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Claudia Blaas-Schenner

@claudiablaas.bsky.social
491 followers 179 following 232 posts

Passionate about Supercomputing / High-Performance Computing (HPC) - doing HPC since more than 30 years and teaching HPC since more than 10 years - grown up as a physicist - comments and opinions are my own - she/her - asc.ac.at/training

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Claudia Blaas-Schenner @claudiablaas.bsky.social · 26/09/2026
As a national HPC center it‘s so much more than just the infrastructure that we provide. We run an extensive training program, engage in international projects, and last but not least help to raise awareness…
Me giving a short talk about ASC and beyond
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Claudia Blaas-Schenner @claudiablaas.bsky.social · 23/08/2026
Time to recharge - vacation greetings from the Azores 🐬
Striped dolphin and a seagull flying together - spotted north of Faial on 23 August 2026
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Claudia Blaas-Schenner @claudiablaas.bsky.social · 07/08/2026
Happy to host EuroMPI & IWOMP 2026 at TU Wien! #HPC #MPI #OpenMP @asc.ac.at @tuwien.at @advancedcomputing.bsky.social @eurompiconf.bsky.social @openmp-arb.bsky.social
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Claudia Blaas-Schenner @claudiablaas.bsky.social · 29/06/2026
Today I opened the fortune cookie I got from JSC at ISC26 – this is for you: #ISC26 #Connecting_the_Dots #HPC #AI
Fortune cookie:
„Your potential scales infinitely.
No bottleneck can stop you today!“
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Claudia Blaas-Schenner @claudiablaas.bsky.social · 29/06/2026
Interesting find that general LLMs do better than coding-specific models when it comes to Fortran. Maybe another reason is this saying: „You start up with English and end up with Fortran.“ I love the colors that your phone is adding to the screen fotos – clear tells for no AI.
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Claudia Blaas-Schenner @claudiablaas.bsky.social · 29/06/2026
I missed this one: Nowadays it gets a new meaning when sysadmins say the perfect supercomputer would be one without users.
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Claudia Blaas-Schenner @claudiablaas.bsky.social · 29/06/2026
Impressive indeed! An opening keynote full of HPC, quantum, and neuromorphic computing – Martin Schulz knows how to rock the stage without overusing common buzzwords.
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Claudia Blaas-Schenner @claudiablaas.bsky.social · 26/06/2026
ISC26 is a wrap 🎯 See you again in 2027! It has been an amazing week and the #ASC team is heading home 🏡 #ISC26 #Connecting_the_Dots #HPC #AI
ASC team leaving from ISC26

Claudia Blaas-Schenner, Elias Wimmer, Martin Thaler, Siegfried Hoefinger, Florian Goldenberg
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Claudia Blaas-Schenner @claudiablaas.bsky.social · 26/06/2026
Friday is Workshop Day! AI on HPC: Performance Engineering, Challenges and Opportunities I was part of the Panel Discussion: Rise of HPC-Driven Al Factories Worldwide #ISC26 #Connecting_the_Dots #HPC #AI
Panelists and workshop organizers

Workshop:
AI on HPC: Performance Engineering, Challenges and Opportunities

Panel Discussion:
Rise of HPC-Driven Al Factories Worldwide
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Claudia Blaas-Schenner @claudiablaas.bsky.social · 26/06/2026
Enjoying the evening in Hamburg ⛴️⚓️ #ISC26 #Connecting_the_Dots #HPC #AI
Elbphilharmonie Hamburg
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Claudia Blaas-Schenner @claudiablaas.bsky.social · 26/06/2026
Closing Keynote „HPC in Transition“ by Jack Dongarra: HPC is being reshaped by forces beyond traditional supercomputing (the economics of AI, energy constraints, data movement, new hardware strategies, and changing expectations for scientific computing). #ISC26 #Connecting_the_Dots #HPC #AI
ISC26 closing keynote by Jack Dongarra:
„HPC in Transition“ISC26 closing keynote by Jack Dongarra:
„HPC in Transition“ISC26 closing keynote by Jack Dongarra:
„HPC in Transition“ISC26 closing keynote by Jack Dongarra:
„HPC in Transition“
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Claudia Blaas-Schenner @claudiablaas.bsky.social · 26/06/2026
I spent quite some time at the NHR Sofa, discussing about Elevating Women's Careers in HPC, Training Material Development, Examinations, Certification, Micro Credentials. And finally, I got my #WHPC t-shirt. Love the design! #ISC26 #Connecting_the_Dots #HPC #AI
ISC26 WHPC t-shirt
design by Ekaterina Zossimova (JSC)

Inspired by heterogeneous processors, the artwork interweaves a CPU and GPU with the names of influential women whose contributions have shaped our field. 

Featuring: Grace Hopper • Amanda Randles • Sarah Neuwirth • Marsha Berger • Zoe Cournia • Frauke Gräter • Xiaoxiang Zhu • Frances Elizabeth Allen • Ada Lovelace

Discover the women included
https://womeninhpc.org/women-in-hpc/celebrating-2026-iwd-whm
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Claudia Blaas-Schenner @claudiablaas.bsky.social · 26/06/2026
We were on the Community Stage with: EuroHPC Virtual Training Academy (EVITA): HPC Training for Everyone Currently EVITA has two Open Calls: 👉 Call for Modular Training Materials 👉 Call for External Reviewers 👉 evitahpc.eu #ISC26 #Connecting_the_Dots #HPC #AI
EVITA Community Stage - Speakers:
Karina Pesatova (IT4I), Yonglei Wang (LiU), Maria R. Sancho (BSC), Claudia Blaas-Schenner (ASC), Kevin Lüdemann (GWDG)
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Claudia Blaas-Schenner @claudiablaas.bsky.social · 26/06/2026
The third day started with an important question but also with some engaging discussions led by my colleague Siegfried Hoefinger in the BoF on: Quality Assurance in HPC/AI Training #ISC26 #Connecting_the_Dots #HPC #AI
Siegfried Hoefinger at ISC26 in the BoF on: Quality Assurance in HPC/AI TrainingHow are you feeling today?
At the third day of ISC26 the audience is feeling „tired“.
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Claudia Blaas-Schenner @claudiablaas.bsky.social · 24/06/2026
Nice walk through Planten un Blomen between my hotel and CCH. #ISC26 #Connecting_the_Dots #HPC #AI
Planten un Blomen, HamburgPlanten un Blomen, Hamburg
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Claudia Blaas-Schenner @claudiablaas.bsky.social · 24/06/2026
I was walking the exhibition when a guy approached me: „You don‘t know me, but I know you. I have attended several of your trainings and I would like to let you know that your trainings are amazing and I have learnt a lot from you.“ This made my day today! #ISC26 #Connecting_the_Dots #HPC #AI
Conference Center Hamburg
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Claudia Blaas-Schenner @claudiablaas.bsky.social · 24/06/2026
Today we had the MPI BoF with a full room and a lot of interest. 👉 We want to hear from you what you expect from #MPI-6! 👉 Want to shape the future of #MPI? We invite you to join the #MPI_Forum! 👉 Join us 5-9 October in Vienna: conftool.com/eurompi-iwomp-2026 #ISC26 #Connecting_the_Dots #HPC #AI
MPI BoF at ISC26MPI BoF at ISC26MPI BoF at ISC26MPI BoF at ISC26
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Claudia Blaas-Schenner @claudiablaas.bsky.social · 23/06/2026
Scenic ride across the River Elbe with ferry line 62 – public transport in Hamburg feels like vacation ⛴️⚓️ #ISC26 #Connecting_the_Dots #HPC #AI
Lotsenhaus Seemannshöft HamburgElbphilharmonie Hamburg
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Claudia Blaas-Schenner @claudiablaas.bsky.social · 23/06/2026
I really like the venue – Conference Center Hamburg #CCH is the perfect location for Connecting the Dots at ISC26. #ISC26 #Connecting_the_Dots #HPC
Conference Center Hamburg #CCH is the perfect location for „Connecting the Dots“ at ISC26.
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Claudia Blaas-Schenner @claudiablaas.bsky.social · 23/06/2026
The new #TOP500 is out with Erich Strohmaier presenting its highlights China Retakes #1 (HPL & HPCG) - With LineShine an All-CPU System The Exascale Club - Five Systems Now Break the Exaflop Barrier Industrial Systems by Eni S.p.A. rank 6th & 8th in TOP500 #ISC26 #Connecting_the_Dots #HPC #AI
TOP500 June 2026

China Retakes #1 (HPL & HPCG)
- With an All-CPU System
- LineShine
- 2.198 EXAFLOP/S (Rmax)TOP500 June 2026

The Exascale Club
- Five Systems Now Break the Exaflop BarrierTOP500 June 2026

TOP10 Computers of the TOP500
- LineShine (China) ranks 1st
- Industrial Systems by Eni S.p.A. rank 6th & 8thTOP500 June 2026

HPCG TOP10
- LineShine also ranks 1st in HPCG
- Eni‘s HPC7 ranks 5th in HPCG
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Claudia Blaas-Schenner @claudiablaas.bsky.social · 23/06/2026
Opening Keynote by Martin Schulz (TUM) HPC: A Heterogeneous Future From scaling limits to integrated architectures #ISC26 #Connecting_the_Dots #HPC #AI
Opening keynote at ISC26 by Martin Schulz (TUM)

HPC: A Heterogeneous Future
From scaling limits to integrated architectures

Prof. Martin Schulz
Technical University of Munich
ISC 2026, HamburgOpening keynote at ISC26 by Martin Schulz (TUM)

The Current State
HPC is Strategic Infrastructure

Science and engineering depend on HPC

Simulation, data, and Al are converging

Demand is growing faster than traditional scalingOpening keynote at ISC26 by Martin Schulz (TUM)

The Current State
Al Has Shifted the Center of Gravity

Diversified workloads
• Simulation
• AI & HPDA
• Heterogeneous workflows

Consequences
• Adjusted system design points
• Different operational modes

Heterogeneity is already part of almost all systems - and is here to stay.Opening keynote at ISC26 by Martin Schulz (TUM)

Closing Conclusions

Heterogeneity is inevitable
• Provides essential support to help drive performance
• Opens the door to new specialized technologies

Integration is the challenge
• Need to exploit each technology via hybrid workflows
• Requires aligned software stacks for all technologies

Software is the key
• Forms the essential bridge from domain users to technologies
• Requires major efforts across all layers
• Must lead to maintained code that can survive individual projects
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Claudia Blaas-Schenner @claudiablaas.bsky.social · 23/06/2026
Why are you here? For me this slide says it all! ❗️HPC as ❗️„The engine of human progress“ ❗️HPC, AI and Quantum Computing ❗️Energy Efficiency and Sustainability #ISC26 #Connecting_the_Dots
HPC as „The engine of human progress“
HPC, AI and Quantum Computing
Energy Efficiency and Sustainability
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Claudia Blaas-Schenner @claudiablaas.bsky.social · 23/06/2026
Rosa M. Badia is opening the conference week. Quite surprised to find me on her second slide – guess this is s good sign. #ISC26 #Connecting_the_Dots
Rosa M. Badia opening ISC26
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Claudia Blaas-Schenner @claudiablaas.bsky.social · 23/06/2026
What’s ahead for this week? Come and meet me at: 👉 MPI BoF (Wed, 24 June, 9:00) 👉 EVITA Community Meet-Up (Thu, 25 June, 13:00) 👉 Rise of HPC-Driven AI Factories Worldwide Panel @ AI on HPC Workshop (Fri, 26 June, 10:00) #ISC26 #Connecting_the_Dots
What’s ahead for this ISC26 week?
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Claudia Blaas-Schenner @claudiablaas.bsky.social · 23/06/2026
Exciting week ahead – I’m on my way to Hamburg for #Connecting_the_Dots at #ISC26
On my way to Hamburg
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Claudia Blaas-Schenner @claudiablaas.bsky.social · 11/06/2026
Excursion time! After a semester learning about #HPC, #MPI & #OpenMP I took my InterMaths students on a guided tour to finally see the hardware they were using during the labs. @asc.ac.at
InterMaths class of 2026 at ASC – in front of VSC-4
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Claudia Blaas-Schenner @claudiablaas.bsky.social · 05/03/2026
Happy to host EuroMPI & IWOMP 2026 from 7-9 October 2026 in Vienna. @asc.ac.at @tuwien.at @eurompiconf.bsky.social
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Claudia Blaas-Schenner @claudiablaas.bsky.social · 21/02/2026
Yesterday‘s course „Hands-on Explainable AI (XAI): From Data Understanding to Model Interpretation“ was a blast. A big applause to our lecturer Anahid Wachsenegger from AIT who did a great job in guiding 115 participants through the hands-on labs on the GPUs on VSC-5. #AI:AT @asc.ac.at
Participants and trainers of „Hands-on Explainable AI (XAI), 20 February 2026, online" – 46 persons (from the 118 in the Zoom meeting) are on the picture.
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Claudia Blaas-Schenner @claudiablaas.bsky.social · 12/02/2026
I‘m always happy to come to HLRS / Stuttgart for our training collaboration – „Hybrid Programming in HPC – MPI+X“ this time together with Tobias Haas and Georg Hager. Engaged participants onsite & online, good vibes in the room, and a huge construction site outside for the new HLRS building. #HPC
Hands-on labs at the „Hybrid Programming in HPC – MPI+X“ course at HLRSLooking out of the course room „Rühle Saal“ at HLRS – HLRS get‘s a new building to host their future HPC systemsLooking out of the course room „Rühle Saal“ at HLRS – HLRS get‘s a new building to host their future HPC systemsIn-person participants in the hybrid „Hybrid Programming in HPC – MPI+X“ course at HLRS
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Claudia Blaas-Schenner @claudiablaas.bsky.social · 08/02/2026
Excellent reads – paper, essay, and blog post. As we are starting procurement of our AI Factory Austria #AI:AT system soon, I especially enjoyed Glenn’s @glennklockwood.com perspective „of an HPC-turned-AI infrastructure practitioner“. When #HPC meets #AI
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Claudia Blaas-Schenner @claudiablaas.bsky.social · 22/01/2026
Access to advanced computing resources is getting easier: The #EuroHPC #Federation Platform is set to federate all AI factory supercomputers, HPC systems, and quantum systems across Europe. 👉 my-eurohpc.eu
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Claudia Blaas-Schenner @claudiablaas.bsky.social · 18/01/2026
Join us in Vienna for the: Austrian-Slovenian HPC Meeting 2026 – ASHPC26 🗓️ 7 April 2026 – internal #CE-NCCs-WG 🗓️ 8-10 April 2026 – public #ASHPC26 📍 Vienna, Austria 🔗 ashpc.eu/e/ASHPC26 Abstract submission and registration with eary-bird fees is possible until 15 February 2026.
ashpc.eu
Austrian-Slovenian HPC Meeting 2026 – ASHPC26
Austrian-Slovenian HPC Meeting 2026 – ASHPC26ASHPC26 will take place at TUtheSky, TU Wien, Vienna, Austria, 8–10 April 2026.ASHPC26 will continue the tradition of the annual Austrian HPC Meetings (201...
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Claudia Blaas-Schenner @claudiablaas.bsky.social · 07/01/2026
Today we had very special guests at #ASC - a group of students doing climate modelling with @blazgaspa.bsky.social at @univie.ac.at got to see the hardware they were using during the past semester 🌱🌍🌎🌱 @asc.ac.at @eurocc-austria.at
A group of students in front of VSC-5.
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Claudia Blaas-Schenner @claudiablaas.bsky.social · 25/11/2025
This week in Foundations of #LLM Mastery: ✨Fine-tuning on one GPU ✨Fine-tuning on multi GPUs Martin and Simeon are back with their cute Llamas and great explanations: 🦙 LLM parallelization how to chop up a Llama 🦙 LLM evaluation how to take a Llama‘s measurement When #AI meets #HPC
"Foundations of LLM Mastery: Fine-tuning on multi GPUs, 27 November 2025, online"

LLM parallelization
- how to chop up a Llama"Foundations of LLM Mastery: Fine-tuning on multi GPUs, 27 November 2025, online"

LLM evaluation
- how to take a Llama‘s measurement
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Claudia Blaas-Schenner @claudiablaas.bsky.social · 23/11/2025
Very well deserved - congratulations to the team for making 1.25 km Global Earth System Simulations possible 👏
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Claudia Blaas-Schenner @claudiablaas.bsky.social · 22/11/2025
Could not come to SC25 because I had to teach: 🎯 Parallel Programming with #MPI 🎯 One of the most iconic tools in #HPC 🎯 Don’t work hard – work in parallel 🚀 MPI processes are just like humans talking to each other – this is what Copilot gave me (back in Apr 2025) to depict MPI communication:
Parallel programming with MPI – a group of people sitting on a CPU – MPI processes are just like humans talking to each other – this is what Copilot gave me (back in April 2025) to depict MPI communication
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Claudia Blaas-Schenner @claudiablaas.bsky.social · 13/11/2025
Our Foundations of LLM Mastery course series has started this week with ✨Prompt Engineering Essentials ✨ Retrieval Augmented Generation Fine-tuning on one(multi) GPU(s) with the 🦙Llamas🦙 will follow in two weeks - there are still a few seats available! When #AI meets #HPC @asc.ac.at #AI:AT
How can you influence LLMs?

With increasing complexity, cost, quality:

=> From your hand-held devices...

1.  Prompt Engineering
2.  RAG (Retrieval Augmented Generation)
3.  Fine-tuning
4.  Train from scratch

=> ... to supercomputers / hyperscalers
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Claudia Blaas-Schenner @claudiablaas.bsky.social · 06/11/2025
TU Wien, my university and current employer, celebrates its 210th birthday today - congratulations TU Wien 💙 A great place to study and a great place to work 🎉
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Claudia Blaas-Schenner @claudiablaas.bsky.social · 04/11/2025
This week we've moved parallelism to a new level – our DL course and our OpenMP course were done in parallel – which picture is your favorite? Next week, we'll start with the November edition of our famous LLM course series – there are still seats available! When #AI meets #HPC #AI:AT #ASC
Image from "Introduction to Deep Learning, 3-4 November 2025, online"Image from "Shared-Memory Parallelization with OpenMP, 3-4 November 2025, online"
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Claudia Blaas-Schenner @claudiablaas.bsky.social · 04/11/2025
The new training season has started already a while ago and we've already covered a lot: #HPC Literacy, C++, #AI Hackathon, Trustworthy AI Webinars (in German and English), How to Run AI Workflows in MATLAB, CUDA, Debugging and Optimizing with Linaro Forge... – it's been a busy October here at #ASC.
Promotion image for "ASC-Linux + ASC-Intro, October 2025, online"
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Claudia Blaas-Schenner @claudiablaas.bsky.social · 14/10/2025
I got featured by EVITA. Happy to contribute to and improve European HPC training through EVITA 🚀
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Claudia Blaas-Schenner @claudiablaas.bsky.social · 04/10/2025
Amazing - just 1.25 kilometres - what a fantastic achievement 👏
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Claudia Blaas-Schenner @claudiablaas.bsky.social · 30/09/2025
What are you doing this week? I am spending my afternoons and nights as a remote participant at #MPIforum and #EuroMPI + #IWOMP #HPC #MPI
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Reposted by Claudia Blaas-Schenner
EVITA - EuroHPC Virtual Training Academy @evitahpc.bsky.social · 26/09/2025
EVITA presented at the All-Hands in Tallinn! 🚀 We shared our mission, training framework, and ideas for collaboration with NCCs, sparking great discussions. Thanks to all for the active exchange — excited to build on this together! #EuroHPC #EVITA #EuroCC #CASTIEL #HPC #Training #Collaboration
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Claudia Blaas-Schenner @claudiablaas.bsky.social · 24/09/2025
Striving for peak performance? Need some help? 🎓 The first autumn training events are online - ASC-Linux, ASC-Intro, C++, CUDA, DL, MPI, and more to come 🎓 Students at Austrian universities can earn ECTS asc.ac.at/training/ events.asc.ac.at/category/4/ 📸 Peak performance - greatings from Madeira
Peak performance - greatings from Madeira
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Reposted by Claudia Blaas-Schenner
Blaž Gasparini @blazgaspa.bsky.social · 15/09/2025
Great to see this article! We’re also happy to have @claudiablaas.bsky.social supporting us with teaching, running climate model simulations on an HPC system, and guiding us through ASC. Her involvement is certainly an inspiring example for our female students.
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Claudia Blaas-Schenner @claudiablaas.bsky.social · 15/09/2025
I recently gave an interview how the initiative Women in HPC drives change. #HPC #WHPC
eurocc-austria.at
“Be bold, believe in your potential, stay curious”
"Supercomputing is just for men" is a common myth. Physicist and HPC pioneer Claudia Blaas-Schenner is one of the women quietly disproving it – without fuss. In this interview, she explains why and ho...
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Reposted by Claudia Blaas-Schenner
Advanced Computing Austria ACA @advancedcomputing.bsky.social · 15/09/2025
“Be bold, believe in your potential, stay curious.” #HPC expert Claudia Blaas-Schenner on why #diversity is essential for #supercomputing – and how the initiative Women in HPC drives change. Read more: eurocc-austria.at/en/blog/be-b... @claudiablaas.bsky.social @womeninhpc.org #WomenInTech
eurocc-austria.at
“Be bold, believe in your potential, stay curious”
"Supercomputing is just for men" is a common myth. Physicist and HPC pioneer Claudia Blaas-Schenner is one of the women quietly disproving it – without fuss. In this interview, she explains why and ho...
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Claudia Blaas-Schenner @claudiablaas.bsky.social · 13/09/2025
Call for early access to #QuantumComputing resources! Open to researchers affiliated with Austrian academic or research institutions. System: IBEX from #AQT Deadline: 13 October 2025 www.uibk.ac.at/en/scientifi...
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Claudia Blaas-Schenner @claudiablaas.bsky.social · 11/09/2025
This week in ✨Foundations of #LLM Mastery ✨Fine-tuning on one GPU ✨Fine-tuning on multi GPUs Martin and Simeon rocked the floor with cute Llamas and great explanations: 🦙 LLM parallelization how to chop up a Llama 🦙 LLM evaluation how to take a Llama‘s measurement When #AI meets #HPC
"Foundations of LLM Mastery: Fine-tuning on multi GPUs, 11 September 2025, online"

LLM parallelization
- how to chop up a Llama"Foundations of LLM Mastery: Fine-tuning on multi GPUs, 11 September 2025, online"

LLM evaluation
- how to take a Llama‘s measurement
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