Kernel: AMD, Allwinner, and Linux 5.16
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Linux Achieves 5.1M IOPS Per-Core With AMD Zen 3 + Intel Optane - Phoronix
Linux kernel developers have been working tirelessly to squeeze more performance out of IO_uring and the block / I/O code in general. IO_uring lead developer Jens Axboe who also serves as the Linux block subsystem's maintainer (among other roles and major contributions over the years) has used his system as a baseline for evaluating such kernel improvements. He's now moved to using AMD Zen 3 while sticking to Intel Optane storage and is seeing a mighty speed boost out of AMD's latest processors.
Rather than talking in the 3.5~3.8M IOPS per-core range for evaluating kernel improvements, he is now at over 5 million IOPS per core by upgrading to AMD Zen 3 hardware.
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Open-source Allwinner V3 ISP driver to enable blob-free camera support in mainline Linux - CNX Software
Bootlin has just submitted the first patchset for the Allwinner V3 image signal processor (ISP) driver in mainline Linux which should pave the way for a completely open-source, blob-free camera support in Linux using V4L2.
There are several blocks in an SoC for camera support including a camera input interface such as MIPI CSI 2 and an ISP to process the raw data into a usable image. Add to this the need to implement the code for sensors, and there’s quite a lot of work to get it all working.
Allwinner SDK comes with several binary blobs, aka closed-source binary, but Bootlin is working on making those obsolete, having first worked on Allwinner A31, V3s/V3/S3, and A83T MIPI CSI-2 support for the camera interface driver in the V4L2 framework (and Rockchip PX30, RK1808, RK3128 and RK3288 processors), as well as implemented support for Omnivision OV8865 and OV5648 image sensors earlier this year.
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Initial Allwinner V3 ISP support in mainline Linux - Bootlin's blog
Several months ago, Bootlin announced ongoing work on MIPI CSI-2 support for the Allwinner A31/V3 and A83T platforms in mainline Linux, as well as support for the Omnivision OV8865 and OV5648 image sensors. This effort has been a success and while the sensor patches were already integrated in mainline Linux since, the MIPI CSI-2 controller patches are on their way towards inclusion.
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Linux 5.16 To Feature More Extensible VirtIO GPU Driver With "Context Types" Addition - Phoronix
Google's work on the VirtIO DRM kernel driver around the notion of "context types" and being able to initialize different types of contexts is set to be merged for Linux 5.16 in opening up more use-cases for this driver that is an important part of the open-source virtualization graphics stack for graphics.
The existing VirtIO GPU driver is modeled around Virgl protocol usage for 3D within guest virtual machines but with this context init / context type work is around being able to accommodate additional protocols for GPU communication between the guest VM and the host.
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AMDVLK 2021.Q3.7 Driver Released With New Extensions, More Optimizations - Phoronix
AMD has pushed out one more code drop of their AMDVLK official open-source Vulkan driver before ending out the quarter.
AMDVLK 2021.Q3.7 is today's latest AMD Vulkan Linux driver release. It's quite an eventful update with two new extensions, some optimizations, and other updates.
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