2026

MAC: Metadata Acceleration for Sustainable Performance in Big-Data Systems with CXL DRAM

Dusol Lee, Yan Sun, Houxiang Ji, Vinit Gupta, Austin Antony Cruz, Inhyuk Choi, Nam Sung Kim, Jihong Kim

20th USENIX Symposium on Operating Systems Design and Implementation (OSDI) 2026

[Scholar]

MAC: Metadata Acceleration for Sustainable Performance in Big-Data Systems with CXL DRAM

Dusol Lee, Yan Sun, Houxiang Ji, Vinit Gupta, Austin Antony Cruz, Inhyuk Choi, Nam Sung Kim, Jihong Kim

20th USENIX Symposium on Operating Systems Design and Implementation (OSDI) 2026

[Scholar]

Characterizing CXL Memory Management in a Production Cluster Management Host Agent

Matteo Olivi, Aubhro Sengupta, Jimin Lee, Houxiang Ji, Jungmin Choi, Ada Gavrilovska

5th Workshop on Heterogeneous Composable and Disaggregated Systems (HCDS) 2026

Characterizing CXL Memory Management in a Production Cluster Management Host Agent

Matteo Olivi, Aubhro Sengupta, Jimin Lee, Houxiang Ji, Jungmin Choi, Ada Gavrilovska

5th Workshop on Heterogeneous Composable and Disaggregated Systems (HCDS) 2026

PAGE: Processing-Using-DRAM Architecture-Circuits Co-Optimization for Efficient Acceleration of General Matrix-Vector Multiplication

Yifan He, Hyung Joon Byun, Jimin Lee, Do-Yoon Lim, Houxiang Ji, Jungmin Choi, Hoshik Kim, Jae-sun Seo

Proceedings of the ACM/IEEE Design Automation Conference (DAC) 2026

PAGE: Processing-Using-DRAM Architecture-Circuits Co-Optimization for Efficient Acceleration of General Matrix-Vector Multiplication

Yifan He, Hyung Joon Byun, Jimin Lee, Do-Yoon Lim, Houxiang Ji, Jungmin Choi, Hoshik Kim, Jae-sun Seo

Proceedings of the ACM/IEEE Design Automation Conference (DAC) 2026

2025

Time Series Machine Learning Models for Precise SSD Access Latency Prediction

Bikrant Das Sharma, Houxiang Ji, Ipoom Jeong, Nam Sung Kim

IEEE Computer Architecture Letters (CAL) 2025

[Paper]

Time Series Machine Learning Models for Precise SSD Access Latency Prediction

Bikrant Das Sharma, Houxiang Ji, Ipoom Jeong, Nam Sung Kim

IEEE Computer Architecture Letters (CAL) 2025

[Paper]

Hardware-accelerated Kernel-Space Memory Compression Using Intel QAT

Qirong Xia*, Houxiang Ji*, Yang Zhou, Nam Sung Kim (* equal contribution)

IEEE Computer Architecture Letters (CAL) 2025 *equal contribution

[Paper]

Hardware-accelerated Kernel-Space Memory Compression Using Intel QAT

Qirong Xia*, Houxiang Ji*, Yang Zhou, Nam Sung Kim (* equal contribution)

IEEE Computer Architecture Letters (CAL) 2025 *equal contribution

[Paper]

Para-ksm: Parallelized Memory Deduplication with Data Streaming Accelerator

Houxiang Ji, Minho Kim, Seonmu Oh, Daehoon Kim, Nam Sung Kim

USENIX Annual Technical Conference (ATC) 2025 Artifacts Available Artifacts Evaluated - Functional Results Reproduced

[Paper]

Para-ksm: Parallelized Memory Deduplication with Data Streaming Accelerator

Houxiang Ji, Minho Kim, Seonmu Oh, Daehoon Kim, Nam Sung Kim

USENIX Annual Technical Conference (ATC) 2025 Artifacts Available Artifacts Evaluated - Functional Results Reproduced

[Paper]

Cooperative memory deduplication with Intel Data Streaming Accelerator

Houxiang Ji, Minho Kim, Seonmu Oh, Daehoon Kim, Nam Sung Kim

IEEE Computer Architecture Letters (CAL) 2025

[Paper]

Cooperative memory deduplication with Intel Data Streaming Accelerator

Houxiang Ji, Minho Kim, Seonmu Oh, Daehoon Kim, Nam Sung Kim

IEEE Computer Architecture Letters (CAL) 2025

[Paper]

Re-architecting End-host Networking with CXL: Coherence, Memory, and Offloading

Houxiang Ji, Yifan Yuan, Yang Zhou, Ipoom Jeong, Ren Wang, Saksham Agarwal, Nam Sung Kim

58th IEEE/ACM International Symposium on Microarchitecture (MICRO) 2025 Artifacts Evaluated - Functional Results Reproduced

[Paper]

Re-architecting End-host Networking with CXL: Coherence, Memory, and Offloading

Houxiang Ji, Yifan Yuan, Yang Zhou, Ipoom Jeong, Ren Wang, Saksham Agarwal, Nam Sung Kim

58th IEEE/ACM International Symposium on Microarchitecture (MICRO) 2025 Artifacts Evaluated - Functional Results Reproduced

[Paper]

X-PPR: Post Package Repair for CXL Memory

Chihun Song, Michael Jaemin Kim, Yan Sun, Houxiang Ji, Kyungsan Kim, Taekyeong Ko, Jung Ho Ahn, Nam Sung Kim

IEEE Computer Architecture Letters (CAL) 2025

[Paper]

X-PPR: Post Package Repair for CXL Memory

Chihun Song, Michael Jaemin Kim, Yan Sun, Houxiang Ji, Kyungsan Kim, Taekyeong Ko, Jung Ho Ahn, Nam Sung Kim

IEEE Computer Architecture Letters (CAL) 2025

[Paper]

2024

TAROT: A CXL SmartNIC-Based Defense Against Multi-bit Errors by Row-Hammer Attacks

Chihun Song, Michael Jaemin Kim, Tianchen Wang, Houxiang Ji, Jinghan Huang, Ipoom Jeong, Jaehyun Park, Hwayong Nam, Minbok Wi, Jung Ho Ahn, Nam Sung Kim

29th ACM International Conference on Architectural Support for Programming Languages and Operating Systems (ASPLOS) 2024 Artifacts Available Artifacts Evaluated - Functional Results Reproduced

[Paper]

TAROT: A CXL SmartNIC-Based Defense Against Multi-bit Errors by Row-Hammer Attacks

Chihun Song, Michael Jaemin Kim, Tianchen Wang, Houxiang Ji, Jinghan Huang, Ipoom Jeong, Jaehyun Park, Hwayong Nam, Minbok Wi, Jung Ho Ahn, Nam Sung Kim

29th ACM International Conference on Architectural Support for Programming Languages and Operating Systems (ASPLOS) 2024 Artifacts Available Artifacts Evaluated - Functional Results Reproduced

[Paper]

Demystifying a CXL Type-2 Device: A Heterogeneous Cooperative Computing Perspective

Houxiang Ji, Srikar Vanavasam, Yang Zhou, Qirong Xia, Jinghan Huang, Yifan Yuan, Ren Wang, Pekon Gupta, Bhushan Chitlur, Ipoom Jeong, Nam Sung Kim

57th IEEE/ACM International Symposium on Microarchitecture (MICRO) 2024 Artifacts Evaluated - Functional Results Reproduced

[Paper]

Demystifying a CXL Type-2 Device: A Heterogeneous Cooperative Computing Perspective

Houxiang Ji, Srikar Vanavasam, Yang Zhou, Qirong Xia, Jinghan Huang, Yifan Yuan, Ren Wang, Pekon Gupta, Bhushan Chitlur, Ipoom Jeong, Nam Sung Kim

57th IEEE/ACM International Symposium on Microarchitecture (MICRO) 2024 Artifacts Evaluated - Functional Results Reproduced

[Paper]

HAL: Hardware-Assisted Load Balancing for Energy-Efficient sNIC-Host Cooperative Computing

Jinghan Huang, Jiaqi Lou, Srikar Vanavasam, Xinhao Kong, Houxiang Ji, Ipoom Jeong, Danyang Zhuo, Eun Kyung Lee, Nam Sung Kim

51st Annual International Symposium on Computer Architecture (ISCA) 2024 Artifacts Available Artifacts Evaluated - Functional Results Reproduced

[Paper]

HAL: Hardware-Assisted Load Balancing for Energy-Efficient sNIC-Host Cooperative Computing

Jinghan Huang, Jiaqi Lou, Srikar Vanavasam, Xinhao Kong, Houxiang Ji, Ipoom Jeong, Danyang Zhuo, Eun Kyung Lee, Nam Sung Kim

51st Annual International Symposium on Computer Architecture (ISCA) 2024 Artifacts Available Artifacts Evaluated - Functional Results Reproduced

[Paper]

2023

Demystifying CXL Memory with Genuine CXL-Ready Systems and Devices

Yan Sun, Yifan Yuan, Zeduo Yu, Reese Kuper, Chihun Song, Jinghan Huang, Houxiang Ji, Siddharth Agarwal, Jiaqi Lou, Ipoom Jeong, Ren Wang, Jung Ho Ahn, Tianyin Xu, Nam Sung Kim

56th Annual IEEE/ACM International Symposium on Microarchitecture (MICRO) 2023 Artifacts Available Artifacts Evaluated - Functional Results Reproduced

[Paper] [PDF]

Demystifying CXL Memory with Genuine CXL-Ready Systems and Devices

Yan Sun, Yifan Yuan, Zeduo Yu, Reese Kuper, Chihun Song, Jinghan Huang, Houxiang Ji, Siddharth Agarwal, Jiaqi Lou, Ipoom Jeong, Ren Wang, Jung Ho Ahn, Tianyin Xu, Nam Sung Kim

56th Annual IEEE/ACM International Symposium on Microarchitecture (MICRO) 2023 Artifacts Available Artifacts Evaluated - Functional Results Reproduced

[Paper] [PDF]

STYX: Exploiting SmartNIC Capability to Reduce Datacenter Memory Tax

Houxiang Ji, Yan Sun, Mark Mansi, Yifan Yuan, Jinghan Huang, Reese Kuper, Michael M Swift, Nam Sung Kim

USENIX Annual Technical Conference (ATC) 2023

[Paper] [PDF]

STYX: Exploiting SmartNIC Capability to Reduce Datacenter Memory Tax

Houxiang Ji, Yan Sun, Mark Mansi, Yifan Yuan, Jinghan Huang, Reese Kuper, Michael M Swift, Nam Sung Kim

USENIX Annual Technical Conference (ATC) 2023

[Paper] [PDF]

2022

Pinned loads: taming speculative loads in secure processors

Zirui Neil Zhao, Houxiang Ji, Adam Morrison, Darko Marinov, Josep Torrellas

27th ACM International Conference on Architectural Support for Programming Languages and Operating Systems (ASPLOS) 2022 Artifacts Available Artifacts Evaluated - Functional Results Reproduced

[Paper] [PDF]

Pinned loads: taming speculative loads in secure processors

Zirui Neil Zhao, Houxiang Ji, Adam Morrison, Darko Marinov, Josep Torrellas

27th ACM International Conference on Architectural Support for Programming Languages and Operating Systems (ASPLOS) 2022 Artifacts Available Artifacts Evaluated - Functional Results Reproduced

[Paper] [PDF]

Comparative Reasoning for Knowledge Graph Fact Checking

Lihui Liu, Houxiang Ji, Jiejun Xu, Hanghang Tong

IEEE International Conference on Big Data (Big Data) 2022

[Paper] [PDF]

Comparative Reasoning for Knowledge Graph Fact Checking

Lihui Liu, Houxiang Ji, Jiejun Xu, Hanghang Tong

IEEE International Conference on Big Data (Big Data) 2022

[Paper] [PDF]

Graphite: optimizing graph neural networks on CPUs through cooperative software-hardware techniques

Zhangxiaowen Gong, Houxiang Ji, Yao Yao, Christopher W Fletcher, Christopher J Hughes, Josep Torrellas

49th Annual International Symposium on Computer Architecture (ISCA) 2022

[Paper] [PDF]

Graphite: optimizing graph neural networks on CPUs through cooperative software-hardware techniques

Zhangxiaowen Gong, Houxiang Ji, Yao Yao, Christopher W Fletcher, Christopher J Hughes, Josep Torrellas

49th Annual International Symposium on Computer Architecture (ISCA) 2022

[Paper] [PDF]

2021

Demystifying graph neural networks in recommender systems

Houxiang Ji

University of Illinois at Urbana-Champaign 2021

[Paper] [PDF]

Demystifying graph neural networks in recommender systems

Houxiang Ji

University of Illinois at Urbana-Champaign 2021

[Paper] [PDF]

2020

Speculation Invariance (InvarSpec): Faster Safe Execution Through Program Analysis

Zirui Neil Zhao, Houxiang Ji, Mengjia Yan, Jiyong Yu, Christopher W Fletcher, Adam Morrison, Darko Marinov, Josep Torrellas

53rd Annual IEEE/ACM International Symposium on Microarchitecture (MICRO) 2020

[Paper] [PDF]

Speculation Invariance (InvarSpec): Faster Safe Execution Through Program Analysis

Zirui Neil Zhao, Houxiang Ji, Mengjia Yan, Jiyong Yu, Christopher W Fletcher, Adam Morrison, Darko Marinov, Josep Torrellas

53rd Annual IEEE/ACM International Symposium on Microarchitecture (MICRO) 2020

[Paper] [PDF]

SparseTrain: Leveraging dynamic sparsity in software for training DNNs on general-purpose SIMD processors

Zhangxiaowen Gong, Houxiang Ji, Christopher W Fletcher, Christopher J Hughes, Josep Torrellas

ACM International Conference on Parallel Architectures and Compilation Techniques (PACT) 2020

[Paper] [PDF]

SparseTrain: Leveraging dynamic sparsity in software for training DNNs on general-purpose SIMD processors

Zhangxiaowen Gong, Houxiang Ji, Christopher W Fletcher, Christopher J Hughes, Josep Torrellas

ACM International Conference on Parallel Architectures and Compilation Techniques (PACT) 2020

[Paper] [PDF]

SAVE: Sparsity-Aware Vector Engine for Accelerating DNN Training and Inference on CPUs

Zhangxiaowen Gong, Houxiang Ji, Christopher W Fletcher, Christopher J Hughes, Sara Baghsorkhi, Josep Torrellas

53rd Annual IEEE/ACM International Symposium on Microarchitecture (MICRO) 2020

[Paper] [PDF]

SAVE: Sparsity-Aware Vector Engine for Accelerating DNN Training and Inference on CPUs

Zhangxiaowen Gong, Houxiang Ji, Christopher W Fletcher, Christopher J Hughes, Sara Baghsorkhi, Josep Torrellas

53rd Annual IEEE/ACM International Symposium on Microarchitecture (MICRO) 2020

[Paper] [PDF]

2019

HUBPA: high utilization bidirectional pipeline architecture for neuromorphic computing

Houxiang Ji, Li Jiang, Tianjian Li, Naifeng Jing, Jing Ke, Xiaoyao Liang

24th Asia and South Pacific Design Automation Conference (ASP-DAC) 2019

[Paper] [PDF]

HUBPA: high utilization bidirectional pipeline architecture for neuromorphic computing

Houxiang Ji, Li Jiang, Tianjian Li, Naifeng Jing, Jing Ke, Xiaoyao Liang

24th Asia and South Pacific Design Automation Conference (ASP-DAC) 2019

[Paper] [PDF]

2018

ReCom: An efficient resistive accelerator for compressed deep neural networks

Houxiang Ji, Linghao Song, Li Jiang, Hai Halen Li, Yiran Chen

Design, Automation & Test in Europe Conference & Exhibition (DATE) 2018

[Paper] [PDF]

ReCom: An efficient resistive accelerator for compressed deep neural networks

Houxiang Ji, Linghao Song, Li Jiang, Hai Halen Li, Yiran Chen

Design, Automation & Test in Europe Conference & Exhibition (DATE) 2018

[Paper] [PDF]

2017

Favorable block first: A comprehensive cache scheme to accelerate partial stripe recovery of triple disk failure tolerant arrays

Luyu Li, Houxiang Ji, Chentao Wu, Jie Li, Minyi Guo

46th International Conference on Parallel Processing (ICPP) 2017

[Paper] [PDF]

Favorable block first: A comprehensive cache scheme to accelerate partial stripe recovery of triple disk failure tolerant arrays

Luyu Li, Houxiang Ji, Chentao Wu, Jie Li, Minyi Guo

46th International Conference on Parallel Processing (ICPP) 2017

[Paper] [PDF]