The below information is related to my work as a computer scientist, and as such somewhat dated. Please contact me with any questions.

Projects and Research

• SiCortex, the future (now past) of high efficiency Linux-based technical compute clusters.
• Perfmon2, next generation support in the Linux kernel for advanced performance analysis.
• PerfMiner, an automated hardware performance collection system based on PAPI.
• OMII-Europe, Open Middleware Infrastructure Institute, Performance and Benchmarking (JRA4) architect.
• PAPI: Inventor and Technical Lead of this R & D 100 Award winning project.
• PapiEx/Monitor/LLCBench: Head developer and Project Lead.
• Department of Energy's SciDAC Performance Engineering Research Institute Team Member.

Interests

• Next-generation performance analysis for terascale systems.
• Benchmarking, analysis and optimization of parallel numerical applications and their platforms.
• End-to-end system software design for large parallel systems.
• High performance, low-latency communication substrates for technical compute clusters.
• Operating system performance: 100% resource availability, copy avoidance schemes, intelligent resource placement and noise reduction on machines of scale.
• Development of performance analysis hardware on next generation microprocessors.
• Dynamic, adaptive, continuous, feedback-directed instrumentation systems.

Publications & White Papers
Presentations
Tutorials on Optimization of Scientific Applications

Software

• PapiEx: PAPI Execute: a command line PAPI performance analysis tool, no source code required!
• Monitor: A library for trapping/catching library, process and thread initialization/creation/destruction.
• PAPI: Performance Application Programming Interface.
• Work on the Linux kernel, MPICH and MPICH2 to improve NUMA performance on the AMD Opteron Microprocessor.
• Some scripts to restore a badly corrupted EXT3 directory/partition/hard disk.
• PROCMON: A tool for tracking memory usage of a process. (papiex can do this too, but this is a bit more portable.)
• IOtrack: A library for trapping/catching/tracing file and socket I/O for performance analysis.
• LLCBench: Low-Level Architecture Characterization Benchmarks, CacheBench, MPBench and BLASBench.
• DynaProf: a dynamic, interactive, performance analysis and instrumentation tool, no source code required!
• PVMAM: A portable and robust Active Messaging Implementation for PVM. (1997)
• FCH: A highly optimized and highly portable, hash table implementation. (1996)
• VHPM: The original hardware performance counter library, tool and kernel patch for the IBM Power 2 series. (1996)
• PVM: The precursor to MPI. (1994-1997)
• PVMDBF: PVM Distributed Battle Framework, a discrete event simulator for time-step driven battle simulation. (1996)
• PVMTEST: PVM test suite and Tcl/Tk GUI. (1995)

Upcoming and Recent Professional Activities

How to get in touch