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Kernel and Graphics: USB, Games, Zink and Mesa

Submitted by Roy Schestowitz on Friday 14th of January 2022 01:07:56 PM Filed under
Graphics/Benchmarks
Linux
  • USB Changes For Linux 5.17: Overdue Xen pvUSB To DWC3 Multi-Stream Transfer - Phoronix

    Landing this week as part of the various subsystems overseen by Linux's second-in-command Greg Kroah-Hartman were the USB changes for Linux 5.17.

    There were many USB (and Thunderbolt) changes for Linux 5.17 such as Synopsys' DWC3 "Multi-Stream Transfer" feature, Xen pvUSB making its debut after being out-of-tree since its start in ~2008, various power management changes, and more. Some of the USB subsystem highlights for 5.17 include:

    - Multi-Stream Transfer (MST; not to be confused with DisplayPort's MST - Multi-Stream Transport) for the Synopsys DesignWare Core SuperSpeed USB 3.0 controller. Synopsys added Multi-Stream Transfer to improve bulk streams performance for SuperSpeed and SuperSpeed Plus with their DWC3 controller with this latest Linux kernel driver code. Synopsys has found this Multi-Stream Transfer mode for DWC3 can lead to a "significant performance improvement" for UASP transfers.

  • Linux 5.16 speeds up games and boosts system performance - Market Research Telecast [Ed: Automated translation]

    Linux 5.16 took a week longer than originally expected. Linus Torvalds decided to give the kernel a little more time to mature. The triggers were not problems or alarming test results, but simply the concern that testing could be too short due to the holidays and the week “between the years”.

  • Mesa's "Copper" Is A Step Closer To Being Brazed - Phoronix

    A draft merge request has been opened for landing "Copper" within Mesa.

    Copper came about over the past year by Red Hat's Adam Jackson with participation from Mike Blumenkrantz and others. This DRI interface extension can lead to much greater efficiency for Zink, the OpenGL on Vulkan implementation, and native WSI handling for it. Copper would help improve upon the Gallium3D architecture and provide substantial benefits for Zink.

    On Thursday Blumenkrantz opened the draft MR for merging Copper with hopes for getting the code into shape for mainlining but not necessarily in the immediate future. Pushing Copper out as more of a longer-term effort is it depending upon other open merge requests such as Zink external memory support, sparse textures, and other bits.

  • Leaks

    It’s come to my attention that there’s a lot of rumors flying around about what exactly I’m doing aside from posting the latest info about where Jason Ekstrand, who coined the phrase, “If it compiles, we should ship it.” is going to end up.

    Everyone knows that jekstrand’s next career move is big news—the kind of industry-shaking maneuvering that has every BigCo from Alphabet to Meta on tenterhooks. This post is going to debunk a number of the most common nonsense I’ve been hearing as well as give some updates about what else I’ve been doing besides scouring the internet for even the tiniest clue about what’s coming for this man’s career in 2022.

    [...]

    Unfortunately, this turned out to be bogus, no more than chaff deployed to stop us from getting to the truth because we were too close. Later, while I was pondering how buggy NVIDIA’s sparse image functionality was in the latest beta drivers and attempting to pass what few equally buggy CTS cases there were for ARB_sparse_texture2, I stumbled upon the obvious.

    It’s so obvious, in fact, that everyone overlooked it because of how obvious it is.

    Jason has left Intel and turned in his badge because he’s on vacation.

    As everyone knows, he’s the kind of person who literally does not comprehend time in the same way that the rest of us do. It was his assessment of the HR policy that in order to take time off and leave the office, he had to quit. My latest intel (no pun intended) revealed that managers and executives alike were still scrambling, trying to figure out how to explain the company’s vacation policy using SSA-based compiler terminology, but optimizer passes left their attempts to engage him as no-ops.

»

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