Error - rtc: lost some interrupts at 1024 Hz

J

jhamon

Member
Aug 18, 2008
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Hi,

I've downloaded the iso for proxmox 0.9 Beta 2 and created the host node and then update this to the latest version pve-manager/0.9/3084

I've created a few KVM containers either using a CDrom or by uploading an iso image.

I've noticed that I'm repeatively getting the following error in the console.

rtc: lost some interrupts at 1024 Hz

Are these error messages of any significance? How do I fix this?



Jonathan Hamon
 
My guess is that you run a kernel with internal frequency of 1024HZ.

When running virtualized, this results in lost interrupt, resulting in a inexact clock (did you noticed a clock drift?).

Its better to use a kernel with lower timer resulution (100HZ).

- Dietmar
 
Hi,

Thank you for the suggestion. These seem to work OK in OpenVZ as far as I can tell. I seem to get this with every KVM container I run (I've tried about 6 different ones)

I even tried creating a new proxmox VE within the created host and I get this same error in the guest console.

How can I change the kernel time resolution?


Jonathan Hamon
 
jhamon said:
Thank you for the suggestion. These seem to work OK in OpenVZ as far as I can tell. I seem to get this with every KVM container I run (I've tried about 6 different ones)
Click to expand...

sure, thats because openvz guests does not run a separate kernel at all.

jhamon said:
I even tried creating a new proxmox VE within the created host and I get this same error in the guest console.
Click to expand...

proxmox ve kernel uses a 250Hz timer - so do you really get the same error message?

- Dietmar
 
Last edited:
I've researched this a bit further and found the problems seems to exist in the web interface if I use the Open VNC console

If I log in directly to SSH then I don't see the error messages.



Jonathan Hamon
 
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