linux-kernel - Re: [PATCHv3 00/19] perf metric: Add support to reuse metric

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Date:   Tue, 28 Jul 2020 14:54:56 +0200
From:   Jiri Olsa <jolsa@...hat.com>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     kajoljain <kjain@...ux.ibm.com>, Jiri Olsa <jolsa@...nel.org>,
        lkml <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Michael Petlan <mpetlan@...hat.com>,
        Andi Kleen <ak@...ux.intel.com>,
        John Garry <john.garry@...wei.com>,
        "Paul A. Clarke" <pc@...ibm.com>,
        Stephane Eranian <eranian@...gle.com>,
        Ian Rogers <irogers@...gle.com>
Subject: Re: [PATCHv3 00/19] perf metric: Add support to reuse metric

On Tue, Jul 28, 2020 at 09:39:55AM -0300, Arnaldo Carvalho de Melo wrote:
> Em Mon, Jul 20, 2020 at 09:16:25PM +0200, Jiri Olsa escreveu:
> > On Mon, Jul 20, 2020 at 02:32:40PM +0530, kajoljain wrote:
> > > 
> > > 
> > > On 7/20/20 1:49 PM, Jiri Olsa wrote:
> > > > On Mon, Jul 20, 2020 at 01:39:24PM +0530, kajoljain wrote:
> > > > 
> > > > SNIP
> > > > 
> > > >> This is with your perf/metric branch:
> > > >> command# ./perf stat -M PowerBUS_Frequency -C 0 -I 1000
> > > >> assertion failed at util/metricgroup.c:709
> > > >> #           time             counts unit events
> > > >>      1.000054545          7,807,505      hv_24x7/pm_pb_cyc,chip=0/ #      2.0 GHz  PowerBUS_Frequency_0
> > > >>      1.000054545          7,807,485      hv_24x7/pm_pb_cyc,chip=1/                                   
> > > >>      2.000232761          7,807,500      hv_24x7/pm_pb_cyc,chip=0/ #      2.0 GHz  PowerBUS_Frequency_0
> > > >>      2.000232761          7,807,478      hv_24x7/pm_pb_cyc,chip=1/                                   
> > > >>      3.000363762          7,799,665      hv_24x7/pm_pb_cyc,chip=0/ #      1.9 GHz  PowerBUS_Frequency_0
> > > >>      3.000363762          7,807,502      hv_24x7/pm_pb_cyc,chip=1/                                   
> > > >> ^C     3.259418599          2,022,150      hv_24x7/pm_pb_cyc,chip=0/ #      0.5 GHz  PowerBUS_Frequency_0
> > > >>      3.259418599          2,022,164      hv_24x7/pm_pb_cyc,chip=1/                                   
> > > >>
> > > >>  Performance counter stats for 'CPU(s) 0':
> > > >>
> > > >>         25,436,820      hv_24x7/pm_pb_cyc,chip=0/ #      6.4 GHz  PowerBUS_Frequency_0
> > > >>         25,444,629      hv_24x7/pm_pb_cyc,chip=1/                                   
> > > >>
> > > >>        3.259505529 seconds time elapsed
> > > > 
> > > > I found the bug, we are not adding runtime metrics as standalone ones,
> > > > but as referenced metrics.. will fix and try to add test for that
> > > > 
> > > > as for testing.. do I need some special ppc server to have support for this? 
> > > 
> > > Hi jiri,
> > >     We need power9 lpar machine and need to make sure `CONFIG_HV_PERF_CTRS` is
> > > enabled.
> > 
> > could you please try with following patch on top?
> 
> So, can you point me to the cset that this should be merged into? Or can
> it come as a separate patch? I'll put what I have in the tmp.perf/core
> branch, and will do testing, please let me know if you want to fold it
> or as a followup patch.

sorry for delay.. I planned to squash the change in, but if you already
pushed something out, I'll rebase on top, I will post new version tomorrow

1st 7 patches are good to go in any case

thanks,
jirka