[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Xen-devel] Time went backwards

On 10 Mar 2006, at 17:00, Rik van Riel wrote:

I am very frequently seeing these Time went backwards messages
on my test systems.  Running a 2 VCPU guest on a single CPU
computer seems to be effective at triggering this ;)

That's interesting, particularly if you can trigger on a single physical CPU. In that case cpu_delta should definitely *never* be negative. Maybe the steal_time logic, which does mess with per-cpu processed_system_time, is not quite right? :-)

When did you start seeing the messages?

 -- Keir

Xen-devel mailing list



Lists.xenproject.org is hosted with RackSpace, monitoring our
servers 24x7x365 and backed by RackSpace's Fanatical Support®.