Correction to question:- Can keeping device models and KVM pit synchronize with the host clock <<separately>> result in any issues with booting up OSes?
-Abhishek -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Saksena, Abhishek Sent: Wednesday, September 02, 2009 1:09 PM To: Avi Kivity Cc: '[email protected]' Subject: RE: KVM and Qemu Synchronization 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:[email protected]] Sent: Wednesday, September 02, 2009 12:16 PM To: Saksena, Abhishek Cc: '[email protected]' 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 [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
