Messages in this thread | | | Date | Tue, 26 Jul 2005 10:52:29 -0400 | From | Bill Davidsen <> | Subject | Re: 2.6.13-rc3 Battery times at 100/250/1000 Hz = Zero difference |
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Brown, Len wrote: > > >>>>Digging up this patch from last month regarding C2 >>>>on a AMD K7 implies >>>>that the whole blame can be put on kernel acpi: >>>> >>>>http://marc.theaimsgroup.com/?l=linux-kernel&m=111933745131301&w=2 > > > The current Linus tree includes generic ACPI support > for deep C-states on SMP machines. (deep means higher than C1) > > I don't have any problem with people having platform specific > modules to handle platform specific features. However, if > the system really intends to support SMP ACPI C-states deeper > than C1 and the generic ACPI code doesn't support it, > then it is either a Linux/ACPI bug or a BIOS bug -- file away:-) > > I.e. The whole concept of ACPI is that you shoulud _not_ need > a platform specific driver to accomplish this.
Is anyone but me interested in low power states for servers? I have several groups of servers which are lightly utilized for at least 12 hours every day and on weekends. I currently use IDE drives so I can spin them down when idle, do logging either to a single drive or over the network whichever makes the most sense, and any drop in power use saves double, since I pay for the server power and the A/C power as well.
I haven't seen much discussion of this, but in many cases it would result in a saving, perhaps fairly large. Some environmental benefit as well, of course.
-- -bill davidsen (davidsen@tmr.com) "The secret to procrastination is to put things off until the last possible moment - but no longer" -me - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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