Re: [KVM Clock Synchronization 4/4] Add master clock for KVM clock

2011-01-04 Thread Marcelo Tosatti
On Tue, Dec 28, 2010 at 07:38:20PM -1000, Zachary Amsden wrote: On systems with synchronized TSCs, we still have VCPU individual KVM clocks, each with their own computed offset. As this all happens at different times, the computed KVM clock offset can vary, causing a globally visible

Re: [KVM Clock Synchronization 4/4] Add master clock for KVM clock

2011-01-04 Thread Zachary Amsden
On 01/04/2011 08:20 AM, Marcelo Tosatti wrote: On Tue, Dec 28, 2010 at 07:38:20PM -1000, Zachary Amsden wrote: On systems with synchronized TSCs, we still have VCPU individual KVM clocks, each with their own computed offset. As this all happens at different times, the computed KVM clock

[KVM Clock Synchronization 4/4] Add master clock for KVM clock

2010-12-28 Thread Zachary Amsden
On systems with synchronized TSCs, we still have VCPU individual KVM clocks, each with their own computed offset. As this all happens at different times, the computed KVM clock offset can vary, causing a globally visible backwards clock. Currently this is protected against by using an atomic