linux-kernel - Re: [PATCH v1] perf evlist: Force adding default events only to core PMUs

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Date: Sat, 25 May 2024 14:14:26 -0700
From: Linus Torvalds <torvalds@...ux-foundation.org>
To: Ian Rogers <irogers@...gle.com>
Cc: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>, 
	Arnaldo Carvalho de Melo <acme@...nel.org>, Namhyung Kim <namhyung@...nel.org>, 
	Mark Rutland <mark.rutland@....com>, 
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>, Jiri Olsa <jolsa@...nel.org>, 
	Adrian Hunter <adrian.hunter@...el.com>, Kan Liang <kan.liang@...ux.intel.com>, 
	James Clark <james.clark@....com>, Dominique Martinet <asmadeus@...ewreck.org>, 
	linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1] perf evlist: Force adding default events only to core PMUs

On Sat, 25 May 2024 at 09:43, Linus Torvalds
<torvalds@...ux-foundation.org> wrote:
>
> This makes 'perf record' work for me again.

Oh, wait, no it doesn't.

It makes just the plain "perf record" without any arguments work,
which was what I was testing because I was lazy.

So now

    $ perf record sleep 1

works fine. But

    $ perf record -e cycles:pp sleep 1

is still completely broken (with or without ":p" and ":pp").

So no. That still needs to be fixed, or the whole "prefer sysfs/JSON
by default" needs to be reverted.

               Linus