Intel SST Core-Power Support Ready For Linux 5.6
Written by Michael Larabel in Intel on 25 January 2020 at 08:15 PM EST. Add A Comment
INTEL --
Earlier this month I wrote about Intel SST Core-Power patches as part of Intel's Speed Select's functionality for more control over per-core power/frequency behavior based upon the software running on each core. The "core-power" profile support appears ready now for Linux 5.6.

While Intel Speed Select Technology support was added to Linux last year as one of the new features with Cascade Lake, the "Core-Power" (or SST-CP) profile hadn't been wired up in full to this point. Intel SST-CP allows for dealing with per-core priorities when encountering power constraints.
Intel SST—Core power (CP or core-power):
An Interface that allows user to define per core priority. This defines a mechanism to distribute power among cores when there is a power constrained scenario. This defines a class of service configuration. Each CPU core can be tied to a class of service and hence an associated priority.

These patches, what were talked about earlier in January, are now queued in linux-platform-drivers-x86's for-next branch making the SST-CP support material slated to land in Linux 5.6. The Linux 5.6 kernel should in turn be released as stable in April.
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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 or contacted via MichaelLarabel.com.

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