In this work, https://doi.org/10.1063/5.0334617, we worked together with computational material/chemistry researchers within a nationally funded project (MExMeMo) and optimized their two applications. Also, we coupled both apps together to collaboratively simulate with different methods, using […]

Our simulation of a universal quantum computer with 50 qubits got published: https://www.sciencedirect.com/science/article/pii/S0167739X26002268. We used 4096 #jupiter nodes for it, mostly for the memory – because of the Grace-Hopper superchipiness we could also use CPU RAM well. The algorithm […]

Moved my Home Assistant installation finally from a Raspberry Pi 4B to a small Intel box (J5005 CPU), since 32 bit ARM is not supported anymore. The main parts were already entirely using Docker, and after also moving other host-side remnants (SSH keys) or replacing them with HA-confined […]

Why do so few fellow TeXnicians use \autoref{}? It’s so good! #latex #Hyperref

Not sure I even have German followers here, but: Zusammen mit @bne86 habe in einem Podcast über #jupiter berichtet: https://codeforthought.buzzsprout.com/1326658/episodes/18342781-de-jupiter-hpc-fur-die-wissenschaft-mit-a-herten-und-b-von-st-vieth (Follow-Up-Fragen beantworte ich gerne, z.B […]

Finally, #JUPITER crossed the 1 ExaFLOP/s threshold today. The list is lying to you, though, it's not like it's 1000 PFLOP/s exactly, it's 1000.184 PFLOP/s; the rest got lost to rounding. The 184 TFLOP/s are pretty much exactly the same as the previous #JSC […] [Original post on mastodon.social]

Has anyone already determined the average coffee density at #sc25? Need to normalize to ICS* to align my coffee intake. #hpc** *: International Coffee Standard **: The C is for Coffee, of course

There a nonsensical performance metrics in computing – and then there’s “Gigawatts of Compute”. #hpc

My #sc25 is quite busy again this year. When I'm not contributing (see below), visiting vendors, or staffing our @fzj_jsc booth, I try to see as many sessions as possible (why are there so many interesting talks? And all at the same time!). Contributions: - Sunday: Multi-GPU Tutorial - Monday […]

Spotify → Apple Music

The good thing about generating tables and data in papers from machine-readable raw data is you can flexibly generate new stuff with different styles. The bad thing about generating tables and data from raw data is … options! So many! (And complexity… revisiting the scripts for a paper revision […]

How about writing up something cool about testing #hpc systems? Or some exciting accelerator analysis? We’ve just extended the deadline for submission to the #waccpd workshop at #sc25. And #hpctests is also still open. Both close on Friday, EOD! Links: - WACCPD CfP […]

JUPITER is in the TOP500! We didn’t manage to beat the exascale barrier just yet, but did pretty good in the timeframe! Happy to chat about #jupiter in the dedicated booth later! #hpc #exa_jupiter

Next week is #isc25 in Hamburg. When I'm not going to vendor meetings, staff #jsc/#JUPITER/project booths, or attend the technical program, I’ll have these contributions: - Wed: NHR booth; Sofa Talk about GPU benchmarking - Thu: EuroHPC booth; Talk about JUPITER - Fri: Future of Benchmarks […]

Migrated my #zfs pool to a new machine and then replaced the drives with new ones, autoexpanding to the drives‘ new sizes. Worked like a charm. Magic!

Personal achievement: came back the nearly 700 km route from Easter vacation with only 2 charging stops. #ev (I’m still pretty surprised how bad the car‘s route/distance planning is. The first stop was to be reached with 1% SoC left when we put the stop in; when we reached it, SoC was 10%.)

Finally deleted all my tweets over at the other network. 💪

We've written a review article about "Energy-aware operation of HPC systems in Germany": https://doi.org/10.3389/fhpcp.2025.1520207 #hpc