From: Joakim Tjernlund <joakim.tjernlund@transmode.se>
To: "christophe.leroy@c-s.fr" <christophe.leroy@c-s.fr>,
"linuxppc-dev@lists.ozlabs.org" <linuxppc-dev@lists.ozlabs.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: Strange reports of perf events on powerpc 83xx
Date: Wed, 2 Sep 2015 14:20:38 +0000 [thread overview]
Message-ID: <1441203638.3349.203.camel@transmode.se> (raw)
In-Reply-To: <55DF17A3.7070009@c-s.fr>
On Thu, 2015-08-27 at 15:58 +0200, leroy christophe wrote:
> Hi,
>=20
> Has anybody already used 'perf' tool on powerpc MPC83xx ?
>=20
> I have been succesfully using perf on MPC8xx, but on MPC83xx I get=20
> something strange.
>=20
> perf record/report reports addresses on user stack, as if it was mixing=20
> up D accesses and I accesses.
>=20
> Any idea of what the problem can be ?
We are also experiencing strange addresses on 83xx, did find the cause
of this problem?
We are using Linux 4.1.0
>=20
> # Samples: 8K of event 'cpu-clock'
> # Event count (approx.): 2196000000
> #
> # Overhead Command Shared Object Symbol
> # ........ ............ ..................=20
> ............................................
> #
> 2.62% perf_reseau4 libpthread-2.18.so [.] __libc_send
> 2.56% perf_reseau4 [kernel.kallsyms] [k] __ip_make_skb
> 1.62% perf_reseau4 [kernel.kallsyms] [k] __ip_append_data.isra.=
39
> 1.55% perf_reseau4 [kernel.kallsyms] [k] ip_finish_output
> 1.33% perf_reseau4 [unknown] [k] 0x7ffffd94
> 1.33% perf_reseau4 [unknown] [k] 0x7ffffd95
> 1.28% perf_reseau4 [unknown] [k] 0x7ffffd97
> 1.26% perf_reseau4 [unknown] [k] 0x7ffffda3
> 1.24% perf_reseau4 [unknown] [k] 0x7ffffd98
> 1.22% perf_reseau4 [unknown] [k] 0x7ffffd92
> 1.22% perf_reseau4 [unknown] [k] 0x7ffffd9b
> 1.22% perf_reseau4 [unknown] [k] 0x7ffffdaa
> 1.21% perf_reseau4 [unknown] [k] 0x7ffffd96
> 1.18% perf_reseau4 [unknown] [k] 0x7ffffda7
> 1.17% perf_reseau4 [unknown] [k] 0x7ffffd8d
> 1.17% perf_reseau4 [unknown] [k] 0x7ffffd99
> 1.13% perf_reseau4 [unknown] [k] 0x7ffffd90
> 1.13% perf_reseau4 [unknown] [k] 0x7ffffda2
> 1.12% perf_reseau4 [kernel.kallsyms] [k] __local_bh_enable_ip
> 1.12% perf_reseau4 [unknown] [k] 0x7ffffd9c
> 1.12% perf_reseau4 [unknown] [k] 0x7ffffd9e
> 1.10% perf_reseau4 [unknown] [k] 0x7ffffda0
> 1.08% perf_reseau4 [unknown] [k] 0x7ffffd9f
> 1.08% perf_reseau4 [unknown] [k] 0x7ffffda6
> 1.05% perf_reseau4 [unknown] [k] 0x7ffffda8
> 1.02% perf_reseau4 [unknown] [k] 0x7ffffd9a
> 1.01% perf_reseau4 [unknown] [k] 0x7ffffdb0
> 1.00% perf_reseau4 [unknown] [k] 0x7ffffd89
> 1.00% perf_reseau4 [unknown] [k] 0x7ffffd8b
> 1.00% perf_reseau4 [unknown] [k] 0x7ffffdac
next prev parent reply other threads:[~2015-09-02 14:20 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-08-27 13:58 Strange reports of perf events on powerpc 83xx leroy christophe
2015-09-02 14:20 ` Joakim Tjernlund [this message]
2015-09-02 18:48 ` christophe leroy
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=1441203638.3349.203.camel@transmode.se \
--to=joakim.tjernlund@transmode.se \
--cc=christophe.leroy@c-s.fr \
--cc=linux-kernel@vger.kernel.org \
--cc=linuxppc-dev@lists.ozlabs.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;
as well as URLs for NNTP newsgroup(s).