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- Read-modify-write abstract "In computer science, read-modify-write is a class of atomic operations (such as test-and-set, fetch-and-add, and compare-and-swap) that both read a memory location and write a new value into it simultaneously, either with a completely new value or some function of the previous value. These operations prevent race conditions in multi-threaded applications. Typically they are used to implement mutexes or semaphores. These atomic operations are also heavily used in non-blocking synchronization.Maurice Herlihy (1991) ranks atomic operations by their consensus numbers, as follows: ∞: memory-to-memory move and swap, augmented queue, compare-and-swap, fetch-and-cons, sticky byte, load-link/store-conditional (LL/SC) 2n - 2: n-register assignment 2: test-and-set, swap, fetch-and-add, queue, stack 1: atomic read and atomic writeIt is impossible to implement an operation that requires a given consensus number with only operations with a lower consensus number, no matter how many of such operations one uses. Read-modify-write instructions often produce unexpected results when used on I/O devices, as a write operation may not affect the same internal register that would be accessed in a read operation.This term is also associated with RAID levels that perform actual write operations as atomic read-modify-write sequences. Such RAID levels include RAID 4, RAID 5 and RAID 6.".
- Read-modify-write wikiPageID "5587875".
- Read-modify-write wikiPageLength "2742".
- Read-modify-write wikiPageOutDegree "28".
- Read-modify-write wikiPageRevisionID "700890986".
- Read-modify-write wikiPageWikiLink Category:Computer_memory.
- Read-modify-write wikiPageWikiLink Category:Concurrency_control.
- Read-modify-write wikiPageWikiLink Compare-and-swap.
- Read-modify-write wikiPageWikiLink Computer_science.
- Read-modify-write wikiPageWikiLink Consensus_(computer_science).
- Read-modify-write wikiPageWikiLink Fetch-and-add.
- Read-modify-write wikiPageWikiLink Fetch-and-cons.
- Read-modify-write wikiPageWikiLink Hardware_register.
- Read-modify-write wikiPageWikiLink output.
- Read-modify-write wikiPageWikiLink Linearizability.
- Read-modify-write wikiPageWikiLink store-conditional.
- Read-modify-write wikiPageWikiLink Maurice_Herlihy.
- Read-modify-write wikiPageWikiLink Mutual_exclusion.
- Read-modify-write wikiPageWikiLink Non-blocking_algorithm.
- Read-modify-write wikiPageWikiLink RAID.
- Read-modify-write wikiPageWikiLink Race_condition.
- Read-modify-write wikiPageWikiLink Semaphore_(programming).
- Read-modify-write wikiPageWikiLink Standard_RAID_levels.
- Read-modify-write wikiPageWikiLink Sticky_byte.
- Read-modify-write wikiPageWikiLink Test-and-set.
- Read-modify-write wikiPageWikiLink Write_amplification.
- Read-modify-write wikiPageWikiLinkText "Read-modify-write".
- Read-modify-write wikiPageWikiLinkText "read, modify and write".
- Read-modify-write wikiPageWikiLinkText "read-modify-write".
- Read-modify-write wikiPageUsesTemplate Template:Comp-sci-stub.
- Read-modify-write wikiPageUsesTemplate Template:Portal.
- Read-modify-write wikiPageUsesTemplate Template:Reflist.
- Read-modify-write subject Category:Computer_memory.
- Read-modify-write subject Category:Concurrency_control.
- Read-modify-write hypernym Operations.
- Read-modify-write type MilitaryConflict.
- Read-modify-write type Array.
- Read-modify-write type Datum.
- Read-modify-write comment "In computer science, read-modify-write is a class of atomic operations (such as test-and-set, fetch-and-add, and compare-and-swap) that both read a memory location and write a new value into it simultaneously, either with a completely new value or some function of the previous value. These operations prevent race conditions in multi-threaded applications. Typically they are used to implement mutexes or semaphores.".
- Read-modify-write label "Read-modify-write".
- Read-modify-write sameAs Q1593306.
- Read-modify-write sameAs RMW-Befehl.
- Read-modify-write sameAs m.0dtz4t.
- Read-modify-write sameAs Q1593306.
- Read-modify-write wasDerivedFrom Read-modify-write?oldid=700890986.
- Read-modify-write isPrimaryTopicOf Read-modify-write.