Electrical computers and digital processing systems: virtual mac – Task management or control – Process scheduling
Reexamination Certificate
2006-08-01
2006-08-01
An, Meng-Al T. (Department: 2195)
Electrical computers and digital processing systems: virtual mac
Task management or control
Process scheduling
C702S099000, C702S130000, C702S132000, C702S188000, C714S039000, C361S103000, C710S260000
Reexamination Certificate
active
07086058
ABSTRACT:
Methods and apparatus are provided for eliminating hot spots on processor chips in a symmetric multiprocessor (SMP) computer system. Some operations, in particular, floating point multiply/add, repetitively utilize portions of a processor chip to the point that the average power of the affected portions exceeds cooling capabilities. The localized temperature of the affected portions can then exceed design limits. The current invention determines when a hot spot occurs and task swaps the task to another processor prior to the localized temperature becoming too hot. Moving of tasks to processors that have data affinity with the processor reporting a hot spot is considered. Further considerations include prioritizing unused processors and those processors that have not recently reported a hot spot.
REFERENCES:
patent: 4887181 (1989-12-01), Lenz
patent: 5502838 (1996-03-01), Kikinis
patent: 5557551 (1996-09-01), Craft
patent: 5752011 (1998-05-01), Thomas et al.
patent: 5826079 (1998-10-01), Boland et al.
patent: 5835885 (1998-11-01), Lin
patent: 5860137 (1999-01-01), Raz et al.
patent: 5974557 (1999-10-01), Thomas et al.
patent: 6047248 (2000-04-01), Georgiou et al.
patent: 6078944 (2000-06-01), Enko et al.
patent: 6160755 (2000-12-01), Norman et al.
patent: 6237058 (2001-05-01), Nakagawa
patent: 6298370 (2001-10-01), Tang et al.
patent: 6349385 (2002-02-01), Kaminski et al.
patent: 6442700 (2002-08-01), Cooper
patent: 6470289 (2002-10-01), Peters et al.
patent: 6631474 (2003-10-01), Cai et al.
patent: 6654894 (2003-11-01), Kaminski et al.
patent: 6681282 (2004-01-01), Golden et al.
patent: 6728959 (2004-04-01), Merkey
patent: 6789037 (2004-09-01), Gunther et al.
patent: 6804632 (2004-10-01), Orenstien et al.
patent: 6859882 (2005-02-01), Fung
patent: 6892312 (2005-05-01), Johnson
patent: 6934658 (2005-08-01), Clabes et al.
patent: 2002/0143488 (2002-10-01), Cooper
patent: 2003/0041289 (2003-02-01), Ku et al.
patent: 2003/0110012 (2003-06-01), Orenstien et al.
Cheng et al., “An Efficient Method for Hot-Spot Identification in ULSI Circuits”, IEEE, pp. 124-127.
An Meng-Al T.
To Jennifer N.
Williams Robert R.
LandOfFree
Method and apparatus to eliminate processor core hot spots does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus to eliminate processor core hot spots, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus to eliminate processor core hot spots will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3654171