Re: CVS commit: src/sys/dev/acpi

[Christoph Egger <Christoph_Egger%gmx.de@localhost>]

On 09.08.10 07:00, Jukka Ruohonen wrote:
> Module Name:  src
> Committed By: jruoho
> Date:         Mon Aug  9 05:00:24 UTC 2010
> 
> Modified Files:
>       src/sys/dev/acpi: acpi_cpu_cstate.c
> 
> Log Message:
> Downgrade the currently supported maximum C-state to C1. There appears to be
> timer-related interrupt issues also in C2. With C1 it is guaranteed that
> acpicpu(4) will not cause any slowdowns due stalled local APIC timer.

Before you switch into C3-state you need to move away from using
the local APIC timer. You can use any external timer such as HPET or
PIT. You use local APIC timer after wakeup again.

Christoph