Electrical computers and digital processing systems: memory – Storage accessing and control – Hierarchical memories
Reexamination Certificate
2008-07-08
2008-07-08
Kim, Hong (Department: 2185)
Electrical computers and digital processing systems: memory
Storage accessing and control
Hierarchical memories
C711S150000, C711S151000, C711S152000, C711S163000, C712S208000
Reexamination Certificate
active
07398355
ABSTRACT:
One embodiment of the present invention provides a system that avoids locks by transactionally executing critical sections. During operation, the system receives a program which includes one or more critical sections which are protected by locks. Next, the system modifies the program so that the critical sections which are protected by locks are executed transactionally without acquiring locks associated with the critical sections. More specifically, the program is modified so that: (1) during transactional execution of a critical section, the program first determines if a lock associated with the critical section is held by another process and if so aborts the transactional execution; (2) if the transactional execution of the critical section completes without encountering an interfering data access from another process, the program commits changes made during the transactional execution and optionally resumes normal non-transactional execution of the program past the critical section; and (3) if an interfering data access from another process is encountered during transactional execution of the critical section, the program discards changes made during the transactional execution, and attempts to re-execute the critical section zero or more times.
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Chaudhry Shailender
Moir Mark S.
Tremblay Marc
Ayash Marwan
Kim Hong
Park, Vaughn & Fleming LLP
Sun Microsystems Inc.
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