Fault containment system for multiprocessor with shared memory

Details Fault containment system for multiprocessor with shared memory Fault containment system for multiprocessor with shared memory

G - Physics

06

F

G06F 11/14 (2006.01) G06F 11/00 (2006.01) G06F 15/16 (2006.01)

Patent

CA 2078311

Abstract A multiprocessor system has a plurality of processing cells, each including a processor and memory, interconnected via a network. The memories respond to requests by the processors for accessing data and, absent fault, transmitting it in response packets to at least to the requesting processors. A fault containment element responds to at least certain faults during access or transmission of a datum for including within the respective response packet a fault signal that prevents the requestor from accessing the datum. If a fault is detected in a datum not previously detected as faulty, a marking element can include a "marked fault" signal in the response packet. Whereas, it can include an "unmarked fault" signal when it detects a fault associated with a requested datum, but not specifically isolated to that datum. When a request is made for a datum which had previously been detected as faulty, the marking element can include in the response packet a "descriptor fault" signal. This facilitates identification of a particular source of an error and prevents that error from propagating to other processing cells. - 56 -

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