BFRXOR: a load-aware DDR4 address mapping method
Jundi Zou, Peng Wang, Xiaofen Hua, Yuheng Zhao, Shengtao Wu · 2025
In response to the issue of suboptimal bandwidth utilization in DDR4 memory subsystems under irregular memory access workloads, this paper proposes a load-aware address mapping method named BFRXOR (Bit Flip Rate XOR). By analyzing memory access workload characteristics and leveraging DDR4 architecture features, BFRXOR formulates adaptive mapping strategies to effectively distribute access pressure across Bank Groups and Banks. Experimental results demonstrate a maximum 32% performance improvement over traditional methods. This work provides critical theoretical insights for optimizing future memory controller designs.