Paolo Giarrusso <p.giarrusso@gmail.com>
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Patrick Gansterer <paroga@paroga.com>
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Peng Fei <pfgenyun@gmail.com>
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Peng-Yu Chen <pengyu@libstarrify.so>
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Peter Rybin <peter.rybin@gmail.com>
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Peter Varga <pvarga@inf.u-szeged.hu>
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Peter Wong <peter.wm.wong@gmail.com>
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Paul Lind <plind44@gmail.com>
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Pavel Medvedev <pmedvedev@gmail.com>
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PhistucK <phistuck@gmail.com>
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Qingyan Li <qingyan.liqy@alibaba-inc.com>
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Qiuyi Zhang <qiuyi.zqy@alibaba-inc.com>
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Rafal Krypa <rafal@krypa.net>
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Raul Tambre <raul@tambre.ee>
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Ray Glover <ray@rayglover.net>
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Refael Ackermann <refack@gmail.com>
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Rene Rebe <rene@exactcode.de>
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Rick Waldron <waldron.rick@gmail.com>
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Rob Wu <rob@robwu.nl>
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Robert Meijer <robert.s.meijer@gmail.com>
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Robert Mustacchi <rm@fingolfin.org>
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Robert Nagy <robert.nagy@gmail.com>
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Rong Wang <wangrong089@gmail.com>
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Ross Kirsling <rkirsling@gmail.com>
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Ruben Bridgewater <ruben@bridgewater.de>
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Ryan Dahl <ry@tinyclouds.org>
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Sakthipriyan Vairamani (thefourtheye) <thechargingvolcano@gmail.com>
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Sander Mathijs van Veen <sander@leaningtech.com>
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Sandro Santilli <strk@keybit.net>
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Sanjoy Das <sanjoy@playingwithpointers.com>
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Seo Sanghyeon <sanxiyn@gmail.com>
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Shawn Anastasio <shawnanastasio@gmail.com>
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Shawn Presser <shawnpresser@gmail.com>
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Stefan Penner <stefan.penner@gmail.com>
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Sylvestre Ledru <sledru@mozilla.com>
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Taketoshi Aono <brn@b6n.ch>
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Teddy Katz <teddy.katz@gmail.com>
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Tiancheng "Timothy" Gu <timothygu99@gmail.com>
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Tobias Burnus <burnus@net-b.de>
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Tobias Nießen <tniessen@tnie.de>
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Ujjwal Sharma <usharma1998@gmail.com>
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Vadim Gorbachev <bmsdave@gmail.com>
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Victor Costan <costan@gmail.com>
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Vlad Burlik <vladbph@gmail.com>
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Vladimir Krivosheev <develar@gmail.com>
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Vladimir Shutoff <vovan@shutoff.ru>
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Wenlu Wang <kingwenlu@gmail.com>
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Wiktor Garbacz <wiktor.garbacz@gmail.com>
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Wouter Vermeiren <wouter.vermeiren@essensium.com>
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Xiaoyin Liu <xiaoyin.l@outlook.com>
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Yannic Bonenberger <contact@yannic-bonenberger.com>
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Yong Wang <ccyongwang@tencent.com>
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Youfeng Hao <ajihyf@gmail.com>
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Yu Yin <xwafish@gmail.com>
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Zac Hansen <xaxxon@gmail.com>
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Zhao Jiazhong <kyslie3100@gmail.com>
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Zhongping Wang <kewpie.w.zp@gmail.com>
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柳荣一 <admin@web-tinker.com>
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Yanbo Li <lybvinci@gmail.com>
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