From: Andi Kleen <ak@linux.intel.com>
To: Jiri Olsa <jolsa@redhat.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 09:01:59 -0800 [thread overview]
Message-ID: <20200210170159.GV302770@tassilo.jf.intel.com> (raw)
In-Reply-To: <20200210140120.GD9922@krava>
> > 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.
-Andi
next prev parent reply other threads:[~2020-02-10 17:02 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 [this message]
2020-02-10 21:04 ` Jiri Olsa
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=20200210170159.GV302770@tassilo.jf.intel.com \
--to=ak@linux.intel.com \
--cc=Linux-kernel@vger.kernel.org \
--cc=acme@kernel.org \
--cc=alexander.shishkin@linux.intel.com \
--cc=jolsa@kernel.org \
--cc=jolsa@redhat.com \
--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