Electrical computers and digital data processing systems: input/ – Input/output data processing – Input/output data buffering
Reexamination Certificate
2009-01-27
2009-10-13
Chan, Eddie P (Department: 2183)
Electrical computers and digital data processing systems: input/
Input/output data processing
Input/output data buffering
C714S724000
Reexamination Certificate
active
07603497
ABSTRACT:
A method of checkpointing a microprocessor by providing, in parallel, a current read value from a queue and a next read value from the queue, and then selectively passing one of the current read value and next read value to a capture latch based on an instruction completion signal. The capture latch can directly drive the checkpoint register circuitry in the recovery unit of the microprocessor. If the queue is empty, a pair of multiplexers connected to the input of the register queue array are used to pass the input data value. The instruction completion signal may indicate whether all instructions in an instruction group have successfully completed.
REFERENCES:
patent: 4823259 (1989-04-01), Aichelmann, Jr. et al.
patent: 5432918 (1995-07-01), Stamm
patent: 6088740 (2000-07-01), Ghaffari et al.
patent: 6600673 (2003-07-01), Croce
patent: 6662261 (2003-12-01), Duboc et al.
patent: 6791855 (2004-09-01), Batson et al.
patent: 6886048 (2005-04-01), Richard et al.
patent: 7409589 (2008-08-01), Mack et al.
patent: 2004/0243743 (2004-12-01), Smith
patent: 2006/0179207 (2006-08-01), Eisen et al.
patent: 2006/0179346 (2006-08-01), Bishop et al.
patent: 2007/0028078 (2007-02-01), Harris et al.
Tamir et al., “High-Performance Multi-Queue Buffers For Vlsi Communications Switches,” IEEE (1988).
Chappell et al., “Microarchitectural Support For Precomputation Microthreads,” IEEE (2002).
Buyuktosunoglu et al., “Tradeoffs In Power-Efficient Issue Queue Design,” ISLPED (Aug. 2002).
Kucuk et al., “Reducing Reorder Buffer Complexity Through Selective Operand Caching,” ISLPED, (Aug. 2003).
Mack Michael J.
Ward Kenneth L.
Chan Eddie P
Gerhardt Diana R.
Giroux George D
International Business Machines - Corporation
Musgrove Jack V.
LandOfFree
Method and apparatus to launch write queue read data in a... 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 launch write queue read data in a..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus to launch write queue read data in a... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4131792