R. M. Caplan (@sumseq) header
R. M. Caplan (@sumseq) profile picture

R. M. Caplan

@sumseq

Computational Scientist (views mine)

 California, USA
Joined March 2011
  • Tweets1.4K
  • Following246
  • Followers239
276Media
Photo by R. M. Caplan (@sumseq)Photo by R. M. Caplan (@sumseq)Photo by R. M. Caplan (@sumseq)Photo by R. M. Caplan (@sumseq)Photo by R. M. Caplan (@sumseq)Photo by R. M. Caplan (@sumseq)Photo by R. M. Caplan (@sumseq)Photo by R. M. Caplan (@sumseq)Photo by R. M. Caplan (@sumseq)
R. M. Caplan retweeted
LFortran (@lfortranorg) profile picture
LFortran@lfortranorg4h
LFortran runs POT3D on H200 faster than NVFORTRAN. fortran-lang.discourse.group…
LFortran runs POT3D on H200 faster than NVFORTRAN

LFortran runs POT3D on H200 faster than NVFORTRAN

I just merged the last PR into main, so LFortran now runs the @sumseq’s POT3D code with do concurrent (no other directives or pragmas) on NVIDIA GPU and is faster than NVFORTRAN (both with do...

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R. M. Caplan retweeted
Ondřej Čertík (@OndrejCertik) profile picture
Ondřej Čertík
@OndrejCertik4h
Another little win that I wanted to do for a long time. This is just the beginning, our goal is to run all the codes at high performance on all platforms.
LFortran (@lfortranorg) profile pictureLFortran@lfortranorg4h
LFortran runs POT3D on H200 faster than NVFORTRAN. fortran-lang.discourse.group…
LFortran runs POT3D on H200 faster than NVFORTRAN

LFortran runs POT3D on H200 faster than NVFORTRAN

I just merged the last PR into main, so LFortran now runs the @sumseq’s POT3D code with do concurrent (no other directives or pragmas) on NVIDIA GPU and is faster than NVFORTRAN (both with do...

fortran-lang.discourse.group
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List of #Fortran talks at SC26! @fortrantip @FortranWiki @fortranlang @Supercomputing fortran-lang.discourse.group…
Image from R. M. Caplan (@sumseq)
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Supercomputing Hyperwall Schedule science.nasa.gov/earth/super… via @NASA
Supercomputing Hyperwall Schedule - NASA Science

Supercomputing Hyperwall Schedule - NASA Science

FFA 2026 Hyperwall Schedule

science.nasa.gov
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#SC26 @fortranlang @FortranWiki @fortrantip @AMDGPU_ @AMDServer @NASAAmes @OpenMP_ARB @OpenACCorg @Supercomputing #poweredbyFortran
Predictive Science Inc. (@predsci) profile picturePredictive Science Inc.@predsciNov 6
Are you going to #sc26? Come see and learn about PSI's cutting-edge #supercomputing work in the exhibit hall and "Art of HPC" exhibit! #hpc #fortran #gpu #chicago
Image from Predictive Science Inc. (@predsci)
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Are you going to #sc26? Come see and learn about PSI's cutting-edge #supercomputing work in the exhibit hall and "Art of HPC" exhibit! #hpc #fortran #gpu #chicago
Image from Predictive Science Inc. (@predsci)
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We're giving away a Hogwarts Legacy custom wrapped NVIDIA GeForce RTX 5090 to celebrate its official release with DLSS 5 🪄 To enter: 🟢 Share this post 🟢 Comment #RTXON
Image from NVIDIA GeForce UK (@NVIDIAGeForceUK)
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R. M. Caplan retweeted
LFortran (@lfortranorg) profile picture
LFortran@lfortranorgNov 4
LFortran now supports NVIDIA, AMD and Apple GPU offloading of do concurrent: fortran-lang.discourse.group…
LFortran runs Fiats and Formal on GPUs!

LFortran runs Fiats and Formal on GPUs!

Although Fortran compilers from NVIDIA, Intel, HPE, LLVM, and LFortran all offer automatic execution of do concurrent on GPUs, LFortran 0.68.0 is the first compiler to support automatic GPU execution...

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LGTM (Looks Good to Me) - Claude Opus 5.5 music video youtu.be/3TNpOD6bov8?si=J-AD… This song rings true....
LGTM (Looks Good to Me) - Claude Opus 5.5 music video

LGTM (Looks Good to Me) - Claude Opus 5.5 music video

LGTM stands for "looks good to me". Lately it's what engineers type...

youtube.com
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A python user tries @fortranlang ... suno.com/s/tyKDTnG9W9RIy7nV
Fortran, You've Won Me Over

Fortran, You've Won Me Over

Listen and make your own on Suno.

suno.com
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swsc-journal.org/articles/sw… Check out our new paper on long-duration flux transport modeling of the solar surface magnetic field, showing (among other things) that random flux emergence can build up polar fields. The simulations used HipFT (github.com/predsci/hipft) which is #poweredbyfortran and uses Fortran standard parallelism to run on GPUs. The simulations were run on an NVIDIA A100 GPU using the NVIDIA HPC SDK compilers, allowing for multi-decade simulations to run in reasonable times.
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R. M. Caplan retweeted
Tesla (@Tesla) profile picture
Tesla
@TeslaOct 15
Roadster event livestream xitter.twitterapi.xyz/i/broadcasts/1yKAPwNgg…
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Tesla

Roadster

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FortranCon2025 09 Keynote Reid - Reflections on working for 45 years on ... youtu.be/LqtQDLhT4Eg?si=Bdze… via @YouTube
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LUMI-AI is a major step forward for European sovereign AI and AI for Science. Powered by @AMD Instinct MI430X GPUs, it brings modern AI acceleration together with up to 288 TFLOPS of hardware FP64 per GPU. newsroom.amd.com/news/amd-in…
AMD Instinct GPUs and EPYC CPUs to Power Europe’s…

AMD Instinct GPUs and EPYC CPUs to Power Europe’s…

Built on AMD Instinct MI430X GPUs and 6th Gen AMD EPYC CPUs, LUMI-AI will expand AI and HPC capacity for researchers, startups and industry across…

newsroom.amd.com
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Dynamic Solar Corona Modeling youtu.be/TYLQ3IHSQdk?si=eOJt… via @YouTube
Dynamic Solar Corona Modeling

Dynamic Solar Corona Modeling

A team of scientists with Predictive Science Inc. used SDSC's Expan...

youtube.com
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Want to run your @fortranlang #Fortran code on GPUs but don't want to add external APIs or directives? Check out our new paper on using Fortran's "do concurrent" to run on NVIDIA, AMD, and Intel GPUs! arxiv.org/abs/2608.20586 Adding @OpenMP_ARB data movement directives can help with efficiency (on Intel GPUs) and for some GPUs are required (AMD consumer GPUs), but for many cases, "Fortran-only" works great - even across multiple multi-GPU nodes! @FortranWiki @fortrantip @nvidiadeveloper @AMDGPU_ @AMDServer @IntelDevTools @inteldevs
Portability of Fortran's 'do concurrent' on GPUs II

Portability of Fortran's 'do concurrent' on GPUs II

There continues to be growing interest in using standard language constructs for parallel and accelerated HPC computing, avoiding the need for (sometimes vendor-specific) external APIs. For...

arxiv.org
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Eclipse happening soon! Check out PSI's prediction at eclipse.predsci.com Time to compare! #eclipse #eclipse2026 @NASA @SkyandTelescope
Real-Time Solar Corona Prediction — August 12, 2026 Total Solar Eclipse | Predictive Science Inc.

Real-Time Solar Corona Prediction — August 12, 2026 Total Solar Eclipse | Predictive Science Inc.

Predictive Science Inc.'s data-assimilative, continuously running prediction model updated in near real time for the August 12, 2026 total solar eclipse.

eclipse.predsci.com
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2026 Total Solar Eclipse youtube.com/live/rSvCuSQhC3w… via @YouTube
2026 Total Solar Eclipse

2026 Total Solar Eclipse

Come watch the eclipse with NASA.On Wednesday, Aug. 12, a total s...

youtube.com
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Perfect Chance: A Direct Solar Storm Hit & Total Solar Eclipse | Solar S... youtu.be/-BKXXR7m5No?si=FBIk… via @YouTube
Perfect Chance: A Direct Solar Storm Hit & Total Solar Eclipse | Solar Storm Forecast 11 August 2026

Perfect Chance: A Direct Solar Storm Hit & Total Solar Eclipse | Solar Storm Forecast 11 August 2026

00:00 Intro: Two solar storms inbound — direct hit + glancing blow...

youtube.com
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