linux-kernel - Re: [PATCH v2 4/4] perf python: Add counting.py as example for counting perf events

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Message-ID: <aCO2nJG8i3S6vUid@x1>
Date: Tue, 13 May 2025 18:16:12 -0300
From: Arnaldo Carvalho de Melo <acme@...nel.org>
To: Ian Rogers <irogers@...gle.com>
Cc: Gautam Menghani <gautam@...ux.ibm.com>, namhyung@...nel.org,
	peterz@...radead.org, mingo@...hat.com, mark.rutland@....com,
	alexander.shishkin@...ux.intel.com, jolsa@...nel.org,
	adrian.hunter@...el.com, kan.liang@...ux.intel.com,
	linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org,
	maddy@...ux.ibm.com
Subject: Re: [PATCH v2 4/4] perf python: Add counting.py as example for
 counting perf events

On Tue, May 13, 2025 at 01:59:28PM -0700, Ian Rogers wrote:
> On Tue, May 13, 2025 at 1:50 PM Arnaldo Carvalho de Melo
> <acme@...nel.org> wrote:
> [snip]
> > Right, I like the effort he is making into having perf more usable in
> > python, and I encourage him to think about the issues you raised so that
> > we can come to some good abstractions.
> 
> Thanks Arnaldo, can we be tolerant to API changes in the python from a
> "regression" point-of-view? Like avoiding the notion of indices?

But correct me if I am missing something, aren't indices only introduced
with this new patchset?

- Arnaldo

> Presumably such a fix would also need fixing in all the perf python
> scripts, but the external users I worry about. My sense is the number
> of external users is minimal, for example, toplev I don't believe is a
> user [1].
> 
> Ian
> 
> [1] https://github.com/andikleen/pmu-tools