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Axel Huebl

@axccl.bsky.social

computational physicist • accelerates accelerator research at @berkeleylab.bsky.social • laser-plasma aficionado • PByte connoisseur • mostly memory BW bound • openPMD • sciency C++ & 🐍 • GPGPU since before it was cool • he/his • Dr. rer. nat. Dipl.-Phys.

272 Followers  |  248 Following  |  131 Posts  |  Joined: 29.12.2023  |  1.67

Latest posts by axccl.bsky.social on Bluesky

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AMReX SIMD Helpers by ax3l · Pull Request #4520 · AMReX-Codes/amrex Summary AMReX does not have a concept yet to help users write effective SIMD code on CPU, besides relying on auto-vectorization and pragmas, which are unreliable for any complex enough code. [1] Lu...

The linked PR contains the small helpers used in the application code, to keep the code performance portable/single source for CPU/GPU:
github.com/AMReX-Codes/...

01.08.2025 03:25 — 👍 0    🔁 0    💬 0    📌 0

🎉

31.07.2025 13:33 — 👍 0    🔁 0    💬 0    📌 0
CPU SIMD Support by ax3l · Pull Request #1002 · BLAST-ImpactX/impactx todo See AMReX-Codes/amrex#4520 To Do update install docs update CI (partially): SIMD, ideally even single-precision (uncovers more issues at compile-time) Benchmarks on Dane (LLNL) Machine: Da...

C++ std::simd (ok, std::datapar) is cool. Portable, order-of-magnitude speedups (w/ modern CPUs and the right, flop intense algorithms) 🚀 #HPC #SIMD
github.com/BLAST-Impact...

31.07.2025 08:12 — 👍 4    🔁 2    💬 2    📌 0
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MUG :: Home

The 13th MVAPICH User Group (MUG) Conference is coming up (Aug 18-20 in Columbus). It's a great event for focused technical presentations around MPI and network performance. Great speaker lineup too. Wish I could make it in-person, but virtual attendance is free

mug.mvapich.cse.ohio-state.edu

#HPC

29.07.2025 21:40 — 👍 4    🔁 2    💬 0    📌 0

Congratulations!!

21.07.2025 04:31 — 👍 4    🔁 0    💬 0    📌 0

💥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/...

20.07.2025 10:45 — 👍 41    🔁 16    💬 0    📌 5

Sure you can type ⬆️ ⬆️ ⬆️ ⬆️ ⬆️ ⬆️

To get back to that command you need.

But did you also know, you can just type:

! 25

To get the 25th command?

So let me ask you this…

Do you feel lucky punk?

DO YOU FEEL LUCKY???

#unix #cmdroulette

18.07.2025 20:06 — 👍 5    🔁 2    💬 5    📌 0

"All scripts are part of the supplementary materials."

The supplementary materials:
!123
!42
!11
!25
echo "done"
!1

19.07.2025 21:51 — 👍 1    🔁 0    💬 0    📌 0

Truth be told, !11 is faster to type and I cannot remember it either. Game on!

19.07.2025 21:47 — 👍 0    🔁 0    💬 1    📌 0

Dang, I usually can only remember my last 24 commands... 😏

19.07.2025 21:44 — 👍 1    🔁 0    💬 1    📌 0

But this does not auto execute, sadly. Unless you have a nervous enter trigger finger in muscle memory 😂

19.07.2025 21:43 — 👍 2    🔁 0    💬 0    📌 0

New #HPC Job! 😍️
HPC Software Scientist: Mixed Precision in molecular dynamics / GROMACS
Location: Stockholm, sweden
Employer: KTH Royal Institute of Technology in Stockholm
Remote: Remote friendly

03.07.2025 03:15 — 👍 3    🔁 4    💬 0    📌 0

I really hope it's "tinker around in the dark until your test returns 'cool'" 🤞

05.07.2025 21:51 — 👍 1    🔁 0    💬 0    📌 0

Submission deadline is August 8th!

04.07.2025 03:19 — 👍 0    🔁 0    💬 0    📌 0
ISAV 2025: In Situ AI, Analysis and Visualization Information for the SC’25 conference ISAV workshop

CfP: We are looking for talks/short/long papers to #ISAV 2025: In Situ AI, Analysis and Visualization!

Are you working on in situ methods, algorithms or the synthesis between HPC & AI/ML? Share your best results as papers, your ideas as short papers or talks! #SC25
isav-workshop.github.io/2025/

04.07.2025 03:09 — 👍 0    🔁 1    💬 1    📌 0

I hear some for days here north of Berkeley

03.07.2025 05:32 — 👍 0    🔁 0    💬 0    📌 0

computer still bad

01.07.2025 06:28 — 👍 19    🔁 2    💬 1    📌 0

Oh whelp, that is something to be concerned of.

01.07.2025 00:38 — 👍 2    🔁 0    💬 1    📌 0

"found" or hallucinated sources?

I mean, one of those it is good at. 😁

30.06.2025 23:22 — 👍 0    🔁 0    💬 1    📌 0

🎉

28.06.2025 05:52 — 👍 0    🔁 0    💬 0    📌 0

Detective Conan ist fire 🔥 mein Freund, how dare u

28.06.2025 01:51 — 👍 1    🔁 0    💬 1    📌 0

🖐️

23.06.2025 00:33 — 👍 0    🔁 0    💬 0    📌 0

Wild! What's next?? Using the spare wooden dowel from shelf 2 in shelf 3?!

21.06.2025 20:57 — 👍 2    🔁 0    💬 1    📌 0

Came for the LinkedIn dunk, stayed for the Unix dad joke

18.06.2025 00:37 — 👍 2    🔁 0    💬 1    📌 0

😂🤗

18.06.2025 00:35 — 👍 0    🔁 0    💬 0    📌 0
Mashup of Dread Pirate Roberts from Princess Bride and the “I am HPC Guru” button

Mashup of Dread Pirate Roberts from Princess Bride and the “I am HPC Guru” button

Dread HPC Guru Roberts

12.06.2025 03:08 — 👍 11    🔁 2    💬 0    📌 0
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All 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!

— @hpcguru.bsky.social signing off

#HPC #Farewell

11.06.2025 06:39 — 👍 110    🔁 14    💬 45    📌 3

You will be missed! I had a lot of fun and insights with your posts, thank you for being such a great and lighthearted part of our community, supporting and connecting so many of us ☺️

12.06.2025 02:38 — 👍 2    🔁 0    💬 0    📌 0

Get well soon!

12.06.2025 02:34 — 👍 1    🔁 0    💬 1    📌 0
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Elementary Particle Physics: The Higgs and Beyond Read online, download a free PDF, or order a copy in print.

MAJOR PARTICLE PHYSICS REPORT RELEASE ⚛️🧪

The National Academies particle physics decadal report is out! Read read!

(I was a member of the committee that wrote this report but resigned during drafting bc of a conflict of service w/my HEPAP appointment.)

nap.nationalacademies.org/catalog/2883...

11.06.2025 15:26 — 👍 273    🔁 73    💬 7    📌 5

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