Open-source News

Red Hat Aiming To Address IBRS Mitigation Still Being Too Costly On Performance

Phoronix - Mon, 06/19/2023 - 23:29
Red Hat engineers are working to deal with Indirect Branch Restricted Speculation (IBRS) being too costly for mitigating Spectre V2 and Retbleed on older Intel Xeon Scalable processors. A new patch has been floated to disable IBRS when idle and is working out well at least for Red Hat Enterprise Linux 9 while isn't clear yet if it will be accepted into the upstream kernel...

SVT-AV1 1.6 Squeezes Out Even More Performance For CPU-Based AV1 Encoding

Phoronix - Mon, 06/19/2023 - 22:20
SVT-AV1 1.6 is now available as the latest version for this leading CPU-based AV1 encoder that is now enjoying 30~40% faster performance with high quality presets...

Revised Intel Shadow Stack Support May Be Ready For Linux 6.5

Phoronix - Mon, 06/19/2023 - 19:55
Intel engineers had sent in Shadow Stack support for Linux 6.4 as this feature part of Control-flow Enforcement Technology (CET) but it hit a last-minute snag during the merge window with issues raised by Linus Torvalds. Now it looks like the cleaned-up Shadow Stack code will be re-submitted for the upcoming Linux 6.5 cycle...

GCC Lands AVX-512 Fully-Masked Vectorization

Phoronix - Mon, 06/19/2023 - 18:30
Stemming from looking at the generated x264 video encode binary and some performance inefficiencies, SUSE engineers have worked out AVX-512 fully masked vectorization support for the GCC 14 development code...

Linux 6.5 Upgrading The Rust Toolchain, New Modules Added

Phoronix - Mon, 06/19/2023 - 18:12
While the Linux 6.5 merge window isn't opening for another week, Rust for Linux lead developer Miguel Ojeda has already submitted the pull request of the new Rust kernel code destined for this next kernel cycle...

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