2023.04.13 Meeting Notes

Agenda

• Individual/group updates
• review non-WIP PRs

Individual/group updates

LR

• report has been submitted
• thinking about multigrid (next to bicgstab)
  • potentially different from Athena++ impl (solve at the coarse lvl exactly)
  • want to keep infrastructure flexible (e.g., wrt smoothing/prolong/restrict ops)

BR

• working on fixes to particle infrastructure
• found bug in defrag, which is already part of the particle output
• found scaling issue if particles are distributed unevenly across mesh, LB should fix it
• there's an early draft of MC transport in Phoebus

BP

• KHARMA will be part of Argonne Hackathon
• working on PEP1 interface draft
• will poke JD on variable PR and then take over

PM

• reviewed integrator PR

JS

• having issue with interconnect on Polaris
• having trouble running on Perlmutter
• fighting with bitwise reproducibility for face centered fields

FG

• reviewing uid PR
• needs a slide on KHARMA and Phoebus for APS
• had an interview with OLCF media to cover APS session
• is interested in looking closer at particles (and their performance)
• will review particle output PR

BW

• fighting with Ascent issues (likely bug on Ascent side as it only shows up on device runs)
• interested in implementing tracer particles in AthenaPK

PG

• CUG and SC23 paper submitted
• found bug in pgen
• working on yt frontend. There might be ways to include GR and multiple materials, but nothing camera ready yet