US 7,502,958 B2
SYSTEM AND METHOD FOR PROVIDING FIRMWARE RECOVERABLE LOCKSTEP PROTECTIONGeneral
US 7,502,958 B2
SYSTEM AND METHOD FOR PROVIDING FIRMWARE RECOVERABLE LOCKSTEP PROTECTION
Tech Center:
2100 Computer Architecture and Software
Examiner:
Dieu-Minh Le
Art Unit:
2114 Computer Error Control, Reliability, & Control Systems
Inventors:
Scott L. Michaelis; Anurupa Rajkumari; William B. McHardy
Assignee:
Priority:
10/25/04
Filed:
10/25/04
Granted:
03/10/09
Expiration:
07/13/26
Abstract
According to at least one embodiment, a method comprises detecting loss of lockstep for a pair of processors. The method further comprises triggering, by firmware, an operating system to idle the processors, and recovering, by the firmware, lockstep between the pair of processors. After lockstep is recovered between the pair of processors, the method further comprises triggering, by the firmware, the operating system to recognize the processors as being available for receiving instructions.
Cooperative Patent Classification (CPC)
G06G06F11/1658G06F