linux-kernel - Re: [PATCH v4 00/30] coresight: Support for ACPI bindings

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Message-ID: <20190524013842.GA5971@leoy-ThinkPad-X240s>
Date:   Fri, 24 May 2019 09:38:42 +0800
From:   Leo Yan <leo.yan@...aro.org>
To:     Suzuki K Poulose <suzuki.poulose@....com>
Cc:     linux-arm-kernel@...ts.infradead.org, coresight@...ts.linaro.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 00/30] coresight: Support for ACPI bindings

Hi Suzuki,

On Thu, May 23, 2019 at 04:31:54PM +0100, Suzuki K Poulose wrote:

[...]

> > When you send out the new patch for exposing device connection, please
> > loop me so that I can base on it for perf testing related works.
> 
> Sure, will do.

Thanks a lot!

> As such, the perf testing should not be affected by that
> series. It is just a helper to demonstrate the connections. But yes, it
> will definitely help you to choose an ETF for a cluster, if you had multiple
> ETFs on the system. Otherwise, you should be OK.

Yeah, the perf testing approach is heavily based on sysfs out/in nodes
to find the trace pathes.

> Please be aware that the power management support is missing on ACPI platform.
> So you must make sure, by other means, that the debug domain is powered up.

Thanks for reminding; for the first step, I will not add any power
management enabling steps in the testing script, we can add the
related operations if later we have clear idea for this.

Thanks,
Leo Yan