> -----Original Message----- > From: Paolo Bonzini [mailto:pbonzini@xxxxxxxxxx] > Sent: Wednesday, March 14, 2012 4:35 PM > To: Zhang, Yang Z > Cc: qemu-devel@xxxxxxxxxx; Jan Kiszka; kvm@xxxxxxxxxxxxxxx; > aliguori@xxxxxxxxxx; Marcelo Tosatti > Subject: Re: [PATCH v3 0/7] RTC: New logic to emulate RTC > > Il 14/03/2012 01:00, Zhang, Yang Z ha scritto: > > Is there any comments with the version 3? > > Can you explain why you dropped the logic to set the timer to the next > event? Do you mean why I change the rtc logic? The reason is that: When a guest is idle, the main activity inside qemu is the rtc update timer(2 per second). In our experience(running 64 rhel6u1 guests), it will decrease pkg C6 residency about 6%(6% means 2 watts in my box). And normally, the guest will not use the update-end interrupt and alarm. So there has no need to run a periodic timer when guest isn't using it. best regards yang -- 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
