cvs commit: src/sys/dev/acpica acpi_cpu.c

[John Baldwin]

On Wednesday 17 March 2004 04:49 pm, Nate Lawson wrote:
> njl         2004/03/17 13:49:47 PST
>
>   FreeBSD src repository
>
>   Modified files:
>     sys/dev/acpica       acpi_cpu.c
>   Log:
>   Fix border error to allow systems that specify 100 for latency also use
>   C2 and 1000 to use C3.
>
>   Submitted by:   Bruno Ducrot <ducrot at poupinou.org>
>   Tested by:      Scott Lambert <lambert at lambertfam.org>

Hmm, the BIOS on my laptop uses those values when the C states are disabled 
(according to the BIOS text).  That is, my BIOS lets me turn C2 and C3 on and 
off.  When turned on, it uses the values 1 and 85 for the latency, and when 
off it uses 100 and 1000.  Note that the kernel never uses C3 on this machine 
by the way with these latencies:

hw.acpi.cpu.cx_supported: C1/1 C2/1 C3/85

-- 
John Baldwin <jhb at FreeBSD.org>  <><  http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve"  =  http://www.FreeBSD.org