On Thu, May 15, 2008 at 05:03:37PM +0200, Thomas Mueller wrote:
> hi daniel
>
>
> >>i'm playing on debian lenny with kvm-66/libvirt-0.4.2 .
> >>
> >>if i run top, i see libvirtd is top cpu consumer. if i connect with
> >>strace to libvirtd, i see a thousand times this message:
> >>
> >>poll([{fd=3, events=POLLIN}, {fd=6, events=POLLIN|POLLERR|POLLHUP},
> >>{fd=7, events=POLLIN|POLLERR|POLLHUP}, {fd=8, events=POLLIN}, {fd=13,
> >>events=POLLIN|POLLERR|POLLHUP, revents=POLLHUP}, {fd=15,
> >>events=POLLIN|POLLERR|POLLHUP, revents=POLLHUP}, {fd=17,
> >>events=POLLIN|POLLERR|POLLHUP}, {fd=19, events=POLLIN|POLLERR|POLLHUP}],
> >>8, -1) = 2
> >
> >So this is saying 2 of file descriptors have hit 'end of file' condition
> >and for some bizarre reason libvirt is not cleaning them up. What do you
> >do to cause trigger the high CPU usage ? Does it occurr the moment you
> >start libvirtd ? Or only when you start a VM ? Or only when you shutdown
> >a VM ? Or something else altogether...
> >
> >The output of 'lsof -p' on the libvirtd process might be helpful. You
> >might also try running with --verbose and LIBVIRT_DEBUG=1 envirnoment
> >variable set and capturing the output
>
> hmm.. ok, i can't reproduce it anymore. :/ but i found a second libvirtd
> process in defunct state. maybe this was the cause for this "bizzare
> reason libvirt not cleaning them up".
>
> after rebooting i tested again and libvirtd was not consuming all of the
> cpu...
Well if it hits you again let us know, because it sounds like there's a
wierd edge case bug hiding in there somewhere...
Dan.
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