linux-kernel - Re: [PATCH v2] Add power/gpu

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Message-ID: <20200813175037.48a16064@oasis.local.home>
Date:   Thu, 13 Aug 2020 17:50:37 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Peiyong Lin <lpy@...gle.com>
Cc:     amit.kucheria@...aro.org, android-kernel@...gle.com,
        gregkh@...uxfoundation.org, linux-kernel@...r.kernel.org,
        mingo@...hat.com, paul.walmsley@...ive.com, pavel@....cz,
        prahladk@...gle.com, rafael.j.wysocki@...el.com,
        ulf.hansson@...aro.org, yamada.masahiro@...ionext.com
Subject: Re: [PATCH v2] Add power/gpu_frequency tracepoint.

On Thu, 13 Aug 2020 14:37:03 -0700
Peiyong Lin <lpy@...gle.com> wrote:

> Historically there is no common trace event for GPU frequency, in
> downstream Android each different hardware vendor implements their own
> way to expose GPU frequency, for example as a debugfs node.  This patch
> standardize it as a common trace event in upstream linux kernel to help
> the ecosystem have a common implementation across hardware vendors.
> Toolings in the Linux ecosystem will benefit from this especially in the
> downstream Android, where this information is critical to graphics
> developers.
> 
> Signed-off-by: Peiyong Lin <lpy@...gle.com>
> ---
> 
> Changelog since v1:
>  - Use %u in TP_printk
> 

For just the tracing side of this, but the use case is up for others to do:

Reviewed-by: Steven Rostedt (VMware) <rostedt@...dmis.org>

-- Steve