linux-kernel - BISECTED: perf test 'Miscellaneous Intel PT' failing on Intel hybrid machines

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Date: Tue, 9 Apr 2024 12:32:03 -0300
From: Arnaldo Carvalho de Melo <acme@...nel.org>
To: Ian Rogers <irogers@...gle.com>,
	Adrian Hunter <adrian.hunter@...el.com>
Cc: Jiri Olsa <jolsa@...nel.org>, Namhyung Kim <namhyung@...nel.org>,
	linux-perf-users@...r.kernel.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: BISECTED: perf test 'Miscellaneous Intel PT' failing on Intel hybrid
 machines

root@x1:~# perf test "Miscellaneous Intel PT testing"
112: Miscellaneous Intel PT testing                                  : FAILED!
root@x1:~#

then I revert:

commit 642e1ac96aaa12aeb41402e68eac7faf5917a67a (HEAD -> perf-tools-next)
Author: Arnaldo Carvalho de Melo <acme@...hat.com>
Date:   Tue Apr 9 12:28:49 2024 -0300

    Revert "perf pmus: Check if we can encode the PMU number in perf_event_attr.type"
    
    This reverts commit 82fe2e45cdb00de4fa648050ae33bdadf9b3294a.
⬢[acme@...lbox perf-tools-next]$

It works now:

root@x1:~# perf -v
perf version 6.8.g642e1ac96aaa
root@x1:~# perf test "Miscellaneous Intel PT testing"
117: Miscellaneous Intel PT testing                                  : Ok
root@x1:~#

Investigating, if you come up with ideas, lemme know.

- Arnaldo