From: Joerg Roedel <joerg.roedel@amd.com>
To: Ingo Molnar <mingo@elte.hu>
Cc: David Ahern <dsahern@gmail.com>,
Arnaldo Carvalho de Melo <acme@ghostprotocols.net>,
LKML <linux-kernel@vger.kernel.org>,
Jason Wang <jasowang@redhat.com>
Subject: Re: perf: record segfaults for cycles event when collecting data on a VM
Date: Thu, 9 Feb 2012 16:28:44 +0100 [thread overview]
Message-ID: <20120209152844.GQ22598@amd.com> (raw)
In-Reply-To: <20120209143253.GP22598@amd.com>
On Thu, Feb 09, 2012 at 03:32:53PM +0100, Joerg Roedel wrote:
> Yeah, right. Guest samples may also show up intentionally when the event
> modifiers are used. So crashing on machine==NULL needs to be fixed.
Hmm, on the other hand, there is no way to specify guest symbol
information to the regular perf subcommands except for perf-kvm. Without
that information perf can not resolve any GUEST_KERNEL samples, so in
the end there is no point in setting perf_guest to true except for
perf-kvm, no?
Joerg
--
AMD Operating System Research Center
Advanced Micro Devices GmbH Einsteinring 24 85609 Dornach
General Managers: Alberto Bozzo
Registration: Dornach, Landkr. Muenchen; Registerger. Muenchen, HRB Nr. 43632
next prev parent reply other threads:[~2012-02-09 15:28 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-02-08 16:55 perf: record segfaults for cycles event when collecting data on a VM David Ahern
2012-02-08 17:44 ` Joerg Roedel
2012-02-08 17:53 ` David Ahern
2012-02-08 17:57 ` Joerg Roedel
2012-02-09 7:30 ` Ingo Molnar
2012-02-09 11:14 ` Joerg Roedel
2012-02-09 13:34 ` Ingo Molnar
2012-02-09 14:32 ` Joerg Roedel
2012-02-09 15:28 ` Joerg Roedel [this message]
2012-02-09 15:47 ` David Ahern
2012-02-09 14:43 ` David Ahern
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=20120209152844.GQ22598@amd.com \
--to=joerg.roedel@amd.com \
--cc=acme@ghostprotocols.net \
--cc=dsahern@gmail.com \
--cc=jasowang@redhat.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@elte.hu \
/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