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Robert 'Bob' Caddy
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CUDA, OLCF User Meeting, and Rensselaer Summer School

Learning CUDA I completed the rest of the OLCF CUDA Training Series. Meetings and Summer School The OLCF User Meeting was this week and the Rensselaer Summer Program: Advanced Cyberinfrastructure ...

CUDA Training

Learning CUDA I completed five more sections of the OLCF CUDA Training Series, which leaves me with just one more that I’ll finish off next week. Testing I contacted several other Frontier CAAR te...

Learning Cuda and GPU Resident MPI

GPU MPI I started on getting GPU resident MPI working on the Pitt CRC cluster. So far it compiles but doesn’t run. I’m working with the CRC and other group members to get that fixed. I got access t...

Cholla Prep

MHD Debugging I spent some more time bug hunting and found that the instability only shows up when a number is not exactly expressible in binary. After discussin this with Evan they pointed out tha...

Sign Errors and Debugging

MHD Debugging My implementation of constrained transport was complicated and hard to maintain so I refactored the main loop. Primarily I just unrolled the innermost loop over the x,y,z directions. ...

Numerical Noise and Confusion

MHD Debugging I spent this week comparing my code to Athena++. Throughout that process I fixed a sign error in the CT equation, turns out they should all be plusses with no minuses. I also fixed a...

Astro Project 2

Astronomical Techniques I was working a lot on the project this week. I wrote the final report, made a lot of different figures, prepared my presentation on it, and presented it. Not super exciting...

Astro Project

Astronomical Techniques This week in class we discussed maximum likelihood, regression, and information criteria. I was working a lot on the project this week. I implemented dimensionality reducti...

Astro Project and Debugging

Astronomical Techniques This week in class we discussed non-parametric tests like the U test. I was working a lot on the project this week. I spent about a day reading up on MCMC techniques and ti...

Astro Project and ML

Astronomical Techniques In class over the last two weeks we’ve discussed basics of machine learning and non-parametric tests. We also started our class projects in earnest. My part so far has been...