CSC/ECE 506 Spring 2012/10a dr

Prefetching and consistency models

Introduction

In

Prefetching

a

B

h

C

If k

D

controversial.

Consistency models

The memory consistency model in shared memory parallel programming controls the order in which memory operations performed by one thread may be observed by another. The most natural model for programmers is to have memory accesses appear to take effect in the order specified in the original program. Language designers have been reluctant to use this strong semantics, called sequential consistency, due to concerns over the performance of memory fence instructions and related mechanisms that guarantee order.

F

When

G

So

Conclusion

H

Using

I

Even

External links

1. Sequential hardware prefetching in shared-memory multiprocessors

References

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