KDE's KWin Running On Wayland Gets Real-Time Scheduling

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KDE's KWin Running On Wayland Gets Real-Time Scheduling

Written by Michael Larabel in KDE on 29 September 2017 at 03:58 PM EDT. 30 Comments

When KDE's KWin is acting as a Wayland compositor, there's now a real-time scheduling policy to ensure the graphical system is always responsive.

Without the real-time scheduling, if the system is under heavy load it's possibly the graphical system could become sluggish, but the code that landed today in KWin is meant to take care of this situation.

KWin basically gets priority access to the CPU whenever needed so that all input events and rendering can be done in a time efficient manner. This new policy is being done via libcap with the CAP_SYS_NICE capability.

Unfortunately, this change didn't make it for the upcoming Plasma 5.11 release, but it will be there for 5.12. More details via Martin's blog.

30 Comments

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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 20,000 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, LinkedIn, or contacted via MichaelLarabel.com.