mirror of
https://github.com/rd-stuffs/msm-4.14.git
synced 2025-02-20 11:45:48 +08:00
a421891669
When CPUs are thermal throttled, CASS tries to spread load such that their resulting P-state is scaled relatively to their _throttled_ maximum capacity, rather than their original capacity. As a result, throttled CPUs are unfairly under-utilized, causing other CPUs to receive the extra burden and thus run at a disproportionately higher P-state relative to the throttled CPUs. This not only hurts performance, but also greatly diminishes energy efficiency since it breaks CASS's basic load balancing principle. To fix this, some convoluted logic is required in order to make CASS aware of a CPU's throttled and non-throttled capacity. The non-throttled capacity is used for the fundamental relative utilization comparison, while the throttled capacity is used in conjunction to ensure a throttled CPU isn't accidentally overloaded as a result. Change-Id: I2cdabc4aa88e724252886c15040eabf40ab9150e Signed-off-by: Sultan Alsawaf <sultan@kerneltoast.com> Signed-off-by: Richard Raya <rdxzv.dev@gmail.com>
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.