linux-kernel - Re: [PATCHv2 2/2] perf tools: Fix term parsing for raw syntax

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Message-ID: <003c9419-4396-6ad6-b934-ec04bf9f8a63@linux.intel.com>
Date:   Mon, 27 Jul 2020 08:26:27 +0800
From:   "Jin, Yao" <yao.jin@...ux.intel.com>
To:     Jiri Olsa <jolsa@...nel.org>,
        Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     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>,
        Ian Rogers <irogers@...gle.com>,
        Stephane Eranian <eranian@...gle.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Thomas Richter <tmricht@...ux.ibm.com>
Subject: Re: [PATCHv2 2/2] perf tools: Fix term parsing for raw syntax



On 7/27/2020 8:21 AM, Jin, Yao wrote:
> 
> 
> On 7/26/2020 3:52 PM, Jiri Olsa wrote:
>> Jin Yao reported issue with possible conflict between raw
>> events and term values in pmu event syntax.
>>
>> Currently following syntax is resolved as raw event with
>> 0xead value:
>>    uncore_imc_free_running/read/
>>
>> instead of using 'read' term from uncore_imc_free_running pmu,
>> because 'read' is correct raw event syntax with 0xead value.
>>
>> To solve this issue we do following:
>>    - check existing terms during rXXXX syntax processing
>>      and make them priority in case of conflict
>>    - allow pmu/r0x1234/ syntax to be able to specify conflicting
>>      raw event (implemented in previous patch)
>>
>> Also adding automated tests for this and perf_pmu__parse_cleanup
>> call to parse_events_terms, so the test gets properly cleaned up.
>>
>> Reported-by: Jin Yao<yao.jin@...ux.intel.com>
>> Signed-off-by: Jiri Olsa<jolsa@...nel.org>
>> ---
>> v2 changes:
>>   - added comment to perf_pmu__test_parse_init
> 
> Acked-by: Jin Yao <yao.jin@...ux.intel.com>
> 
> Thanks
> Jin Yao

Also added with:
Fixes: 3a6c51e4d66c ("perf parser: Add support to specify rXXX event with pmu")?

Thanks
Jin Yao