Better ACPI C-state support
sepherosa at gmail.com
Thu Jan 30 02:18:21 PST 2014
I have made good progress to improve ACPI C-state support on Intel
CPUs (x86_64). All necessary bits are pushed to master. Please test.
For many Intel CPU based boxes, which only had C1, now more C-states
should be available. And for CPUs' which have ARAT, i8254 is no
longer required to enter C3+ states.
If possible, please post the bootversbose dmesg and output of 'sysctl
machdep.mwait'. For laptops, you may need to plug/unplug power cable
to get more C-states.
I am still looking for native C1 state :)
Tomorrow Will Never Die
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