Juan Fumero

My Devoxx BE talk is now live on the #Java YouTube channel! Discover how Project Babylon unlocks GPU programming in Java by balancing performance, productivity, and portability. Plus, a very cool demo! www.youtube.com/watch?v=_1fi...

On my way to @devoxx.com . Join me on Thursday to learn about how GPUs can be tackled from Java using Project Babylon. m.devoxx.com/events/dvbe2... Looking forward to seeing you all!

JDK 27 is out, and now you can read about the performance improvements that were included in it: inside.java/2026/09/28/p...

Java 27 / JDK 27: General Availability: mail.openjdk.org/archives/lis... Features: openjdk.org/projects/jdk... Downloads: jdk.java.net/27/ #Java27 #JDK27 #OpenJDK #Java

Running Java workloads on GPUs means rethinking the whole software stack: APIs, types, program representation, execution and scheduling. At #DevoxxBE, I’ll dive into how we're tackling this with OpenJDK Project Babylon in "Reflect, Transform, Accelerate." See you there! #Java #OpenJDK #GPU

The first part of OpenJDK’s Project Valhalla, JEP 401 (Value Objects), has been integrated into JDK 28 as a preview feature and is now available in the early-access builds. More information: openjdk.org/projects/val... #JDK28 #OpenJDK #Java

Wanna have some #Java fun on the weekend? 0. download jdk.java.net/28/ EA 10 1. jshell 2. type `value class Valhallaaaa { }` (vary number of "a"s according to taste)

The recording of my #JavaOne26 session is now available! In this talk, we explore how code reflection from the #OpenJDK Project #Babylon can be used to offload #Java methods to hardware accelerators such as #GPUs. It also includes live demos. 🚀 www.youtube.com/watch?v=92ki...

The Java Babylon team is #hiring in Nashville! Relocation (from inside the US to Nashville) is available. Know anyone who might be interested? Please send this along: careers.oracle.com/en/sites/job...

Are you working on language implementations and implementation research? Do you want to present your work to an enthusiastic crowed in Oakland? Submit your work to the VMIL Workshop! conf.researchr.org/home/splash-...

Premiere today, 21:00 CEST www.youtube.com/watch?v=ZqGS...

We’ve just published a new article proposing an extension to Babylon about how to unlock GPU Tensor Cores directly from Java, while ensuring cross-platform portability. It also shows how Java applications can be tuned for GPUs by using HAT and NVIDIA profilers 🚀 📑 openjdk.org/projects/bab...

The slide deck from my last talk at the University of Salerno on Project Babylon and the Heterogeneous Accelerator Toolkit (HAT) is now available! 🚀 🔗 cr.openjdk.org/~jfumero/pre... #java #openjdk #babylon #gpus

Building the Latest OpenJDK from Source with Docker 🔗 jfumero.dev/posts/2026/0...

Building The Regression Test Harness for the OpenJDK (jtreg) from Source: 🔗 jjfumero.github.io/posts/2026/0...

Steven Madow captured this awesome close-up shot of Artemis ll engine, using a Panasonic GH5 and a Lumix G Leica 50-200mm f/2.8-4 lens. This photo was captured at 1/8000s, f/16, and ISO 100. Beautiful (and not BS AI) petapixel.com/2026/04/03/h...

Netflix's opinion on Java👇 #java #JavaOne #netflix

It is now official: NVIDIA ❤️ Java 👇 #java #javaone

Cheat sheet for installing and running Babylon and HAT for GPUs using JDK26 #java #codereflection #gpu

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Java achieving 14 TFLOP/s on an NVIDIA A10? 🚀 Is that possible? Our new article shows a PoC of how Projects Babylon and HAT use Code Reflection to achieve near-native GPU performance for matrix-multiplication. Deep-dive here: openjdk.org/projects/bab... #Java #OpenJDK #GPU #HPC #AI

I can't quite believe that we're now announcing the eighth Programming Language Implementation Summer School (PLISS), but we are --- in May next year, if you want to learn more about programming language implementations, this is the place to come!

The fact that games such as Cyberpunk 2077 on a Pi 5 (along with the 5090) are playable is just impressive.

Heading to Redwood Shores for #JavaOne 2026 this March! 🚀 I’ll be speaking about what we are doing in project Babylon for programming, compiling and accelerating Java workloads on GPUs. Details: reg.rf.oracle.com/flow/oracle/... #java #babylon #gpus #ai

“It’s a rite of passage to run Tailscale on weird devices": How to get easier access to a jailbroken Kindle, and drop files to it, with Tailscale. tailscale.com/blog/tailsca...

How code-model and code-reflection works in project Babylon to model Java programs for Machine Learning - presentation by Paul Sandoz www.youtube.com/watch?v=jbXo...

A big thank you to all of you who attended our @devoxx.com talk on writing #GPU ready #AI models in pure #Java!!! If you wish to revisit the concepts and run the demos, here are the slides: www.slideshare.net/slideshow/wr... Give Babylon a try and share feedback with @lizeraes.bsky.social and I!

I'm teaching 𝗪𝗿𝗶𝘁𝗲 𝘆𝗼𝘂𝗿 𝗼𝘄𝗻 𝘁𝗶𝗻𝘆 𝗽𝗿𝗼𝗴𝗿𝗮𝗺𝗺𝗶𝗻𝗴 𝘀𝘆𝘀𝘁𝗲𝗺(𝘀)! again. I'll be posting the videos & tasks on YouTube too. In the first lecture, I explain what's a tiny system, why write one and show plenty of demos! 🎞️ Playlist: www.youtube.com/playlist?lis... 👉 More info: d3s.mff.cuni.cz/teaching/npr...

Hey #Java devs! At @devoxx.com, the Java Team at #Oracle is hosting an "Ask The Architects" panel. Post your questions here by Wed 23:00 UTC! Then check out the recording to hear the experts’ answers (as many as we can). 📝 Please read the questions others have suggested to prevent double-posting.

New blog post: How to Install NVIDIA Drivers and CUDA Toolkit on Oracle Linux 10 - Desktops jjfumero.github.io/posts/2025/0... #ol10 #linux #nvidia #cuda

Today's my last day at @officialuom.bsky.social ! After almost 8 incredible years, it feels like a second home. Huge thanks to everyone for the amazing memories, especially developing #TornadoVM into a world-class open-source platform. So proud of what we achieved! Excited for what's next!

Updating open WebUI to run local models with CUDA gist: gist.github.com/jjfumero/a30...

Thanks to @mukel.bsky.social for the llama2.java port and Roger Allen (github.com/rogerallen/l...) for the CUDA port, we were able to understand and shape TornadoVM for running LLMs and transformers architectures.

This is pretty cool: switching between NVIDIA Driver Module Flavors at any time. docs.nvidia.com/datacenter/t...

🎉 Java is turning 30! ☕️ On 22 May, join the celebration of three decades of innovation, code, and community! 📺 www.youtube.com/live/LHHPbI7... 🗓️ Checkout the schedule dev.java/community/ja... Don't miss it! See what's brewing next and be part of Java's joy! #JavaTurns30 #HappyBirthday

Really fun and interesting podcast with @adambien.blog. In this one we talk about the status of TornadoVM and all new changes, API design and optimisations we had to do to run LLMs more efficiently on integrated and discrete GPUs. 🎧https://airhacks.fm/#episode_346

Really interesting article about Google's hybrid approach to research by combining engineering from day one. Engineering at Google has always intrigued me. Google makes stronger research by proving it at scale. I wish Universities have similar resources. dl.acm.org/doi/10.1145/...

Guidelines to install and configure @unsloth.ai , a framework for optimising fine tuning of large language models. This guide details the configuration for Linux systems to run with NVIDIA GPUs. jjfumero.github.io/posts/2025/0... #llm #ai #linux

🚀 Learn how to accelerate performance on RISC-V CPUs using TornadoVM & vector instructions with OCK in my latest article. #Java #RISCV #Performance #OpenSource 🔗 jjfumero.github.io/posts/2025/0...

We just released a new version of #TornadoVM: v1.1.0 Highlights: - New API calls to share and optimise device buffers - Multi-task graphs fine-grained executions - Support for FP16 and mixed precision computations - Memory management improvements - Extended Math library and much more!

Preprint is now available: 🔗 research.manchester.ac.uk/en/publicati... #riscv #java #acceleration #vectorization #tornadovm

Nice. If you want to use a pre-compiled library with an existing JVM, I used it from, chriswhocodes.com/hsdis/ and builds.shipilev.net/hsdis/

Hoy voy a exponer mi trabajo como postdoc en la Universidad de Manchester y mi trayectoria como investigador en la universidad en la que estudié, La Laguna, Tenerife! Siempre un placer!

NVIDIA DGX Spark: raspberrypi-ish size with 1000 TOPS AI performance (in FP4) www.nvidia.com/en-us/produc...

Our last paper is accepted at the #RISCV Summit Europe 2025! We evaluated Java parallel workloads expressed with #TornadoVM on real RISC-V CPUs using vector instructions generated by the oneAPI Construction Kit. How cool is this? Pre-print coming soon!

Last week @kotselidis.net and myself presented the work we are doing to run and optimise Java/ #TornadoVM applications for RISC-V hardware accelerators in the #RISCV J-Group. See the slides: github.com/jjfumero/jjf... If you are interested in the topic, stay tune!

Hardware Acceleration for Java Ray Tracing: TornadoVM in Action www.youtube.com/watch?v=7q9A...