I am a PhD student in Computer Science at Northeastern University. I am a member of the High Performance Computing Lab and my advisor is Gene Cooperman. I am interested in Operating Systems, Reversible Debuggers, Checkpointing, Deterministic Replay and other related areas.
Research Projects
FReD
- FReD (Fast Reversible Debugger) is a new system that uses temporal search automatically over the process lifetime to rapidly travel back in time to an earlier point of interest.
- Two important components of FReD are deterministic replay and checkpointing. Deterministic replay is a prerequisite for such a system. Checkpoints are used to speed up the search.
- FReD can reversibly debug multithreaded applications.
- URDB (Universal Reversible DeBugger) is a reversible debugger, based on multiple checkpoints, history of debugging commands, restart and re-execute. Decomposing the history of debugging commands is a requirement for such an approach.
- URDB adds reversibility to the debuggers: gdb; MATLAB; python (pdb); and perl (perl -d).
- URDB can reversibly debug only singlethreaded applications.
- DMTCP (Distributed MultiThreaded CheckPointing) is a transparent user-level distributed checkpointing package, that requires no kernel patches and no kernel modules.
Large Space Enumeration Problems Using Parallel Disks as Primary Storage
- Worked on developing a new distributed approach to direct condensation that uses disk as primary storage.
- The disk-based approach produces condensation matrices for the sporadic simple group Janko Group J4.
Papers
- A.M. Visan, K. Arya, G. Cooperman, T. Denniston. URDB: Universal Reversible DeBugger. PLOS, 2011. [ PDF]
- A.M. Visan, K. Arya, T. Denniston, G. Cooperman. Automated Debugging using Temporal Search with FReD. Paper in preparation.
Internships
Google, Geo-SRE, 2010
Bloomberg LP, Mortgages CMO Group, 2009
NetApp, WAFL File System Group, 2008
Teaching
I have been an
Instructor of Record for:
- Computer Science and its Applications, Spring 2010
- Computer Science and its Applications, Summer 2007
- Discrete Structures, Spring 2007
I have been a
Teaching Assistant for:
- Computer Science and its Applications, Fall 2009
- Network Security, Prof. G. Noubir, Spring 2009
- Wireless Networks, Prof. R. Sundaram, Fall 2008
- Computer Science and its Applications, Prof. M. Lipton, Spring 2008
- Computer Science and its Applications, Prof. P. Wang, Fall 2007
- Discrete Structures, Prof. J. Aslam and Prof. H. Fell, Fall 2006
