Re: [PATCH 2/9] perf/core: Add PERF_SAMPLE_CGROUP feature

All of lore.kernel.org
 help / color / mirror / Atom feed

From: Namhyung Kim <namhyung@kernel.org>
To: Tejun Heo <tj@kernel.org>
Cc: Ingo Molnar <mingo@kernel.org>,
	Peter Zijlstra <a.p.zijlstra@chello.nl>,
	Arnaldo Carvalho de Melo <acme@kernel.org>,
	LKML <linux-kernel@vger.kernel.org>, Jiri Olsa <jolsa@redhat.com>,
	Alexander Shishkin <alexander.shishkin@linux.intel.com>,
	Stephane Eranian <eranian@google.com>,
	Li Zefan <lizefan@huawei.com>,
	Johannes Weiner <hannes@cmpxchg.org>
Subject: Re: [PATCH 2/9] perf/core: Add PERF_SAMPLE_CGROUP feature
Date: Sun, 8 Sep 2019 22:28:32 +0900	[thread overview]
Message-ID: <20190908132830.GA222866@google.com> (raw)
In-Reply-To: <20190905165655.GK2263813@devbig004.ftw2.facebook.com>

Hi Tejun,

On Thu, Sep 05, 2019 at 09:56:55AM -0700, Tejun Heo wrote:
> Hello, Namhyung.
> 
> On Tue, Sep 03, 2019 at 10:13:08AM +0800, Namhyung Kim wrote:
> > So is my understanding below correct?
> > 
> >  * currently kernfs ino+gen is different than inode's ino+gen
> 
> They're the same.  It's just that cgroup has other less useful IDs
> too.

Ah, ok.

> 
> >  * but it'd be better to make them same
> >  * so move (generic?) inode's ino+gen logic to cgroup
> >  * and kernfs node use the same logic (and number)
> >  * so perf sampling code (NMI) just access kernfs node
> >  * and userspace can use file handle for comparison
> 
> The rest, yes, pretty much.

Thanks for the clarification.  I'll take a look at it.

Thanks
Namhyung

next prev parent reply	other threads:[~2019-09-08 13:28 UTC|newest]

Thread overview: 43+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-28  7:31 [PATCHSET 0/9] perf: Improve cgroup profiling (v1) Namhyung Kim
2019-08-28  7:31 ` [PATCH 1/9] perf/core: Add PERF_RECORD_CGROUP event Namhyung Kim
2019-08-28  9:44   ` Peter Zijlstra
2019-08-28  9:44   ` Peter Zijlstra
2019-08-28 13:13     ` Arnaldo Carvalho de Melo
2019-08-30  3:46     ` Namhyung Kim
2019-08-30  7:34       ` Peter Zijlstra
2019-08-30 22:49         ` Namhyung Kim
2019-08-30 23:52           ` Stephane Eranian
2019-08-28 14:48   ` Tejun Heo
2019-08-30  3:56     ` Namhyung Kim
2019-08-28  7:31 ` [PATCH 2/9] perf/core: Add PERF_SAMPLE_CGROUP feature Namhyung Kim
2019-08-28 14:49   ` Tejun Heo
2019-08-31  3:03     ` Namhyung Kim
2019-08-31  4:58       ` Tejun Heo
2019-09-03  2:13         ` Namhyung Kim
2019-09-05 16:56           ` Tejun Heo
2019-09-08 13:28             ` Namhyung Kim [this message]
2019-09-14 14:02         ` Song Liu
2019-09-16 15:23           ` Tejun Heo
2019-09-19  6:42             ` Song Liu
2019-09-20  8:47               ` Namhyung Kim
2019-09-20 16:13                 ` Song Liu
2019-09-20 21:04                 ` Tejun Heo
2019-10-02  6:28                   ` Namhyung Kim
2019-10-07 14:16                     ` Tejun Heo
2019-08-28  7:31 ` [PATCH 3/9] perf tools: Basic support for CGROUP event Namhyung Kim
2019-08-30 12:55   ` Arnaldo Carvalho de Melo
2019-08-30 22:51     ` Namhyung Kim
2019-08-28  7:31 ` [PATCH 4/9] perf tools: Maintain cgroup hierarchy Namhyung Kim
2019-08-28  7:31 ` [PATCH 5/9] perf report: Add 'cgroup' sort key Namhyung Kim
2019-08-28  7:31 ` [PATCH 6/9] perf record: Support synthesizing cgroup events Namhyung Kim
2019-08-28  7:31 ` [PATCH 7/9] perf record: Add --all-cgroups option Namhyung Kim
2019-08-28  7:31 ` [PATCH 8/9] perf top: " Namhyung Kim
2019-08-28  7:31 ` [PATCH 9/9] perf script: Add --show-cgroup-events option Namhyung Kim
  -- strict thread matches above, loose matches on Subject: below --
2019-12-20  4:32 [PATCHSET 0/9] perf: Improve cgroup profiling (v2) Namhyung Kim
2019-12-20  4:32 ` [PATCH 2/9] perf/core: Add PERF_SAMPLE_CGROUP feature Namhyung Kim
2019-12-20  9:36   ` Peter Zijlstra
2019-12-20 15:23   ` Tejun Heo
2019-12-20 16:48     ` Peter Zijlstra
2019-12-20 16:59       ` Tejun Heo
2019-12-23  6:07 [PATCHSET 0/9] perf: Improve cgroup profiling (v3) Namhyung Kim
2019-12-23  6:07 ` [PATCH 2/9] perf/core: Add PERF_SAMPLE_CGROUP feature Namhyung Kim
2020-01-07 13:34 [PATCHSET 0/9] perf: Improve cgroup profiling (v4) Namhyung Kim
2020-01-07 13:34 ` [PATCH 2/9] perf/core: Add PERF_SAMPLE_CGROUP feature Namhyung Kim
2020-03-25 12:45 [PATCHSET 0/9] perf: Improve cgroup profiling (v6) Namhyung Kim
2020-03-25 12:45 ` [PATCH 2/9] perf/core: Add PERF_SAMPLE_CGROUP feature Namhyung Kim

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=20190908132830.GA222866@google.com \
    --to=namhyung@kernel.org \
    --cc=a.p.zijlstra@chello.nl \
    --cc=acme@kernel.org \
    --cc=alexander.shishkin@linux.intel.com \
    --cc=eranian@google.com \
    --cc=hannes@cmpxchg.org \
    --cc=jolsa@redhat.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=lizefan@huawei.com \
    --cc=mingo@kernel.org \
    --cc=tj@kernel.org \
    /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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.