Torsten Hoefler 🇨🇭 (@thoefler) 's Twitter Profile
Torsten Hoefler 🇨🇭

@thoefler

Professor @ETH_en, head of @spcl_eth, Chief Architect ML @cscsch researching large-scale #HPC and #AI systems and #Climate computing - youtube: bit.ly/3h1VgIU

ID: 62059377

linkhttp://htor.inf.ethz.ch calendar_today01-08-2009 15:54:19

3,3K Tweet

5,5K Followers

214 Following

SPCL@ETH (@spcl_eth) 's Twitter Profile Photo

DaCe in action at PASC25! Four posters illustrate the impact of data-centric optimizations on climate and weather modeling. 1⃣ Accelerating the ICON dynamical core as a GT4Py backend. #pasc25 #exclaim #cscs #meteoswiss CSCS Lugano Torsten Hoefler 🇨🇭

DaCe in action at <a href="/PASC_Conference/">PASC25</a>! Four posters illustrate the impact of data-centric optimizations on climate and weather modeling.

1⃣ Accelerating the ICON dynamical core as a GT4Py backend. 

#pasc25 #exclaim #cscs #meteoswiss <a href="/cscsch/">CSCS Lugano</a> <a href="/thoefler/">Torsten Hoefler 🇨🇭</a>
CSCS Lugano (@cscsch) 's Twitter Profile Photo

CSCS@ISC25 - Torsten Hoefler 🇨🇭 (ETH Zurich & CSCS), program chair of ISC25, comments on the conference's highlights in a short interview with Maria-Grazia Giuffreda (#CSCS): youtu.be/L6SGHAMfvX8?fe… #wearealps #connectingthedots #ISC25

CSCS@ISC25 - <a href="/thoefler/">Torsten Hoefler 🇨🇭</a> (ETH Zurich &amp; CSCS), program chair of ISC25, comments on the conference's highlights in a short interview with Maria-Grazia Giuffreda (#CSCS): youtu.be/L6SGHAMfvX8?fe… #wearealps #connectingthedots #ISC25
SPCL@ETH (@spcl_eth) 's Twitter Profile Photo

Is changing and rewriting Fortran code for new architectures sustainable? With DaCe, we can get performance portability without changing a line of the original Fortran code! With DaCe, we're 1.32x faster on GH200 than manually written OpenACC code. #pasc25 #hpc #fortran Torsten Hoefler 🇨🇭

Is changing and rewriting Fortran code for new architectures sustainable? With DaCe, we can get performance portability without changing a line of the original Fortran code! With DaCe, we're 1.32x faster on GH200 than manually written OpenACC code.
#pasc25 #hpc #fortran <a href="/thoefler/">Torsten Hoefler 🇨🇭</a>
CSCS Lugano (@cscsch) 's Twitter Profile Photo

Join the Interdisciplinary School on Machine Learning & AI for Science in Heilbronn and don’t miss Prof. Torsten Hoefler’s public lecture: “Large Language Models – From Chatting to Reasoning”📅 June 23, 2025 • 🕗 20:00 • 📍 Bildungscampus 6, Heilbronn 🔗 ethz.ch/heilbronn/summ…

Join the Interdisciplinary School on Machine Learning &amp; AI for Science in Heilbronn and don’t miss Prof. Torsten Hoefler’s public lecture: “Large Language Models – From Chatting to Reasoning”📅 June 23, 2025 • 🕗 20:00 • 📍 Bildungscampus 6, Heilbronn 🔗 ethz.ch/heilbronn/summ…
Association for Computing Machinery (@theofficialacm) 's Twitter Profile Photo

Last weekend, we celebrated the outstanding achievements of computing innovators at the 2024 ACM Awards Banquet, held at The Palace Hotel in San Francisco. From visionary researchers to transformative educators, we honored those whose work is shaping the future of technology. 📸

Last weekend, we celebrated the outstanding achievements of computing innovators at the 2024 ACM Awards Banquet, held at The Palace Hotel in San Francisco. From visionary researchers to transformative educators, we honored those whose work is shaping the future of technology.

📸
Torsten Hoefler 🇨🇭 (@thoefler) 's Twitter Profile Photo

Swiss Intl. Airlines is a truly evil airline. Unwanted automatic check-in for Staralliance Gold Members, on a middle seat with plenty of better seats open! Just to coerce you to buy a better seat. I guess frequent fliers often have a higher budget? Make sure to avoid them!

Swiss Intl. Airlines is a truly evil airline. Unwanted automatic check-in for Staralliance Gold Members, on a middle seat with plenty of better seats open! Just to coerce you to buy a better seat. I guess frequent fliers often have a higher budget? 

Make sure to avoid them!
Satoshi Matsuoka (@profmatsuoka) 's Twitter Profile Photo

The workshop proposal deadline for the exciting upcoming SCA/HPCAsia 2006 in OSAKA is June 30! Please submit your proposal here: sca-hpcasia2026.jp/submit/worksho… It will be a 3000 person SC/ISC-like academic/industry conference Jan 26-29 2026, yours truly the General co-Chair :-)

Torsten Hoefler 🇨🇭 (@thoefler) 's Twitter Profile Photo

Is NVIDIA's GH200 the breakthrough for #HPC workloads, or is Grace merely a memory controller? In a Salishan Random Access talk, we analyze its memory system (with an Easter egg!) and demonstrate its potential for revolutionary science. 🎥🔬🚀 #NVIDIA #AI youtube.com/watch?v=vfSbjk…

Is NVIDIA's GH200 the breakthrough for #HPC workloads, or is Grace merely a memory controller? In a Salishan Random Access talk, we analyze its memory system (with an Easter egg!) and demonstrate its potential for revolutionary science. 🎥🔬🚀 #NVIDIA #AI

youtube.com/watch?v=vfSbjk…
About Switzerland (@abtswitzerland) 's Twitter Profile Photo

-ETH Zurich confirms its place among the world’s best! 🇨🇭 According to the QS World University Rankings 2026, ETH Zurich ranks 7th in the world - for the third time in a row. Key factors behind its success? 🔬 Excellent reputation among scientists worldwide 📚 A high number of

-ETH Zurich confirms its place among the world’s best! 🇨🇭

According to the QS World University Rankings 2026, ETH Zurich ranks 7th in the world - for the third time in a row.

Key factors behind its success? 
🔬 Excellent reputation among scientists worldwide
📚 A high number of
Torsten Hoefler 🇨🇭 (@thoefler) 's Twitter Profile Photo

Nice evening with the Dieter Schwarz Stiftung and the next-generation #AI for #Science experts at ETH Zurich's new Heilbronn campus. Now on my way to the IEEE Cloud Summit to give the first keynote Thursday. I'm looking forward to see many of you there! ieeecloudsummit.org

Torsten Hoefler 🇨🇭 (@thoefler) 's Twitter Profile Photo

Ultra Ethernet grows up quickly! 🚀 Our transport layer (UE Transport, UET) has officially been assigned UDP port 4793. Not only a beautiful prime number but also (++RoCE)++ 10 years later 😀 iana.org/assignments/se… Llooking forward to many #AI & #HPC implementations soon!

Ultra Ethernet grows up quickly! 🚀 

Our transport layer (UE Transport, UET) has officially been assigned UDP port 4793.

Not only a beautiful prime number but also (++RoCE)++ 10 years later 😀 

iana.org/assignments/se… 

Llooking forward to many #AI &amp; #HPC implementations soon!
Torsten Hoefler 🇨🇭 (@thoefler) 's Twitter Profile Photo

One big benefit of waking up at 4am, jetlagged, is the early morning run! Getting ready to talk about how #HPC drives the future of #AI #LLM and RLM architectures at the IEEE Cloud Summit in Washington, DC. How can #XaaS Accelerated Containers help? arxiv.org/abs/2401.04552

One big benefit of waking up at 4am, jetlagged, is the early morning run! 

Getting ready to talk about how #HPC drives the future of #AI #LLM and RLM architectures at the IEEE Cloud Summit in Washington, DC. 

How can #XaaS Accelerated Containers help? arxiv.org/abs/2401.04552
Torsten Hoefler 🇨🇭 (@thoefler) 's Twitter Profile Photo

ISC concluded :-). With a final attendee count of 3.585, the biggest ISC ever. Thanks for the opportunity to lead this year's journey - I immensely enjoyed working with Tanja, Nages, and the team! I passed the baton to Rosa Badia. Onward! isc-hpc.com/isc-2025-concl…

Torsten Hoefler 🇨🇭 (@thoefler) 's Twitter Profile Photo

"Swiss deep tech companies [...] created more than $100 billion worth of enterprise value." The result of sustained investment into top-class education, research, computational tools, and collaboration. Every dollar spent multiplies the Swiss economy. forbes.com/sites/davidpro…

Torsten Hoefler 🇨🇭 (@thoefler) 's Twitter Profile Photo

Noam Brown (OpenAI) points out that availability of compute were the major limitation in getting to reasoning earlier. "People just underestimated how much [compute] would make [in poker]" - "I would have predicted 10x, not 100,000x". youtube.com/watch?v=Gr_eYX… (around 11:30)

Noam Brown (OpenAI) points out that availability of compute were the major limitation in getting to reasoning earlier. "People just underestimated how much [compute] would make [in poker]" - "I would have predicted 10x, not 100,000x".

youtube.com/watch?v=Gr_eYX… (around 11:30)
SPCL@ETH (@spcl_eth) 's Twitter Profile Photo

Closing the ML Gap: Congrats to Stefano Schuppli for receiving the Best Paper Runner-Up Award at CUG 2025!🚀A proud moment for CSCS and a big step toward more accessible, efficient ML on HPC. Find out more👉 arxiv.org/abs/2507.01880 #HPC Torsten Hoefler 🇨🇭 ETH CS Department CSCS Lugano

Closing the ML Gap: Congrats to Stefano Schuppli for receiving the Best Paper Runner-Up Award at CUG 2025!🚀A proud moment for CSCS and a big step toward more accessible, efficient ML on HPC. 
Find out more👉 arxiv.org/abs/2507.01880
 
#HPC <a href="/thoefler/">Torsten Hoefler 🇨🇭</a> <a href="/CSatETH/">ETH CS Department</a> <a href="/cscsch/">CSCS Lugano</a>
Torsten Hoefler 🇨🇭 (@thoefler) 's Twitter Profile Photo

Noam Brown (OpenAI): "I want to really emphasize if you look at just the raw NN of AlphaGo Zero, even through it was trained with MCTS, if you run at test time without MCTS, the performance is below top humans" Compute at inference is key for reasoning. youtube.com/watch?v=eaAonE…

Noam Brown (OpenAI): "I want to really emphasize if you look at just the raw NN of AlphaGo Zero, even through it was trained with MCTS, if you run at test time without MCTS, the performance is below top humans"

Compute at inference is key for reasoning.

youtube.com/watch?v=eaAonE…
Torsten Hoefler 🇨🇭 (@thoefler) 's Twitter Profile Photo

🖥️ Excited for ROSS at #SC25—where operating and runtime systems for HPC take center stage. If you’re working on bold innovations or clever solutions, we’d love to see your paper submission. Join us in Dallas to shape what’s next: sites.google.com/view/rossworks… ⚙️ #HPC #AI