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Modeling and evaluation for gather/scatter operations in Vector-SIMD architectures

机译:Vector-SIMD体系结构中收集/分散操作的建模和评估

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Gather/scatter are state of the art vector memory access modes in Vector-SIMD architectures. However, because of the stochastic and complicated properties, the hardware design of gather/scatter operations lacks theoretical analysis and modeling. This paper proposes a model for gather/scatter operations on local vector memory for the first time. The model can not only give all the possible distributions of access locations, calculate the probability of access conflicts and predict the number of access conflicts, but also can provide the theoretical guidance for the performance optimization. This model is validated through experiments which can guide users to more specifically design and optimize the implementation of gather/scatter operations.
机译:聚集/分散是Vector-SIMD体系结构中最先进的向量存储器访问模式。但是,由于属性的随机性和复杂性,收集/分散操作的硬件设计缺乏理论分析和建模。本文首次提出了一种在本地向量存储器上进行收集/分散操作的模型。该模型不仅可以给出访问位置的所有可能分布,计算访问冲突的概率并预测访问冲突的数量,而且可以为性能优化提供理论指导。该模型通过实验进行了验证,该实验可以指导用户更具体地设计和优化收集/分散操作的实现。

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