Thanks for the reply. Can keeping device models and KVM pit synchronize with the host clock result in any issues with booting up OSes? -Abhishek -----Original Message----- From: Avi Kivity [mailto:avi@xxxxxxxxxx] Sent: Wednesday, September 02, 2009 12:16 PM To: Saksena, Abhishek Cc: 'kvm@xxxxxxxxxxxxxxx' Subject: Re: KVM and Qemu Synchronization On 09/02/2009 10:04 PM, Saksena, Abhishek wrote: > Hi All, > I am interested to know how the KVM Synchronize with Qemu. I know KVM maintain the time in PIT/RTC and Qemu it's own thread for IO devices callback (using alarm timers). How it is guaranteed that Qemu maintained view of time is not passing to slow or too fast w.r.t KVM VCPu. > > Time is not synchronized. The kvm pit attempts to synchronize with the host clock, and so do the device models, but nothing is guaranteed. > Also, what's the approach for time synchronization when using SMP? > What do you mean? -- I have a truly marvellous patch that fixes the bug which this signature is too narrow to contain. -- 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
