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

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Message-ID: <dcaf4aa9-213e-47c5-16e2-e7f8af259ce9@huawei.com>
Date:   Tue, 17 Mar 2020 17:42:46 +0000
From:   John Garry <john.garry@...wei.com>
To:     Jiri Olsa <jolsa@...hat.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 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

Thanks,
John

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