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In computer science, locality of reference, also known as the principle of locality, [1] is the tendency of a processor to access the same set of memory locations repetitively over a short period of time. [2] There are two basic types of reference locality – temporal and spatial locality.
In computing, a memory access pattern or IO access pattern is the pattern with which a system or program reads and writes memory on secondary storage.These patterns differ in the level of locality of reference and drastically affect cache performance, [1] and also have implications for the approach to parallelism [2] [3] and distribution of workload in shared memory systems. [4]
Most modern CPUs are so fast that for most program workloads, the bottleneck is the locality of reference of memory accesses and the efficiency of the caching and memory transfer between different levels of the hierarchy [citation needed]. As a result, the CPU spends much of its time idling, waiting for memory I/O to complete.
This page was last edited on 9 October 2013, at 20:58 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may ...
Specifically, the term local realism in the context of Bell's theorem cannot be viewed as a kind of "realism" involving locality other than the kind implied by the Bell screening assumption. This conflict between common ideas of realism and quantum mechanics requires careful analysis whenever local realism is discussed.
Locality of Reference also applies to other kinds of resources, such as web pages and even parking spaces. The topic of memory locality is a subset of the broader topic of locality of reference. - Rrcjab 23:44, 3 March 2007 (UTC) It seemed pretty clear to me that nobody supports merging "Locality of reference" into "Memory locality".
A reference to a live distributed object is another example: it is a complete specification for how to construct a small software component called a proxy that will subsequently engage in a peer-to-peer interaction, and through which the local machine may gain access to data that is replicated or exists only as a weakly consistent message ...
A simple anticipatory paging algorithm will bring in the next few consecutive pages even though they are not yet needed (a prediction using locality of reference); this is analogous to a prefetch input queue in a CPU. Swap prefetching will prefetch recently swapped-out pages if there are enough free pages for them. [8]