↩ Accueil

Vue lecture

Python 3.14 Lands A New Interpreter With 3~30% Faster Python Code

Merged last week for Python 3.14 is a new tail-call intepreter that aims to offer significantly better performance with around 10% faster performance in PyPerformance or around a 40% speed-up in Python-heavy benchmarks. This tail-call interpeter can even outperform the current Python JIT compiler but for maximum performance benefits Python should be built with Profile Guided Optimizations (PGO)...

Union Hopes To Address KDE's Fragmented Ways Of Styling Apps

KDE/Qt apps can be styled many different ways with Qt widgets, SVG-based styling, Qt Quick, and other routes for styling of applications. That fragmentation of different ways to styling KDE apps can probe problematic for UI designs and lead to a less cohesive user experience. KDE developer Arjen Hiemstra is hoping to change that with the Union project...

New Apple Silicon Co-Maintainer Steps Up For The Linux Kernel

This week was the dramatic decision by Asahi Linux lead developer Hector Martin to step down as upstream kernel maintainer for the Apple Silicon (ARM) code following friction with other kernel developers over Rust affairs within the kernel. He still intends to contribute code to Asahi Linux's downstream kernel and Linus Torvalds has already merged the patch dropping him as an upstream maintainer. Now a new co-maintainer has volunteered to help oversee the Apple Silicon code for the mainline kernel...

Clang Thread Safety Checks Begin Uncovering Bugs In The Linux Kernel

Posted to the Linux kernel mailing list this week were two competing solutions for new LLVM Clang capability / thread safety analysis to the Linux kernel. Two developers had separately been working on implementations for the Linux kernel to make use of Clang's "-Wthread-safety" functionality. Ultimately the upstream kernel will likely settle upon the superior or unified solution while already making use of these new checks is uncovering Linux kernel bugs...

Vulkan Cooperative Matrix Merged For RDNA4 GPUs With RADV, DCC Support Inches Closer

Last week when RADV lead developer Samuel Pitoiset with Valve was commenting on the AMD RDNA4 state with the Mesa RADV driver it was noted that Vulkan cooperative matrix support, Vulkan Video encode/decode, and DCC support were still missing. But in the past week one of the items is now crossed off the list and another is continuing to see new patch activity...

GCC 15 Compiler Showing Off Nice Performance Improvements On AMD Zen 5

With the GCC 15 compiler having progressed to its final stage of development prior to the GCC 15.1 stable release in the likely March~April time frame, I've begun testing the updated GNU Compiler Collection on some test systems. Overall GCC 15 is looking nice and on AMD Zen 5 "znver5" in particular seeing some solid gains over GCC 14. Here are some initial performance benchmarks of the GCC 15 compiler.

Asahi Linux Lead Developer Hector Martin Steps Down As Upstream Apple Silicon Maintainer

Following arguments on the Linux kernel mailing list the past few days over some Linux kernel maintainers being against the notion of Rust code in the mainline Linux kernel and trying to avoid it and very passionate views over the Linux kernel development process, Asahi Linux lead developer Hector Martin has removed himself from being an upstream maintainer of the ARM Apple code...

SMT Remains Very Advantageous For 5th Gen AMD EPYC Performance

After recently re-visiting the AMD EPYC 9005 series AVX-512 performance, I followed up with some fresh SMT benchmarks looking at the performance benefits and power of toggling Simultaneous Multi-Threading on the 5th Gen AMD EPYC "Turin" hardware. Here are some fresh numbers looking at the SMT performance with AMD Zen 5 server processors.

AMD Talks Up IREE/MLIR Programming For Ryzen AI NPUs

While the AMDXDNA driver was merged for the Linux 6.14 kernel for enabling the Ryzen AI NPUs atop a mainline kernel build, there's still the user-space software needed for making use of the neural processing units found in Ryzen AI SoCs. AMD talked more about programming Ryzen AI NPUs last weekend in Belgium at the FOSDEM 2025 developer conference...

Google Interested In The Modern Intel Xe Linux Kernel Driver On Alder Lake

The modern Intel "Xe" Linux kernel Direct Rendering Manager (DRM) driver as the clean successor to the i915 driver has been an experimental option for Tigerlake and newer but only for Xe2 graphics (Lunar Lake / Battlemage) and newer is it used by default. But Google at least for their Chromebook use-cases is entertaining the idea of switching over to the Xe driver rather than the long-used i915 kernel driver for Alder Lake era hardware...

Bisecting The Linux 6.14 Performance Regression With System76 Thelio + AMD Threadripper

Yesterday I showcased Linux 6.14 Git performance worse than Linux 6.13 and 6.12 in a number of multi-threaded workloads. Due to that initial discover being on the lone AMD EPYC Turin 2P server that is always busy running through new benchmarks for future content as well as I am being persistently short on time and constantly under pressure due to the state of the web/ad industry, I didn't expect to get around to digging deeper into the problem in the near-term. But as I ended up being able to reproduce some of the regressions on a System76 Thelio Major workstation at my desk with the still mighty powerful Ryzen Threadripper 7980X, I was able to turn around a quick bisect...
❌