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Tue, 5 May 2020 12:58:55 -0400 (EDT) From: Thomas Monjalon <thomas@monjalon.net> To: David Marchand <david.marchand@redhat.com>, Jerin Jacob <jerinjacobk@gmail.com> Cc: 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> Date: Tue, 05 May 2020 18:58:53 +0200 Message-ID: <2445287.7s5MMGUR32@thomas> In-Reply-To: <CALBAE1PJTfdHij_aNnOxiYgqVjBSgptdV2ebJJ86bu3gCsT9cQ@mail.gmail.com> References: <20200503203135.6493-1-david.marchand@redhat.com> <CAJFAV8yDoMTSR9wOv9tp3r8aDKvzKFMv1J_JV1ThU45TRaGpew@mail.gmail.com> <CALBAE1PJTfdHij_aNnOxiYgqVjBSgptdV2ebJJ86bu3gCsT9cQ@mail.gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" Subject: Re: [dpdk-dev] [PATCH 2/8] trace: simplify trace point registration X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions <dev.dpdk.org> List-Unsubscribe: <https://mails.dpdk.org/options/dev>, <mailto:dev-request@dpdk.org?subject=unsubscribe> List-Archive: <http://mails.dpdk.org/archives/dev/> List-Post: <mailto:dev@dpdk.org> List-Help: <mailto:dev-request@dpdk.org?subject=help> List-Subscribe: <https://mails.dpdk.org/listinfo/dev>, <mailto:dev-request@dpdk.org?subject=subscribe> Errors-To: dev-bounces@dpdk.org Sender: "dev" <dev-bounces@dpdk.org> 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.