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Memory barrier

In computing, a memory barrier, also known as a membar, memory fence or fence instruction, is a type of barrier instruction that causes a central processing unit (CPU) or compiler to enforce an ordering constraint on memory operations issued before and after the barrier instruction. This typically means that operations issued prior to the barrier are…

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Out-of-order execution versus compiler reordering optimizations

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Memory barrier

Nodes32
Edges31
Triples39
Avg. degree1.94
Density0.0625
Components1

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Memory barrier

Top relations

related to Further reading · 21
Memory barrier → Archived, Compiler Barriers, Handling Memory Ordering, July, June, Linux Journal, McKenney, Memory Barriers, Memory Fences, Memory Ordering, Modern Microprocessors, Multithreaded Applications, Oracle, Oracle Solaris Studio, Part, Part II, Paul, PDF, Retrieved July, September
related to Out-of-order execution versus compiler reordering optimizations · 9
Memory barrier → Although, Compilers, I/O, In, Memory, Memory-mapped I/O, Omissions, The, Therefore
related to Example · 8
Memory barrier → CPU, CPUs, Different, For, However, It, Multiple, When

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Important terminology

memory operations ordering program compiler execution may thread hardware multiple barriers out-of-order barrier volatile software threads processor value 2026 code

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
pthreads as opposed to a hardware threadinstance ofi.e. a software thread0.80text
Memory barrierrelated to ExampleWhen0.60section
Memory barrierrelated to ExampleCPU0.60section
Memory barrierrelated to ExampleHowever0.60section
Memory barrierrelated to ExampleCPUs0.60section
Memory barrierrelated to ExampleFor0.60section
Memory barrierrelated to ExampleDifferent0.60section
Memory barrierrelated to ExampleIt0.60section
Memory barrierrelated to ExampleMultiple0.60section
Memory barrierrelated to Further readingMcKenney0.60section
Memory barrierrelated to Further readingPaul0.60section
Memory barrierrelated to Further readingJune0.60section

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