linux-kernel - Re: [PATCH RFC 4/9] perf jevents: Add sys_events_find_events

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Date:   Wed, 19 Jul 2023 17:07:19 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Ian Rogers <irogers@...gle.com>
Cc:     John Garry <john.g.garry@...cle.com>, namhyung@...nel.org,
        jolsa@...nel.org, linux-arm-kernel@...ts.infradead.org,
        linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org,
        renyu.zj@...ux.alibaba.com, shangxiaojing@...wei.com,
        kjain@...ux.ibm.com, kan.liang@...ux.intel.com
Subject: Re: [PATCH RFC 4/9] perf jevents: Add sys_events_find_events_table()

Em Wed, Jul 19, 2023 at 08:25:31AM -0700, Ian Rogers escreveu:
> On Tue, Jul 18, 2023 at 2:32 AM John Garry <john.g.garry@...cle.com> wrote:
> >
> > On 17/07/2023 22:39, Ian Rogers wrote:
> > > On Mon, Jul 17, 2023 at 12:41 AM John Garry<john.g.garry@...cle.com>  wrote:
> > >> On 14/07/2023 16:55, Ian Rogers wrote:
> > >>> In this
> > >>> series my main concern was in the changes of the event lookup and
> > >>> having implied PMUs. You mentioned doing these changes so I was
> > >>> waiting for a v2.
> > >> OK, fine, I can look to do this now.
> >
> > I was thinking about this a little further. So you suggest that the
> > metric expression contains PMU name per term, like
> > "cpu_atom@...tructions@ / cpu_atom@...les@" - how would/could this work
> > for PMUs with more complex naming, like the form hisi_siclXXX_cpa_YYY?
> > Would we use the "Unit" expression for the metric name, like
> > "@hisi_sicl,cpa@...nt_foo"?
> 
> How does this work for events? The "@hisi_sicl,cpa@...nt_foo" looks
> strange, shouldn't it be "hisi_sicl,cpa@...nt_foo@" but then hisi_sicl
> looks like an event name.
> 
> >
> > >>
> > >> BTW, which git repo/branch do you guys use for dev? I thought that it
> > >> would be acme git, but Namhyung says "We moved to new repos from acme to
> > >> perf/perf-tools and perf/perf-tools-next" - where is repo "perf"?
> > > Current development is here now:
> > > https://urldefense.com/v3/__https://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools-next.git/log/?h=perf-tools-next__;!!ACWV5N9M2RV99hQ!OQDHOClSjd6nVZhmgzrK3RwzXuQpP54QhqyIKpITa_MFD4PLdS7yPYSnvInFja9nrFx9Sd-UnlsJ6XUqAh4$
> >
> > Can that be added to the MAINTAINERS file? I suppose it is ok under
> > "PERFORMANCE EVENTS SUBSYTEM", since the two would-be git repos listed
> > under that same entry would be pretty obvious in purpose.
> 
> Arnaldo could you take a look at doing this?

Sure, just added this:

[acme@...co perf-tools-next]$ git show
commit 0146244875046fad472a39ffd61ec4f91719b62a (HEAD -> perf-tools-next)
Author: Arnaldo Carvalho de Melo <acme@...hat.com>
Date:   Wed Jul 19 16:53:01 2023 -0300

    MAINTAINERS: Add git information for perf-tools and perf-tools-next trees/branches

    Now the perf tools development is done on these trees/branches:

      git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools.git perf-tools
      git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools-next.git perf-tools-next

    For a while I'll continue mirroring what is these to the same branches
    in my git tree.

    Suggested-by: John Garry <john.g.garry@...cle.com>
    Cc: Adrian Hunter <adrian.hunter@...el.com>
    Cc: Ian Rogers <irogers@...gle.com>
    Cc: Jiri Olsa <jolsa@...nel.org>
    Cc: Namhyung Kim <namhyung@...nel.org>
    Link: https://lore.kernel.org/lkml/CAP-5=fVGOP6-k=BTRd_bn=N0HVy+1ShpdW5rk5ND0ZGhm_fQkg@mail.gmail.com
    Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>

diff --git a/MAINTAINERS b/MAINTAINERS
index aee340630ecaea38..e351cfc7cd41c570 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -16629,6 +16629,8 @@ L:      linux-kernel@...r.kernel.org
 S:     Supported
 W:     https://perf.wiki.kernel.org/
 T:     git git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git perf/core
+T:     git git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools.git perf-tools
+T:     git git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools-next.git perf-tools-next
 F:     arch/*/events/*
 F:     arch/*/events/*/*
 F:     arch/*/include/asm/perf_event.h
[acme@...co perf-tools-next]$