Bonus: also the world’s first standard protocol across all languages

This is a wonderful community, so if you (1) are a part of it or (2) generally have interest in supporting an HPC-related community, please consider donating!

I had the pleasure of being mentored by Ian while in graduate school. Queen’s is incredibly lucky to have him!

Day 12 of #AdventOfCode was done twice (cudf and OpenACC)! github.com/willkill07/A... github.com/willkill07/A... This was a very fun year with the shorter duration and increased challenge of a new GPU programming model per day.

Day 11 of #AdventOfCode was done in C++ with std::execution! github.com/willkill07/A... Neither the cleanest nor the shortest, but I had to get this programming model in for the event :(

Day 10 of #AdventOfCode was done in CUDA C++! github.com/willkill07/A... Parallel BFS for Part 1. Wrote my own solver for Part 2. Runs in less than 1.3ms 🚀

Day 9 of #AdventOfCode was done in C++ with OpenMP Offload! github.com/willkill07/A... Part 1 and Part 2 are similar structurally, with Part 2 effectively checking for bounding box intersection between the candidate and each edge. Runs in less than 130 microseconds.

Day 8 of #AdventOfCode was done in CUDA with CCCL! github.com/willkill07/A... Uses CCCL to precompute and sort all pairs of nodes by distance and then uses a disjoint set on the GPU (single threaded) to compute the results for part 1 and part 2 separately.

Day 7 of #AdventOfCode was done in ISO C++23 with C++ Standard Parallelism! github.com/willkill07/A...

Day 6 of #AdventOfCode was done in numba-CUDA! A single kernel was used for both parts. github.com/willkill07/A...

Day 5 of #AdventOfCode was done in NVIDIA’s Python CCCL library! github.com/willkill07/A... A tiny bit of cupy was used, but almost all of the algorithms were dispatched with cccl

Day 4 of #AdventOfCode was so much fun that I did it twice! OpenACC and cudf OpenACC: github.com/willkill07/A... cudf: github.com/willkill07/A... Each are relatively idiomatic. I almost wrote a custom cupy stencil kernel for cudf, but I felt like that was cheating.

Day 3 of #AdventOfCode done using Warp! github.com/willkill07/A... The kernel itself yields an array of integer values in the correct order. numpy then reconstructs the number. The GPU kernel generated runs on a single block where each thread gets its own line of input. Runs in <100us on device.

Day 2 of #AdventOfCode done using cupy! github.com/willkill07/A... I tried to avoid nasty repeated division and modulus on the GPU and aimed to do a lot of array-based programming. With kernel fusion this would be much faster but it still works! 10 more days means 10 GPU programming models left!

Day 1 done using CuTe! github.com/willkill07/A... I realize this is kind-of cheating in the sense that it only runs on one GPU thread, but I do take advantage of CuTe Tensors and compile-time JIT via Constexpr! I do wish that there was an easy way to return a simple value from a CuTe kernel.

My #AdventOfCode challenge to myself is to ensure all solutions run on my GPU in 12 different programming models officially supported by NVIDIA. I’ve only programmed in half of them 😅 README is live: github.com/willkill07/A...

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Day 2 of #SC25 Workshops and Tutorials continue to be in full swing today! Student Programming Events (Room 263) - Resume Workshop 9:00-9:45AM - Portfolio Workshop 10:00-10:45AM - Navigating Education Systems Internationally Panel 11AM-12PM - 1:1 Career Coaching (preregistration required) 1PM-4PM

#HPC #SC24. Current registration is 15,446. Peak Scinet bandwidth is 14.72 TBPS. 560 exhibitors.

Day 1 of #sc25 Tutorials and Workshops kick off this morning! Some Student Programming events are also running today: - HPC/AI Crash Course - 8:30AM until 3:30PM in Room 263. Please note this required preregistration - Career Panel - 3:45PM until 4:45PM in Room 263

Wonderful view of the St Louis skyline coming in on my flight. Eagerly anticipating this year’s #sc25 #hpcignites

Frontiere ran on Frontier. This alone is worth recognition. The TLDR is that a really big HACC job ran on Frontier with a bunch of new algorithmic optimizations. Neato.

This December, I'll be posting an article & video each day until Christmas in the Advent of Compiler Optimisations! #AoCO2025 Each day we'll explore a fun optimisation in C or C++; some low-level, x86 or ARM-specific, some high-level. Hope you'll join me! YT: youtube.com/mattgodbolt Blog: xania.org

P.S.: If you'd like to support our open-source projects including our jobs board, Slack/Discord/Mastodon, community map, weekly online chat, podcasts, community syndicated blog, discussion area, surveys, please click on one of the links below: github.com/sponsors/hpc... or github.com/sponsors/hpc...

Dear all #HPC and #AI/#Quantum/#RCD and #Supercomputing folks and friends: It's just 3 years since we launched the survey.hpc.social/results/hpc-... that led to the creation of the multi-faceted set of resources of the hpc.social website and tools. This is just to say THANK YOU and see you at #SC25!

#SC25 will open with a 2-day #HPC Crash Course based on OLCF training at ORNL. The course is free with Student Program registration, but spots are limited. sc25.supercomputing.org/2025/08/igni...

I’m increasingly convinced by an argument I saw recently that LLMs are effectively power tools (apologies for not remembering the cite!): - Incredibly useful for experts in a field that are able to correct for their errors - Really dangerous for layfolk who don’t know what they don’t know

Statement from the largest economics association about the BLS firing As context: AEA approximately never makes such public statements This is a big deal

💥Spack v1.0 is out!💥 This is a huge milestone. We reworked the core to add compiler dependencies, and we're introducing a stable package API. 🚀1.0 also adds concurrent builds, better includes, and much more -- read it all in the release notes! github.com/spack/spack/...

Why are they called "relaxed" atomics, but whenever I have to use them, I become very stressed?

The President's Budget request as released yesterday will gut scientific research. Why should you care? 1) Science is fundamentally a jobs program. Many 100,000s are employed to do science and work for you, the US taxpayer.

Announcing the 44 Accepted #SC25 Workshops o Workshops with Proceedings o Symposium-style Workshops sc25.supercomputing.org/2025/05/anno... #HPC

@tartanllama.xyz Look at what came in the post yesterday!

repost to upset a C++ programmer: int main() { int a = 0xE + 1; // compiles int b = 0xE+1; // doesn't }

At the end of the day, everything is a data movement problem.

Don't make me point to the sign www.hpcwire.com/2024/10/17/i...

Damn, I didn't expect C++ Wrapped to go so hard this year

Btw the below is why I find mixed precision #HPC so interesting. There’s potentially *huge* performance upsides, but if you get it wrong, it’s *all* wrong.

Having skimmed through the preorder PDF, I can confidently state that Sy’s work here is awesome. They do a great job of breaking down everything you need to know about debuggers. And it’s refreshing to read about targeted use cases for all sorts of APIs at the system and kernel level.

Missing those #HPC hallway conversations from #SC24 or other conferences and events? Wish you could continue them on a longer-term basis? Don't worry, we've got you covered! The hpc-hallway.github.io/The-Hallway/ is an open, informal weekly online videocall of people you can join weekly for free!

In terms of absolute numbers, #Twitter is ahead in terms of engagement However if we normalize based on # of followers, engagement per follower is significantly higher in #BlueSky We need more #HPC centers/organizations, media and vendors to open BlueSky accounts

TIL the #SC24 logo has a hidden peach visible (look at the negative space of the logo in the center!)

Over 8.4 Tbps of WAN is provided to the SCinet #sc24 network this year!

Full room at #P3HPC workshop at #SC24 this morning. Julien Bigot is gave a great featured talk on CEA’s CExA project’s adoption of @hpsf.bsky.social and #Kokkos and what led them to using it as their preferred application ecosystem.

Coolest hint of #sc24 swag so far? I think so! As a LEGO nerd and HPC nerd this definitely needs more hype.

En route to Atlanta for #sc24 — I’d smile more but I’m just too tired right now, and coffee only does so much! Looking forward to serving on the Infrastructure Security team and chairing a Doctoral Showcase session. Let’s catch up!