From: Marc Zyngier <maz@kernel.org>
To: Hector Martin <marcan@marcan.st>,
Arnaldo Carvalho de Melo <acme@redhat.com>,
Ian Rogers <irogers@google.com>,
James Clark <james.clark@arm.com>
Cc: linux-perf-users@vger.kernel.org,
LKML <linux-kernel@vger.kernel.org>,
Asahi Linux <asahi@lists.linux.dev>,
Mark Rutland <mark.rutland@arm.com>
Subject: Re: [REGRESSION] Perf (userspace) broken on big.LITTLE systems since v6.5
Date: Tue, 21 Nov 2023 13:40:31 +0000 [thread overview]
Message-ID: <86pm03z0kw.wl-maz@kernel.org> (raw)
In-Reply-To: <08f1f185-e259-4014-9ca4-6411d5c1bc65@marcan.st>
[Adding key people on Cc]
On Tue, 21 Nov 2023 12:08:48 +0000,
Hector Martin <marcan@marcan.st> wrote:
>
> Perf broke on all Apple ARM64 systems (tested almost everything), and
> according to maz also on Juno (so, probably all big.LITTLE) since v6.5.
I can confirm that at least on 6.7-rc2, perf is pretty busted on any
asymmetric ARM platform. It isn't clear what criteria is used to pick
the PMU, but nothing works anymore.
The saving grace in my case is that Debian still ships a 6.1 perftool
package, but that's obviously not going to last.
I'm happy to test potential fixes.
M.
--
Without deviation from the norm, progress is not possible.
next prev parent reply other threads:[~2023-11-21 13:40 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-11-21 12:08 [REGRESSION] Perf (userspace) broken on big.LITTLE systems since v6.5 Hector Martin
2023-11-21 13:40 ` Marc Zyngier [this message]
2023-11-21 15:24 ` Marc Zyngier
2023-11-21 15:40 ` Mark Rutland
2023-11-21 15:46 ` Ian Rogers
2023-11-21 16:02 ` Mark Rutland
2023-11-21 16:09 ` Ian Rogers
2023-11-21 16:15 ` Mark Rutland
2023-11-21 16:38 ` Ian Rogers
2023-11-22 3:23 ` Hector Martin
2023-11-22 13:06 ` Arnaldo Carvalho de Melo
2023-11-22 15:33 ` Ian Rogers
2023-11-22 15:49 ` Mark Rutland
2023-11-22 16:04 ` Ian Rogers
2023-11-22 16:26 ` Arnaldo Carvalho de Melo
2023-11-22 16:33 ` Ian Rogers
2023-11-22 16:19 ` Arnaldo Carvalho de Melo
2023-11-22 13:03 ` Mark Rutland
2023-11-22 15:29 ` Ian Rogers
2023-11-22 16:08 ` Mark Rutland
2023-11-22 16:29 ` Ian Rogers
2023-11-22 16:55 ` Arnaldo Carvalho de Melo
2023-11-22 16:59 ` Ian Rogers
2023-11-23 4:33 ` Ian Rogers
2023-11-21 15:41 ` Ian Rogers
2023-11-21 15:56 ` Mark Rutland
2023-11-21 16:03 ` Ian Rogers
2023-11-21 16:08 ` Mark Rutland
2023-11-23 14:23 ` Mark Rutland
2023-11-23 14:45 ` Marc Zyngier
2023-11-23 15:14 ` Ian Rogers
2023-11-23 16:48 ` Mark Rutland
2023-11-23 17:08 ` James Clark
2023-11-23 17:15 ` Mark Rutland
2023-11-21 23:43 ` Bagas Sanjaya
2023-12-06 12:09 ` Linux regression tracking #update (Thorsten Leemhuis)
2024-08-01 19:05 ` Ian Rogers
2024-08-07 8:54 ` Thorsten Leemhuis
2024-08-14 16:28 ` James Clark
2024-08-14 16:41 ` Arnaldo Carvalho de Melo
2024-08-15 15:15 ` James Clark
2024-08-15 15:20 ` James Clark
2024-08-15 15:27 ` Arnaldo Carvalho de Melo
2024-08-15 15:53 ` Arnaldo Carvalho de Melo
2024-08-16 8:57 ` James Clark
2024-08-15 17:29 ` Ian Rogers
2024-08-16 9:22 ` James Clark
2024-08-16 15:30 ` Ian Rogers
2024-08-17 1:38 ` Atish Kumar Patra
2024-08-20 8:58 ` James Clark
2024-08-19 14:56 ` James Clark
2024-08-19 15:44 ` Ian Rogers
2025-03-09 21:19 ` Ian Rogers
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=86pm03z0kw.wl-maz@kernel.org \
--to=maz@kernel.org \
--cc=acme@redhat.com \
--cc=asahi@lists.linux.dev \
--cc=irogers@google.com \
--cc=james.clark@arm.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-perf-users@vger.kernel.org \
--cc=marcan@marcan.st \
--cc=mark.rutland@arm.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox