How do power-saving modes affect scheduling?
If the system suspends, and resumes, AP is unaware of the interruption. Upon resumptions, partitions will have the percentage consumptions they had at suspensions. If the system varies processor speed to conserve power, AP is unaware of the variation. AP will continue to guarantee all partitions their budget percentages, but will assume that each millisecond has the same throughput. This means that scheduling will be effectively inaccurate for the 100ms (or windowsize) after a cpu changes speed. Thereafter it will be accurate. On SMP systems, APS assumes all CPUs are in the same power saving mode.
