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From: Jerin Jacob <jerinjacobk@gmail.com>
To: Thomas Monjalon <thomas@monjalon.net>
Cc: David Marchand <david.marchand@redhat.com>,
	dpdk-dev <dev@dpdk.org>,  Jerin Jacob <jerinj@marvell.com>,
	Sunil Kumar Kori <skori@marvell.com>,
	 John McNamara <john.mcnamara@intel.com>,
	Marko Kovacevic <marko.kovacevic@intel.com>,
	 Declan Doherty <declan.doherty@intel.com>,
	Ferruh Yigit <ferruh.yigit@intel.com>,
	 Andrew Rybchenko <arybchenko@solarflare.com>,
	Olivier Matz <olivier.matz@6wind.com>
Subject: Re: [dpdk-dev] [PATCH 2/8] trace: simplify trace point registration
Date: Tue, 5 May 2020 22:58:27 +0530
Message-ID: <CALBAE1Oy0SUnbZ4-LF6PmqWFBKs1h=9QpEyTfGRNxhfCJwqMag@mail.gmail.com> (raw)
In-Reply-To: <1870194.PIDvDuAF1L@thomas>

On Tue, May 5, 2020 at 10:50 PM Thomas Monjalon <thomas@monjalon.net> wrote:
>
> 05/05/2020 19:09, Jerin Jacob:
> > On Tue, May 5, 2020 at 10:38 PM Jerin Jacob <jerinjacobk@gmail.com> wrote:
> > > On Tue, May 5, 2020 at 10:28 PM Thomas Monjalon <thomas@monjalon.net> wrote:
> > > > 05/05/2020 18:46, Jerin Jacob:
> > > > > On Tue, May 5, 2020 at 9:58 PM David Marchand <david.marchand@redhat.com> wrote:
> > > > > > On Tue, May 5, 2020 at 5:25 PM Jerin Jacob <jerinjacobk@gmail.com> wrote:
> > > > > > > On Tue, May 5, 2020 at 5:56 PM Jerin Jacob <jerinjacobk@gmail.com> wrote:
> > > > > > > > On Tue, May 5, 2020 at 5:06 PM David Marchand <david.marchand@redhat.com> wrote:
> > > > > > > > > On Tue, May 5, 2020 at 12:13 PM Jerin Jacob <jerinjacobk@gmail.com> wrote:
> > > > > > > > > > > > Please share the data.
> > > > > > > > > > >
> > > > > > > > > > > Measured time between first rte_trace_point_register and last one with
> > > > > > > > > > > a simple patch:
> > > > > > > > > >
> > > > > > > > > > I will try to reproduce this, once we finalize on the above synergy
> > > > > > > > > > with rte_log.
> > > > > > > > >
> > > > > > > > > I took the time to provide measure but you won't take the time to look at this.
> > > > > > > >
> > > > > > > > I will spend time on this. I would like to test with a shared library
> > > > > > > > also and more tracepoints.
> > > > > > > > I was looking for an agreement on using the constructor for rte_log as
> > > > > > > > well(Just make sure the direction is correct).
> > > > > > > >
> > > > > > > > Next steps:
> > > > > > > > - I will analyze the come back on this overhead on this thread.
> > > > > > >
> > > > > > > I have added 500 constructors for testing the overhead with the shared
> > > > > > > build and static build.
> > > > > > > My results inline with your results aka negligible overhead.
> > > > > > >
> > > > > > > David,
> > > > > > > Do you have plan for similar RTE_LOG_REGISTER as mentioned earlier?
> > > > > > > I would like to have rte_log and rte_trace semantics similar to registration.
> > > > > > > If you are not planning to submit the rte_log patch then I can send
> > > > > > > one for RC2 cleanup.
> > > > > >
> > > > > > It won't be possible for me.
> > > > >
> > > > > I can do that if we agree on the specifics.
> > > > >
> > > > >
> > > > > >
> > > > > > Relying on the current rte_log_register is buggy with shared builds,
> > > > > > as drivers are calling rte_log_register, then impose a default level
> > > > > > without caring about what the user passed.
> > > > > > So if we introduce a RTE_LOG_REGISTER macro now at least this must be fixed too.
> > > > > >
> > > > > > What I wanted to do:
> > > > > > - merge rte_log_register_and_pick_level() (experimental) into
> > > > > > rte_log_register, doing this should be fine from my pov,
> > > > > > - reconsider the relevance of a fallback logtype when registration fails,
> > > > > > - shoot the default level per component thing: levels meaning is
> > > > > > fragmented across the drivers/libraries because of it, but this will
> > > > > > open a big box of stuff,
> > > > >
> > > > > This you are referring to internal implementation improvement. Right?
> > > > > I was referring to remove the current clutter[1]
> > > > > If we stick the following as the interface. Then you can do other
> > > > > improvements when you get time
> > > > > that won't change the consumer code or interference part.
> > > > >
> > > > > #define RTE_LOG_REGISTER(type, name, level)
> > > >
> > > > This discussion is interesting but out of scope for rte_trace.
> > > > I am also interested in rte_log registration cleanup,
> > > > but I know it is too much work for the last weeks of 20.05.
> > > >
> > > > As Olivier said about rte_trace,
> > > > "Since it's a new API, it makes sense to make
> > > > it as good as possible for the first version."
> > > >
> > > > So please let's conclude on this rte_trace patch for 20.05-rc2,
> > > > and commit to fix rte_log registration in the first days of 20.08.
> > >
> > > Why not hold the trace registration patch 2/8 and apply rest for RC2.
> > > Once we have synergy between the registration scheme between rte_log
> > > and rte_trace
> > > apply the patch for RC2.
> >
> > I meant, Once we have synergy between the registration scheme between
> > rte_log and rte_trace
> > apply the patch for _20.08_?
>
> Because of what I wrote above:
> As Olivier said about rte_trace,
> "Since it's a new API, it makes sense to make
> it as good as possible for the first version."
>
> The intent is to show an API as simple as possible
> in order to have a maximum of developers integrating it,
> and getting more interesting feedbacks.
>
> In other words, we want to make your work shine for prime time.

I like that, If it is not shining just because of 2/8 not applying now
then I fine with that.
Anyway, it is an experimental API, There is still room to change and
nothing is set and stone.
For me, the synergy between log/trace interface important as trace
needs to replace rte_log.




>
>

  reply	other threads:[~2020-05-05 17:28 UTC|newest]

Thread overview: 55+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-03 20:31 [dpdk-dev] [PATCH 0/8] Traces cleanup for rc2 David Marchand
2020-05-03 20:31 ` [dpdk-dev] [PATCH 1/8] cryptodev: fix trace points registration David Marchand
2020-05-04  7:41   ` [dpdk-dev] [EXT] " Sunil Kumar Kori
2020-05-03 20:31 ` [dpdk-dev] [PATCH 2/8] trace: simplify trace point registration David Marchand
2020-05-04  2:46   ` Jerin Jacob
2020-05-04 14:02     ` Thomas Monjalon
2020-05-04 14:04     ` David Marchand
2020-05-04 14:39       ` Jerin Jacob
2020-05-04 17:08         ` David Marchand
2020-05-04 17:19           ` Jerin Jacob
2020-05-04 17:40             ` David Marchand
2020-05-04 17:54               ` Jerin Jacob
2020-05-04 21:31                 ` Thomas Monjalon
2020-05-05  3:43                   ` Jerin Jacob
2020-05-05  7:01                     ` Thomas Monjalon
2020-05-05  7:17                       ` Jerin Jacob
2020-05-05  7:24                         ` Thomas Monjalon
2020-05-05  7:33                           ` Jerin Jacob
2020-05-05  8:23                             ` David Marchand
2020-05-05 10:12                               ` Jerin Jacob
2020-05-05 10:26                                 ` Thomas Monjalon
2020-05-05 10:46                                   ` Jerin Jacob
2020-05-05 11:48                                     ` Olivier Matz
2020-05-05 11:35                                 ` David Marchand
2020-05-05 12:26                                   ` Jerin Jacob
2020-05-05 15:25                                     ` Jerin Jacob
2020-05-05 16:28                                       ` David Marchand
2020-05-05 16:46                                         ` Jerin Jacob
2020-05-05 16:58                                           ` Thomas Monjalon
2020-05-05 17:08                                             ` Jerin Jacob
2020-05-05 17:09                                               ` Jerin Jacob
2020-05-05 17:20                                                 ` Thomas Monjalon
2020-05-05 17:28                                                   ` Jerin Jacob [this message]
2020-05-05 20:10                                                     ` Thomas Monjalon
2020-05-06  6:11                                                       ` Jerin Jacob
2020-07-04 14:31   ` Jerin Jacob
2020-07-04 15:14   ` [dpdk-dev] [PATCH v2] " David Marchand
2020-07-05 19:41     ` Thomas Monjalon
2020-05-03 20:31 ` [dpdk-dev] [PATCH 3/8] trace: simplify trace point headers David Marchand
2020-05-04  6:12   ` Jerin Jacob
2020-05-03 20:31 ` [dpdk-dev] [PATCH 4/8] trace: avoid confusion on optarg David Marchand
2020-05-04  7:55   ` [dpdk-dev] [EXT] " Sunil Kumar Kori
2020-05-04 14:09     ` David Marchand
2020-05-05  5:45       ` Sunil Kumar Kori
2020-05-05  5:47         ` Sunil Kumar Kori
2020-05-03 20:31 ` [dpdk-dev] [PATCH 5/8] trace: remove unneeded checks in internal API David Marchand
2020-05-04  8:16   ` [dpdk-dev] [EXT] " Sunil Kumar Kori
2020-05-03 20:31 ` [dpdk-dev] [PATCH 6/8] trace: remove limitation on patterns number David Marchand
2020-05-04  8:48   ` [dpdk-dev] [EXT] " Sunil Kumar Kori
2020-05-04 14:14     ` David Marchand
2020-05-05  5:54       ` Sunil Kumar Kori
2020-05-03 20:31 ` [dpdk-dev] [PATCH 7/8] trace: remove string duplication David Marchand
2020-05-04  9:01   ` [dpdk-dev] [EXT] " Sunil Kumar Kori
2020-05-03 20:31 ` [dpdk-dev] [PATCH 8/8] trace: fix build with gcc 10 David Marchand
2020-05-06 13:06 ` [dpdk-dev] [PATCH 0/8] Traces cleanup for rc2 David Marchand

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