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The name weak consistency can be used in two senses. In the first sense, strict and more popular, weak consistency is one of the consistency models used in the domain of concurrent programming (e.g. in distributed shared memory, distributed transactions etc.). A protocol is said to support weak consistency if:
The release consistency model relaxes the weak consistency model by distinguishing the entrance synchronization operation from the exit synchronization operation. Under weak ordering, when a synchronization operation is to be seen, all operations in all processors need to be visible before the synchronization operation is done and the processor ...
Consistency as defined here is sometimes referred to as weak consistency. When we replace convergence in probability with almost sure convergence, then the estimator is said to be strongly consistent. Consistency is related to bias; see bias versus consistency.
Weak consistency (reads and writes are arbitrarily reordered, limited only by explicit memory barriers) On some CPUs Atomic operations can be reordered with loads and stores. [14] There can be incoherent instruction cache pipeline, which prevents self-modifying code from being executed without special instruction cache flush/reload instructions.
Processor consistency is one of the consistency models used in the domain of concurrent computing (e.g. in distributed shared memory, distributed transactions, etc.).. A system exhibits processor consistency if the order in which other processors see the writes from any individual processor is the same as the order they were issued.
Release consistency requires more from the programmers compared to weak ordering. They must label synchronization accesses as acquires or releases, not just as synchronization accesses. Similar to weak ordering, Release consistency allows the compiler to freely reorder loads and stores except that they cannot migrate upward past an acquire ...
Intense competition, hefty capital spending needs and erratic regulation have made the communications sector an investment minefield. But Comcast Corp (CMCSA) remains a model of consistency ...
Causal consistency; Consistency model; D. Delta consistency; E. ... Weak consistency This page was last edited on 14 August 2016, at 19:27 (UTC). ...