Jeongseob Ahn (안정섭)

I am currently an associate professor in the School of Electrical Engineering and am also affiliated with the Department of Communications Engineering at Korea University. I am interested in building high-performance computer systems with cross-layer optimization. Before joining Korea University, I spent six and a half years at Ajou University. Prior to joining Ajou, I contributed to building a large-scale data analytics system with specialized hardware (called RAPID) at Oracle Labs.

Research Group: Computer Systems Laboratory (연구실 학생 모집 안내, 참고자료)

Research Interests

• Computer Systems and Architecture, AI Systems, Cloud/Datacenter Computing
  
  • Useful stuffs

Teaching

• KECE210: Digital Systems and Design Laboratory (Fall 2024)
• COMM106: Basic Programming (Fall 2024)
• COMM206: Logic Circuit Design (Fall 2024)
• ECE521: Parallel Processing (Spring 2024)
• COMM205: Basic Logic Circuit (Spring 2024)
• SCE212: Computer Organization and Architecture (Spring 2023, Fall 2022, Spring 2021, Fall 2020, Spring 2020, Fall 2019, Spring 2019, Fall 2018, Fall 2017)
• SCE213: Operating Systems (Spring 2022, Spring 2018)
• SCE394: IT Intensive Programming [Topic: Parallel Computing & Linux Internals] (Fall 2021)
• CSE561: Advanced Computer Architecture (Spring 2021, Fall 2019, Fall 2017)
• CSE812: Special Topics in Systems and Applications [Topic: Systems for ML (and ML for Systems)] (Fall 2020)
• CSE515: Advanced Operating Systems (Fall 2018)
• ICT331: Computer Organization (Spring 2018)

Experiences and Education

• Associate Professor, Electrical Engineering, Korea University, Mar. 2024 ~Present
• Assistant/Associate Professor, Software and Computer Engineering, Ajou University, Sep. 2017 ~ Feb. 2024
• Research Excellence Award, 2023
• Teaching Excellence Award, 2020
• Researcher, Oracle Labs, Feb. 2016 ~ Jul. 2017
• Research Fellow, Computer Science and Engineering , University of Michigan, Feb. 2015 ~ Jan. 2016
• Ph.D. in Computer Science, KAIST, Feb. 2015
  
• Outstanding Dissertation Award in Computer Science, 2015
• Outstanding Teaching Assistant Award in Computer Science, 2012
• M.S. in Computer Science, KAIST, Feb. 2011
• B.S. in Computer Science and Engineering, Dongguk University, Feb. 2009
• Undergraduate Research Assistant, Samsung Electronics Software Membership, Jan. 2005 ~ Jan. 2009

Students

• PhD: Soonjae Hwang, Seungsu Baek, Jinwoo Jeong, Jonghyeon Kim
• MS: Youngjoon Cheon, Woohyung Choi
• Intern: Yumin Lee, Gyeonggeun Jung, Jongho Baik
• Researcher: Seunggon Jeon
• Alumni

Selected Publications [ Google Scholar | DBLP ]

• [ICCD '24] Interference-Aware DNN Serving on Heterogeneous Processors in Edge Systems [ Paper ]
  Yeonjae Kim, Igjae Kim, Kwanghoon Choi, Jeongseob Ahn, Jongse Park, and Jaehyuk Huh
  IEEE International Conference on Computer Design (ICCD), November 2024
  

• [ATC '23] EnvPipe: Performance-preserving DNN Training Framework for Saving Energy [ Paper | Video | Slides | Code ]
  Sangjin Choi, Inhoe Koo, Jeongseob Ahn, Myeongjae Jeon, and Youngjin Kwon
  USENIX Annual Technical Conference (ATC), July 2023
  

• [EuroSys '23] Fast and Efficient Model Serving Using Multi-GPUs with Direct-Host-Access [ Paper | Slides | Code ]
  Jinwoo Jeong, Seungsu Baek, and Jeongseob Ahn
  ACM European Conference on Computer Systems (EuroSys), May 2023
  Gilles Muller Best Artifact Award

• [ATC '22] Memory Harvesting in Multi-GPU Systems with Hierarchical Unified Virtual Memory [ Paper | Video | Slides | Code ]
  Sangjin Choi¹, Taeksoo Kim¹, Jinwoo Jeong, Rachata Ausavarungnirun, Myeongjae Jeon, Youngjin Kwon, and Jeongseob Ahn
  USENIX Annual Technical Conference (ATC), July 2022
  (¹ Co-first authors)

• [APSys '21] Rethinking Remote Memory Placement on Large-Memory Systems with Path Diversity [ Paper | Slides ]
  Wonkyo Choe, Sang-Hoon Kim, and Jeongseob Ahn
  ACM SIGOPS Asia-Pacific Workshop on Systems (APSys), August 2021

• [ATC '21] Exploring the Design Space of Page Management for Multi-Tiered Memory Systems [ Paper | Video | Slides | Code ]
  Jonghyeon Kim, Wonkyo Choe, and Jeongseob Ahn
  USENIX Annual Technical Conference (ATC), July 2021

• [ATC '21] Zico: Efficient GPU Memory Sharing for Concurrent DNN Training [ Paper | Video | Slides ]
  Gangmuk Lim, Jeongseob Ahn, Wencong Xiao, Youngjin Kwon, and Myeongjae Jeon
  USENIX Annual Technical Conference (ATC), July 2021

• [CAL '20] A Study of Memory Placement on Hardware-assisted Tiered Memory Systems [ Paper | Video ]
  Wonkyo Choe, Jonghyeon Kim, and Jeongseob Ahn
  IEEE Computer Architecture Letters (CAL), 19(2), July-December 2020
  

• [TPDS '20] Reconciling Time Slice Conflicts of Virtual Machines with Dual Time Slice for Clouds [ Paper ]
  Taeklim Kim, Chang Hyun Park, Jaehyuk Huh, and Jeongseob Ahn
  IEEE Transactions on Parallel and Distributed Systems (TPDS), 31(10), October 2020
  

• [TACO '19] Caliper: Interference Estimator for Multi-tenant Environments Sharing Architectural Resources [ Paper ]
  Ram Srivatsa Kannan, Michael Laurenzano, Jeongseob Ahn, Jason Mars, and Lingjia Tang
  ACM Transactions on Architecture and Code Optimization (TACO), 16(3), May 2019
  

• [EuroSys '19] GrandSLAm: Guaranteeing SLAs for Jobs in Microservices Execution Frameworks [ Paper | Video | Slides ]
  Ram Srivatsa Kannan, Lavanya Subramanian, Ashwin Raju, Jeongseob Ahn, Jason Mars, and Lingjia Tang
  ACM European Conference on Computer Systems (EuroSys), March 2019

• [EuroSys '18] Accelerating Critical OS Services in Virtualized Systems with Flexible Micro-sliced Cores [ Paper | Video | Slides | Code ]
  Jeongseob Ahn, Chang Hyun Park, Taekyung Heo, and Jaehyuk Huh
  ACM European Conference on Computer Systems (EuroSys), April 2018

• [TC '15] Fast Two-level Address Translation for Virtualized Systems [ Paper ]
  Jeongseob Ahn, Seongwook Jin, and Jaehyuk Huh
  IEEE Transactions on Computers (TC), 64(10), December 2015

• [TC '15] H-SVM: Hardware-assisted Secure Virtual Machines under a Vulnerable Hypervisor [ Paper ]
  Seongwook Jin, Jeongseob Ahn, Jinho Seol, Sanghoon Cha, Jaehyuk Huh, and Seungryoul Maeng
  IEEE Transactions on Computers (TC), 64(10), October 2015

• [MICRO '14] Micro-sliced Virtual Processors to Hide the Effect of Discontinuous CPU Availability for Consolidated Systems [ Paper | Slides ]
  Jeongseob Ahn, Chang Hyun Park, and Jaehyuk Huh
  IEEE/ACM International Symposium on Microarchitecture (MICRO), December 2014

• [TC '12] Subspace Snooping: Exploiting Temporal Sharing Stability for Snoop Reduction [ Paper ]
  Jeongseob Ahn, Daehoon Kim, Jaehong Kim, and Jaehyuk Huh
  IEEE Transactions on Computers (TC), 61(11), November 2012

• [ISCA '12] Revisiting Hardware-Assisted Page Walks for Virtualized Systems [ Paper | Slides ]
  Jeongseob Ahn, Seongwook Jin, and Jaehyuk Huh
  ACM/IEEE International Symposium on Computer Architecture (ISCA), June 2012

• [HotCloud '12] Dynamic Virtual Machine Scheduling in Clouds for Architectural Shared Resources [ Paper | Slides | Code ]
  Jeongseob Ahn, Changdae Kim, Jaeung Han, Young-ri Choi, and Jaehyuk Huh
  USENIX Workshop on Hot Topics in Cloud Computing (HotCloud), June 2012

• [MICRO '11] Architectural Support for Secure Virtualization under a Vulnerable Hypervisor [ Paper ]
  Seongwook Jin, Jeongseob Ahn, Sanghoon Cha, and Jaehyuk Huh
  IEEE/ACM International Symposium on Microarchitecture (MICRO), December 2011

• [PACT '10] Subspace Snooping: Filtering Snoops with Operating System Support [ Paper ]
  Daehoon Kim, Jeongseob Ahn, Jaehong Kim, and Jaehyuk Huh
  ACM/IEEE/IFIP International Conference on Parallel Architectures and Compilation Techniques (PACT), September 2010

Academic Services

• Program Committee
  • ASPLOS: 2025
  • ICS: 2024
  • SYSTOR: 2024
  • HPCA: 2024
  • ISPASS: 2021

Contact Information

• E-mail: jsahn @ csl.korea.ac.kr
• Office: New Engineering Building #518
• Address: Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, South Korea 02841
• Tel: +82-2-3290-3229