Re: Hosttime?
Re: Hosttime?
- Subject: Re: Hosttime?
- From: Jeff Moore <email@hidden>
- Date: Tue, 11 Feb 2003 17:39:44 -0800
The frequency of the host time base doesn't change when the processor
speed cycles or changes.
Mac OS X does support the power management functions. The controls are
in the Energy Saver preference panel. As far as I can tell, they only
show up on PowerBooks.
One thing to point out is that Mac OS X is really good at making use of
idle time to do useful things, so the CPU goes idle much less often
than it did under Mac OS 9. This in turn keeps the power management
stuff from kicking in as often.
On Tuesday, February 11, 2003, at 03:25 PM, Kurt Revis wrote:
On Tuesday, February 11, 2003, at 01:53 PM, James Chandler Jr wrote:
In Macs which feature "Processor Cycling" or "Reduce Processor Speed"
options, is the HostTime rate modulated when these features kick in?
A related question-- in OSX, are the "Processor Cycling" and "Reduce
Processor Speed" features still supported, or are they now illegal?
I honestly have no idea what happens under OS 9. As far as I know
those features are not user-configurable under OS X--I've never seen
them in the Energy Saver preferences. I don't know if they are still
happening at the lower levels, or not. Given the decrease in battery
life on X compared to 9, I suspect not.
Since so much of the system depends on this timing source (including
the kernel scheduler), I would be really surprised if its rate ever
changed. But feel free to prove me wrong!
--
Kurt Revis
email@hidden
_______________________________________________
coreaudio-api mailing list | email@hidden
Help/Unsubscribe/Archives:
http://www.lists.apple.com/mailman/listinfo/coreaudio-api
Do not post admin requests to the list. They will be ignored.
--
Jeff Moore
Core Audio
Apple
_______________________________________________
coreaudio-api mailing list | email@hidden
Help/Unsubscribe/Archives:
http://www.lists.apple.com/mailman/listinfo/coreaudio-api
Do not post admin requests to the list. They will be ignored.