linux-kernel - Re: [PATCH v1 1/2] perf header: Support HYBRID

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Message-ID: <YJGgYSXcJbZ2n3H3@kernel.org>
Date:   Tue, 4 May 2021 16:28:33 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Jiri Olsa <jolsa@...hat.com>
Cc:     Jin Yao <yao.jin@...ux.intel.com>, jolsa@...nel.org,
        peterz@...radead.org, mingo@...hat.com,
        alexander.shishkin@...ux.intel.com, Linux-kernel@...r.kernel.org,
        ak@...ux.intel.com, kan.liang@...el.com, yao.jin@...el.com
Subject: Re: [PATCH v1 1/2] perf header: Support HYBRID_TOPOLOGY feature

Em Tue, May 04, 2021 at 04:56:44PM +0200, Jiri Olsa escreveu:
> On Fri, Apr 30, 2021 at 03:46:01PM +0800, Jin Yao wrote:
> > It would be useful to let user know the hybrid topology.
> > Adding HYBRID_TOPOLOGY feature in header to indicate the
> > core cpus and the atom cpus.

> > With this patch,

> > For the perf.data generated on hybrid platform,
> > reports the hybrid cpu list.

> >   root@...pl-adl-s-2:~# perf report --header-only -I
> >   ...
> >   # cpu_core cpu list : 0-15
> >   # cpu_atom cpu list : 16-23

> hum, should we print 'hybrid:' or something to make
> sure its not confused with something else? like
 
>   # hybrid cpu_core cpu list : 0-15
>   # hybrid cpu_atom cpu list : 16-23

But this _core/_atom already got to be enough? I disagreed with that
naming, but neverthless having one or the other present in an output is
a clear mark of this hybrid topology.

I.e having that extra hybrid string that wouldn't add information to the
output.

IMHO.

- Arnaldo