linux-kernel - Re: [PATCH v5 2/3] perf vendor events amd: add Zen2 events

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Date:   Wed, 18 Mar 2020 12:52:45 -0300
From:   Arnaldo Carvalho de Melo <arnaldo.melo@...il.com>
To:     Vijay Thakkar <vijaythakkar@...com>
Cc:     Arnaldo Carvalho de Melo <arnaldo.melo@...il.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Kim Phillips <kim.phillips@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Martin Liška <mliska@...e.cz>,
        Jon Grimm <jon.grimm@....com>, linux-kernel@...r.kernel.org,
        linux-perf-users@...r.kernel.org
Subject: Re: [PATCH v5 2/3] perf vendor events amd: add Zen2 events

Em Wed, Mar 18, 2020 at 11:21:12AM -0400, Vijay Thakkar escreveu:
> >   floating point:
> >     fpu_pipe_assignment.total
> >          [Total number of fp uOps]
> >   
> >   
> >   Metric Groups:
> >  
> 
> I just realized that I did not add back the counters for per pipe total
> assignment as I said in the commit message. Patch 3/3 adds the total
> uOp assignments per pipe for Zen1 based processors. Although the PPR for
> Matisse does not list these counters, I can still sample them on my
> Ryzen 3900X system and they seem to report correct numbers. For example,
> here is the result of running:
> 
> $> perf stat -e r100,r200,r400,r800,rf00 ls
> 
> $> Performance counter stats for 'ls':
> 
>             5,047      r100:u
>             5,236      r200:u
>             31,300     r400:u
>             2,040      r800:u
>             43,623     fpu_pipe_assignment.total:u
> 
> Note that the per pipe total counters add up the overall total, which
> makes me think I should submit a v6 of this patch adding the per pipe
> totals for zen2 as well, especially since it is mentioned in the commit
> message.

Ok, so I'll remove these patches, please redo that sequence I did in the
commit log, ok?

- Arnaldo