linux-kernel - Re: [PATCH v2 2/7] perf jevents: Support test events folder

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Date:   Tue, 17 Mar 2020 17:41:15 -0300
From:   Arnaldo Carvalho de Melo <arnaldo.melo@...il.com>
To:     John Garry <john.garry@...wei.com>
Cc:     Jiri Olsa <jolsa@...hat.com>, peterz@...radead.org,
        mingo@...hat.com, mark.rutland@....com,
        alexander.shishkin@...ux.intel.com, namhyung@...nel.org,
        will@...nel.org, ak@...ux.intel.com, linuxarm@...wei.com,
        linux-kernel@...r.kernel.org, james.clark@....com,
        qiangqing.zhang@....com
Subject: Re: [PATCH v2 2/7] perf jevents: Support test events folder

Em Tue, Mar 17, 2020 at 05:42:46PM +0000, John Garry escreveu:
> On 17/03/2020 17:06, Jiri Olsa wrote:
> > On Tue, Mar 17, 2020 at 04:25:32PM +0000, John Garry wrote:
> > > On 17/03/2020 16:20, Jiri Olsa wrote:
> > > > On Tue, Mar 17, 2020 at 07:02:14PM +0800, John Garry wrote:
> > > > > With the goal of supporting pmu-events test case, introduce support for a
> > > > > test events folder.
> > > > > 
> > > > > These test events can be used for testing generation of pmu-event tables
> > > > > and alias creation for any arch.
> > > > > 
> > > > > When running the pmu-events test case, these test events will be used
> > > > > as the platform-agnostic events, so aliases can be created per-PMU and
> > > > > validated against known expected values.
> > > > > 
> > > > > To support the test events, add a "testcpu" entry in pmu_events_map[].
> > > > > The pmu-events test will be able to lookup the events map for "testcpu",
> > > > > to verify the generated tables against expected values.
> > > > > 
> > > > > The resultant generated pmu-events.c will now look like the following:
> > > > 
> > > > can't compile this one:
> > > > 
> > > >     HOSTCC   pmu-events/jevents.o
> > > > pmu-events/jevents.c: In function ‘main’:
> > > > pmu-events/jevents.c:1195:3: error: ‘ret’ undeclared (first use in this function)
> > > >    1195 |   ret = 1;
> > > >         |   ^~~
> > > > pmu-events/jevents.c:1195:3: note: each undeclared identifier is reported only once for each function it appears in
> > > > pmu-events/jevents.c:1196:3: error: label ‘out_free_mapfile’ used but not defined
> > > >    1196 |   goto out_free_mapfile;
> > > >         |   ^~~~
> > > > mv: cannot stat 'pmu-events/.jevents.o.tmp': No such file or directory
> > > > make[3]: *** [/home/jolsa/kernel/linux-perf/tools/build/Makefile.build:97: pmu-events/jevents.o] Error 1
> > > > make[2]: *** [Makefile.perf:619: pmu-events/jevents-in.o] Error 2
> > > > make[1]: *** [Makefile.perf:225: sub-make] Error 2
> > > > make: *** [Makefile:70: all] Error 2
> > > 
> > > Hi jirka,
> > > 
> > > What baseline are you using? I used v5.6-rc6. The patches are here:
> > 
> > I applied your patches on Arnaldo's perf/core
> 
> My recent fix on jevents.c does not seem to be on that branch, but it is on
> perf/urgent and also included in v5.6-rc6

I'll merge perf/urgent into perf/core soon,

- Arnaldo
 
> Thanks,
> John
> 
> > 
> > > 
> > > https://github.com/hisilicon/kernel-dev/commits/private-topic-perf-5.6-pmu-events-test-upstream-v2
> > 
> > ok, will check
> > 
> > jirka
> > 
> > .
> > 
> 

-- 

- Arnaldo