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greybus
2009 Feb 09
4
Align periodic vpts to reduce timer interrupts and save power
Hi,
After c/s 18694 changed vHPET to vpt, for single HVM RHEL 5u1 guest idle case, our box will consume ~0.8W more power than before. The reason is two periodical vpts'' expires are hard to be aligned in the 50us soft timer SLOP. So we are considering a vpt specific enhancement which could try to just align periodical timers within vpt.
A generic enhancement is to add a new interface