Sujay Yadalam

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sujayyadalam AT cs.wisc.edu

I am a postdoc at UT Austin working on LDOS, advised by Aditya Akella. I completed my PhD in Computer Sciences from the University of Wisconsin-Madison. I was part of the SCAIL research group led by Prof. Michael Swift.

Prior to pursuing my graduate studies, I spent a year as a Research Assistant at the Indian Institute of Science (IISc) advised by Prof. Arkaprava Basu and Prof. Vinod Ganapathy.

I obtained my bachelor's degree in Electronics and Communication (ECE) from PES University.

News

Jun 2025: I will be presenting our work on Rowhammer defense in Microsoft's Cobalt 200 SoC at ISCA.
Apr 2025: I will be participating in the Sixth Chameleon User Meeting.
Jan 2026: I will be teaching CS395T Principles of Learned Systems at UT.
Oct 2025: I will be starting my postdoc at UT Austin with Aditya Akella on LDOS.
Sep 2025: Successfully defended my dissertation 'Architectures for heterogeneous memory and storage hierarchies in modern datacenters'.

Research interests

My research interests include computer architecture and systems broadly.
During my PhD, I have focused on designing system software and architectures for new and upcoming memory and storage technologies such as Non-Volatile Memory, low-latency SSDs and CXL technology.
I have a keen interest in hardware-software co-designs. I believe that they present significant performance and efficiency opportunities that are unavailable without crossing the boundary between the two layers.

Selected Publications

From Lab to Fleet: Building and Deploying a Practical Rowhammer Defense in Cloud SoCs
Stefan Saroiu, Sujay Yadalam, Alec Wolman, Will Remaklus, Daniel Berger, Isaac Hernandez Luna, Ishwar Agarwal, Jacob R. Lorch
ISCA 2026
[paper]
BypassD: Enabling fast userspace access to shared SSDs
Sujay Yadalam, Chloe Alverti, Vasileios Karakostas, Jayneel Gandhi, Michael Swift
ASPLOS 2024
[paper] [code]
ASAP: A Speculative Approach to Persistence
Sujay Yadalam, Nisarg Shah, Xiangyao Yu, Michael Swift
HPCA 2022
[paper] [code] [talk] [lightning talk]
SGXL: Security and Performance for Enclaves Using Large Pages
Sujay Yadalam, Vinod Ganapathy, Arkaprava Basu
TACO 2021
[paper] [code] [talk]

Workshop Papers

TierSizer: Counterfactual Reasoning for DRAM Sizing in Tiered Memory Systems
Sujay Yadalam, Saarth Deshpande, Divyanshu Saxena, Venkat Arun, Neeraja Yadwadkar, Aditya Akella
DIMES 2026
[paper]
Regional Policies for Memory Tiering Systems
Hayden Coffey, Sujay Yadalam, Ashwin Poduval, Vinay Banakar, Shivaram Venkataraman, Michael Swift
DIMES 2026
[paper]
To Tier, or Not? Evaluating Tiered Memory Systems on the Basis of Cost
Ashwin Poduval, Sujay Yadalam, Michael Swift
DIMES 2026
[paper]
OQueue: Observable Communication in Learning Directed Operating Systems
Aditya Tewari, Sujay Yadalam, Arthur Peters, Saurabh Agarwal, Aditya Akella, Michael Swift, and Christopher Rossbach
PACMI 2025
[paper]
Striking the Right Chord: Parameter Tuning in Memory Tiering
Sujay Yadalam*, Konstantinos Kanellis*, Shivaram Venkataraman, and Michael Swift
DIMES 2025
[paper] [slides]
How I learned to stop worrying and love learned OS policies
Divyanshu Saxena, Jiayi Chen, Sujay Yadalam, Yeonju Ro, Rohit Dwivedula, Eric Campbell, Aditya Akella, Christopher Rossbach, and Michael Swift
HotOS 2025
[paper] [slides]
Herding LLaMaS: Using LLMs as an OS Module
Aditya K Kamath*, Sujay Yadalam*
Wild and Crazy Ideas (WACI) @ ASPLOS 2023
[paper]

On ArXiV

ARMS: Adaptive and Robust Memory Tiering System
Sujay Yadalam*,Konstantinos Kanellis*, Shivaram Venkataraman, Michael Swift
[paper]

*Equal contribution

Awards and grants

Lawrence H. Landweber NCR fellowship (2024-25)
Distinguished Artifact award (BypassD @ ASPLOS'24)
ASPLOS'24 student travel grant
ASPLOS'22 student travel grant
Teaching award (2019 for CS642)

Service

ASPLOS 2027 Program Committee
OSDI 2024 Artifact Evaluation Committee
ATC 2024 Artifact Evaluation Committee
Eurosys 2024 Shadow PC
HPCA 2024 Artifact Evaluation Committee

Teaching

Instructor – CS395T - Principles of Learned Systems (UT Austin, Spring 2026)
Guest Lecture – CS739 - Distributed Systems (UW-Madison, Fall 2024)
Lecture title: Cluster Scheduling
Guest Lecture – CS537 - Introduction to Operating Systems (UW-Madison, Fall 2024)
Lecture title: Log structured Filesystems
Instructor – CS537 - Introduction to Operating Systems (UW-Madison, Summer 2024)
Guest Lecture – CS537 - Introduction to Operating Systems (UW-Madison, Spring 2024)
Lecture title: Concurrency bugs
Guest Lectures – CS537 - Introduction to Operating Systems (UW-Madison, Spring 2023)
Lecture titles: IO devices and disk schedulers, RAID
Guest Lecture – CS839 - Special Topics on persistence (UW-Madison, Fall 2021)
Lecture title: Architectures for NVM
Guest Lecture – CS642 - Introduction to Computer Security (UW-Madison, Fall 2019)
Lecture title: Hardware Security
Teaching Assistant – CS642 - Introduction to Computer Security (UW-Madison, Fall 2019)