Updated Clock-Gating Comes For NVIDIA Kepler GPUs On Nouveau
Written by Michael Larabel in Nouveau on 26 January 2018 at 04:53 AM EST. Add A Comment
NOUVEAU --
Earlier this month a Red Hat developer managed to achieve full clock-gating for NVIDIA Kepler GPUs using the open-source Nouveau DRM driver. Today the second version of these patches were published.

Lyude Paul of Red Hat has been tackling this clock-gating support for Kepler1/Kepler2 GPUs, a.k.a. the GeForce GTX 600/700 series. The previous article covers how to enable the support, but when enabled it allows for dropping the GPU power usage by several Watts.

With the second version of these Kepler clock-gating patches, there is various fix-ups and other improvements. The code comes in at just under one thousand lines of code.

More details on the mailing list. Hopefully this code will be ready for introduction -- albeit hidden behind the config=NvPmEnableGating= switch -- for Linux 4.17.
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Michael Larabel is the principal author of Phoronix.com and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter or contacted via MichaelLarabel.com.

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