From: Eric B Munson <emunson@mgebm.net>
To: eranian@google.com
Cc: a.p.zijlstra@chello.nl, mingo@elte.hu, anton@samba.org,
linux-kernel@vger.kernel.org, paulus@samba.org, hbabu@us.ibm.com
Subject: Oprofile Regression Caused by commit e5d1367f17ba6a6fed5fd8b74e4d5720923e0c25 on PPC
Date: Fri, 7 Oct 2011 16:42:47 -0400 [thread overview]
Message-ID: <20111007204247.GA5444@mgebm.net> (raw)
[-- Attachment #1: Type: text/plain, Size: 500 bytes --]
This commit seems to have caused a regression with oprofile. It is fairly easy
to trigger, simply run oprofile monitoring an event that will fire (something
frequent like CPU cycles) causes oprofile to fail saying that the PMU is in use.
If I disable CONFIG_CGROUP_PERF, everything goes back to working. I suspect the
problem is that the PMU is being initialized without being reserved for perf. I
am not yet sure of the right fix yet so if you have any suggestions I would
appreciate them.
Eric
[-- Attachment #2: Digital signature --]
[-- Type: application/pgp-signature, Size: 490 bytes --]
next reply other threads:[~2011-10-07 20:42 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-10-07 20:42 Eric B Munson [this message]
2011-10-10 23:38 ` Oprofile Regression Caused by commit e5d1367f17ba6a6fed5fd8b74e4d5720923e0c25 on PPC Eric B Munson
2011-10-11 7:44 ` Peter Zijlstra
2011-10-11 7:47 ` Stephane Eranian
2011-10-11 13:34 ` Eric B Munson
2011-10-11 13:35 ` Stephane Eranian
2011-10-11 13:32 ` Eric B Munson
2011-10-12 16:51 ` Eric B Munson
2011-10-12 20:37 ` Stephane Eranian
2011-10-12 22:20 ` Eric B Munson
2011-10-18 13:53 ` Eric B Munson
2011-10-18 14:43 ` Peter Zijlstra
2011-10-18 14:50 ` Stephane Eranian
2011-10-18 15:20 ` Eric B Munson
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=20111007204247.GA5444@mgebm.net \
--to=emunson@mgebm.net \
--cc=a.p.zijlstra@chello.nl \
--cc=anton@samba.org \
--cc=eranian@google.com \
--cc=hbabu@us.ibm.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@elte.hu \
--cc=paulus@samba.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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox