Seminar, LANS Seminar, Argonne National Laboratory, Chicago, IL, USA
This talk was based on my doctoral thesis work on checkpointing, lossy compression and automatic differentiation. Delivered this talk remotely from London.
Conference talk, Doctoral Showcase, Supercomputing 2019, Denver, Colorado, United States of America
This talk was part of Supercomputing’s doctoral showcase. Here I presented the entirety of my thesis work, which consisted of checkpointing, lossy compression and automatic differentiation.
Conference talk, European workshop on automatic differentiation, London, United Kingdom
This talk focussed on automatic differentiation of stencil loops. A key feature of stencil loops is the gather operation that is converted into a scatter by conventional AD. This scatter can not be easily parallelised. This talk discussed a compiler-level transform that changes that scatter operation back into a gather operation that is easy to parallelise.
Workshops, University of Sao Paulo, Sao Paulo, Brazil
This was a three-day workshop on Software technologies around seismic imaging. I did two hour-long presentations around my work in lossy compression and automatic differentiation.
Conference talk, International Parallel and Distributed Processing Symposium, Rio de Janeiro, Brazil
Here I presented the use of revolve-based checkpointing to enable training of neural networks on tiny devices. The use case presented was that of in-situ retraining of student-teacher pairs to address the viewpoint problem in computer vision.
Workshop, SENAI CIMATEC, Salvador, Brazil
I conducted a full day workshop on Full-Waveform Inversion, demonstrating the mathematics and code required to invert some basic acoustic examples.
Workshop, University of Sao Paulo, Sao Paulo, Brazil
Here I conducted a three-day workshop teaching the attendees the basics of solving finite-difference problems using Devito.
Conference talk, European workshop on Automatic Differentiation, Jena, Germany
In this talk I presented the work I had started while at Argonne. This was initial work about lossy compression of checkpoints.
Conference talk, International Symposium for Mathematical Programming, Bordeaux, France
In this talk, I first presented pyRevolve - a high-level library for managing checkpointing for adjoint-based optimisation problems.
Invited talk, INRIA Bordeaux, Bordeaux, France
I gave this talk while visiting INRIA Bordeaux as part of a collaboration. This talk was based on my work on combining lossy compression and checkpointing. Here I presented the performance model that can predict whether lossy compression can accelerate adjoint computations.
Conference talk, European Association of Geoscientists and Engineers, Workshop on High-Performance Computing for Upstream, Athens, Greece
This talk was at a smallish (30 people) workshop targeted at academia and the O&G Industry in the Middle East. I presented Devito - the core idea, some API examples, and some performance numbers.
Conference talk, High performance computing in Oil and Gas at Rice University, Houston, Texas, United States of America
Audience of ~200 people who were senior academics and executives from the Oil and Gas Industry. This talk was a sales pitch for the general idea of Devito - that end users should not be writing low-level code and should instead focus on high-level algorithmic questions.
Conference talk, Society of Industrial and Applied Mathematicians, Computational Science and Engineering Conference 2017, Atlanta, Georgia, United States of America
This was at the SIAM-CSE conference in Atlanta. My talk was part of a workshop called MS84 Domain-Specific Abstractions for Full-Waveform Inversion. Here I presented a high-level overview of Devito’s API.
Conference talk, WolfHPC, Supercomputing 2016, Salt Lake City, Utah, United States of America
This was my first academic talk and the first time Devito was being presented to the world. The talk was about the first version of Devito - how it was built, and some performance results.