Linear Wave Debugging I finished linear wave tests, they needed a bit of polishing. With some help I discovered that the perturbations I was seeing in the Alfven wave tests weren’t an issue since ...

Linear Waves I need to add MHD linear wave tests and initial conditions at some point so I decided to do it this week to help with debugging. I already added support for generalized linear wave in...

Summary This is a repository of some MHD test problems. Most of them are taken from Athena++ and Gardiner & Stone 2008 Linear Waves I’ll be using the wave tests from Athena++ which are detai...

Debugging The hydro tests weren’t working anymore in MHD so I set about working on fixing them. I started with the simplier sound wave test. After some digging, the new Arm debugger was very helpf...

Occupancy With the help of some folks at NVIDIA I finally figured out the issue I was running into with our reductions. It turns out that the reduction kernels required more registers in debug mod...

NVIDIA Compute Sanitizer PR #196 I got the NVIDIA Compute Sanitizer working with Cholla this week to help diagnose any issues in my code or Cholla in general. It found some problems that I think ...

First Paper The paper from my master’s was published this week in Publications of the Astronomical Society of the Pacific, Volume 134, Number 1039: Optical Time-series Photometry of the Symbiotic ...

Arm DDT With help some nice folks at Arm I figured out how to display device arrays in host code, see this post for details. In preparation for presenting on Arm Forge next week I submitted two P...

Debugging GPU Codes with Arm DDT See the Arm Forge User Guide for all the info, this is just a place for some notes and tips Use -g -O0 to compile host code and -g -G -cudart shared to compile...

Arm Forge I spent the week getting Arm Forge setup and working with Cholla. The documentation is pretty easy to follow and it was reasonably easy to setup.