C-States configuration
hiren panchasara
hiren.panchasara at gmail.com
Wed Apr 9 17:40:33 UTC 2014
I am running -current on my T420 at r263906M
debug.acpi.acpi_ca_version: 20130823
o/p of sysctl -a | grep acpi - http://bpaste.net/show/199806/
and I have following in my rc.conf:
performance_cx_lowest="Cmax"
economy_cx_lowest="Cmax"
But I still get:
% sysctl -a | grep cx_lowest
hw.acpi.cpu.cx_lowest: C1
dev.cpu.0.cx_lowest: C1
dev.cpu.1.cx_lowest: C1
dev.cpu.2.cx_lowest: C1
dev.cpu.3.cx_lowest: C1
And I can do:
# sysctl dev.cpu.0.cx_lowest=Cmax
dev.cpu.0.cx_lowest: C1 -> C8
that tells me that Cmax is C8.
% sysctl -d dev.cpu.0.cx_lowest
dev.cpu.0.cx_lowest: lowest Cx sleep state to use
I was expecting cx_lowest to be set to C8 because of rc.conf config I have.
What am I missing here?
cheers,
Hiren
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