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Date:   Mon, 10 Feb 2020 22:04:19 +0100
From:   Jiri Olsa <jolsa@redhat.com>
To:     Andi Kleen <ak@linux.intel.com>
Cc:     "Jin, Yao" <yao.jin@linux.intel.com>, acme@kernel.org,
        jolsa@kernel.org, peterz@infradead.org, mingo@redhat.com,
        alexander.shishkin@linux.intel.com, Linux-kernel@vger.kernel.org,
        kan.liang@intel.com, yao.jin@intel.com
Subject: Re: [PATCH] perf stat: Show percore counts in per CPU output
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On Mon, Feb 10, 2020 at 09:01:59AM -0800, Andi Kleen wrote:
> > > With --percore-show-thread, CPU0 and CPU4 have the same counts (CPU0 and
> > > CPU4 are siblings, e.g. 2,453,061 in my example). The value is sum of CPU0 +
> > > CPU4.
> > 
> > so it shows percore stats but displays all the cpus? what is this good for?
> 
> This is essentially a replacement for the any bit (which is gone in Icelake).
> Per core counts are useful for some formulas, e.g. CoreIPC
> 
> The original percore version was inconvenient to post process. This
> variant matches the output of the any bit.

I see, please put this to the changelog/doc

thanks,
jirka