HEADS UP: Release schedule for 2006
hartzell at kestrel.alerce.com
Wed Dec 21 13:03:58 PST 2005
Kevin Oberman writes:
> [discussion of USB/Cx level interactions clipped out...]
> If you unload the drivers, you should be to lower levels. Take a look at
> sysctl hw.acpi.cpu for detail and to see how much time is spent in each
> sleep state.
> I assume that you can unload the drivers, but my kernel has USB at this
> time. I do plan on building a kernel without USB and see if unloading is
> a workable solution. I think it should be.
I was spending all of my time in C1. After I added
to my /etc/rc.conf, I found I spent all of my time in C2.
I built a kernel w/ all of the usb devices commented out (and
eventually remembered to set usbd_enable="NO" in /etc/rc.conf, else
the modules just get kloaded...), and now I have:
hw.acpi.cpu.cx_supported: C1/1 C2/1 C3/85
hw.acpi.cpu.cx_usage: 0.00% 15.21% 84.78%
If I start usbd by hand the system starts spending time in C2. If I
stop usbd and kldunload usb, the system starts spending time in C3
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