基于Amdahl定律扩展的多核处理器性能模型研究

摘要

通过引入应用程序并行特征、通信开销、资源限制等因素,建立了基于Amdahl定律扩展的多核处理器性能模型.通过模型参数仿真,搜索面向特定应用的多核处理器设计空间,得出如下规律:增大计算核心规模可实现超线性加速比;结构应优先选择异构结构;设计多进程、大容量的共享通信区可降低核间通信开销;计算核心数目和规模由应用程序并行度和各并行部分比例及设计规模决定.%Accounting uneven workload allocation,hardware bounds and communication latency,a performance analytic model is derived based on extended Amdahl''s law for multicore processors.The speedup model can be applied as a guide for hardware design as well as a performance prediction model in multicore processors domain.The design space for the specific multicore processors is explored.According to the results,some suggestions about how to design the specific multicore processors,such as the architecture type (homogenous or heterogeneous),the number of cores integrated in the multicore system,the scale of cores to execute computing workload,and the communication area,are provided to the designers.