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Aujourd’hui — 5 février 2025Phoronix

AMD Broadcast TLB Invalidation Patches For Linux Updated, Intel RAR Eyed Next

5 février 2025 à 15:29
One of the set of patches for the Linux kernel that we have been looking forward to but that wasn't wrapped up in time for the recent Linux v6.14 merge window was the work enabling use of the AMD INVLPGB instruction on Zen 3 CPUs and newer for broadcast TLB invalidation. This can lead to a nice performance bump in some workloads while the eighth iteration of those patches were posted overnight...

New Linux Patches Yield Up To 3.3x Faster AES-CTR Performance On AMD Zen 5 CPUs

5 février 2025 à 11:52
Google engineer Eric Biggers is known for some of his great crypto performance optimization patches to benefit the Linux kernel and his most recent patch series is yielding some very tantalizing results for AMD Zen 5 processors whether it be the Ryzen 9000 series, Ryzen AI 300 series, or EPYC 9005 server processors...
Hier — 4 février 2025Phoronix

Optimizing The Linux Kernel With PGO Can Yield ~3% Benefit For HPC Workloads

4 février 2025 à 17:37
While the Linux kernel itself may not be often viewed as a bottleneck to typical high performance computing (HPC) workloads, optimizing the Linux kernel with Profile Guided Optimizations (PGO) can prove worthwhile for those seeking maximum performance potential. A presentation this past weekend at FOSDEM 2025 is highlighting around a 3% performance gain for HPC software compiled with PGO enabled...

Ubuntu Infrastructure Woe Continues Making It A Hassle To Run The Latest Upstream Kernel

4 février 2025 à 13:42
The Ubuntu Mainline Kernel PPA for years has been a great feature for Ubuntu users to be able to easily fetch and run the newest upstream kernel whether it's the latest stable kernel version, one of the weekly release candidates, or even the very leading-edge daily Git kernel builds. Sadly for months now this service has been out of order...

Linux 6.15 Looks Like It May Try Again With EXECMEM_ROX Support

4 février 2025 à 11:43
Initially merged back for the Linux 6.13 kernel was EXECMEM_ROX support for module text on x86_64 systems. With this caching of large ROX pages it can help with lowering TLB instruction pressure and enhancing performance. But this EXECMEM_ROX support that was contributed by a Microsoft engineer ended up being reverted in the final days of Linux 6.13. The revert came due to bugs and not having any Linux x86 maintainers signing off on the code. This code has been getting into shape for trying again with the mainline kernel...
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