Messages in this thread | | | Date | Wed, 14 Mar 2018 17:19:15 +0000 | From | Mark Rutland <> | Subject | Re: [PATCH v6 00/25] PM / Domains: Support hierarchical CPU arrangement (PSCI/ARM) |
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Hi Ulf,
On Wed, Mar 14, 2018 at 05:58:10PM +0100, Ulf Hansson wrote: > For ARM, the PSCI firmware interface may be managing the power to the CPUs. > Depending on the SoC, CPUs may also be arranged in hierarchical manner, which > could add another level of complexity from a CPU idle management point of view. > > PSCI v1.0+ adds support for the so called OS initiated CPU suspend mode, which > enables a more fine grained method, allowing Linux to get more control, in > regards to being energy efficient. This is typically useful for these kind of > complex battery driven platforms.
> The series is based on v4.16-rc5, but applies also as of today to Rafael's > linux-pm.git next branch. The code has been tested on a QCOM 410c dragonboard > and I except that test coverage should be increased by some more boards > shortly (for ARM64 with PSCI OSI support - only a few DT changes are needed).
Do we have any numbers to show how this affects energy efficiency?
Are there any other platforms with OSI support?
Thanks, Mark.
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