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Real PRAM Programming

机译:真正的PRAM编程

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摘要

The SB-PRAM is a parallel architecture which uses ⅰ) multithreading in order to hide latency, ⅱ) a pipelined combining butterfly network in order to reduce hot spots and ⅲ) address hashing in order to randomize network traffic and to reduce memory module congestion. Previous work suggests that such a machine will efficiently simulate shared memory with constant access time independent of the number of processors (i.e. the theoretical PRAM model) provided enough threads can be kept busy. A prototype of a 64 processor SB―PRAM has been completed. We report some technical data about this prototype as well as performance measurements. On all benchmark programs measured so far the performance of the real machine was at most 1,37 % slower than predicted by simulations which assume perfect shared memory with uniform access time.
机译:SB-PRAM是一种并行体系结构,它使用ⅰ)多线程处理以隐藏延迟,a)使用流水线组合蝶形网络以减少热点,以及ⅱ)使用地址散列以使网络流量随机化并减少内存模块的拥塞。先前的工作表明,只要有足够的线程可以保持忙碌,这种机器将以恒定的访问时间有效地模拟共享内存,而与访问处理器的数量(即理论PRAM模型)无关。 64处理器SB-PRAM的原型已经完成。我们报告有关该原型以及性能测量的一些技术数据。在迄今为止测得的所有基准程序上,真实计算机的性能最多比模拟所预测的要慢1.37%,模拟所假设的是完美的共享内存且访问时间均匀。

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