linux-kernel - Re: [PATCH 23/24] selftests/resctrl: Add L2 CAT test

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Message-ID: <62jl5abkirflkzq7mqo7wh3gqir2o6af4cch565xnojaszhur4@nvdx4gvmempi>
Date:   Fri, 27 Oct 2023 14:46:25 +0200
From:   Maciej Wieczór-Retman 
        <maciej.wieczor-retman@...el.com>
To:     Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
CC:     <linux-kselftest@...r.kernel.org>,
        Reinette Chatre <reinette.chatre@...el.com>,
        Shuah Khan <shuah@...nel.org>,
        Shaopeng Tan <tan.shaopeng@...fujitsu.com>,
        Fenghua Yu <fenghua.yu@...el.com>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 23/24] selftests/resctrl: Add L2 CAT test

On 2023-10-24 at 12:26:33 +0300, Ilpo Järvinen wrote:
>CAT selftests only cover L3 but some newer CPUs come also with L2 CAT
>support.

Is there some some defined line since what CPU model is L2 CAT supported?

In my opinion, from the perspective of someone digging up this commit a couple
years from now it could be handy to have something more specific instead of
"some newer CPUs".

>
>Add L2 CAT selftest. As measuring L2 misses is not easily available
>with perf, use L3 accesses as a proxy for L2 CAT working or not.
>
>Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>

-- 
Kind regards
Maciej Wieczór-Retman