linux-kernel - Re: [PATCH v3 2/7] perf metric: Event "Compat" value supports matching multiple identifiers

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Message-ID: <892f57c7-8ce2-634c-26f3-4d4ab8b2f2ce@oracle.com>
Date:   Mon, 12 Jun 2023 19:15:28 +0100
From:   John Garry <john.g.garry@...cle.com>
To:     Jing Zhang <renyu.zj@...ux.alibaba.com>,
        Ian Rogers <irogers@...gle.com>, Will Deacon <will@...nel.org>,
        Shuai Xue <xueshuai@...ux.alibaba.com>,
        Robin Murphy <robin.murphy@....com>
Cc:     James Clark <james.clark@....com>,
        Mike Leach <mike.leach@...aro.org>,
        Leo Yan <leo.yan@...aro.org>,
        Mark Rutland <mark.rutland@....com>,
        Ilkka Koskinen <ilkka@...amperecomputing.com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Adrian Hunter <adrian.hunter@...el.com>,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-perf-users@...r.kernel.org,
        Zhuo Song <zhuo.song@...ux.alibaba.com>
Subject: Re: [PATCH v3 2/7] perf metric: Event "Compat" value supports
 matching multiple identifiers

On 08/06/2023 10:44, Jing Zhang wrote:
>> Unit is the format of the event_source device name. We should match based on that as well as compat. I need to check the code again to understand how that is done... it has changed a good bit in 3 years.
>>
> This situation only happens on uncore metric. I happened to write wrong Unit, but the metric still matches.
> 

I'm just double checking this now. I think any possible fix should be 
easy enough for current code but may be tricky for backport with lots of 
metric code changes.

Thanks,
John