Hi! I am a graduate student in computer science at The Ohio State University. Before coming to OSU I earned my BS in Computer Engineering from UMass, Amherst and was a member of the Architecture and Language Implementation Lab. I am also a boardmember of the Open Hardware Foundation, an officer in OSU's Open Source Club, and the graduate representative on the faculty search committee.

My advisor is Professor Sadayappan. Broadly speaking, my research area is computer systems with a focus on high performance computer architecture, software tools, and runtime support for large-scale parallel applications.

Teaching:

Autumn 2008

CSE 360: Introduction to Computer Architecture

Selected Work:

High Performance Computing

Global Trees: A Framework for Linked Data Structures on Distributed Memory Parallel Systems
D. Brian Larkins, James Dinan, Sriram Krishnamoorthy, Atanas Rountev , P. Sadayappan
Proc. 20th Intl. Conference on Supercomputing. Austin, TX, Nov. 15-21, 2008.

Scioto: A Framework for Global-View Task Parallelism [pdf]
James Dinan, Sriram Krishnamoorthy, D. Brian Larkins, Jarek Nieplocha, P. Sadayappan
Proc. of 37th Intl. Conference on Parallel Processing. Portland, OR, Sept. 8-12, 2008.

Dynamic Load Balancing of Unbalanced Computations Using Message Passing [pdf] [slides]
James Dinan, Stephen Olivier, Jan Prins, Gerald Sabin, P Sadayappan and Chau-Wen Tseng.
Proc. of 6th Intl. Workshop on Performance Modeling, Evaluation, and Optimization of Parallel and Distributed Systems (PMEO-PDS 2007). Long Beach, CA, March 26-30, 2007.

UTS: An Unbalanced Tree Search Benchmark [pdf]
Stephen Olivier, Jun Huan, Jinze Liu, Jan Prins, James Dinan, P Sadayappan and Chau-Wen Tseng.
Proceedings of 19th Intl. Workshop on Languages and Compilers for Parallel Computing (LCPC 2006).

Reconfigurable Computing

Hardware/Software Integration for FPGA-based All-Pairs Shortest-Paths [ps | pdf]
Uday Bondhugula, A. Devulapalli, James Dinan, J. Fernando, Pete Wyckoff, E. Stahlberg, and P. Sadayappan. Proceedings of the IEEE Symposium on Field-Programmable Custom Computing Machines (FCCM '06), Apr 2006, Napa Valley, California.

Hardware/Software Codesign for All-Pairs Shortest-Paths on a Reconfigurable Supercomputer [ps | pdf]
Uday Bondhugula, A. Devulapalli, James Dinan, J. Fernando, Pete Wyckoff, E. Stahlberg, and P. Sadayappan. OSU-CISRC-1/06-TR13.

Dynamic SimpleScalar and DSSWattch

DSSWattch: Power Estimation in Dynamic SimpleScalar [pdf]
James Dinan, Eliot Moss. Technical Report; UMass ALI Lab. Amherst, MA.

Dynamic SimpleScalar is an extended version of the SimpleScalar architectural simulator that supports a greater amount of the simulated operating system's functionality, allowing the Jikes RVM to run inside of the simulator. DSS also extends support for PowerPC targets to PPC/AIX, PPC/Linux, and PPC/OS-X. In addition to working on these new features of the simulator, I adapted Wattch power modelling extensions to DSS's updated framework and PPC microarchitecture.

Downloads:

RAPC Tool (v0.3)

RAPC is a little BASH script to help people connect to the rapc machines. You'll also need to have html2text installed on your machine - most popular linux distros should have a package for it. Download RAPC. Screen Shot.

MPI Hostlist Writer (v0.3)

This is a handy little Perl script that makes writing host lists for running MPI jobs a snap. Download the Hostlist Writer. Screen Shot.