Latest Kernel Changes/Additions
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Radeon VII (Vega 20) Firmware Support Lands In Linux-Firmware.Git
In addition to needing a recent version of the Linux kernel and Mesa (ideally, Linux 5.0 and Mesa 19.0 if enjoying the very best performance and features) for using a Radeon VII graphics card on Linux, you also need to have the necessary firmware binaries manually installed if not using the Radeon Software for Linux driver package. Those firmware bits are now in the linux-firmware.git repository.
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Queued Linux Patches To Better Track AVX-512, Allowing For More Optimal Task Placement
After going through several rounds of patch review in recent months, a patch series providing for tracking AVX-512 usage of tasks and exporting it to user-space is poised to be part of the upcoming Linux 5.1 kernel.
As using complex AVX-512 operations can lead to lower turbo frequencies for those cores, the Linux kernel will be providing better tracking of AVX-512 usage of tasks that is readable by user-space for programs doing their own task placement. If keeping AVX-512 usage to particular core(s) and not intermixing them with non-AVX tasks, better performance can be achievable due to the differing turbo frequencies of CPUs when running Advanced Vector Extensions.
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Qualcomm FastRPC Driver Going Mainline For Offloading Tasks To The DSP
The latest Qualcomm driver working its way to the mainline Linux kernel is the FastRPC driver and should arrive with Linux 5.1.
FastRPC is an in-kernel IPC mechanism for clients to make remote method invocations across DSP/APPS boundaries. The intent of Qualcomm FastRPC is allowing tasks to be easily offloading to the DSP hardware, such as easily punting work from the Snapdragon processor to the Qualcomm Hexagon on capable SoCs.
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PulseAudio Plugin Allows For Better Bluetooth Audio Quality On Linux
Right now on most Linux distributions when using higher-end Bluetooth headphones, the low-end SBC audio codec ends up being utilized by default which is subpar for the potential audio quality of the more expensive headphones. Fortunately, there are PulseAudio modules that allow for the higher-end codecs to be used.
The low-complexity sub-band codec "SBC" is what ends up being used by default as it's native to Bluetooth and not proprietary or encumbered by patents. But newer headphones on the premium end of the spectrum also support LDAC, AptX-HD, and others with higher bit-rates yielding better audio quality.
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