Re: [PATCH v5 0/2] perf list: Remove duplicate PMUs

[Arnaldo Carvalho de Melo <acme@kernel.org>]

Em Fri, Aug 25, 2023 at 10:05:46AM -0400, Liang, Kan escreveu:
> On 2023-08-25 9:52 a.m., Ian Rogers wrote:
> > When there are multiple PMUs, differing by ordered suffixes, by
> > default only display one. This avoids repeated listing of events, in
> > particular when there are 10s of uncore PMUs. If "-v" is passed to
> > "perf list" then still list all PMUs.
> > 
> > Listing fewer PMU/event combinations helps speed the all PMU event
> > tests.
> > 
> > Before:
> > ```
> > $ perf list
> > ...
> >   uncore_imc_free_running_0/data_read/               [Kernel PMU event]
> >   uncore_imc_free_running_0/data_total/              [Kernel PMU event]
> >   uncore_imc_free_running_0/data_write/              [Kernel PMU event]
> >   uncore_imc_free_running_1/data_read/               [Kernel PMU event]
> >   uncore_imc_free_running_1/data_total/              [Kernel PMU event]
> >   uncore_imc_free_running_1/data_write/              [Kernel PMU event]
> > ```
> > 
> > After:
> > ```
> > $ perf list
> > ...
> >   uncore_imc_free_running/data_read/                 [Kernel PMU event]
> >   uncore_imc_free_running/data_total/                [Kernel PMU event]
> >   uncore_imc_free_running/data_write/                [Kernel PMU event]
> > ...
> > $ perf list -v
> > ...
> >   uncore_imc_free_running_0/data_read/               [Kernel PMU event]
> >   uncore_imc_free_running_0/data_total/              [Kernel PMU event]
> >   uncore_imc_free_running_0/data_write/              [Kernel PMU event]
> >   uncore_imc_free_running_1/data_read/               [Kernel PMU event]
> >   uncore_imc_free_running_1/data_total/              [Kernel PMU event]
> >   uncore_imc_free_running_1/data_write/              [Kernel PMU event]
> > ...
> > ```
> > 
> > The PMUs are sorted by name then suffix as a part of this change.
> > 
> > v5: Improved the 2nd patch's commit message and removed an unused
> >     variable as suggested by Kan Liang <kan.liang@linux.intel.com>.
> > v4: Rebase on top of lazy PMU changes. Ignore numeric ordering due to
> >     gaps, suggested by Kan Liang <kan.liang@linux.intel.com>. Fold
> >     patches 2 & 3 as suggested by John Garry <john.g.garry@oracle.com>
> >     (done by accident as part of rebasing).
> > v3: Add detail to patch 1 sorting commit message about the suffix and
> >     why sorting is necessary.
> > v2: List all PMUs when "-v" is passed as suggested by John Garry
> >     <john.g.garry@oracle.com>.
> > 
> > Ian Rogers (2):
> >   perf pmus: Sort pmus by name then suffix
> >   perf pmus: Skip duplicate PMUs and don't print list suffix by default
> 
> 
> Reviewed-by: Kan Liang <kan.liang@linux.intel.com>

Thanks, applied.

- Arnaldo