public inbox for linux-kernel@vger.kernel.org
 help / color / mirror / Atom feed
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
Date: Mon, 10 Feb 2020 22:04:19 +0100	[thread overview]
Message-ID: <20200210210419.GD36715@krava> (raw)
In-Reply-To: <20200210170159.GV302770@tassilo.jf.intel.com>

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


  reply	other threads:[~2020-02-10 21:04 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-02-06  1:56 [PATCH] perf stat: Show percore counts in per CPU output Jin Yao
2020-02-10 13:28 ` Jiri Olsa
2020-02-10 13:46   ` Jin, Yao
2020-02-10 14:01     ` Jiri Olsa
2020-02-10 17:01       ` Andi Kleen
2020-02-10 21:04         ` Jiri Olsa [this message]
2020-02-11  1:48           ` Jin, Yao

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20200210210419.GD36715@krava \
    --to=jolsa@redhat.com \
    --cc=Linux-kernel@vger.kernel.org \
    --cc=acme@kernel.org \
    --cc=ak@linux.intel.com \
    --cc=alexander.shishkin@linux.intel.com \
    --cc=jolsa@kernel.org \
    --cc=kan.liang@intel.com \
    --cc=mingo@redhat.com \
    --cc=peterz@infradead.org \
    --cc=yao.jin@intel.com \
    --cc=yao.jin@linux.intel.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox