基于Cache时隙冲突图的面向能耗SPM动态优化

为降低嵌入式系统的能耗，该文提出一种基于Cache和SPM共存架构的优化方法. 根据Cache时隙冲突图对数据Cache的行为进行建模，然后采用整数非线性规划算法，将每个时隙中引起Cache缺失的数据页选出，并采用虚存管理机制将其重映射到SPM中. 为了降低SPM动态分配的代价，提出一种具有紧耦合DMA的SPM控制器，可在不中断CPU的情况下进行数据页的搬运与地址重映射. 这种方法可以对整个数据段进行优化，包括全局数据、堆和栈，并在不降低系统性能的前提下获得平均24.83%的能耗收益.

Energy-Oriented Dynamic SPM Allocation Based on Time-Slotted Cache Conflict Graph

In this paper,an allocation strategy is proposed to optimize energy of memory system.A timeslotted cache conflict graph is proposed to model the behavior of data cache conflict.An integer nonlinear programming(INP) is implemented,which can avoid time-consuming linearization process,to select the most profitable data pages and employ a virtual memory system to remap those data pages that can cause severe cache conflict within a time slot,to the on-chip scratchpad memory(SPM).To minimize the swapping overhead...