linux-kernel - Re: BoF on LPC 2019 : Linux Perf advancements for compute intensive and server systems

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Date:   Tue, 27 Aug 2019 09:48:02 +0200
From:   Jiri Olsa <jolsa@...hat.com>
To:     Arnaldo Carvalho de Melo <arnaldo.melo@...il.com>
Cc:     Andi Kleen <ak@...ux.intel.com>,
        Alexey Budankov <alexey.budankov@...ux.intel.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Kan Liang <kan.liang@...ux.intel.com>,
        Stephane Eranian <eranian@...gle.com>,
        Ian Rogers <irogers@...gle.com>,
        Song Liu <songliubraving@...com>,
        "Jin, Yao" <yao.jin@...ux.intel.com>,
        Ingo Molnar <mingo@...hat.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Kees Cook <keescook@...omium.org>,
        Jonatan Corbet <corbet@....net>,
        "linux-perf-users@...r.kernel.org" <linux-perf-users@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Mark Rutland <mark.rutland@....com>
Subject: Re: BoF on LPC 2019 : Linux Perf advancements for compute intensive
 and server systems

On Mon, Aug 26, 2019 at 07:10:21PM -0300, Arnaldo Carvalho de Melo wrote:
> Em Mon, Aug 26, 2019 at 10:57:58AM -0700, Andi Kleen escreveu:
> > > 
> > > > 
> > > > All those are already merged, after long reviewing phases and lots of
> > > > testing, right?
> > > 
> > > Right. These changes now constitute parts of the Linux kernel source tree.
> > 
> > Might be better to focus on future areas that haven't been merged yet.
> 
> Agreed, we can have a initial, short report on what has been done to
> address these issues, and I think Alexey could take care of that, but
> then we should try and list here what else in addition to what Ian et
> all listed on their talk.
> 
> And perhaps even things that ammeliorate the problems they list there,
> i.e. Ian, Stephane, the things that Alexey listed were already
> tested/considered by you guys?

there's also ongoing work on adding threads to perf record:
  https://lore.kernel.org/lkml/20180913125450.21342-1-jolsa@kernel.org/#t

currently being stuck on me sending the perf_sesion changes

Alexey ran some initial benchmarks and it seems to perform nicely,
not sure we discussed the results on list thought

jirka