linux-kernel - Re: [PATCH 3/3] perf test: Add coresight tests to guage quality of data generated

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Message-ID: <20220526160817.GE795802@leoy-ThinkPad-X240s>
Date:   Fri, 27 May 2022 00:08:17 +0800
From:   Leo Yan <leo.yan@...aro.org>
To:     Carsten Haitzler <carsten.haitzler@...s.arm.com>
Cc:     linux-kernel@...r.kernel.org, coresight@...ts.linaro.org,
        suzuki.poulose@....com, mathieu.poirier@...aro.org,
        mike.leach@...aro.org, linux-perf-users@...r.kernel.org,
        acme@...nel.org
Subject: Re: [PATCH 3/3] perf test: Add coresight tests to guage quality of
 data generated

On Thu, May 26, 2022 at 04:20:39PM +0800, Leo Yan wrote:

[...]

> Yes, my Juno board has 8GB but I also have DB410c with 1GB with quad
> coes [1].  I am still concern for 256MB buffer size, it's not friendly for
> embedded system, and even not good for server.  For example, if we run
> this testing on Arm server with 96 cores (like Hisilicon D06 board),
> then we need the buffer size is:
> 
>   256MiB * 96 = 16GiB

Correct for my bad math... here should be 256MiB * 96 = 24GiB.