New IOWait Boosting Patches For Intel P-State, Schedutil

Written by Michael Larabel in Hardware on 3 September 2016 at 03:16 PM EDT. 2 Comments
Linux power management and ACPI maintainer Rafael Wysocki has published a set of new "iowait boost" patches for P-State and Schedutil that he's looking to see benchmarked by interested parties.

If you didn't read the article about the IOWait Boost patches from a few weeks ago, see P-State Algorithm Change, Schedutil IOWait Boosting.

With the four patches published on Friday, there is iowait boost support for the Intel P-State scaling driver and CPUFreq's Schedutil governor.

The four patches can be found on the kernel mailing list. I'll try to find the time this weekend to patch a test kernel and see how these patches are doing and if they affect the performance for any of our workloads of interest. The algorithm change for P-State should be particularly interesting.
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Michael Larabel is the principal author of 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 automated benchmarking software. He can be followed via Twitter, LinkedIn, or contacted via

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