Research Interests

• Deep Learning Accelerator

• Hardware-Software Co-design for Efficient ML

• Computer Architecture

• Parallelism

Employment

• Research Scientist, School of Computing, KAIST, Mar. 2023 - Present

  • Advisor: Jaehyuk Huh 

Education

• Master of Science, School of Computing, KAIST, Feb. 2023

  • Thesis: Improving the Utilization of NPU On-chip Memory with Computation Rearrangement for DNN Training

  • Advisor: Jaehyuk Huh 

• Bachelor of Science, School of Computing, KAIST, Feb. 2021

  • Minor Degree in Mathematical Sciences

Publications

• Seonjin Na, Jungwoo Kim, Sunho Lee, and Jaehyuk Huh, “Supporting Secure Multi-GPU Computing with Dynamic and Batched Metadata Management”, the 30th IEEE International Symposium on High-Performance Computer Architecture (HPCA), March 2024 [paper][slide]

• Jungwoo Kim, Seonjin Na, Sanghyeon Lee, Sunho Lee, and Jaehyuk Huh, “Improving Data Reuse in NPU On-chip Memory with Interleaved Gradient Order for DNN Training”, the 56th IEEE/ACM International Symposium on Microarchitecture (MICRO), October 2023 [paper][slide]

• Soojin Hwang*, Sunho Lee*, Jungwoo Kim, Hongbeen Kim, and Jaehyuk Huh, "mNPUsim: Evaluating the Effect of Sharing Resources with Multi-Core NPUs", 2023 IEEE International Symposium on Workload Characterization (IISWC), October 2023 (*: equal contribution) [paper][slide][github]

• Sunho Lee, Seonjin Na, Jungwoo Kim, Jongse Park, and Jaehyuk Huh, "Tunable Memory Protection for Secure Neural Processing Units", the 40th IEEE International Conference on Computer Design (ICCD), October, 2022 [paper][slide]

• Sunho Lee, Jungwoo Kim, Seonjin Na, Jongse Park, and Jaehyuk Huh, "TNPU: Supporting Trusted Execution with Tree-less Integrity Protection for Neural Processing Unit", the 28th IEEE International Symposium on High-Performance Computer Architecture (HPCA), April, 2022 [paper][slide]

Research Experiences

• CASYS Lab KAIST, Daejeon, Republic of Korea, Jan 2021 - present (Advisor : Jaehyuk Huh)

  • Accelerator Performance

    • Operation Scheduling for High-performance DNN training in NPU (MICRO 2023)

    • mNPUsim: Open-sourced Cycle-accurate Multi-core NPU Simulator (IISWC 2023)

  • Accelerator Hardware-based Security

    • Efficient Communication Mechanism for Secure Multi-GPU Architecture (HPCA 2024)

    • Trusted Execution Environment Architecture for NPU (HPCA 2022)

    • Optimized Hardware Memory Protection for secure NPU (ICCD 2022)

• CP Lab KAIST, Daejeon, Republic of Korea, Jun 2020 - Jan 2021 (Advisor : Jeehoon Kang) 

  • Reimplementation of xv6 (operating system written in C) using Rust : rv6

Patents

• Jaehyuk Huh, Jungwoo Kim, Seonjin Na, Sanghyeon Lee, and Sunho Lee, "Improving the Utilization of NPU On-chip Memory with Computation Rearrangement for DNN Training", Korean Patent (Pending)

• Jaehyuk Huh, Seonjin Na, Jungwoo Kim, and Sunho Lee, "Dynamic One-time Pad Table Management for Secure Multi-GPU Communication", Korean Patent (Pending)

Awards & Scholarships

• National Full Graduate Scholarship, KAIST, 2021 - 2023

• Third Place, Best Paper Awards, KAIST-Samsung Electronics Industry-Academic Exchange, 2022

  • Title: TNPU: Supporting Trusted Execution with Tree-less Integrity Protection for Neural Processing Unit

• Excellent Teaching Assistant Award, School of Computing, KAIST, 2022

• Cum Laude, College of Engineering, KAIST, 2021 

• Dean's List, College of Engineering, KAIST, Fall 2018 & Spring 2019

• National Science & Technology Scholarship, Korea Student Aid Foundation, 2019

• LINE Scholarship, LINE corporation, 2019

• National Full Undergraduate Scholarship, Korea Student Aid Foundation, 2014 - 2020

Teaching Experiences

• School of Computing, KAIST

  • Teaching Assistant for Computer Organization (CS311) : Spring 2022

  • Teaching Assistant for System Programming (CS230) : Fall 2021

  • Teaching Assistant for Introduction to Programming (CS101) : Fall 2020, Spring 2021

• School of Freshman, KAIST

  • Tutor for Calculus II (MAS102) : Fall 2015, Spring 2016

• Global Leadership Center, KAIST

  • Instructor for Humanity/Leadership III<Your Story: Make Your Own Lecture> (HSS062): Fall 2015, Spring 2016

Work Experiences

• Date Engineer, Netmarble, Jun 2019 - Aug 2019

  • Real-time log-based OLAP service

• Military Service, Icheon, Korea, Sep 2016 - Jun 2018

  • Honorary Discharge as a Sergeant, ROK Army Aviation Command CERT