linux-kernel - Re: [PATCH v4 12/12] perf test: improve pmu event metric testing

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Message-ID: <20200503221650.GA1916255@krava>
Date:   Mon, 4 May 2020 00:16:50 +0200
From:   Jiri Olsa <jolsa@...hat.com>
To:     Ian Rogers <irogers@...gle.com>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Kan Liang <kan.liang@...ux.intel.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Haiyan Song <haiyanx.song@...el.com>,
        Jin Yao <yao.jin@...ux.intel.com>,
        Song Liu <songliubraving@...com>,
        Ravi Bangoria <ravi.bangoria@...ux.ibm.com>,
        John Garry <john.garry@...wei.com>,
        Leo Yan <leo.yan@...aro.org>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Paul Clarke <pc@...ibm.com>,
        LKML <linux-kernel@...r.kernel.org>,
        kajoljain <kjain@...ux.ibm.com>,
        linux-perf-users <linux-perf-users@...r.kernel.org>,
        Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH v4 12/12] perf test: improve pmu event metric testing

On Sun, May 03, 2020 at 10:31:37AM -0700, Ian Rogers wrote:

SNIP

> > >
> > > This looks like a bug in skl-metrics.json:
> > >
> > >    {
> > >         "BriefDescription": "Average number of parallel data read
> > > requests to external memory. Accounts for demand loads and L1/L2
> > > prefetches",
> > >         "MetricExpr": "arb@...nt\\=0x80\\,umask\\=0x2@ /
> > > arb@...nt\\=0x80\\,umask\\=0x2\\,thresh\\=1@",
> > >         "MetricGroup": "Memory_BW",
> > >         "MetricName": "DRAM_Parallel_Reads"
> > >     },
> > >
> > > which can be fixed by removing "\\,thresh\\=1" but looking at the
> > > expression this will just make the expression yield a value of 1. As
> > > this is an Intel json file could they comment? Jiri, could you be
> > > missing a patch on the kernel side? We could lower this failure to
> > > just a diagnostic message to land this set of patches, let me know
> > > what you'd like me to do.
> >
> > I applied this on current Arnaldo's perf/core.. not sure there's
> > more pending changes out there
> >
> > I'd like not to delay this patchset too long.. could we push the
> > first 10 patches and solve the rest in separate change?
> 
> Thanks, I've attached a patch that can be squashed into 12 to make the
> error non-fatal. Patch 11 is trying to make the diagnostics around
> adding a PMU event clearer and aside warning messages, and removal of,
> has no functional effect. I don't mind the first 10 being merged and
> these coming later. I don't mind just patch 11 coming later as it'd be
> nice to have the test so metrics can get fixed.

sounds good, for patches 1 - 10:

Acked-by: Jiri Olsa <jolsa@...hat.com>

thanks,
jirka