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From: Avi Kivity <avi@redhat.com>
To: Robin Lee Powell <rlpowell@digitalkingdom.org>
Cc: kvm@vger.kernel.org
Subject: Re: Re: tcpdump locks up  kvm host for  a while.
Date: Mon, 10 Oct 2011 15:08:46 +0200	[thread overview]
Message-ID: <4E92EE5E.5050707@redhat.com> (raw)
In-Reply-To: <20111005202918.GL3023@stodi.digitalkingdom.org>

On 10/05/2011 10:29 PM, Robin Lee Powell wrote:
> >
> >  #
> >  # (For a higher level overview, try: perf report --sort comm,dso)
> >  #
> >
> >  How helpful is that?  -_-
> >
> >  I'm guessing I need --guestkallsyms= ; since they're all the same
> >  kernel I thought it'd figure it out.  I'll redo.
>
> OK, here's a "better" version.
>
> # Events: 46K cycles
> #
> # Overhead   Command            Shared Object                   Symbol
> # ........  ........  .......................  .......................
> #
>      74.81%  qemu-kvm  [unknown]                [u] 0x7fbdffd4c18a

This is in userspace, so it seems the guest wasn't completely stuck.

Try 'top -b' inside the guest to record what happens, let's see what 
processes this is and go from there.

>      25.14%  qemu-kvm  [guest.kernel.kallsyms]  [g] 0xffffffff811112f0

This doesn't resolve, please make sure the kernel-debuginfo package is 
installed in the guest and use the guestmount option.  (or you can 
install it in the host, I think)


-- 
error compiling committee.c: too many arguments to function


      reply	other threads:[~2011-10-10 13:08 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-09-28  2:01 tcpdump locks up kvm host for a while Robin Lee Powell
2011-09-29 19:07 ` Robin Lee Powell
2011-09-30 19:03   ` Nikola Ciprich
2011-09-30 22:19     ` Robin Lee Powell
2011-10-01  7:36       ` Nikola Ciprich
2011-10-02  0:45         ` Re: [kvm] " Robin Lee Powell
2011-10-02 17:06           ` Avi Kivity
2011-10-02 17:07             ` Re: [kvm] " Robin Lee Powell
2011-10-02 17:12               ` Avi Kivity
2011-10-02 17:13                 ` Re: [kvm] " Robin Lee Powell
2011-10-02 17:21                   ` Avi Kivity
2011-10-02 17:37                     ` Re: [kvm] " Robin Lee Powell
2011-10-02 19:38                       ` Avi Kivity
2011-10-03  3:03                         ` Re: [kvm] " Robin Lee Powell
2011-10-03  5:41                           ` Nikola Ciprich
2011-10-04 18:15                           ` Avi Kivity
2011-10-04 19:40                             ` Robin Lee Powell
2011-10-05 18:21                               ` Avi Kivity
     [not found]                                 ` <20111005183653.GF3023@stodi.digitalkingdom.org>
2011-10-05 20:29                                   ` Robin Lee Powell
2011-10-10 13:08                                     ` Avi Kivity [this message]

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