| Title |
Analysis of Remote Memory Access Impact on Application Performance in Heterogeneous Memory Systems |
| Authors |
김민재(Minjae Kim) ; 노원우(Won Woo Ro) |
| DOI |
https://doi.org/10.5573/ieie.2025.62.3.21 |
| Keywords |
Heterogeneous memory system; Remote memory access; CXL (Compute eXpress Link) |
| Abstract |
As memory demands for server scale applications have surged, CXL (Compute Express Link)-based heterogeneous memory systems have emerged as a promising solution. This paper analyzes the performance degradation experienced by server-scale applications due to remote memory access in a heterogeneous memory system. While CXL memory provides greater scalability over traditional DIMMs by leveraging the PCIe interface, it incurs higher memory access latency, potentially impacting performance. Given the current unavailability of CXL memory cards on the market, this study evaluates two experimental approaches: first, simulating remote DRAM on an FPGA environment to assess performance sensitivity using SPEC benchmarks; second, emulating CXL memory on a dual-socket server to measure the performance of various applications. Results indicate that applications with high remote memory access frequency suffer from significant performance degradation. This study underscores the importance of minimizing remote memory access in heterogeneous memory system design to enhance performance. |