[세미나 안내] UIUC 김남승 교수 초청특강: "CXL memory expander: performance characterizations and page allocation policies"
- ice
- 조회수505
- 2024-01-08
컴퓨터구조 분야의 세계적인 석학이신 University of Illinois Urbana-Champaign의 김남승 교수님을 모시고 다음과 같이 세미나를 개최합니다.
관심 있는 학생분들의 많은 참여 부탁드립니다.
○ 일시: 1월 17일(수) 오후 2시
○ 장소: 반도체관 400102호
○ 주제: CXL memory expander: performance characterizations and page allocation policies
- 초록: The ever-growing demands for memory with larger capacity and higher bandwidth have driven recent innovations on memory expansion and disaggregation technologies based on Compute eXpress Link (CXL). Especially, CXL-based memory expansion technology has recently gained notable attention for its ability not only to economically expand memory capacity and bandwidth but also to decouple memory technologies from a specific memory interface of the CPU. However, since CXL memory devices have not been widely available, they have been emulated using DDR memory in a remote NUMA node. In this paper, for the first time, we comprehensively evaluate a true CXL-ready system based on the latest 4th-generation Intel Xeon CPU with three CXL memory devices from different manufacturers. Specifically, we run a set of microbenchmarks not only to compare the performance of true CXL memory with that of emulated CXL memory but also to analyze the complex interplay between the CPU and CXL memory in depth. This reveals important differences between emulated CXL memory and true CXL memory, some of which will compel researchers to revisit the analyses and proposals from recent work. Next, we identify opportunities for memory-bandwidth-intensive applications to benefit from the use of CXL memory. Lastly, we propose a CXL-memory-aware dynamic page allocation policy, Caption to more efficiently use CXL memory as a bandwidth expander. We demonstrate that Caption can automatically converge to an empirically favorable percentage of pages allocated to CXL memory, which improves the performance of memory-bandwidth-intensive applications by up to 24% when compared to the default page allocation policy designed for traditional NUMA systems.
- 강연자: I am the W.J. ‘Jerry’ Sanders III – Advanced Micro Devices, Inc. Endowed Chair Professor at the University of Illinois, Urbana-Champaign and a fellow of ACM, IEEE, and NAI. From 2018 to 2020, I took a leave of absence and as a Sr. Vice President at a major memory manufacturing company I led the development of next-generation DRAM products, including the industry's first HBM-PIM that will play a significant role in shaping the future computing landscape. I have published more than 250 refereed articles to highly-selective conferences and journals in the field of digital circuit, processor architecture, and computer-aided design. The top three most frequently cited papers have more than 5000 citations and the total number of citations of all my papers approaches 16000. I was a recipient of many internationally recognized awards, including ACM/IEEE Most Influential ISCA Paper Award in 2017, and SIGMICRO 2021 Test of Time Awards in 2021. I am a hall of fame member of all three major computer architecture conferences, IEEE HPCA , MICRO, and ISCA. Lastly, I am the first Korean who received these titles, awards, and recognitions mentioned above in the computer architecture field.