James Pallister

Work

Silicon engineer at XTX Markets.

Previously, Silicon Verification Director at Graphcore, focusing on processor verification and silicon infrastructure.

PhD

I completed my PhD in Computer Science at the University of Bristol, looking at energy efficiency, compilers and how we can make our software and hardware use less energy.

PhD thesis: Exploring the fundamental differences between compiler optimisations for energy and for performance.

Publications

Papers (Google scholar)

• BEEBS: Open Benchmarks for Energy Measurements on Embedded Platforms
• Identifying Compiler Options to Minimize Energy Consumption for Embedded Platforms
• Optimizing the flash-RAM energy trade-off in deeply embedded systems
• Data dependent energy modelling: A worst case perspective
• Static analysis of energy consumption for LLVM IR programs

Patents

• Handling injected instructions in a processor
• Exception handling
• Exception register delay
• Message Signoffs

Talks

Talks / Research activities

• Over summer I worked for Embecosm on a research project: Identifying Compiler Options to Minimize Energy Consumption by Embedded Programs (paper). Visit Embecosm's blogpost for more details on the project.
• I also developed a set of benchmarks for testing energy consumpion in embedded devices (paper, blogpost, code).
• I gave a presentation to the NMI for their Every Joule Counts event. The presentation discussed how optimizations in the compiler affect a programs energy usage, talking about general trends seen.
• A talk on energy efficient compiler optmizations was given to OSHUG (Video, slides).
• I presented at the PEGPUM workshop at HiPEAC'13 in Berlin.
• The work on compiler optimizations and their impact on energy consumption was presented at GCC Cauldron 2013 (Video, slides).
• I talked about the Parallella project and parallel programming, at the "Preparing for Parallella" event, Bletchley Park (Video, Slides).
• I received a HiPEAC intership to work with Embecosm (Summer 2013), exploring superoptimization for energy consumption.
• I gave a talk at OSHcamp/Wuthering Bytes, on energy consumption and how to measure it (Video, Slides).
• The MAGEEC project ran an Energy Efficient Devroom at FOSDEM2014.
• I spoke at the Linux Collaboration Summit 2014 (description, slides).
• I won the NMI's young engineer of the year 2014 award!
• I spoke at FOSDEM 2015 - Superoptimization: How fast can your code go? (slides).

Contact

You can contact me at james @ this domain.