Re: [kvm] Re: tcpdump locks up kvm host for a while.

2011-10-10 Thread Avi Kivity
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

Re: [kvm] Re: tcpdump locks up kvm host for a while.

2011-10-05 Thread Robin Lee Powell
On Wed, Oct 05, 2011 at 11:36:53AM -0700, Robin Lee Powell wrote: > On Wed, Oct 05, 2011 at 08:21:53PM +0200, Avi Kivity wrote: > > On 10/04/2011 09:40 PM, Robin Lee Powell wrote: > > >> >When I run tcpdump on a *guest*, the entire guest completely > > >> >freezes up; no response even to hitting

Re: [kvm] Re: [kvm] Re: [kvm] Re: [kvm] Re: [kvm] Re: [kvm] Re: tcpdump locks up kvm host for a while.

2011-10-04 Thread Avi Kivity
On 10/03/2011 05:03 AM, Robin Lee Powell wrote: > > > Alternatively, detailed instructions to reproduce? > > > > Start a VM. Wait a few days. Run tcpdump. The system locks up > > for 30+ seconds. > > How do you detect the lockup? Are you at the console when this > happens and everyt

Re: [kvm] Re: [kvm] Re: [kvm] Re: [kvm] Re: [kvm] Re: [kvm] Re: tcpdump locks up kvm host for a while.

2011-10-02 Thread Nikola Ciprich
> When I run tcpdump on a *guest*, the entire guest completely freezes > up; no response even to hitting enter on the console. "virsh list" > also locks up whenever it tries to print state about that VM (but > the others work fine), as does any other operation that touches the > state of that VM.

Re: [kvm] Re: [kvm] Re: [kvm] Re: [kvm] Re: [kvm] Re: [kvm] Re: tcpdump locks up kvm host for a while.

2011-10-02 Thread Robin Lee Powell
On Sun, Oct 02, 2011 at 03:38:29PM -0400, Avi Kivity wrote: > > > > > > > Well, any messages? > > > > None I can find. I'll try again later today and double check. > > > Please do. Oct 2 19:53:01 vrici dbus: [system] Activating service name='net.reactivated.Fprint' (using servicehelper) Oc

Re: [kvm] Re: [kvm] Re: [kvm] Re: [kvm] Re: [kvm] Re: tcpdump locks up kvm host for a while.

2011-10-02 Thread Avi Kivity
> > > > Well, any messages? > > None I can find. I'll try again later today and double check. Please do. > > > Alternatively, detailed instructions to reproduce? > > Start a VM. Wait a few days. Run tcpdump. The system locks up for > 30+ seconds. How do you detect the lockup? Are you

Re: [kvm] Re: [kvm] Re: [kvm] Re: [kvm] Re: [kvm] Re: tcpdump locks up kvm host for a while.

2011-10-02 Thread Robin Lee Powell
On Sun, Oct 02, 2011 at 07:21:08PM +0200, Avi Kivity wrote: > On 10/02/2011 07:13 PM, Robin Lee Powell wrote: > >On Sun, Oct 02, 2011 at 07:12:42PM +0200, Avi Kivity wrote: > >> On 10/02/2011 07:07 PM, Robin Lee Powell wrote: > >> >On Sun, Oct 02, 2011 at 07:06:35PM +0200, Avi Kivity wrote: > >>

Re: [kvm] Re: [kvm] Re: [kvm] Re: [kvm] Re: tcpdump locks up kvm host for a while.

2011-10-02 Thread Avi Kivity
On 10/02/2011 07:13 PM, Robin Lee Powell wrote: On Sun, Oct 02, 2011 at 07:12:42PM +0200, Avi Kivity wrote: > On 10/02/2011 07:07 PM, Robin Lee Powell wrote: > >On Sun, Oct 02, 2011 at 07:06:35PM +0200, Avi Kivity wrote: > >> On 10/02/2011 02:45 AM, Robin Lee Powell wrote: > >> >I'm afrai

Re: [kvm] Re: [kvm] Re: [kvm] Re: [kvm] Re: tcpdump locks up kvm host for a while.

2011-10-02 Thread Robin Lee Powell
On Sun, Oct 02, 2011 at 07:12:42PM +0200, Avi Kivity wrote: > On 10/02/2011 07:07 PM, Robin Lee Powell wrote: > >On Sun, Oct 02, 2011 at 07:06:35PM +0200, Avi Kivity wrote: > >> On 10/02/2011 02:45 AM, Robin Lee Powell wrote: > >> >I'm afraid clocksource=hpet didn't help much; after about 24 hour

Re: [kvm] Re: [kvm] Re: [kvm] Re: tcpdump locks up kvm host for a while.

2011-10-02 Thread Avi Kivity
On 10/02/2011 07:07 PM, Robin Lee Powell wrote: On Sun, Oct 02, 2011 at 07:06:35PM +0200, Avi Kivity wrote: > On 10/02/2011 02:45 AM, Robin Lee Powell wrote: > >I'm afraid clocksource=hpet didn't help much; after about 24 hours > >up, tcpdump hung the machine for for about 10 seconds. That ma

Re: [kvm] Re: [kvm] Re: [kvm] Re: tcpdump locks up kvm host for a while.

2011-10-02 Thread Robin Lee Powell
On Sun, Oct 02, 2011 at 07:06:35PM +0200, Avi Kivity wrote: > On 10/02/2011 02:45 AM, Robin Lee Powell wrote: > >I'm afraid clocksource=hpet didn't help much; after about 24 hours > >up, tcpdump hung the machine for for about 10 seconds. That may or > >may not be better than usual; I haven't been

Re: [kvm] Re: [kvm] Re: tcpdump locks up kvm host for a while.

2011-10-02 Thread Avi Kivity
On 10/02/2011 02:45 AM, Robin Lee Powell wrote: I'm afraid clocksource=hpet didn't help much; after about 24 hours up, tcpdump hung the machine for for about 10 seconds. That may or may not be better than usual; I haven't been timing things precisely. My suspicion is that it's slightly better,

Re: [kvm] Re: [kvm] Re: tcpdump locks up kvm host for a while.

2011-10-01 Thread Robin Lee Powell
I'm afraid clocksource=hpet didn't help much; after about 24 hours up, tcpdump hung the machine for for about 10 seconds. That may or may not be better than usual; I haven't been timing things precisely. My suspicion is that it's slightly better, but it's still not great. Also: rlpowell@vrici>

Re: [kvm] Re: tcpdump locks up kvm host for a while.

2011-10-01 Thread Nikola Ciprich
well, give it a try ;) I still haven't fully resolved this, but I'm sure it has to do something with the timesource - with kvm-clock, it got much worse... n. > [1.911056] Override clocksource tsc is not HRT compatible. Cannot switch > while in HRT/NOHZ mode > > Will hpet do any better? > >

Re: [kvm] Re: tcpdump locks up kvm host for a while.

2011-09-30 Thread Robin Lee Powell
On Fri, Sep 30, 2011 at 09:03:21PM +0200, Nikola Ciprich wrote: > Hello Robin, > > actually I'm stil hitting problems with tcpdump in KVM virtuals.. > what is the content of > /sys/devices/system/clocksource/clocksource0/current_clocksource? > I guess it'll be kvm-clock, try using clocksource=tsc