16 October

KDE's Plasma Wayland Session Continues Seeing More Crash Fixes

This week marked the release of Plasma 5.23 in celebrating 25 years of the KDE desktop project while celebrations didn't last long with developers already hard at work on the Plasma 5.23.1 point release, feature work for Plasma 5.24, and also improvements to the KDE Applications and KDE Frameworks.

16 October 05:27 AM EDT - KDE - Plasma 5.23.1 - 22 Comments

15 October

AMD Finally Enabling PSR By Default For Newer Hardware With Linux 5.16

With it getting late into the Linux 5.15 kernel cycle, the focus is shifting by the Direct Rendering Driver maintainers from new feature work targeting the next cycle (5.16) to instead on bug fixes. AMD sent out a pull request of new AMDGPU Linux 5.16 material this week that is primarily delivering bug fixes but one notable addition is finally enabling PSR by default for newer GPUs.

15 October 05:33 AM EDT - Radeon - PSR Default - 14 Comments
The "What If" Performance Cost To Kernel Page Table Isolation On AMD CPUs

Made public this week by CPU security researchers at Graz University of Technology and CISPA Helmholtz Center for Information Security was the research paper published "AMD Prefetch Attacks through Power and Time". The paper points to AMD CPUs suffering from a side-channel leakage vulnerability through timing and power variations of the PREFETCH instruction. The paper argues that AMD CPUs should activate stronger page table isolation by default. AMD has now published their security response where they are not recommending any mitigation changes at this time. But what if Kernel Page Table Isolation (KPTI/PTI) proves necessary for AMD CPUs? Here are some initial benchmarks showing what that performance impact could look like.

15 October 12:00 AM EDT - Software - 20 Comments

14 October

9-Way H2'2021 Linux OS Performance Comparison On Intel Xeon Scalable Ice Lake

While we recently looked at autumn 2021 Linux distributions on Intel Tiger Lake for seeing how these various latest distributions are competing on client platforms, in today's article is a look at how well the latest Linux distributions perform when using the latest-generation Intel Xeon Scalable 3rd Gen "Ice Lake" server hardware with two Xeon Platinum 8380 processors. AlmaLinux, Arch Linux, CentOS Stream, Clear Linux, Debian, Fedora, openSUSE, and Ubuntu were battling it out on this Intel reference server.

14 October 08:30 AM EDT - Operating Systems - 4 Comments

13 October

AMD Radeon RX 6600 Linux Performance

Today AMD is officially launching the Radeon RX 6600 graphics card as a trimmed down model from the Radeon RX 6600 XT that launched back in August. This new (non-XT) model has a suggested price of $329 USD and here is a look at how well this RDNA2 graphics card is performing under Linux.

13 October 09:00 AM EDT - Graphics Cards - 57 Comments
Vulkan 1.2.196 Introduces H.265 Encode Extension

Arriving back in April were the initial Vulkan Video extensions that included support for video decode of H.264 and H.265 while the initial video encode support was limited to H.264. Out today with Vulkan 1.2.196 is the new extension allowing for H.265 encoding with this new industry-standard video API.

13 October 07:27 AM EDT - Vulkan - VK_EXT_video_encode_h265 - 23 Comments
Loongson Volleys Latest Patches For LoongArch Linux Support

Chinese vendor Loongson continues working on their Linux kernel patches enabling the LoongArch processor ISA as their fork from MIPS. While early on when copying existing MIPS open-source code they were quick to call their new ISA "not MIPS", in these later patch series they continue to refer to their ISA as "a bit like MIPS or RISC-V."

13 October 05:06 AM EDT - Hardware - LoongArch - 13 Comments
DAMON Extended To Offer Physical Memory Address Space Monitoring

One of many exciting additions with the forthcoming Linux 5.15 kernel is DAMON landed as a data access monitoring framework. DAMON opens up new possibilities around proactive reclamation of system memory and other interesting features. Currently though it's limited to monitoring the virtual address space of the kernel but a new set of patches out allow for physical address space monitoring as well.

13 October 03:45 AM EDT - Linux Kernel - DAMON - Add A Comment

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