linux-kernel - Re: [PATCH RFC 4/7] perf pmu: Rename uncore symbols to include system PMUs

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Date:   Mon, 10 Feb 2020 13:07:15 +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,
        linux-arm-kernel@...ts.infradead.org, suzuki.poulose@....com,
        james.clark@....com, zhangshaokun@...ilicon.com,
        robin.murphy@....com
Subject: Re: [PATCH RFC 4/7] perf pmu: Rename uncore symbols to include
 system PMUs

On Fri, Jan 24, 2020 at 10:35:02PM +0800, John Garry wrote:

SNIP

>  		/* Only split the uncore group which members use alias */
> -		if (!evsel->use_uncore_alias)
> +		if (!evsel->use_uncore_or_system_alias)
>  			goto out;
>  
>  		/* The events must be from the same uncore block */
> diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c
> index 8b99fd312aae..569aba4cec89 100644
> --- a/tools/perf/util/pmu.c
> +++ b/tools/perf/util/pmu.c
> @@ -623,7 +623,7 @@ static struct perf_cpu_map *pmu_cpumask(const char *name)
>  	return NULL;
>  }
>  
> -static bool pmu_is_uncore(const char *name)
> +static bool pmu_is_uncore_or_sys(const char *name)

so we detect uncore PMU by checking for cpumask file

I don't see the connection here with the sysid or '_sys' checking,
that's just telling which ID to use when looking for an alias, no?
shouldn't that be separated?

jirka