From: David Ahern <dsahern@gmail.com>
To: Joerg Roedel <joerg.roedel@amd.com>
Cc: Ingo Molnar <mingo@elte.hu>,
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, 09 Feb 2012 08:47:25 -0700 [thread overview]
Message-ID: <4F33EA8D.4050009@gmail.com> (raw)
In-Reply-To: <20120209152844.GQ22598@amd.com>
On 02/09/2012 08:28 AM, Joerg Roedel wrote:
> 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?
Exactly. That was my point in my last reply.
next prev parent reply other threads:[~2012-02-09 15:47 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
2012-02-09 15:47 ` David Ahern [this message]
2012-02-09 14:43 ` David Ahern
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