Jason Ansel

I am a Ph.D. student in CSAIL at MIT. I am working with Saman Amarasinghe in the Commit Group.

The best way to contact me is by emailing: jansel@csail.mit.edu

Research Projects

Conference Publications

Portable Performance on Heterogeneous Architectures.
Phitchaya Mangpo Phothilimthana, Jason Ansel, Jonathan Ragan-Kelley, Saman Amarasinghe.
The International Conference on Architectural Support for Programming Languages and Operating Systems (ASPLOS'13).
Houston, TX. March, 2013. Bibtex.
SiblingRivalry: Online Autotuning Through Local Competitions.
Jason Ansel, Maciej Pacula, Yee Lok Wong, Cy Chan, Marek Olszewski, Una-May O'Reilly, Saman Amarasinghe.
International Conference on Compilers Architecture and Synthesis for Embedded Systems (CASES'12).
Tampere, Finland. Oct, 2012. Bibtex.
Hyperparameter Tuning in Bandit-Based Adaptive Operator Selection.
Maciej Pacula, Jason Ansel, Saman Amarasinghe, Una-May O'Reilly.
European Conference on the Applications of Evolutionary Computation (EvoApps'12).
Málaga, Spain. April, 2012. Bibtex.
Aikido: Accelerating Shared Data Dynamic Analyses.
Marek Olszewski, Qin Zhao, David Koh, Jason Ansel, Saman Amarasinghe.
The International Conference on Architectural Support for Programming Languages and Operating Systems (ASPLOS'11).
London, UK. March, 2012. Bibtex.
An Efficient Evolutionary Algorithm for Solving Bottom Up Problems.
Jason Ansel, Maciej Pacula, Saman Amarasinghe, Una-May O'Reilly.
Annual Conference on Genetic and Evolutionary Computation (GECCO'11).
Dublin, Ireland. July, 2011. Slides. Bibtex.
Language-Independent Sandboxing of Just-In-Time Compilation and Self-Modifying Code.
Jason Ansel, Petr Marchenko, Ulfar Erlingsson, Elijah Taylor, Brad Chen, Derek Schuff, David Sehr, Cliff Biffle, Bennet Yee.
ACM SIGPLAN Conference on Programming Language Design and Implementation (PLDI'11).
San Jose, CA. Jun, 2011. Slides. Bibtex.
Language and Compiler Support for Auto-Tuning Variable-Accuracy Algorithms.
Jason Ansel, Yee Lok Won, Cy Chan, Marek Olszewski, Alan Edelman, Saman Amarasinghe.
International Symposium on Code Generation and Optimization (CGO'11).
Chamonix, France. April, 2011. Slides. Bibtex.
Autotuning Multigrid with PetaBricks.
Cy Chan, Jason Ansel, Yee Lok Wong, Saman Amarasinghe, Alan Edelman.
ACM/IEEE Conference on Supercomputing (SC'09).
Portland, OR. Nov, 2009. Bibtex.
PetaBricks: A Language and Compiler for Algorithmic Choice.
Jason Ansel, Cy Chan, Yee Lok Wong, Marek Olszewski, Qin Zhao, Alan Edelman, Saman Amarasinghe.
ACM SIGPLAN Conference on Programming Language Design and Implementation (PLDI'09).
Dublin, Ireland. Jun, 2009. Slides. Bibtex.
DMTCP: Transparent Checkpointing for Cluster Computations and the Desktop.
Jason Ansel, Kapil Arya, Gene Cooperman.
IEEE International Parallel and Distributed Processing Symposium (IPDPS'09).
Rome, Italy. May, 2009. Slides. Bibtex.
Kendo: Efficient Deterministic Multithreading in Software.
Marek Olszewski, Jason Ansel, Saman Amarasinghe.
The International Conference on Architectural Support for Programming Languages and Operating Systems (ASPLOS'09).
Washington, DC. Mar, 2009. Bibtex.
Transparent User-Level Checkpointing for the Native POSIX Thread Library for Linux.
Michael Rieker, Jason Ansel, Gene Cooperman.
The International Conference on Parallel and Distributed Processing Techniques and Applications (PDPTA'06).
Las Vegas, NV. Jun, 2006. Bibtex.
Transparent Adaptive Library-Based Checkpointing for Master-Worker Style Parallelism.
Gene Cooperman, Jason Ansel, Xiaoqin Ma.
IEEE International Symposium on Cluster Computing and the Grid (CCGrid'06).
Singapore. May, 2006. Bibtex.

Invited Papers / Talks

Autotuning Aspects of PetaBricks. (Invited Talk)
Jason Ansel.
Workshop on Statistical and Machine Learning Approaches to Architecture and Compilation (SMART'11).
Chamonix, France. May, 2010. Slides. Bibtex.
PetaBricks: Building adaptable and more efficient programs for the multi-core era.
Jason Ansel and Cy Chan.
Crossroads, The ACM Magazine for Students (XRDS).
Volume 17, Issue 1. Sep, 2010. Bibtex.

Workshop Papers / Extended Abstracts

Scaling Deterministic Multithreading.
Marek Olszewski, Jason Ansel, and Saman Amarasinghe.
Workshop on Determinism and Correctness in Parallel Programming (WoDet'11).
Newport Beach, CA. April, 2011. Bibtex.
Adaptive Checkpointing for Master-Worker Style Parallelism. (Extended Abstract)
Gene Cooperman, Jason Ansel, and Xiaoqin Ma.
IEEE Computer Society International Conference on Cluster Computing (Cluster'05).
Boston, MA. Sep, 2005. Bibtex.

Technical Reports / Theses

Language and Compiler Support for Auto-Tuning Variable-Accuracy Algorithms.
Jason Ansel, Yee Lok Won, Cy Chan, Marek Olszewski, Alan Edelman, and Saman Amarasinghe.
Technical Report MIT-CSAIL-TR-2010-032.
Massachusetts Institute of Technology. Jul, 2010. Bibtex.
PetaBricks: A Language and Compiler for Algorithmic Choice.
Jason Ansel.
S.M. Thesis, Massachusetts Institute of Technology.
Sep, 2009. Bibtex.

Work History

I have worked for many companies either as an intern, employee, or contractor. I am currently working for Locu. In the past I have worked for Google, Reveal Imaging Technologies, AMD/ATI, and Bluefin Robotics. For a complete history see my CV (currently only available via email).

Hobbies

Coffee Roasting

For a long time I have enjoyed espresso. Since mid 2009, I have been roasting my own coffee from green coffee beans. I started out using the oven, but now I use two different coffee roasting machines. I mostly use a Behmor 1600, which has a large batch size and is very consistent. I occasionally use a FreshRoast Plus 8, for more experimental roasting. I used to like very dark espresso roasts, but since I started roasting coffee myself I have transitioned to liking lighter full city or vienna roasts. These lighter roasts allow the flavors of the different types of coffee beans to stand out more.

Currently I am exploring some South American coffee varieties. Now I am roasting two varieties of coffee from the Elida Estate in Panama and another from the state of Sul de Minas in Brazil. Previously I have tried roasting beans from Sumatra, Hawaii, Yemen, and a number of espresso blends.

Cooking

I love spicy food. I have been teaching myself how to cook. I started by trying to reproduce spicy dishes I like. Recently I have been baking breads and making my own pasta from scratch. I want to learn to cook some Thai dishes next.

Occasionally I take pictures to give myself ideas for the next time.

Powerlifting

In my free time I do powerlifting. My current powerlifting total is 1100 lbs.

Others

I previously enjoyed skiing, sailing, horseback riding, climbing, and developing/playing computer games. However, I have not had time to do any of these things recently.