Method and system for efficient tentative tracing of...

Details Method and system for efficient tentative tracing of... Method and system for efficient tentative tracing of...

2011-02-01

2011-02-01

Chan, Eddie P (Department: 2183)

Electrical computers and digital processing systems: processing

Processing control

Branching

C714S045000, C712S219000

Reexamination Certificate

active

07882337

ABSTRACT:
A method of tentative tracing execution events in a multiprocessor system. Each processor stores tentative events in a corresponding buffer. The processor sets pointers in an array to a head and tail of a thread. When a condition triggers a tentative thread to be committed, the processor marks the first event as committed and sets the pointers to a null value. When a condition triggers the thread to be discarded, the processor marks the first event as discarded and sets the pointers to a null value. The processor makes the buffer available to a consumer process, which extracts the first event. If the first event is marked as committed, the consumer process follows a link to a second event of the thread and marks the second event as committed. If the first event is marked as discarded, the second event is marked as discarded and the first event is skipped.

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Smolders, LR, “Techniques to Take Instruction Level Traces in an SMP Environment,” TDB v40 n11, Nov. 1997, pp. 159-162, Austin.

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