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Patent
G - Physics
06
F
G06F 15/167 (2006.01) G06F 9/22 (2006.01) G06F 9/52 (2006.01) G06F 12/00 (2006.01) G06F 12/14 (2006.01) G06F 13/18 (2006.01)
Patent
CA 2435148
A system and method for lock caching for compound atomic operations (i.e. a read or write operation to more than one 4-byte word) on shared memory is provided. In a computer system including a memory shared among a plurality of processing entities, for example, multiple threads, a method of performing compound atomic operations comprises providing a pool of lacks for synchronizing access to the memory; assigning the locks among the plurality of entities to minimize lock contention; and performing the compound atomic operations using the assigned locks. Each lock may be assigned in accordance with an address of the shared memory from the processing entity's compound atomic operations. Assigning locks may be performed in a manner to minimize concurrent atomic updates to the same or overlapping portions of the shared memory. For example, the addresses of the memory from the compound atomic operations may be aliased in accordance with a known upper bound on the amount of the shared memory that may be affected by any atomic operation.
Blainey Robert J.
Silvera Raul E.
Ibm Canada Limited - Ibm Canada Limitee
Saunders Raymond H.
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