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1. (WO2009120427) POWER-AWARE THREAD SCHEDULING AND DYNAMIC USE OF PROCESSORS

Pub. No.:    WO/2009/120427    International Application No.:    PCT/US2009/034209
Publication Date: Fri Oct 02 01:59:59 CEST 2009 International Filing Date: Tue Feb 17 00:59:59 CET 2009
IPC: G06F 1/26
G06F 9/46
G06F 1/32
G06F 12/00
Applicants: MICROSOFT CORPORATION
Inventors: MARSHALL, Allen
DENG, Yimin
JUDGE, Nicholas S.
KISHAN, Arun U.
RITZ, Andrew J.
Title: POWER-AWARE THREAD SCHEDULING AND DYNAMIC USE OF PROCESSORS
Abstract:
Techniques and apparatuses for providing power-aware thread scheduling and dynamic use of processors are disclosed. In some aspects, a multi-core system is monitored to determine core activity. The core activity may be compared to a power policy that balances a power savings plan with a performance plan. One or more of the cores may be parked in response to the comparison to reduce power consumption by the multi-core system. In additional aspects, the power-aware scheduling may be performed during a predetermined interval to dynamically park or unpark cores. Further aspects include adjusting the power state of unparked cores in response to the comparison of the core activity and power policy.