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Linux 6.12 introduces scheduler extensions—enabling custom schedulers via eBPF! 🚀 Learn how we used this for concurrency testing in OpenJDK, stopping & starting threads inside the kernel. Don't miss the #FOSDEM2025 session with Johannes Bechberger. 🔗 sap.to/6010xbQXp.

Last call for the scheduler contest at FOSDEM25, submit your policy idea (the weirder the better) or scheduler till 11am: mostlynerdless.de/blog/2025/01/2…

Learn what method and class tagging in the OpenJDK JFR implementation is and how it works under the hood: mostlynerdless.de/blog/2025/02/1…

Learn how to write a custom Linux scheduler for concurrency fuzzing with sched-ext and hello-ebpf in this week's blog post.: mostlynerdless.de/blog/2025/02/2…

Johannes Bechberger, JDK developer and awesome engineer at SapMachine (the JDK team of SAP) x.com/i/broadcasts/1…

Hello eBPF: Concurrency Testing using Custom Linux Schedulers (and Java!) mostlynerdless.de/blog/2025/02/2…

Join me to see how we can use an instrumenter that instruments instrumenters in a programmatic way (maven plugin included): mostlynerdless.de/blog/2025/03/1…

Learn how to create a scheduler that makes your system run fast when you shout at it using sched-ext and hello-ebpf in this week's blog post: mostlynerdless.de/blog/2025/03/2…

I just released the newest version of ap-loader, a platform independent wrapper for async-profiler. The new versions supports async-profiler 4.0: github.com/jvm-profiling-…

JEP 509 ("JFR CPU-Time Profiling (Experimental)") added. See openjdk.org/jeps/509

I finally got ap-loader published on maven central: central.sonatype.com/artifact/me.be…

I just released the newest version of my Java profiling plugin for IntelliJ IDEA, a JetBrains IDE, it includes the newest version of async-profiler: plugins.jetbrains.com/plugin/20937-j…

I'll be speaking with David Kiefer next Wednesday on writing Linux schedulers in Java at JUG Karlsruhe @[email protected] : jug-karlsruhe.de/content/sounds… Come by to see the first idle game scheduler in action (a scheduler where you yourself schedule the tasks in form of a cookie clicker style game)

In this weeks blog post I'll show you how develop and run a CAP Spring-Boot Java app locally on your Android phone using Termux and VSCode: mostlynerdless.de/blog/2025/05/0…

JFR is getting a new method sampler that walks stacks at safepoints in JDK 25. Learn all about the new sampler in this week's blog post: mostlynerdless.de/blog/2025/05/2…

Well...

Learn how to install and run Garden Linux on your smartphone using Termux and proot-distro in this week's short blog post: mostlynerdless.de/blog/2025/06/0…

It finally happened :)

I just updated the JFR events collection (sapmachine.io/jfrevents). It now includes JDK 25 and JDK 26 with my CPUTimeSample event:

Learn all about Java 25's new CPU-time profiler and why it matters in this week's blog post: mostlynerdless.de/blog/2025/06/1…