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

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Date:   Tue, 17 Mar 2020 18:06:45 +0100
From:   Jiri Olsa <jolsa@...hat.com>
To:     John Garry <john.garry@...wei.com>
Cc:     peterz@...radead.org, mingo@...hat.com, acme@...nel.org,
        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

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

> 
> https://github.com/hisilicon/kernel-dev/commits/private-topic-perf-5.6-pmu-events-test-upstream-v2

ok, will check

jirka