Subject: Re: Sleazy timing code
To: Wolfgang Rupprecht <wolfgang@wsrcc.com>
From: Jukka Marin <jmarin@pyy.jmp.fi>
List: port-i386
Date: 05/31/2000 20:29:19
On Wed, May 31, 2000 at 09:09:13AM -0700, Wolfgang Rupprecht wrote:
> Desktop machines consume so much power that it is hard to see the
> power savings when measuring the current of the power supply. One can
> see the savings by seeing the CPU's temperature drop, but even on a
> power hungry desktop CPU thats probably only a 10watt change out of a
> total of 150watts or so. It is hardly going to lower one's electric
> bill.
I get your point, but I think your estimate of 150 watts is quite high.
The current hard drives consume only a few watts (except for the 10000
rpm ones), something like 10 W at maximum. The motherboard can't use
more than a few watts (or the chips would burn :-), a floppy drive uses
less than a watt when idle etc. The fastest CPU's out there may use
10-20-30 watts (as they need 20-30 amp power supplies at the low voltages).
(Most power is wasted in a CRT, though....)
I *still* hope that the NetBSD kernel will halt the CPU instead of running
an idle loop. If I want to run rc5, I can do that in user mode. Let the
kernel save all the power it can. Please. ;-)
-jm