From: Jerin Jacob <jerinjacobk@gmail.com>
To: Bruce Richardson <bruce.richardson@intel.com>
Cc: "Jerin Jacob Kollanukkaran" <jerinj@marvell.com>,
"dev@dpdk.org" <dev@dpdk.org>,
"Thomas Monjalon" <thomas@monjalon.net>,
"David Marchand" <david.marchand@redhat.com>,
"Ferruh Yigit" <ferruh.yigit@intel.com>,
"Andrew Rybchenko" <arybchenko@solarflare.com>,
"Ajit Khaparde" <ajit.khaparde@broadcom.com>,
"Qi Zhang" <qi.z.zhang@intel.com>,
"Xiaolong Ye" <xiaolong.ye@intel.com>,
"Raslan Darawsheh" <rasland@mellanox.com>,
"Maxime Coquelin" <maxime.coquelin@redhat.com>,
"Tiwei Bie" <tiwei.bie@intel.com>,
"Akhil Goyal" <akhil.goyal@nxp.com>,
"Luca Boccassi" <bluca@debian.org>,
"Kevin Traynor" <ktraynor@redhat.com>,
"maintainers@dpdk.org" <maintainers@dpdk.org>,
"John McNamara" <john.mcnamara@intel.com>,
"Marko Kovacevic" <marko.kovacevic@intel.com>,
"Ray Kinsella" <mdr@ashroe.eu>,
"Aaron Conole" <aconole@redhat.com>,
"Michael Santana" <maicolgabriel@hotmail.com>,
"Harry van Haaren" <harry.van.haaren@intel.com>,
"Cristian Dumitrescu" <cristian.dumitrescu@intel.com>,
"Phil Yang" <phil.yang@arm.com>,
"Joyce Kong" <joyce.kong@arm.com>,
"Mattias Rönnblom" <mattias.ronnblom@ericsson.com>,
"Jan Viktorin" <viktorin@rehivetech.com>,
"Gavin Hu" <gavin.hu@arm.com>,
"David Christensen" <drc@linux.vnet.ibm.com>,
"Konstantin Ananyev" <konstantin.ananyev@intel.com>,
"Anatoly Burakov" <anatoly.burakov@intel.com>,
"Harini Ramakrishnan" <harini.ramakrishnan@microsoft.com>,
"Omar Cardona" <ocardona@microsoft.com>,
"Anand Rawat" <anand.rawat@intel.com>,
"Ranjit Menon" <ranjit.menon@intel.com>,
"Olivier Matz" <olivier.matz@6wind.com>,
"Gage Eads" <gage.eads@intel.com>,
"Adrien Mazarguil" <adrien.mazarguil@6wind.com>,
"Nicolas Chautru" <nicolas.chautru@intel.com>,
"Declan Doherty" <declan.doherty@intel.com>,
"Fiona Trahe" <fiona.trahe@intel.com>,
"Ashish Gupta" <ashishg@marvell.com>,
"Erik Gabriel Carrillo" <erik.g.carrillo@intel.com>,
"Abhinandan Gujjar" <abhinandan.gujjar@intel.com>,
"Shreyansh Jain" <shreyansh.jain@nxp.com>,
"Hemant Agrawal" <hemant.agrawal@nxp.com>,
"Artem V. Andreev" <artem.andreev@oktetlabs.ru>,
"Nithin Kumar Dabilpuram" <ndabilpuram@marvell.com>,
"Vamsi Krishna Attunuru" <vattunuru@marvell.com>,
"Rosen Xu" <rosen.xu@intel.com>,
"Sachin Saxena" <sachin.saxena@nxp.com>,
"Stephen Hemminger" <sthemmin@microsoft.com>,
"Chas Williams" <chas3@att.com>,
"John W. Linville" <linville@tuxdriver.com>,
"Prasun Kapoor" <pkapoor@marvell.com>,
"Marcin Wojtas" <mw@semihalf.com>,
"Michal Krawczyk" <mk@semihalf.com>,
"Guy Tzalik" <gtzalik@amazon.com>,
"Evgeny Schemeilin" <evgenys@amazon.com>,
"Igor Chauskin" <igorch@amazon.com>,
"Ravi Kumar" <ravi1.kumar@amd.com>,
"Igor Russkikh" <igor.russkikh@aquantia.com>,
"Pavel Belous" <pavel.belous@aquantia.com>,
"Shepard Siegel" <shepard.siegel@atomicrules.com>,
"Ed Czeck" <ed.czeck@atomicrules.com>,
"John Miller" <john.miller@atomicrules.com>,
"Somnath Kotur" <somnath.kotur@broadcom.com>,
"Maciej Czekaj" <mczekaj@marvell.com>,
"Shijith Thotton" <sthotton@marvell.com>,
"Srisivasubramanian Srinivasan" <srinivasan@marvell.com>,
"Rahul Lakkireddy" <rahul.lakkireddy@chelsio.com>,
"John Daley" <johndale@cisco.com>,
"Hyong Youb Kim" <hyonkim@cisco.com>,
"Wei Hu (Xavier" <xavier.huwei@huawei.com>,
"Min Hu (Connor" <humin29@huawei.com>,
"Yisen Zhuang" <yisen.zhuang@huawei.com>,
"Ziyang Xuan" <xuanziyang2@huawei.com>,
"Xiaoyun Wang" <cloud.wangxiaoyun@huawei.com>,
"Guoyang Zhou" <zhouguoyang@huawei.com>,
"Beilei Xing" <beilei.xing@intel.com>,
"Xiao Wang" <xiao.w.wang@intel.com>,
"Jingjing Wu" <jingjing.wu@intel.com>,
"Wenzhuo Lu" <wenzhuo.lu@intel.com>,
"Qiming Yang" <qiming.yang@intel.com>,
"Tomasz Duszynski" <tdu@semihalf.com>,
"Liron Himi" <lironh@marvell.com>, "Zyta Szpak" <zr@semihalf.com>,
"Kiran Kumar Kokkilagadda" <kirankumark@marvell.com>,
"Matan Azrad" <matan@mellanox.com>,
"Shahaf Shuler" <shahafs@mellanox.com>,
"Viacheslav Ovsiienko" <viacheslavo@mellanox.com>,
"K. Y. Srinivasan" <kys@microsoft.com>,
"Haiyang Zhang" <haiyangz@microsoft.com>,
"Jan Remes" <remes@netcope.com>,
"Heinrich Kuhn" <heinrich.kuhn@netronome.com>,
"Jan Gutter" <jan.gutter@netronome.com>,
"Gagandeep Singh" <g.singh@nxp.com>,
"Rasesh Mody" <rmody@marvell.com>,
"Shahed Shaikh" <shshaikh@marvell.com>,
"Yong Wang" <yongwang@vmware.com>,
"Zhihong Wang" <zhihong.wang@intel.com>,
"Steven Webster" <steven.webster@windriver.com>,
"Matt Peters" <matt.peters@windriver.com>,
"Keith Wiles" <keith.wiles@intel.com>,
"Tetsuya Mukawa" <mtetsuyah@gmail.com>,
"Gaetan Rivet" <gaetan.rivet@6wind.com>,
"Jasvinder Singh" <jasvinder.singh@intel.com>,
"Jakub Grajciar" <jgrajcia@cisco.com>,
"Ruifeng Wang" <ruifeng.wang@arm.com>,
"Anoob Joseph" <anoobj@marvell.com>,
"Fan Zhang" <roy.fan.zhang@intel.com>,
"Pablo de Lara" <pablo.de.lara.guarch@intel.com>,
"John Griffin" <john.griffin@intel.com>,
"Deepak Kumar Jain" <deepak.k.jain@intel.com>,
"Michael Shamis" <michaelsh@marvell.com>,
"Nagadheeraj Rottela" <rnagadheeraj@marvell.com>,
"Srikanth Jampala" <jsrikanth@marvell.com>,
"Ankur Dwivedi" <adwivedi@marvell.com>,
"Jay Zhou" <jianjay.zhou@huawei.com>,
"Lee Daly" <lee.daly@intel.com>,
"Sunila Sahu" <ssahu@marvell.com>,
"Nipun Gupta" <nipun.gupta@nxp.com>,
"Liang Ma" <liang.j.ma@intel.com>,
"Peter Mccarthy" <peter.mccarthy@intel.com>,
"Tianfei zhang" <tianfei.zhang@intel.com>,
"Satha Koteswara Rao Kottidi" <skoteshwar@marvell.com>,
"Xiaoyun Li" <xiaoyun.li@intel.com>,
"Bernard Iremonger" <bernard.iremonger@intel.com>,
"Vladimir Medvedkin" <vladimir.medvedkin@intel.com>,
"David Hunt" <david.hunt@intel.com>,
"Reshma Pattan" <reshma.pattan@intel.com>,
"Byron Marohn" <byron.marohn@intel.com>,
"Sameh Gobriel" <sameh.gobriel@intel.com>,
"Yipeng Wang" <yipeng1.wang@intel.com>,
"Honnappa Nagarahalli" <honnappa.nagarahalli@arm.com>,
"Robert Sanford" <rsanford@akamai.com>,
"Kevin Laatz" <kevin.laatz@intel.com>,
"Maryam Tahhan" <maryam.tahhan@intel.com>,
"Ori Kam" <orika@mellanox.com>,
"Radu Nicolau" <radu.nicolau@intel.com>,
"Tomasz Kantecki" <tomasz.kantecki@intel.com>,
"Sunil Kumar Kori" <skori@marvell.com>,
"Pavan Nikhilesh Bhagavatula" <pbhagavatula@marvell.com>,
"Kirill Rybalchenko" <kirill.rybalchenko@intel.com>,
"Kadam, Pallavi" <pallavi.kadam@intel.com>
Subject: Re: [dpdk-dev] [RFC] DPDK Trace support
Date: Mon, 13 Jan 2020 20:43:01 +0530 [thread overview]
Message-ID: <CALBAE1MaEp8uGSGx-UsP5WOcyConE2JpDznEtycA4ZsaHPtWzg@mail.gmail.com> (raw)
In-Reply-To: <20200113145823.GD1645@bricha3-MOBL.ger.corp.intel.com>
On Mon, Jan 13, 2020 at 8:28 PM Bruce Richardson
<bruce.richardson@intel.com> wrote:
>
> On Mon, Jan 13, 2020 at 08:16:07PM +0530, Jerin Jacob wrote:
> > On Mon, Jan 13, 2020 at 6:36 PM Bruce Richardson
> > <bruce.richardson@intel.com> wrote:
> > >
> > >
> > > > So, Probably it good to have native CTF emitter in DPDK and reuse all
> > > > open-source trace viewer(babeltrace and TraceCompass) and format(CTF) infrastructure.
> > > > I think, it would be best of both world.
> > > >
> > > > Any thoughts on this subject? Based on the community feedback, I can work on the patch for v20.05.
> > >
> > > Forgive my ignorance of LTTng, but is there the concept of
> > > enabling/disabling the trace points? If so, the overhead you refer to, that
> > > is presumably with the trace enabled?
> >
> > Yes this is when trace is enabled. If the trace is disabled then it
> > will be the only a handful of cycles.
> >
> Two follow-on questions:
> 1. Is the trace enable/disable dynamic at runtime?
Yes. See the requirement section.
> 2. Have you investigated how low the "handful of cycles" actually is?
Yes. it is around 1 to 3 cycles based on the arch. it boils down to
mostly a branch hit/miss on a memory location
embedded in a C macro.
> While I think it is important to get the cost of tracing right down to make
> it useful, the cost of tracing when it is not being used is even more
> critical IMHO.
Yes.
>
> /Bruce
next prev parent reply other threads:[~2020-01-13 15:13 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-13 10:40 Jerin Jacob Kollanukkaran
2020-01-13 11:00 ` Ray Kinsella
2020-01-13 12:04 ` [dpdk-dev] [EXT] " Jerin Jacob Kollanukkaran
2020-01-18 15:14 ` [dpdk-dev] " dave
2020-01-20 16:51 ` Stephen Hemminger
2020-01-13 13:05 ` Bruce Richardson
2020-01-13 14:46 ` Jerin Jacob
2020-01-13 14:58 ` Bruce Richardson
2020-01-13 15:13 ` Jerin Jacob [this message]
2020-01-13 16:12 ` Bruce Richardson
2020-01-17 4:41 ` Jerin Jacob
2020-01-17 8:04 ` David Marchand
2020-01-17 9:52 ` Jerin Jacob
2020-01-17 10:30 ` Mattias Rönnblom
2020-01-17 10:54 ` Jerin Jacob
2020-02-15 10:21 ` Jerin Jacob
2020-02-17 9:35 ` Mattias Rönnblom
2020-02-17 10:23 ` Jerin Jacob
2020-01-17 10:43 ` David Marchand
2020-01-17 11:08 ` Jerin Jacob
2020-01-27 16:12 ` Aaron Conole
2020-01-27 17:23 ` Jerin Jacob
2020-01-20 4:48 Jerin Jacob Kollanukkaran
2020-01-20 12:08 ` Ray Kinsella
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=CALBAE1MaEp8uGSGx-UsP5WOcyConE2JpDznEtycA4ZsaHPtWzg@mail.gmail.com \
--to=jerinjacobk@gmail.com \
--cc=abhinandan.gujjar@intel.com \
--cc=aconole@redhat.com \
--cc=adrien.mazarguil@6wind.com \
--cc=adwivedi@marvell.com \
--cc=ajit.khaparde@broadcom.com \
--cc=akhil.goyal@nxp.com \
--cc=anand.rawat@intel.com \
--cc=anatoly.burakov@intel.com \
--cc=anoobj@marvell.com \
--cc=artem.andreev@oktetlabs.ru \
--cc=arybchenko@solarflare.com \
--cc=ashishg@marvell.com \
--cc=beilei.xing@intel.com \
--cc=bernard.iremonger@intel.com \
--cc=bluca@debian.org \
--cc=bruce.richardson@intel.com \
--cc=byron.marohn@intel.com \
--cc=chas3@att.com \
--cc=cloud.wangxiaoyun@huawei.com \
--cc=cristian.dumitrescu@intel.com \
--cc=david.hunt@intel.com \
--cc=david.marchand@redhat.com \
--cc=declan.doherty@intel.com \
--cc=deepak.k.jain@intel.com \
--cc=dev@dpdk.org \
--cc=drc@linux.vnet.ibm.com \
--cc=ed.czeck@atomicrules.com \
--cc=erik.g.carrillo@intel.com \
--cc=evgenys@amazon.com \
--cc=ferruh.yigit@intel.com \
--cc=fiona.trahe@intel.com \
--cc=g.singh@nxp.com \
--cc=gaetan.rivet@6wind.com \
--cc=gage.eads@intel.com \
--cc=gavin.hu@arm.com \
--cc=gtzalik@amazon.com \
--cc=haiyangz@microsoft.com \
--cc=harini.ramakrishnan@microsoft.com \
--cc=harry.van.haaren@intel.com \
--cc=heinrich.kuhn@netronome.com \
--cc=hemant.agrawal@nxp.com \
--cc=honnappa.nagarahalli@arm.com \
--cc=humin29@huawei.com \
--cc=hyonkim@cisco.com \
--cc=igor.russkikh@aquantia.com \
--cc=igorch@amazon.com \
--cc=jan.gutter@netronome.com \
--cc=jasvinder.singh@intel.com \
--cc=jerinj@marvell.com \
--cc=jgrajcia@cisco.com \
--cc=jianjay.zhou@huawei.com \
--cc=jingjing.wu@intel.com \
--cc=john.griffin@intel.com \
--cc=john.mcnamara@intel.com \
--cc=john.miller@atomicrules.com \
--cc=johndale@cisco.com \
--cc=joyce.kong@arm.com \
--cc=jsrikanth@marvell.com \
--cc=keith.wiles@intel.com \
--cc=kevin.laatz@intel.com \
--cc=kirankumark@marvell.com \
--cc=kirill.rybalchenko@intel.com \
--cc=konstantin.ananyev@intel.com \
--cc=ktraynor@redhat.com \
--cc=kys@microsoft.com \
--cc=lee.daly@intel.com \
--cc=liang.j.ma@intel.com \
--cc=linville@tuxdriver.com \
--cc=lironh@marvell.com \
--cc=maicolgabriel@hotmail.com \
--cc=maintainers@dpdk.org \
--cc=marko.kovacevic@intel.com \
--cc=maryam.tahhan@intel.com \
--cc=matan@mellanox.com \
--cc=matt.peters@windriver.com \
--cc=mattias.ronnblom@ericsson.com \
--cc=maxime.coquelin@redhat.com \
--cc=mczekaj@marvell.com \
--cc=mdr@ashroe.eu \
--cc=michaelsh@marvell.com \
--cc=mk@semihalf.com \
--cc=mtetsuyah@gmail.com \
--cc=mw@semihalf.com \
--cc=ndabilpuram@marvell.com \
--cc=nicolas.chautru@intel.com \
--cc=nipun.gupta@nxp.com \
--cc=ocardona@microsoft.com \
--cc=olivier.matz@6wind.com \
--cc=orika@mellanox.com \
--cc=pablo.de.lara.guarch@intel.com \
--cc=pallavi.kadam@intel.com \
--cc=pavel.belous@aquantia.com \
--cc=pbhagavatula@marvell.com \
--cc=peter.mccarthy@intel.com \
--cc=phil.yang@arm.com \
--cc=pkapoor@marvell.com \
--cc=qi.z.zhang@intel.com \
--cc=qiming.yang@intel.com \
--cc=radu.nicolau@intel.com \
--cc=rahul.lakkireddy@chelsio.com \
--cc=ranjit.menon@intel.com \
--cc=rasland@mellanox.com \
--cc=ravi1.kumar@amd.com \
--cc=remes@netcope.com \
--cc=reshma.pattan@intel.com \
--cc=rmody@marvell.com \
--cc=rnagadheeraj@marvell.com \
--cc=rosen.xu@intel.com \
--cc=roy.fan.zhang@intel.com \
--cc=rsanford@akamai.com \
--cc=ruifeng.wang@arm.com \
--cc=sachin.saxena@nxp.com \
--cc=sameh.gobriel@intel.com \
--cc=shahafs@mellanox.com \
--cc=shepard.siegel@atomicrules.com \
--cc=shreyansh.jain@nxp.com \
--cc=shshaikh@marvell.com \
--cc=skori@marvell.com \
--cc=skoteshwar@marvell.com \
--cc=somnath.kotur@broadcom.com \
--cc=srinivasan@marvell.com \
--cc=ssahu@marvell.com \
--cc=steven.webster@windriver.com \
--cc=sthemmin@microsoft.com \
--cc=sthotton@marvell.com \
--cc=tdu@semihalf.com \
--cc=thomas@monjalon.net \
--cc=tianfei.zhang@intel.com \
--cc=tiwei.bie@intel.com \
--cc=tomasz.kantecki@intel.com \
--cc=vattunuru@marvell.com \
--cc=viacheslavo@mellanox.com \
--cc=viktorin@rehivetech.com \
--cc=vladimir.medvedkin@intel.com \
--cc=wenzhuo.lu@intel.com \
--cc=xavier.huwei@huawei.com \
--cc=xiao.w.wang@intel.com \
--cc=xiaolong.ye@intel.com \
--cc=xiaoyun.li@intel.com \
--cc=xuanziyang2@huawei.com \
--cc=yipeng1.wang@intel.com \
--cc=yisen.zhuang@huawei.com \
--cc=yongwang@vmware.com \
--cc=zhihong.wang@intel.com \
--cc=zhouguoyang@huawei.com \
--cc=zr@semihalf.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).