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| | CPU cache - Wikipedia, the free encyclopedia |
 | | A CPU cache is a cache used by the central processing unit of a computer to reduce the average time to access memory. | | | The first hardware cache used in a computer system was not actually a data or instruction cache, but rather a TLB. | | | These predictors are caches in the sense that they store information that is costly to compute. |
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http://en.wikipedia.org/wiki/CPU_cache
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| | Cache |
| | In computer science, a cache is a collection of data duplicating original values stored elsewhere or computed earlier, where the original data is expensive (usually in terms of access time) to fetch or compute relative to reading the cache. | | | Caches have proved extremely effective in many areas of computing, because access patterns in typical computer applications have locality of reference. | | | In this sense, the phrases disk cache and cache buffer are misnomers, and the embedded computer's memory is more appropriately called the disk buffer. |
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http://hallencyclopedia.com/Cache
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| | Cache Coherency Encyclopedia Article, Definition, History, Biography |
| | Cache coherency is intended to manage such conflicts and maintain consistency between cache and memory. | | | Cache coherency (alternatively cache coherence or cache consistency) refers to the integrity of data stored in local caches of a shared resource. | | | Coherency models differ in performance and scalability so must be evaluated for each system design. |
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http://www.greatartworks.com/encyclopedia/Cache_coherency
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| | Maintaining Web Cache Coherency |
| | Each cache within the federation is responsible of the validity of the documents cached in its local storage; it propagates the information among the other cache servers. | | | The fact that different implementations of the cache server software are being used on different servers and the lack of standardization has worsen the problem. | | | Sorting the cached documents allows to identify which document to remove when the cache is full (details of the simulation platform are presented in Belloum & Hertzberger, 1998). |
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http://informationr.net/ir/6-1/paper91.html
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| | Piggyback Server Invalidation for Proxy Cache Coherency |
| | Jeff Mogul's work on callback-based caching in NFS [10] dealt with revocation (indicating that a cached instance has changed on the disk). | | | Previously, we studied piggyback cache validation (PCV) [7], a technique to improve cache coherency and reduce the cache validation traffic between proxy caches and servers. | | | The pcvadapt policy implements piggyback cache validation where on a request to a server, a proxy client piggybacks a list (maximum size of 50 used in study) of cached, but potentially stale resources from that server for validation [7]. |
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http://web.cs.wpi.edu/~cew/papers/www7/www7.html
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| | Cache Coherency |
| | Cache coherency (alternatively cache coherence or cache consistency) is the property that accessing a cache gives the same value as the underlying data, even when the data was modified by a different process after the caching was performed. | | | This is important for consistent operation of multiprocessor (and is mimicked in distributed shared memory systems) in which each CPU has a non-shared cache of a shared memory area. | | | Digital Media Transmission ("DMT(R)") technology, audio/video enhancement and synchronization technology, computer memory cache coherency technology, credit... |
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http://www.wikiverse.org/cache-coherency
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| | cache coherency Computer Encyclopedia Enterprise Resource Directory Complete Guide to Internet |
| | If caches are used with shared memory then some system is required to detect when data in one processor's cache should be discarded or replaced because another processor has updated that memory location. | | | Some {parallel processors} do not cache accesses to {shared memory} to avoid the issue of cache coherency. | | | (Or "cache consistency") /kash koh-heer'n-see/ The synchronisation of data in multiple {caches} such that reading a memory location via any cache will return the most recent data written to that location via any (other) cache. |
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http://jaysir.com/computer-encyclopedia/c/cache-coherency-computer-terms.htm
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| | Cache Coherency and Consistency |
| | Processors may cache memory from their local node only; references to memory on other nodes are not cached. | | | Unlike other Cray systems, cache coherency on Cray X1 systems is supported by a directory-based hardware protocol. | | | Cache coherency problems can arise when more than one processor refers to the same data. |
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http://docs.cray.com/books/S-2315-50/html-S-2315-50/zfixedgtci5niw.html
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| | Ace's Hardware - General Message Board |
| | AFAIK, cache coherency is basis of the SMT. | | | I was wasting my time with cache coherency problems 10 years ago. | | | The used cache coherency technologies are in no direct relation to a certain x86 ISA. |
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http://www.aceshardware.com/forums/read_post.jsp?id=115142319&forumid=1
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| | 3.3 Cache coherency |
| | This is an area that would be quite timely, as cache coherence is an important problem. | | | Republished in ``The Cache Coherence Problem in Shared Memory Multiprocessors: Hardware Solutions'', ed. | | | In general, I think that there is some work to be done in proving various protocols correct- especially some of the complex schemes such as Stanford is using in the DASH project, and that the SCI (scalable coherent interconnect) people are using. |
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http://www.cl.cam.ac.uk/users/mjcg/Research94/node13.html
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| | Method and apparatus for assuring cache coherency (US6295581) |
| | Access to memory is facilitated by a cache memory access system that includes individual buffers for storing and processing data access commands asynchronously, while also assuring data coherency and avoiding deadlock. | | | The use of discrete buffers for cache memory access is particularly well suited to pipeline processes. | | | Method and device using a redundant cache for preventing the loss of dirty data |
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http://www.delphion.com/details?&pn=US06295581__
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| | Cache Coherency Histogram Table |
| | When designing a cache coherence scheme, or evaluating its effectiveness, it is important to know the typical access patterns that can be expected. | | | The cache coherency hit table provides a way for monitoring hardware to gather detailed information about the cache coherency state of accessed memory locations. | | | In addition, a cache line can be locked or unlocked in each state. |
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http://www.eecg.toronto.edu/RESEARCH/ParallelSys/numachin.hier/node22.html
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| | Hardware cache coherency |
| | Update all cached copies at the time of a store. | | | On miss may read data from other cache (faster). | | | only a single cached copy of the data exist at the time of a store, |
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http://www.cse.unsw.edu.au/~cs9242/02/lectures/10-smp/node11.html
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| | cache coherency |
| | Posted : 4/13/2003 3:28:45 PM when different processes try to access the same cache there is an issue of cache coherency.basically there is no problem for reading from cache but if any process tries to write into the cache and thereby change data before other memories are updated then it is a problem. | | | L1 or level_1 memories could be caches (data and instruction) or for that matter high speed SRAMs. | | | These may again have caches depending upon application. |
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http://www.vlsibank.com/sessionspage.asp?titl_id=140
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| | Robotics Institute: Verifying Distributed Directory-based Cache Coherency Protocols: S3.mp, a Case Study |
| | Verifying Distributed Directory-based Cache Coherency Protocols: S3.mp, a Case Study | | | Robotics Institute: Verifying Distributed Directory-based Cache Coherency Protocols: S3.mp, a Case Study | | | The S3.mp protocol uses a distributed directory with limited number of pointers and hardware supported overflow handling that keeps processing nodes sharing a data block in a singly linked list. |
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http://www.ri.cmu.edu/pubs/pub_4941.html
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| | Robotics Institute: Exploiting Parallelism in Cache Coherency Protocol Engines |
| | This paper discusses the design space for high perfor- mance cache coherency controllers and describes the architecture of the programmable protocol engines that were developed for the S3.mp shared memory multiproces- sor. | | | Scalable systems implementing such memory models rely on cache coherency protocols that use dedicated hardware. | | | Shared memory multiprocessors are based on memory models, which are precise contracts between hard- and software that spell out the semantics of memory operations. |
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http://www.ri.cmu.edu/pubs/pub_4940.html
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| | Research projects |
| | Simplicity Versus Accuracy in a Model of Cache Coherency Overhead, S.J. Eggers, IEEE Transactions on Computer, 40:8 (August 1991). | | | Evaluating the Performance of Four Snopping Cache Coherency Protocols, S.J. Eggers and R.H. Katz, International Symposium on Computer Architecture (June 1989). | | | Implementing a Cache Consistency Protocol, R.H. Katz, S.J. Eggers, D.A. Wood, C.L. Perkins, and R.G. Sheldon, International Symposium on Computer Architecture (June 1985). |
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http://www.cs.washington.edu/homes/eggers/Research/coherency.html
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| | Intel, AMD sued over memory cache coherency |
| | In a statement it said memory cache coherency technology allows peripheral devices to communicate with system memory. | | | CALIFORNIAN company Acacia Research Corp., said its subsidiary, Computer Cache Coherency Corporation, has added chip-makers Intel and AMD to the list of companies it wants to sue for infringing its patents. | | | It claims the technology was used by Intel, AMD and VIA in desktop notebook and server systems so now it is seeking recompense. |
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http://www.theinquirer.net/?article=23007
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| | Cache Coherency |
| | If cache line is updated by another processor, get it from that processor’s cache | | | Processors snoop on the bus for updated cache lines in other processor’s cache |
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http://archive.ncsa.uiuc.edu/SCD/Training/materials/html/old/ArchOver-0498/tsld015.htm
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