I am a fourth-year Ph.D. student at the University of Utah, working with Prof. Ryan Stutsman. I also collaborate with Gerd Zellweger from VMware Research. I am interested in low-latency in-memory storage systems and operating systems.

Before that, I worked with Prof. Sorav Bansal as a Research Associate at IIT Delhi. I also worked as a Software Engineer at Dell EMC for a few years after receiving my Master's degree from IIT Bombay.

[Resume - July, 2021]
[Google Scholar]

50 Central Campus Dr #3163
Salt Lake City, Utah- 84112


  • [ May 2021 ] Started internship at VMware Research, hosted by Irina Calciu and Gerd Zellweger.
  • [ March 2021 ] NrOS paper is accepted to appear at OSDI '21.
  • [ May 2020 ] Started internship at VMware Research Group, hosted by Gerd Zellweger.
  • [ May 2020 ] Sandstorm paper is accepted to appear at HotCloud '20.
  • [ Apr 2020 ] ASFP paper is accepted to appear at ATC '20.
  • [ Aug 2018 ] Joined the School of Computing, University of Utah as a PhD student.
  • [ Apr 2018 ] Received an offer to join the University of Massachusetts, Amherst as a graduate student.
  • [ Jan 2018 ] Received an offer to join the University of Utah as a graduate student.
  • [ Sep 2017 ] Attended APSys 2017 and presented our work.
  • [ July 2017 ] My first paper got accepted in APSys 2017.


  • NrOS: Effective Replication and Sharing in an Operating System
    Ankit Bhardwaj, Chinmay Kulkarni, Reto Achermann, Irina Calciu, Sanidhya Kashyap, Ryan Stutsman, Amy Tai, and Gerd Zellweger
    15th USENIX Symposium on Operating Systems Design and Implementation (OSDI '21)
    [ Paper ] [ Talk ] [ Code ] [ Webpage ]

  • Adaptive Placement for In-memory Storage Functions
    Ankit Bhardwaj, Chinmay Kulkarni, and Ryan Stutsman
    2020 USENIX Annual Technical Conference (ATC '20)
    [ Paper ] [ Slides ] [ Talk ] [ Code ]

  • On the Impact of Isolation Costs on Locality-aware Cloud Scheduling
    Ankit Bhardwaj, Meghana Gupta, and Ryan Stutsman
    12th USENIX Workshop on Hot Topics in Cloud Computing (HotCloud '20)
    [ Paper ] [ Slides ] [ Talk ]

  • A Preliminary Performance Model for Optimizing Software Packet Processing Pipelines
    Ankit Bhardwaj, Atul Shree, Bhargav Reddy V, and Sorav Bansal
    8th ACM SIGOPS Asia-Pacific Workshop on Systems (APSys '17)
    [ Paper ] [ Poster ] [ Slides ] [ Talk ]


  • COP: Compiler Optimizations to Reduce Memory Stalls for Network Pipelines Written in P4
    Shailja Pandey, Ankit Bhardwaj, Anmol Panda and Sorav Bansal
    Poster in 15th USENIX Symposium on Networked Systems Design and Implementation (NSDI '18 Poster)
    [ Abstract ] [ Poster ]


I am broadly interested in Distributed Systems, Operating Systems, and Cloud Computing.

  • Bespin - is an new operating system written from scratch in Rust with the goal to explore the kernel replication on each NUMA node and sharing the replica among cores such that it can scale for a multi-socket machine. It uses operation logging to synchonize the replicated kernel across sockets.
  • Splinter - is a multi-tenant in-memory key-value store that allows pushing storage functions at runtime. Traditional techniques to provide isolation among tenants are too costly and can't be used for a μs-scale system. So, our group is looking for novel ways to solve the problem.
  • Bacus - At IIT Delhi, my research focus was on compiler-based optimizations for software-based packet processing. We worked on optimizing the compilers so that DSLs(like P4) can be used more effectively. I was a part of Vertecs Paper Reading group; details can be found here.
  • vLAB - At IIT Bombay, I worked on vLab: Managing and Provisioning VMs for Labs, where the aim was to run a large number of virtual machines on commodity hardware. I designed and implemented the system from scratch, and also analyzed the impact of various parameters on VM boot time when images were stored on distributed object store setup over a cluster of commodity machines.

Teaching Assistantship

  • Fall 2020, Distributed Systems, University of Utah
  • Spring 2020, Operating System, University of Utah
  • Spring 2015, Operating System Lab, IIT Bombay
  • Fall 2014, Implementation Techniques for Relational Database Systems, IIT Bombay
  • Fall 2013 and Spring 2014, Computer Programming and Utilization, IIT Bombay