linux-kernel - Re: [PATCH v4 0/6] Perf tool: Support TSC for Arm64

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Date:   Thu, 24 Sep 2020 07:48:28 +0800
From:   Leo Yan <leo.yan@...aro.org>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Will Deacon <will@...nel.org>, Ingo Molnar <mingo@...hat.com>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        John Garry <john.garry@...wei.com>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Kemeng Shi <shikemeng@...wei.com>,
        Ian Rogers <irogers@...gle.com>,
        Remi Bernon <rbernon@...eweavers.com>,
        Nick Gasson <nick.gasson@....com>,
        Stephane Eranian <eranian@...gle.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Steve MacLean <Steve.MacLean@...rosoft.com>,
        "Gustavo A. R. Silva" <gustavoars@...nel.org>,
        Zou Wei <zou_wei@...wei.com>, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v4 0/6] Perf tool: Support TSC for Arm64

Hi Arnaldo,

On Wed, Sep 23, 2020 at 12:55:57PM -0300, Arnaldo Carvalho de Melo wrote:
> Em Wed, Sep 23, 2020 at 12:27:53PM -0300, Arnaldo Carvalho de Melo escreveu:
> > Em Tue, Sep 22, 2020 at 01:49:06PM -0300, Arnaldo Carvalho de Melo escreveu:
> > > Em Tue, Sep 22, 2020 at 08:07:32PM +0800, Leo Yan escreveu:
> > > > Hi Arnaldo,
> > > > 
> > > > On Mon, Sep 14, 2020 at 07:53:05PM +0800, Leo Yan wrote:
> > > > > This patch set is to refactor TSC implementation and move TSC code from
> > > > > x86 folder to util/tsc.c, this allows all archs to reuse the code.  And
> > > > > alse move the TSC testing from x86 folder to tests so can work as a
> > > > > common testing.
> > > > > 
> > > > > So far, for x86 it needs to support cap_user_time_zero and for Arm64
> > > > > it needs to support cap_user_time_short.  For architecture specific
> > > > > code, every arch only needs to implement its own rdtsc() to read out
> > > > > timer's counter.
> > > > > 
> > > > > This patch set has been rebased on the perf/core branch with latest
> > > > > commit b1f815c479c1 ("perf vendor events power9: Add hv_24x7 core level
> > > > > metric events") and tested on Arm64 DB410c.
> > > > 
> > > > Could you pick up this patch set?  Thanks!
> > > 
> > > Yeah, I picked it up now, its a pity nobody provided Acks :-\
> > > 
> > > Or have a missed them somehow?
> > 
> > Also:
> 
> So, this is the first:
> 
> commit 0ab58c405dd7c143a1482cb9414eb0eb9b31d42a (HEAD)
> Author: Leo Yan <leo.yan@...aro.org>
> Date:   Mon Sep 14 19:53:10 2020 +0800
> 
>     perf tests tsc: Make tsc testing as a common testing
> 
> I'll remove it and the ones after that, so the main feature is kept.
> 
> I'll retest, and then push to perf/core you can then continue from
> there.

Will monitor perf/core branch and after you push onto it, I will fix
the issue ASAP.   Sorry for inconvenience.

Thanks,
Leo