Bad form to reply to my own messages! Anyway, it looks like I'm not the only one having this issue: http://www.spinics.net/lists/kvm/msg53924.html TJ, did you ever find out what the problem was? You had exactly the same problem I'm having. Regards, Gonzalo On Wed, Aug 10, 2011 at 10:23 PM, Gonzalo Servat <gonzalo.servat@xxxxxxxxxxxx> wrote: > Hi All, > > I have been running KVM on RHEL 5.x successfully, and I'm keen to > upgrade to RHEL6.1 so I'm currently giving it a try. The host appears > to work fine up until the point that I start a VM that was previously > running fine on 5.x. At this point, the system becomes extremely laggy > (noticeable delay between key presses and when they appear via SSH). > > I did notice that dstat starts reporting "missed X ticks" as the VM > starts up and the system becomes sluggish. > > I have been monitoring the system via dstat/top, and load average, > memory and CPU look fine. I did however notice the number of > interrupts and context switches is a lot higher in RHEL6.1 than it was > on RHEL5.x. > > I have not seen anything interesting in /var/log/messages. > > Any ideas? Happy to provide whatever info you like. > > Hardware: IBM x3850 X5 / 128G RAM > Kernel: 2.6.32-131.6.1.el6 > QEMU-KVM: 0.12.1.2-2.160.el6_1.6 > > Many thanks in advance. > > Gonzalo > -- Gonzalo Servat Systems Administrator, Sirca Ltd Level 9, 80 Clarence St, Sydney NSW 2000 PO Box H58 Australia Square NSW 1215 Tel: +61 2 9236 9161 Fax: +61 2 9231 5988 www.sirca.org.au -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
