All of lore.kernel.org
 help / color / mirror / Atom feed
From: John Garry <john.garry@huawei.com>
To: <alexandre.truong@arm.com>
Cc: <linux-perf-users@vger.kernel.org>,
	"jolsa@kernel.org >> Jiri Olsa" <jolsa@kernel.org>,
	<german.gomez@arm.com>, <james.clark@arm.com>,
	"Linux Kernel Mailing List" <linux-kernel@vger.kernel.org>,
	Arnaldo Carvalho de Melo <acme@kernel.org>
Subject: perf tool: About "perf arm64: Inject missing frames when using 'perf record --call-graph=fp'"
Date: Tue, 5 Apr 2022 15:04:51 +0100	[thread overview]
Message-ID: <5f1d8b3f-0afa-2724-4ff1-f061939c68c5@huawei.com> (raw)

Hi Alexandre,

I notice that with commit b9f6fbb3b2c2 ("perf arm64: Inject missing 
frames when using 'perf record --call-graph=fp'") that I get messages 
spewing the console when running perf record+report, as below:

john@ubuntu:~/linux$sudo tools/perf/perf record -ag fio null12.fio
john@ubuntu:~/linux$sudo tools/perf/perf report > report
unwind: can't read reg 29
unwind: can't read reg 29
unwind: can't read reg 29
unwind: can't read reg 29
...

Do you know the possible cause? I haven't checked...

Thanks,
john

             reply	other threads:[~2022-04-05 20:28 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-04-05 14:04 John Garry [this message]
2022-04-06  9:08 ` perf tool: About "perf arm64: Inject missing frames when using 'perf record --call-graph=fp'" James Clark
2022-04-06 11:28   ` John Garry
2022-04-06 15:00   ` James Clark

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=5f1d8b3f-0afa-2724-4ff1-f061939c68c5@huawei.com \
    --to=john.garry@huawei.com \
    --cc=acme@kernel.org \
    --cc=alexandre.truong@arm.com \
    --cc=german.gomez@arm.com \
    --cc=james.clark@arm.com \
    --cc=jolsa@kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-perf-users@vger.kernel.org \
    /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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.