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Date: Fri, 21 Nov 2003 16:16:41 -0800 (PST)
From: Nate Lawson <nate@root.org>
To: Lukas Ertl <l.ertl@univie.ac.at>
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cc: current@freebsd.org
Subject: Re: Updated acpi_cpu patch
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On Sat, 22 Nov 2003, Lukas Ertl wrote:
> On Fri, 21 Nov 2003, Nate Lawson wrote:
>
> > Those are what is more interesting.  Also, can you send me your sysctl
> > hw.acpi.cpu.cx_history after you've used it for a while with the maximum
> > cx_lowest setting?
>
> hw.acpi.cpu.cx_supported: C1/1 C2/1 C3/85 C3/185
> hw.acpi.cpu.cx_lowest: 3
> hw.acpi.cpu.cx_history: 0/0 1143097/0 0/0 0/0
>
> This is after 1:22h doing things like eMail, web surfing, IRC...

Ah, I see the C3 states aren't being used.  If you are playing mp3s or
have usb enabled in your kernel, they won't be used (because we can't use
them when bus mastering transfers are active.)  Try making usb a module
and not loading it and test this again.

I've been working on a change to USB to disable polling for devices when
we are attempting to sleep in idle but this may take a while.

-Nate