cvs commit: src/sys/conf files src/sys/modules/acpi/acpi Makefile src/sys/dev/acpica acpi_battery.c acpi_smbat.c acpi_smbus.h acpiio.h

[Nate Lawson]

Dag-Erling Smørgrav wrote:
> Nate Lawson <nate at root.org> writes:
> 
>>Dag-Erling Smørgrav wrote:
>>
>>>Try running powerd with a 5000 ms polling interval.  With the default
>>>of 500 ms, it never seems to stabilize, but keeps oscillating wildly
>>>in the 75-300 MHz range on my Dell Latitude D600.
>>
>>That is bad for performance.  It can then take up to 10-15 seconds to
>>promote back to 100% CPU when your system becomes busy.
> 
> 
> It's not as bad for performance as me tossing the laptop out the
> window in frustration because powerd keeps changing the CPU frequency
> and the system freezes for just a moment every time it does.

Some drivers require interrupts disabled, but it should be for a very 
brief time.  acpi_perf usually generates an SMI so that may be slow for 
your BIOS.  Are you getting messages on console about the change timing out?

-- 
Nate