Publications

2025

1. CAL

   Cooperative memory deduplication with Intel Data Streaming Accelerator

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

   IEEE Computer Architecture Letters, 2025

   Bib HTML

   @article{dsa-ksm,
     title = {Cooperative memory deduplication with Intel Data Streaming Accelerator},
     author = {Ji, Houxiang and Kim, Minho and Oh, Seonmu and Kim, Daehoon and Kim, Nam Sung},
     journal = {IEEE Computer Architecture Letters},
     year = {2025}
   }

2. CAL

   Hardware-accelerated Kernel-Space Memory Compression Using Intel QAT

   Houxiang Ji*, Qirong Xia* , Yang Zhou , and Nam Sung Kim

   IEEE Computer Architecture Letters, 2025

   *equal contribution

   Bib HTML

   @article{qat-compress,
     title = {Hardware-accelerated Kernel-Space Memory Compression Using Intel QAT},
     author = {Ji*, Houxiang and Xia*, Qirong and Zhou, Yang and Kim, Nam Sung},
     journal = {IEEE Computer Architecture Letters},
     note = {*equal contribution},
     year = {2025}
   }

3. CAL

   X-PPR: Post Package Repair for CXL Memory

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

   IEEE Computer Architecture Letters, 2025

   Bib HTML

   @article{cxl-fix,
     title = {X-PPR: Post Package Repair for CXL Memory},
     author = {Song, Chihun and Kim, Michael Jaemin and Sun, Yan and Ji, Houxiang and Kim, Kyungsan and Ko, Taekyeong and Ahn, Jung Ho and Kim, Nam Sung},
     journal = {IEEE Computer Architecture Letters},
     year = {2025}
   }

4. USENIX ATC

   Para-ksm: Parallelized Memory Deduplication with Data Streaming Accelerator

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

   In USENIX Annual Technical Conference , 2025

   to appear

   Bib HTML

   @inproceedings{Ji2025ksm,
     title = {Para-ksm: Parallelized Memory Deduplication with Data Streaming Accelerator},
     author = {Ji, Houxiang and Kim, Minho and Oh, Seonmu and Kim, Daehoon and Kim, Nam Sung},
     booktitle = {USENIX Annual Technical Conference},
     note = {to appear},
     year = {2025}
   }

5. CAL

   Time Series Machine Learning Models for Precise SSD Access Latency Prediction

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

   IEEE Computer Architecture Letters, 2025

   Bib HTML

   @article{ssd-predict,
     title = {Time Series Machine Learning Models for Precise SSD Access Latency Prediction},
     author = {Sharma, Bikrant Das and Ji, Houxiang and Jeong, Ipoom and Kim, Nam Sung},
     journal = {IEEE Computer Architecture Letters},
     year = {2025}
   }

6. MICRO

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

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

   In 2025 58th IEEE/ACM International Symposium on Microarchitecture (MICRO) , 2025

   to appear

   Bib

   @inproceedings{cxl-nic,
     title = {Re-architecting End-host Networking with CXL: Coherence, Memory, and Offloading},
     author = {Ji, Houxiang and Yuan, Yifan and Zhou, Yang and Jeong, Ipoom and Wang, Ren and Agarwal, Saksham and Kim, Nam Sung},
     booktitle = {2025 58th IEEE/ACM International Symposium on Microarchitecture (MICRO)},
     note = {to appear},
     year = {2025}
   }

2024

1. ISCA

   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 , and Nam Sung Kim

   In 2024 ACM/IEEE 51st Annual International Symposium on Computer Architecture (ISCA) , 2024

   Bib HTML

   @inproceedings{Huang2024HAL,
     title = {Hal: Hardware-assisted load balancing for energy-efficient snic-host cooperative computing},
     author = {Huang, Jinghan and Lou, Jiaqi and Vanavasam, Srikar and Kong, Xinhao and Ji, Houxiang and Jeong, Ipoom and Zhuo, Danyang and Lee, Eun Kyung and Kim, Nam Sung},
     booktitle = {2024 ACM/IEEE 51st Annual International Symposium on Computer Architecture (ISCA)},
     pages = {613--627},
     year = {2024},
     organization = {IEEE}
   }

2. ASPLOS

   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 , and Nam Sung Kim

   In Proceedings of the 29th ACM International Conference on Architectural Support for Programming Languages and Operating Systems, Volume 3 , 2024

   Bib HTML

   @inproceedings{Song2024TAROT,
     title = {TAROT: A CXL SmartNIC-Based Defense Against Multi-bit Errors by Row-Hammer Attacks},
     author = {Song, Chihun and Kim, Michael Jaemin and Wang, Tianchen and Ji, Houxiang and Huang, Jinghan and Jeong, Ipoom and Park, Jaehyun and Nam, Hwayong and Wi, Minbok and Ahn, Jung Ho and Kim, Nam Sung},
     booktitle = {Proceedings of the 29th ACM International Conference on Architectural Support for Programming Languages and Operating Systems, Volume 3},
     pages = {981--998},
     year = {2024}
   }

3. MICRO

   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 , and Nam Sung Kim

   In 2024 57th IEEE/ACM International Symposium on Microarchitecture (MICRO) , 2024

   Bib HTML

   @inproceedings{Ji2024CXL,
     title = {Demystifying a CXL Type-2 Device: A Heterogeneous Cooperative Computing Perspective},
     author = {Ji, Houxiang and Vanavasam, Srikar and Zhou, Yang and Xia, Qirong and Huang, Jinghan and Yuan, Yifan and Wang, Ren and Gupta, Pekon and Chitlur, Bhushan and Jeong, Ipoom and Kim, Nam Sung},
     booktitle = {2024 57th IEEE/ACM International Symposium on Microarchitecture (MICRO)},
     pages = {1504--1517},
     year = {2024}
   }

2023

1. USENIX ATC

   STYX: Exploiting SmartNIC Capability to Reduce Datacenter Memory Tax

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

   In USENIX Annual Technical Conference , 2023

   Bib HTML PDF

   @inproceedings{ji2023styx,
     title = {STYX: Exploiting SmartNIC Capability to Reduce Datacenter Memory Tax},
     author = {Ji, Houxiang and Sun, Yan and Mansi, Mark and Yuan, Yifan and Huang, Jinghan and Kuper, Reese and Swift, Michael M and Kim, Nam Sung},
     booktitle = {USENIX Annual Technical Conference},
     pages = {619--633},
     year = {2023}
   }

2. MICRO

   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 , and Nam Sung Kim

   In Proceedings of the 56th Annual IEEE/ACM International Symposium on Microarchitecture , 2023

   Bib HTML PDF

   @inproceedings{sun2023demystifying,
     title = {Demystifying cxl memory with genuine cxl-ready systems and devices},
     author = {Sun, Yan and Yuan, Yifan and Yu, Zeduo and Kuper, Reese and Song, Chihun and Huang, Jinghan and Ji, Houxiang and Agarwal, Siddharth and Lou, Jiaqi and Jeong, Ipoom and Wang, Ren and Ahn, Jung Ho and Xu, Tianyin and Kim, Nam Sung},
     booktitle = {Proceedings of the 56th Annual IEEE/ACM International Symposium on Microarchitecture},
     pages = {105--121},
     year = {2023}
   }

2022

1. ASPLOS

   Pinned loads: taming speculative loads in secure processors

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

   In Proceedings of the 27th ACM International Conference on Architectural Support for Programming Languages and Operating Systems , 2022

   Bib HTML PDF

   @inproceedings{zhao2022pinned,
     title = {Pinned loads: taming speculative loads in secure processors},
     author = {Zhao, Zirui Neil and Ji, Houxiang and Morrison, Adam and Marinov, Darko and Torrellas, Josep},
     booktitle = {Proceedings of the 27th ACM International Conference on Architectural Support for Programming Languages and Operating Systems},
     pages = {314--328},
     year = {2022}
   }

2. ISCA

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

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

   In Proceedings of the 49th Annual International Symposium on Computer Architecture , 2022

   Bib HTML PDF

   @inproceedings{gong2022graphite,
     title = {Graphite: optimizing graph neural networks on CPUs through cooperative software-hardware techniques},
     author = {Gong, Zhangxiaowen and Ji, Houxiang and Yao, Yao and Fletcher, Christopher W and Hughes, Christopher J and Torrellas, Josep},
     booktitle = {Proceedings of the 49th Annual International Symposium on Computer Architecture},
     pages = {916--931},
     year = {2022}
   }

3. BigData

   Comparative Reasoning for Knowledge Graph Fact Checking

   Lihui Liu , Houxiang Ji, Jiejun Xu , and Hanghang Tong

   In 2022 IEEE International Conference on Big Data (Big Data) , 2022

   Bib HTML PDF

   @inproceedings{liu2022comparative,
     title = {Comparative Reasoning for Knowledge Graph Fact Checking},
     author = {Liu, Lihui and Ji, Houxiang and Xu, Jiejun and Tong, Hanghang},
     booktitle = {2022 IEEE International Conference on Big Data (Big Data)},
     pages = {2309--2312},
     year = {2022},
     organization = {IEEE}
   }

2021

1. Master Thesis

   Demystifying graph neural networks in recommender systems

   Houxiang Ji

   University of Illinois at Urbana-Champaign , 2021

   Bib HTML PDF

   @phdthesis{ji2021demystifying,
     title = {Demystifying graph neural networks in recommender systems},
     author = {Ji, Houxiang},
     year = {2021},
     school = {University of Illinois at Urbana-Champaign}
   }

2020

1. MICRO

   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 , and Josep Torrellas

   In Proceedings of the 53rd Annual IEEE/ACM International Symposium on Microarchitecture (MICRO) , 2020

   Bib HTML PDF

   @inproceedings{zhao2020speculation,
     title = {Speculation Invariance (InvarSpec): Faster Safe Execution Through Program Analysis},
     author = {Zhao, Zirui Neil and Ji, Houxiang and Yan, Mengjia and Yu, Jiyong and Fletcher, Christopher W and Morrison, Adam and Marinov, Darko and Torrellas, Josep},
     booktitle = {Proceedings of the 53rd Annual IEEE/ACM International Symposium on Microarchitecture (MICRO)},
     year = {2020}
   }

2. MICRO

   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 , and Josep Torrellas

   In Proceedings of the 53rd Annual IEEE/ACM International Symposium on Microarchitecture (MICRO) , 2020

   Bib HTML PDF

   @inproceedings{gong2020save,
     title = {SAVE: Sparsity-Aware Vector Engine for Accelerating DNN Training and Inference on CPUs},
     author = {Gong, Zhangxiaowen and Ji, Houxiang and Fletcher, Christopher W and Hughes, Christopher J and Baghsorkhi, Sara and Torrellas, Josep},
     booktitle = {Proceedings of the 53rd Annual IEEE/ACM International Symposium on Microarchitecture (MICRO)},
     pages = {796--810},
     year = {2020},
     organization = {IEEE}
   }

3. PACT

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

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

   In Proceedings of the ACM International Conference on Parallel Architectures and Compilation Techniques , 2020

   Bib HTML PDF

   @inproceedings{gong2020sparsetrain,
     title = {SparseTrain: Leveraging dynamic sparsity in software for training DNNs on general-purpose SIMD processors},
     author = {Gong, Zhangxiaowen and Ji, Houxiang and Fletcher, Christopher W and Hughes, Christopher J and Torrellas, Josep},
     booktitle = {Proceedings of the ACM International Conference on Parallel Architectures and Compilation Techniques},
     pages = {279--292},
     year = {2020}
   }

2019

1. ASP-DAC

   HUBPA: high utilization bidirectional pipeline architecture for neuromorphic computing

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

   In Proceedings of the 24th Asia and South Pacific Design Automation Conference , 2019

   Bib HTML PDF

   @inproceedings{ji2019hubpa,
     title = {HUBPA: high utilization bidirectional pipeline architecture for neuromorphic computing},
     author = {Ji, Houxiang and Jiang, Li and Li, Tianjian and Jing, Naifeng and Ke, Jing and Liang, Xiaoyao},
     booktitle = {Proceedings of the 24th Asia and South Pacific Design Automation Conference},
     pages = {249--254},
     year = {2019}
   }

2018

1. DATE

   ReCom: An efficient resistive accelerator for compressed deep neural networks

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

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

   Bib HTML PDF

   @inproceedings{ji2018recom,
     title = {ReCom: An efficient resistive accelerator for compressed deep neural networks},
     author = {Ji, Houxiang and Song, Linghao and Jiang, Li and Li, Hai Halen and Chen, Yiran},
     booktitle = {2018 Design, Automation \& Test in Europe Conference \& Exhibition (DATE)},
     pages = {237--240},
     year = {2018},
     organization = {IEEE}
   }

2017

1. ICPP

   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 , and Minyi Guo

   In 2017 46th International Conference on Parallel Processing (ICPP) , 2017

   Bib HTML PDF

   @inproceedings{li2017favorable,
     title = {Favorable block first: A comprehensive cache scheme to accelerate partial stripe recovery of triple disk failure tolerant arrays},
     author = {Li, Luyu and Ji, Houxiang and Wu, Chentao and Li, Jie and Guo, Minyi},
     booktitle = {2017 46th International Conference on Parallel Processing (ICPP)},
     pages = {221--230},
     year = {2017},
     organization = {IEEE}
   }