On 10/18/11 23:58, Amit Kulkarni wrote:
On Tue, Oct 18, 2011 at 6:36 PM, STeve Andre'<[email protected]> wrote:
If going from 1.3GHz to 800MHz saves .5 watts, the power supply isn't
the most efficient, I'd say. You ought to see several watts, though less
than 10, at a wild guess. Of course, your kill-a-watt meter might be off,
too. I saw one that was +/- 20% of its crate mates, so while I think
the product is neat, I'm not sure of their build quality.
The other think you can do is get a 'green' disk and shave off a few
watts (2.5 inch disks are better), and if the Radeon card isn't built in,
put a simpler card in (assuming a server).
Lastly, if you have multiple machines try a different power supply.
http://www.openbsd.org/cgi-bin/cvsweb/~checkout~/src/sys/kern/sched_bsd.c
I think looking at that file, maybe the CPU's cores are all awake
every rrticks_init. Is that a big reason for low power savings, each
core waking up?
That is a good question. I've not looked at that code so I can't
comment. But going from 1.3G to 800M and only seeing a .5w
drop seems wrong to me, with the power supply not being
very good.
--STeve Andre'
