#jj-vcs For Busy Devs, Part 2: "How Do I...?"
maddie.wtf/posts/2025-0...
@dssgabriel.bsky.social
PhD candidate, HPC Software Engineering @cea.fr MSc HPC & Simulation from @univparissaclay.bsky.social Architecture, microbenchmarking & SIMD sorcery. Research on data structures & memory layouts at exascale. RTFM πΉ
#jj-vcs For Busy Devs, Part 2: "How Do I...?"
maddie.wtf/posts/2025-0...
I just finished my first meaningful #APX code path: #SHA3 / #Keccak1600 on 32 GPR registers: Only 130 uops + a few MOVs. I wonder if it can beat the latency of 35+ uop #AVX512 version on #Intel #DiamondRapids.
#Novalake , #PantherCove , #CoyoteCove
I see! Indeed, I can think of a few times where it would have been really useful to be able to do this.
Thank you very much for your explanation!
"throw" expression has type "void", but has one special case if it is one of the cases in a ternary "?:" expression, where its void is "converted" to the other operand. This is the only situation where this happens, but it could be extended arbitrarily for return, break, continue, and goto.
26.07.2025 18:31 β π 1 π 1 π¬ 1 π 0Agner Fog updated his manuals with the #AMD #Zen5
agner.org/optimize/
I am not familiar with "throwβs weird void but special type". What is that and what would it allow for `return`? Do you have any resources I could read about it?
26.07.2025 16:53 β π 1 π 0 π¬ 1 π 0Final Benchmarks Of Clear Linux On Intel: ~48% Faster Than Ubuntu Out-Of-The-Box - https://www.phoronix.com/review/clear-linux-48p-ubuntu
25.07.2025 18:12 β π 9 π 2 π¬ 0 π 0π₯Spack v1.0 is out!π₯
This is a huge milestone. We reworked the core to add compiler dependencies, and we're introducing a stable package API.
π1.0 also adds concurrent builds, better includes, and much more -- read it all in the release notes!
github.com/spack/spack/...
Intel Announces It's Shutting Down Clear Linux - https://www.phoronix.com/news/Intel-Ends-Clear-Linux
18.07.2025 22:12 β π 10 π 3 π¬ 3 π 0#DΓ©fenseπ‘| π¨ La dixiΓ¨me newsletter du CEA est en ligne !
Tous les deux mois, la newsletter du CEA cβest un dossier dβactualitΓ© au β€ de nos mΓ©tiers.
Aujourdβhui, zoom sur la propulsion nuclΓ©aire, un atout pour la France π bit.ly/CEANewslette...
Since Glenn is a storage guyβ¦ What about DDN? π€
11.07.2025 18:05 β π 2 π 0 π¬ 0 π 0Please join us in welcoming RβCCS as our newest General Member π
R-CCS brings deep expertise in high performance computing and optimization for Arm systems, and is the team behind the Fugaku supercomputer.
Read more: hpsf.io/blog/2025/hp...
#AMD #Instinct #MI300 Instruction Set Architecture Reference Guide:
www.amd.com/content/dam/...
Hello you fine Internet folks,
Today's article is on Nvidia's RTX PRO 6000 Blackwell and diving into the Blackwell architecture generally and more specifically into the GB202 GPU die in the RTX PRO 6000.
Hope y'all enjoy!
chipsandcheese.com/p/blackwell-...
old.chipsandcheese.com/2025/06/28/b...
Glenn Posted his ISC recap, and as always, it's excellent. The exert on Mixed precision and Ozaki did have me giggling whilst reading.
I think it's relevant to add some high level context on *why* we vendors decrease FP64; it's not just chasing AI, it's the shear *cost* of FP64.
The short ...
Finishing some runtime system work; decided to try a #deskpi #super6c cluster board.
An ITX form factor beowulf cluster is amazing.
#slurm & #nfs worked out of apt.
#ucx, #openmpi, #openshmem, #openpmix, #gasnet, & #hpx needed custom compilation.
@raspberrypi.com #arm #hpc #supercomputing
Would be interesting to have CDNA 3 vs. 4 as well
23.06.2025 17:31 β π 0 π 0 π¬ 0 π 0would greping for `\item` work?
22.06.2025 11:10 β π 0 π 0 π¬ 1 π 0I believe we should get more news on Alice Recoque by the end of summer.
I got to visit the room that will house the system this past Monday! Still under construction, but things seem to be progressing nicely. π
Thank you for your answer Andreas! I am looking forward to see the JUPITER system fully installed π
19.06.2025 06:48 β π 0 π 0 π¬ 1 π 0I know, we are also waiting on our samples to arrive, so I imagine that JΓΌlich havenβt received theirs either π SiPearl has been scrambling with Rhea1 for too long though. I donβt understand whatβs taking them this much time to deliver on itβ¦ Itβs not like they had to design the uarch from scratch.
19.06.2025 06:46 β π 0 π 0 π¬ 0 π 0Will the full HPL run also include the Rhea1s? Or is it only the score for the BOOSTER partition that you submit to TOP500?
18.06.2025 22:02 β π 0 π 0 π¬ 1 π 0@thoefler.bsky.social in the closing session of #ISC25 said his first and more sincere goodbye to our friend @hpcguru.bsky.social announcing his retirement! Torsten still hopes that HPC Guru plan will fail, but if that really happens we should thank him for such amazing years of #HPC together!
12.06.2025 16:30 β π 15 π 3 π¬ 1 π 0All things, with one exception, have to end
After years of sharing #HPC news and insights, it's time to log off
It was fun while it lasted and I remain grateful to all of you who followed and interacted
Stay curious, stay kind!
β @hpcguru.bsky.social signing off
#HPC #Farewell
JUPITER supercomputer, powered by the NVIDIA Grace Hopper platform, is the fastest in Europe β delivering a more than 2x speedup for #HPC and #AI workloads compared with the next-fastest system
nvidianews.nvidia.com/news/nvidia-...
#ISC25
At the #ISC25 vendor showdown, I think Bruno from Eviden captured a key difference between HPC and AI businesses. Paraphrasing, HPC people like to fuss with the system. AI customers donβt care about the system. Suggests why NVIDIA has been so successful. Meet the customers where they are.
10.06.2025 11:15 β π 11 π 3 π¬ 1 π 0ISC 2025 HPSF Community Birds of a Feather (BoF) + marking one year since launch at last year's ISC π₯ with panelists:
π Julien Bigot, CEA
π Christian Trott, Sandia National Laboratories
π Heidi Poxon, NVIDIA
π Todd Gamblin, LLNL
π Andy Warner, HPE
#HPSF #HPC #HighPerformanceSoftware #ISC25
CppNorth 2025: Write better C++!
Join Olivia Wasalski: "On Coding Guidelines, Class Invariants, and Special Member Functions." Master 5 guidelines & special member functions' interaction with invariants for cleaner, robust C++.
π sched.co/21xRE
Tickets: CppNorth.ca
π Toronto, July 20-23! #CppNorth
AheadComputing: A group of researchers has departed from Intel to launch a startup with ambitions to create what they describe as βthe biggest, baddest CPUβ the world has ever seen
www.webpronews.com/intel-execs-...
#HPC #AI
New blog post: From Boolean logic to bitmath and SIMD: transitive closure of tiny graphs
bitmath.blogspot.com/2025/06/from...