'Memory consistency model' diaporamas de présentation

Topic 4

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Memory Consistency

Memory Consistency. Zhonghai Lu, Axel Jantsch . Outline. Introduction What is a memory consistency model? Who should care? Memory consistency models Strict consistency Sequential consistency Relaxed consistency models Processor, weak ordering, release consistency Summary.

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SMP Systems

SMP Systems. MIMD. Shared Memory. UMA. NUMA. ccNUMA. nccNUMA. COMA. Uniform Memory Architectures (UMA). UMA or Symmetric Multiprocessors (SMP) are shared memory systems with the following characteristics global physical address space

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Lecture 1 4

Lecture 1 4. The C++ Memory model Synchronization variables Implementing synchronization. Memory strides. Some nearest neighbors that are nearby in space are far apart in memory Stride = memory distance along the direction we are moving: N along the vertical dimension

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Memory Consistency Models

Memory Consistency Models. Adve, Pai, and Ranganathan. Recent advances in memory consistency models for hardware shared-memory systems, 1999. Gniady, Falsafi, and Vijaykumar . Is SC+ILP=RC? , 1999. Hill. Multiprocessors should support simple memory consistency models , 1998.

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Memory Consistency Models

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Ch4. Multiprocessors & Thread-Level Parallelism 4. Syn ( Syn chronization & Memory Consistency)

ECE Department University of Massachusetts Dartmouth 285 Old Westport Rd. North Dartmouth, MA 02747-2300. Ch4. Multiprocessors & Thread-Level Parallelism 4. Syn ( Syn chronization & Memory Consistency). ECE562/468 Advanced Computer Architecture Prof. Honggang Wang.

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CS 213 Lecture 7: Multiprocessor 3: Synchronization, Prefetching

CS 213 Lecture 7: Multiprocessor 3: Synchronization, Prefetching. Synchronization. Why Synchronize? Need to know when it is safe for different processes to use shared data Issues for Synchronization: Uninterruptable instruction to fetch and update memory (atomic operation);

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