On 07/30/2011 01:03 PM, Dennis Jacobfeuerborn wrote: > On 07/30/2011 06:37 AM, Pasi Kärkkäinen wrote: >> On Fri, Jul 29, 2011 at 08:07:38PM +0200, Dennis Jacobfeuerborn wrote: >>> Hi, >>> I'm trying to use oprofile to debug a problem with idle virtual machines >>> eating 10% cpu but apparently the debuginfo packages for Centos 6 do not >>> exist and so I cannot get any useful information from the kernel. >>> Is there some way to at least get the kernel-debuginfo from somewhere? >>> >> >> If those VMs are el5 then try adding "divider=10" for their kernels. > > It's a Centos6 "minimal" guest on a Centos 6 "Desktop" host so technically > this shouldn't be needed but I tried it anyway without effect. I also > removed the NIC and tried playing with the APIC/ACPI settings but this > doesn't seem to matter either. I filed a bug here: > > http://bugs.centos.org/view.php?id=5028 > > According to toracat he sees this also on RHEL6 and SL6 which has me > worried because if this is really a Problem upstream that hasn't been > addressed yet then I'm not sure how I can justify using Centos 6 as a > virtualization platform. 10% of wasted resources per VM is simply not > acceptable when you run more than one guest on a system. Just a heads up: The problem is the tablet device. Once you remove that from the guest the CPU usage returns to normal. Regards, Dennis