CSC 456 Spring 2012/10b CP: Difference between revisions
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== Models in Use == | == Models in Use == | ||
Strict Consistency | ===Strict Consistency=== | ||
Sequential Consistency | ===Sequential Consistency=== | ||
Weak Consistency | ===Weak Consistency=== | ||
== Performance == | == Performance == | ||
Revision as of 17:36, 23 April 2012
Romanescu, Lebeck, and Sorin make a great point that "The most important feature of a computer is correct execution." Computers are expected to produce correct output consistently. Memory consistency -- the intentional ordering of all reads and writes to memory addresses (Solihin) -- plays a crucial role in guaranteeing that the results of running a program are the results intended by the programmer. Maintaining memory consistency is a problem on all multiprocessor machines (Solihin).
Models in Use
Strict Consistency
Sequential Consistency
Weak Consistency
Performance
From best to worst: Weak Consistency Sequential Consistency Strict Consistency