Patent ID: 7516359
Filing Date: 2009-04-07
Classification: G06F

Abstract:
1. A system comprising: a processor module that includes a master processor and a slave processor that operate in lockstep; error detection logic for detecting loss of lockstep (LOL) for the processor module; firmware for determining at least one of type of the detected LOL and source of the detected LOL; and firmware for determining, based at least in part on the determined at least one of type and source, a responsive action to the detected LOL, wherein said firmware for determining said responsive action comprises firmware for determining whether to attempt to reestablish lockstep for the processor module without shutting down an operating system of the system, wherein said firmware for determining said responsive action comprises firmware for, if the source of the detected LOL is unknown, determining not to attempt to reestablish lockstep for the processor module without shutting down an operating system of the system.