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Dr. Moritz LehmannBattle of the giants: Nvidia <a href="https://mast.hpc.social/tags/Blackwell" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Blackwell</a> B200 takes the lead in FluidX3D CFD performance<a href="https://mast.hpc.social/tags/Nvidia" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Nvidia</a> <a href="https://mast.hpc.social/tags/B200" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#B200</a> just launched, and I'm one of the first people to benchmark 8x B200 via Shadeform, in a WhiteFiber server with 2x <a href="https://mast.hpc.social/tags/Intel" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Intel</a> <a href="https://mast.hpc.social/tags/Xeon6" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Xeon6</a> 6960P 72-core CPUs. 🖖😋8x Nvidia B200 go head-to-head with 8x <a href="https://mast.hpc.social/tags/AMD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#AMD</a> <a href="https://mast.hpc.social/tags/MI300X" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#MI300X</a> in the <a href="https://mast.hpc.social/tags/FluidX3D" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#FluidX3D</a> <a href="https://mast.hpc.social/tags/CFD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#CFD</a> benchmark, winning overall (with FP16S storage) at 219300 MLUPs/s (~17TB/s combined VRAM bandwidth), but losing in FP32 & FP16C storage. 8x MI300X achieve 204924 MLUPs/s.

Chapel Programming LanguageWith more than 100k lines of code, the CFD solver CHAMPS is the biggest Chapel codebase we know of. To learn more about how Chapel helps aerodynamics research, check out this recent talk by Engin Kayraklioglu, Eric Laurendeau and Karim Zayni presented at the NASA Ames Research Center.<a href="https://www.nas.nasa.gov/pubs/ams/2025/02-20-25.html" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://www.nas.nasa.gov/pubs/ams/2025/02-20-25.html</a><a href="https://mastodon.social/tags/ChapelLang" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ChapelLang</a> <a href="https://mastodon.social/tags/CFD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#CFD</a>

Dr. Moritz LehmannMy <a href="https://mast.hpc.social/tags/IWOCL" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#IWOCL</a> 2025 Keynote presentation is online! 🖖🧐 Scaling up <a href="https://mast.hpc.social/tags/FluidX3D" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#FluidX3D</a> <a href="https://mast.hpc.social/tags/CFD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#CFD</a> beyond 100 Billion cells on a single computer - a story about the true cross-compatibility of <a href="https://mast.hpc.social/tags/OpenCL" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#OpenCL</a> <a href="https://www.youtube.com/watch?v=Sb3ibfoOi0c&list=PLA-vfTt7YHI2HEFrpzPhhQ8PhiztKhHU8&index=1" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://www.youtube.com/watch?v=Sb3ibfoOi0c&list=PLA-vfTt7YHI2HEFrpzPhhQ8PhiztKhHU8&index=1</a> Slides: <a href="https://www.iwocl.org/wp-content/uploads/iwocl-2025-moritz-lehmann-keynote.pdf" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://www.iwocl.org/wp-content/uploads/iwocl-2025-moritz-lehmann-keynote.pdf</a>

M Schommer<a href="https://mastodon.online/@larsmb" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@larsmb</a> Gilead Vibes intensivieren.Während in einem Paralleluniversum der Plan der <a href="https://hostux.social/tags/FDP" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#FDP</a> die Ampel rechtzeitig zu sprengen fehlgeschlagen ist, seit November ein AfD-Verbot angestoßen und §218 abgeschafft wurden, und die Republik im BT-Wahlkampf am Beispiel <a href="https://hostux.social/tags/MAGAstan" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#MAGAstan</a> täglich klarer sieht was eine Stimme für die <a href="https://hostux.social/tags/CfD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#CfD</a> bedeutet.<a href="https://mstdn.social/@dadamsda" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@dadamsda</a>

concretedogAnother hardcore Friday night.. learning the mesh refinement aspects of the CfdOF workbench in <a href="https://fosstodon.org/@FreeCAD" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@FreeCAD</a> basically enables more accurate analysis where you need it. <a href="https://mastodon.social/tags/FreeCAD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#FreeCAD</a> <a href="https://mastodon.social/tags/FreeCADFriday" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#FreeCADFriday</a> <a href="https://mastodon.social/tags/CFD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#CFD</a>

FreeCADIt's <a href="https://fosstodon.org/tags/FreeCADFriday" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#FreeCADFriday</a>, as ever, show us what you've been working on, but as an additional side quest, what is a tutorial/guide or other inspiring FreeCAD content you've seen this week? <a href="https://fosstodon.org/tags/FreeCAD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#FreeCAD</a> <a href="https://fosstodon.org/tags/CAD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#CAD</a> <a href="https://fosstodon.org/tags/CAM" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#CAM</a> <a href="https://fosstodon.org/tags/BIM" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#BIM</a> <a href="https://fosstodon.org/tags/CFD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#CFD</a> <a href="https://fosstodon.org/tags/Opensource" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Opensource</a>

idw_onlineDie Förderung von <a href="https://idw-online.social/tags/Strom" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Strom</a> aus Erneuerbaren muss in D reformiert werden. <a href="https://idw-online.social/tags/CfD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#CfD</a> <a href="https://idw-online.social/tags/EEG" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#EEG</a>Welche Pflichten und Spielräume D nun hat, zeigen wir in einem kostenfreien Online-Seminar: 30. April 2025, 9-10 UhrMehr Infos und Anmeldung: <a href="https://stiftung-umweltenergierecht.de/veranstaltungen/" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://stiftung-umweltenergierecht.de/veranstaltungen/</a> <a href="https://nachrichten.idw-online.de/2025/04/24/online-seminar-zu-cfd-und-co-eu-vorgaben-fuer-rueckzahlungsinstrumente-bei-der-foerderung-von-strom-aus-erneuerbaren" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://nachrichten.idw-online.de/2025/04/24/online-seminar-zu-cfd-und-co-eu-vorgaben-fuer-rueckzahlungsinstrumente-bei-der-foerderung-von-strom-aus-erneuerbaren</a>

Vehicle Physics<a href="https://mastodon.gamedev.place/tags/ScreenshotSaturday" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ScreenshotSaturday</a> The 424 is undergoing a major redesign.<a href="https://perrinn.com/chat/FZn4icU4Xuw9P7Uufz0H" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://perrinn.com/chat/FZn4icU4Xuw9P7Uufz0H</a><a href="https://mastodon.gamedev.place/tags/Motorsport" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Motorsport</a> <a href="https://mastodon.gamedev.place/tags/PERRINN" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#PERRINN</a> <a href="https://mastodon.gamedev.place/tags/Project424" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Project424</a> <a href="https://mastodon.gamedev.place/tags/Engineering" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Engineering</a> <a href="https://mastodon.gamedev.place/tags/DigitalTwins" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#DigitalTwins</a> <a href="https://mastodon.gamedev.place/tags/CFD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#CFD</a>

concretedogGetting a bit further with my exploration of Computational Fluid Dynamics (CFD) this evening. Using the mighty <a href="https://fosstodon.org/@FreeCAD" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@FreeCAD</a> I've modelled this "Ballute" style parachute and simulated it descending at 6m/s in air. The air velocity is plotted in the images. Ace to see the turbulence in the point cloud/steam chaser view. If any <a href="https://mastodon.social/tags/CFD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#CFD</a> experts fancy a chat.... I HAVE QUESTIONS! <a href="https://mastodon.social/tags/OpenFOAM" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#OpenFOAM</a> <a href="https://mastodon.social/tags/FreeCAD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#FreeCAD</a>

idw_onlineOft wird angenommen, dass künftig die Förderung von <a href="https://idw-online.social/tags/Strom" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Strom</a> aus Erneuerbaren nach dem <a href="https://idw-online.social/tags/EEG" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#EEG</a> 2023 pauschal auf <a href="https://idw-online.social/tags/CfD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#CfD</a> umgestellt werden muss. Wie eine neue Studie der Stiftung <a href="https://idw-online.social/tags/Umweltenergierecht" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Umweltenergierecht</a> zeigt, bestehen aber mehr Spielräume als gedacht. <a href="https://nachrichten.idw-online.de/2025/04/15/zweiseitige-differenzvertraege-cfd-und-eu-recht-spielraeume-bei-der-reform-des-eeg-2023" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://nachrichten.idw-online.de/2025/04/15/zweiseitige-differenzvertraege-cfd-und-eu-recht-spielraeume-bei-der-reform-des-eeg-2023</a>

concretedogFollowing on from my earlier stuff about being inspired about parachute/recovery systems and Ballute design in <a href="https://fosstodon.org/@FreeCAD" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@FreeCAD</a> I've dived into setting up the CfDoF workbench and bashing through a simple tutorial pushing water through a stepped tube. I think I borked the glyph a little, but I feel like I've learnt a little... and seen a LOT to learn. <a href="https://mastodon.social/tags/OpenFOAM" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#OpenFOAM</a> <a href="https://mastodon.social/tags/CFD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#CFD</a> <a href="https://mastodon.social/tags/Paraview" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Paraview</a>

Dr. Moritz LehmannWhat an honor to start the <a href="https://mast.hpc.social/tags/IWOCL" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#IWOCL</a> conference with my keynote talk! Nowhere else you get to talk to so many <a href="https://mast.hpc.social/tags/OpenCL" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#OpenCL</a> and <a href="https://mast.hpc.social/tags/SYCL" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#SYCL</a> experts in one room! I shared some updates on my <a href="https://mast.hpc.social/tags/FluidX3D" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#FluidX3D</a> <a href="https://mast.hpc.social/tags/CFD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#CFD</a> solver, how I optimized it at the smallest level of a single grid cell, to scale it up on the largest <a href="https://mast.hpc.social/tags/Intel" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Intel</a> <a href="https://mast.hpc.social/tags/Xeon6" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Xeon6</a> <a href="https://mast.hpc.social/tags/HPC" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#HPC</a> systems that provide more memory capacity than any <a href="https://mast.hpc.social/tags/GPU" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#GPU</a> server. 🖖😃

Vehicle Physics<a href="https://mastodon.gamedev.place/tags/ScreenshotSaturday" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ScreenshotSaturday</a> The 424 is undergoing a major redesign, integrating a new front powertrain concept. Key updates include a narrower chassis for a central driving position, an extended nose, refined aerodynamics, and a roof opening. The development continues, with CFD testing planned soon.<a href="https://mastodon.gamedev.place/tags/PERRINN" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#PERRINN</a> <a href="https://mastodon.gamedev.place/tags/Project424" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Project424</a> <a href="https://mastodon.gamedev.place/tags/Showcase" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Showcase</a> <a href="https://mastodon.gamedev.place/tags/Motorsport" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Motorsport</a> <a href="https://mastodon.gamedev.place/tags/Engineering" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Engineering</a> <a href="https://mastodon.gamedev.place/tags/DigitalTwins" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#DigitalTwins</a> <a href="https://mastodon.gamedev.place/tags/onshape" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#onshape</a> <a href="https://mastodon.gamedev.place/tags/CFD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#CFD</a>

Dr. Moritz LehmannI made this <a href="https://mast.hpc.social/tags/FluidX3D" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#FluidX3D</a> <a href="https://mast.hpc.social/tags/CFD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#CFD</a> simulation run on a frankenstein zoo of 🟥AMD + 🟩Nvidia + 🟦Intel <a href="https://mast.hpc.social/tags/GPU" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#GPU</a>s! 🖖🤪 <a href="https://www.youtube.com/watch?v=_8Ed8ET9gBU" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://www.youtube.com/watch?v=_8Ed8ET9gBU</a>The ultimate SLI abomination setup: - 1x Nvidia A100 40GB - 1x Nvidia Tesla P100 16GB - 2x Nvidia A2 15GB - 3x AMD Instinct MI50 - 1x Intel Arc A770 16GBI split the 2.5B cells in 9 domains of 15GB - A100 takes 2 domains, the other GPUs 1 domain each. The GPUs communicate over PCIe via <a href="https://mast.hpc.social/tags/OpenCL" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#OpenCL</a>.Huge thanks to Tobias Ribizel from TUM for the hardware!

Dr. Moritz LehmannI got access to <a href="https://mastodon.social/@LRZ_DE" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@LRZ_DE</a>'s new coma-cluster for <a href="https://mast.hpc.social/tags/OpenCL" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#OpenCL</a> benchmarking and experimentation 🖖😋💻🥨🍻 I've added a ton of new <a href="https://mast.hpc.social/tags/FluidX3D" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#FluidX3D</a> <a href="https://mast.hpc.social/tags/CFD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#CFD</a> <a href="https://mast.hpc.social/tags/GPU" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#GPU</a>/<a href="https://mast.hpc.social/tags/CPU" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#CPU</a> benchmarks: <a href="https://github.com/ProjectPhysX/FluidX3D?tab=readme-ov-file#single-gpucpu-benchmarks" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://github.com/ProjectPhysX/FluidX3D?tab=readme-ov-file#single-gpucpu-benchmarks</a>Notable hardware configurations include: - 4x H100 NVL 94GB - 2x Nvidia L40S 48GB - 2x Nvidia A2 15GB datacenter toaster - 2x Intel Arc A770 16GB - AMD+Nvidia SLI abomination consisting of 3x Instinct MI50 32GB + 1x A100 40GB - AMD Radeon 8060S (chonky Ryzen AI Max+ 395 iGPU with quad-channel RAM) thanks to <a href="https://mast.hpc.social/@cheese" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@cheese</a>

Vehicle PhysicsProud to be part of the PERRINN 424 project alongside these amazing companies!<a href="https://discover.perrinn.com/perrinn-com/perrinn-early-days" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://discover.perrinn.com/perrinn-com/perrinn-early-days</a><a href="https://mastodon.gamedev.place/tags/Simracing" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Simracing</a> <a href="https://mastodon.gamedev.place/tags/Racing" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Racing</a> <a href="https://mastodon.gamedev.place/tags/Motorsport" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Motorsport</a> <a href="https://mastodon.gamedev.place/tags/Perrinn" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Perrinn</a> <a href="https://mastodon.gamedev.place/tags/Project424" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Project424</a> <a href="https://mastodon.gamedev.place/tags/Engineering" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Engineering</a> <a href="https://mastodon.gamedev.place/tags/DigitalTwins" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#DigitalTwins</a> <a href="https://mastodon.gamedev.place/tags/CFD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#CFD</a> <a href="https://mastodon.gamedev.place/tags/onshape" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#onshape</a>

Giuseppe BilottaThis thread about writing games vs writing game engines <<a href="https://peoplemaking.games/@eniko/114137694102639793" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://peoplemaking.games/@eniko/114137694102639793</a>> by <a href="https://peoplemaking.games/@eniko" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@eniko</a>, and the comments within by many other people, is a fascinating read for me, particularly in relation to the similarities and the differences with our experience in the development of what is, for all intents and purposes, a <a href="https://fediscience.org/tags/CFD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#CFD</a> engine, but also many of the test cases it has been used for.For many <a href="https://fediscience.org/tags/ComputationalFluidDynamics" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ComputationalFluidDynamics</a> methods, it's actually pretty simple to write an implementation for a “trivial” test case (straight walls, right angles if any at all, periodic boundary conditions, etc). We did that for example in a couple of hours during the MODCLIM 2016 training school <a href="https://modclim.ulpgc.es/index.php/events/8-modclim-events" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://modclim.ulpgc.es/index.php/events/8-modclim-events</a>Things become quickly non-trivial as soon as you start needing1. non-trivial geometriesand2. more complex physics and/or more sophisticated methods.1/

Jocelyn<a href="https://indieweb.social/@majeriisli" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@majeriisli</a> <a href="https://social.sciences.re/@CCochard" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@CCochard</a> I like that. In the times when I was doing <a href="https://mastodon.gougere.fr/tags/CFD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#CFD</a>, which usually stands for computational fluid dynamics but that envious experimentalists dubbed colourful fluid dynamics, I once presented the dynamics of a gravity current in black and white, with just isolines of density. I was very happy with the reaction of a colleague: he told me an empirical universal constant was number of colours times reliability of the numerics, so that my work was probably pretty good :)

Dr. Moritz Lehmann<a href="https://mast.hpc.social/tags/FluidX3D" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#FluidX3D</a> <a href="https://mast.hpc.social/tags/CFD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#CFD</a> v3.2 is out! I've implemented the much requested <a href="https://mast.hpc.social/tags/GPU" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#GPU</a> summation for object force/torque; it's ~20x faster than <a href="https://mast.hpc.social/tags/CPU" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#CPU</a> <a href="https://mast.hpc.social/tags/multithreading" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#multithreading</a>. 🖖😋 Horizontal sum in <a href="https://mast.hpc.social/tags/OpenCL" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#OpenCL</a> was a nice exercise - first local memory reduction and then hardware-supported atomic floating-point add in VRAM, in a single-stage kernel. Hammering atomics isn't too bad as each of the ~10-340 workgroups dispatched at a time does only a single atomic add. Also improved volumetric <a href="https://mast.hpc.social/tags/raytracing" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#raytracing</a>! <a href="https://github.com/ProjectPhysX/FluidX3D/releases/tag/v3.2" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://github.com/ProjectPhysX/FluidX3D/releases/tag/v3.2</a>

Dr. Moritz LehmannHot Aisle's 8x AMD <a href="https://mast.hpc.social/tags/MI300X" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#MI300X</a> server is the fastest computer I've ever tested in <a href="https://mast.hpc.social/tags/FluidX3D" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#FluidX3D</a> <a href="https://mast.hpc.social/tags/CFD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#CFD</a>, achieving a peak <a href="https://mast.hpc.social/tags/LBM" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#LBM</a> performance of 205 GLUPs/s, and a combined VRAM bandwidth of 23 TB/s. 🖖🤯 The <a href="https://mast.hpc.social/tags/RTX" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#RTX</a> 5090 looks like a toy in comparison.MI300X beats even Nvidia's GH200 94GB. This marks a very fascinating inflection point in <a href="https://mast.hpc.social/tags/GPGPU" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#GPGPU</a>: <a href="https://mast.hpc.social/tags/CUDA" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#CUDA</a> is not the performance leader anymore. 🖖😛 You need a cross-vendor language like <a href="https://mast.hpc.social/tags/OpenCL" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#OpenCL</a> to leverage its power.FluidX3D on <a href="https://mast.hpc.social/tags/GitHub" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#GitHub</a>: <a href="https://github.com/ProjectPhysX/FluidX3D" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://github.com/ProjectPhysX/FluidX3D</a>

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