linux-kernel - Re: [PATCH V7 0/9] osnoise: Support multiple instances (for RTLA)

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Message-ID: <20211028224111.1d8c8bed@rorschach.local.home>
Date:   Thu, 28 Oct 2021 22:41:11 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Daniel Bristot de Oliveira <bristot@...nel.org>
Cc:     Ingo Molnar <mingo@...hat.com>, Tom Zanussi <zanussi@...nel.org>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Juri Lelli <juri.lelli@...hat.com>,
        Clark Williams <williams@...hat.com>,
        John Kacur <jkacur@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        linux-rt-users@...r.kernel.org, linux-trace-devel@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH V7 0/9] osnoise: Support multiple instances (for RTLA)

On Thu, 28 Oct 2021 23:29:28 +0200
Daniel Bristot de Oliveira <bristot@...nel.org> wrote:

> Currently, osnoise and timerlat run only on a single instance only. To lift
> this limitation, this series adds support for parallel instances of the
> same tracer. For example, making it possible to run one osnoise instance
> for the tracer output and another for a set of tracepoints.
> 
> This patchset is the kernel dependencies for RTLA. It was
> being sent along with RTLA [1], but we split the kernel and
> user-space patch sets.
> 
> Steve, feel free to drop the last two if they break anything.
> 
> [1] RTLA: An interface for osnoise/timerlat tracers:
>     https://lore.kernel.org/lkml/cover.1635284863.git.bristot@kernel.org/
> 

Much better.

The only thing I would recommend now, is to write selftests to test
both osnoise and timerlat tracers. Note, this should be a separate
patch set.

-- Steve