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False sharing

In computer science, false sharing is a performance-degrading usage pattern that can arise in systems with distributed, coherent caches at the size of the smallest resource block managed by the caching mechanism. When a system participant attempts to periodically access data that is not being altered by another party, but that data shares a cache block…

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Multiprocessor CPU caches

MultiprocessorCPU cachesMemoryLinesPower of two
11 related topics

Mitigation

The C++ programming languageC++23
2 related topics

Overview

Computer scienceCoherent caches
2 related topics

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Overview

Multiprocessor CPU caches

Mitigation

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Map overview Semantic statistics

False sharing

Nodes19
Edges18
Triples27
Avg. degree1.89
Density0.105263
Components1

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False sharing

Top relations

related to Example · 7
False sharing → As, Each, Intel Core, It, The, This, Those
related to Multiprocessor CPU caches · 6
False sharing → By, CPU, False, If, In, RAM
related to External links · 5
False sharing → Dr Dobbs, Easy Understanding, Eliminate False SharingBe, False SharingC, Java
related to Mitigation · 5
False sharing → Compile-time, CPU, For, However, There
is a · 2
False sharing → inherent artifact of automatically synchronized cache protocols and can also exist in environments such as distributed file systems or databases, performance-degrading usage pattern that can arise in systems with distributed

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Important terminology

false sharing system caches data block caching systems may access size cache resource participant first memory cpu also threads one

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
False sharingis aperformance-degrading usage pattern that can arise in systems with distributed0.90text
False sharingis ainherent artifact of automatically synchronized cache protocols and can also exist in environments such as distributed file systems or databases0.90text
distributed file systems or databasesinstance ofFalse sharing is an inherent artifact of automatically synchronized cache protocols and can also exist in environments0.80text
but current prevalence is limited to RAM cachesinstance ofFalse sharing is an inherent artifact of automatically synchronized cache protocols and can also exist in environments0.80text
False sharingrelated to ExampleThis0.60section
False sharingrelated to ExampleIt0.60section
False sharingrelated to ExampleEach0.60section
False sharingrelated to ExampleThe0.60section
False sharingrelated to ExampleThose0.60section
False sharingrelated to ExampleIntel Core0.60section
False sharingrelated to ExampleAs0.60section
False sharingrelated to External linksEasy Understanding0.60section

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    Min side: 3
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