> -----Original Message----- > From: Paolo Bonzini [mailto:pbonzini@xxxxxxxxxx] > Sent: Wednesday, March 14, 2012 4:54 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 09:52, 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. > > No, why you're keeping roughly the same logic as current QEMU, instead > of the more radical changes that were in v2. You are right. Actually, the v4 is ready and it uses the same logic with v2. Since I have other high priority task in hand, I don't test v4 too much. So i plan to delay it for a while and hope v3 can be accepted before v4 is ready. If you really doesn't like the v3, I will pay more effort in v4 and will send out it ASAP. :) 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
