cache coherence protocol

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• Cache coherence — In computing, cache coherence (also cache coherency) refers to the consistency of data stored in local caches of a shared resource. Multiple Caches of Shared Resource When clients in a system maintain caches of a common memory resource, problems… …   Wikipedia

• Coherence protocol — In computer science, a coherence protocol is a protocol which maintains the consistency between all the caches in a system of distributed shared memory; the protocol maintains memory coherence according to a specified consistency model.Examples… …   Wikipedia

• Cache coherency — In computing, cache coherency (also cache coherence) refers to the integrity of data stored in local caches of a shared resource. Cache coherence is a special case of memory coherence.When clients in a system maintain caches of a common memory… …   Wikipedia

• Cache — This article is about the computer science optimization concept. For other uses, see Cache (disambiguation). In computer engineering, a cache (  /ˈk …   Wikipedia

• Firefly protocol — The Firefly cache coherence protocol is the schema used in the DEC Firefly multiprocessor workstation, developed by DEC Systems Research Center. This protocol uses a write through policy. States In this protocol, the following states can be… …   Wikipedia

• MSI protocol — The MSI protocol is a basic cache coherence protocol that is used in multiprocessor systems. As with other cache coherency protocols, the letters of the protocol name identify the possible states in which a cache line can be. So, for MSI, each… …   Wikipedia

• Dragon protocol — The Dragon cache coherence protocol is the schema used in the Xerox Dragon multiprocessor workstation, developed by Xerox PARC. This protocol uses a write back policy. Contents 1 States 2 Transitions 3 References 4 See a …   Wikipedia

• Memory coherence — is an issue that affects the design of computer systems in which two or more processors or cores share a common area of memory.[1][2][3][4] In a uniprocessor system (whereby, in today s terms, there exists only one core), there is only one… …   Wikipedia

• MESI protocol — The MESI protocol (known also as Illinois protocol ) is a widely used cache coherency and memory coherence protocol. It is the most common protocol which supports write back cache. Its use in personal computers became widespread with the… …   Wikipedia

• Write-once (cache coherency) — In cache coherency protocol literature, Write Once is the first write invalidate protocol defined. It has the optimization of executing write update on the first write and a write invalidate on all subsequent writes, reducing the overall bus… …   Wikipedia

• MOSI protocol — The MOSI protocol is an extension of the basic MSI cache coherency protocol. It adds the Owned state, which indicates that the current processor owns this block, and will service requests from other processors for the block.ee also*Coherence… …   Wikipedia