jrenaud90
commented
9 months ago Hi, @hannorein! Thank you for your submission. We would love to have you speak at an upcoming exoVAST talk. We currently have 1 spot available on either November 1st and December 6th (both at 11am US Eastern). If you are available for one/both of those dates please let me know in a reply here.
A note about the format: Your talk will be one of two 20 minute talks with time for questions afterwards. One of the goals of exoVAST is to create a new series of tutorial/informational videos for tools hosted on EMAC that may not already have one. We plan to upload these talks to YouTube and link them to your resource on EMAC so that potential users can get an introduction. I know 20 minutes is not enough time to give a comprehensive tutorial on your resource, but if possible: we are recommending ~half the talk dedicated to the science / history (likely similar to a talk you have given in the past) and the other ~half a small demonstration of your resource. This could just be how to run one small aspect of it, how to install it, anything that you think may, 1) help other scientists be able to use your tool and/or 2) get them excited to check it out. I know live demos can be fraught with problems, so you are welcome to simply have images on a slide show walking through a demo rather than actually running any code.
I know this is a non-traditional format so I would be happy to talk to you more about it! If you are game, then I just need the information found at the end of this message (and which dates you could speak on).
Thank you, Joe
~exoVAST Speaker Form Speaker Name and Affiliation: Speaker Pronouns: Short Speaker Bio: Talk Title: You are okay with the talk being recorded and uploaded to the VAST/EMAC YouTube: ~
hannorein
zingale
Name of software library or topic
WHFast512 (part of REBOUND)
URL to software repository
https://github.com/hannorein/rebound
Name of person who will give the talk
Hanno Rein (University of Toronto)
Brief abstract
N-body simulation with a small number of particles are difficult to parallelizable using GPUs or CPU clusters because communication overhead often dominate. As a result long term integrations can take weeks or even months to run on modern CPUs. In this talk, I will present the new symplectic N-body integrator WHFast512 which is using Single Instruction Multiple Data (SIMD) parallelism and 512-bit Advanced Vector Extensions (AVX512). We were able to speed up integrations of planetary systems by up to 4.7x compared to the non-vectorized version of WHFast. WHFast512 can integrate the Solar System with 8 planets for 5 billion years in a single day. To our knowledge, this makes WHFast512 by far the fastest direct N-body integrator for systems of this kind. In this talk I will not only present WHFast512 but also give a short introduction on how to write programs using these AVX512 instructions so that you can optimize your own code as well.