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Title: Store operations to maintain cache coherence

Patent ·
OSTI ID:1373722
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In one embodiment, a computer-implemented method includes encountering a store operation during a compile-time of a program, where the store operation is applicable to a memory line. It is determined, by a computer processor, that no cache coherence action is necessary for the store operation. A store-without-coherence-action instruction is generated for the store operation, responsive to determining that no cache coherence action is necessary. The store-without-coherence-action instruction specifies that the store operation is to be performed without a cache coherence action, and cache coherence is maintained upon execution of the store-without-coherence-action instruction.

Research Organization:
International Business Machines Corp., Armonk, NY (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
B599858
Assignee:
INTERNATIONAL BUSINESS MACHINES CORPORATION
Patent Number(s):
9,720,832
Application Number:
14/671,050
OSTI ID:
1373722
Resource Relation:
Patent File Date: 2015 Mar 27
Country of Publication:
United States
Language:
English

References (10)

Selective coherency control patent April 2011
Handling of write access requests to shared memory in a data processing apparatus patent September 2012
Reducing runtime coherency checking with global data flow analysis patent February 2013
Techniques for Cache Injection in a Processor System from a Remote Node patent-application October 2010
Apparatus, System, and Method for Cache Coherency Elimination patent-application December 2010
Multi-Petascale Highly Efficient Parallel Supercomputer patent-application September 2011
Sharing Virtual Functions in a Shared Virtual Memory between Heterogeneous Processors of a Computing Platform patent-application July 2013
Automatic software cache coherence through vectorization conference January 1992
The IBM RISC System/6000 processor: Hardware overview journal January 1990
Cohesion: a hybrid memory model for accelerators conference January 2010

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97 MATHEMATICS AND COMPUTING