saving power in a Dell Poweredge 750.
olli at lurza.secnetix.de
Thu Jan 11 09:12:29 UTC 2007
George Hartzell wrote:
> I'm setting up a Dell Poweredge 750 1U server. A friend is loaning me
> space in his rack and since his rack usage is limited by power I'd
> like to be as thrifty as possible.
> I hooked my kill-a-watt meter up and ran the machine for a couple of
> days and it uses 88 watts (3.90KWH/44.01H).
> Then I kldloaded cpufreq and enabled powerd and it still uses 88 watts
Did you verify that powerd actually reduced the CPU
frequency? What's the output from "sysctl dev.cpu.0"?
It might be enlightening to watch the following shell
loop for a while:
while :; do sysctl dev.cpu.0.freq; sleep 1; done
By the way, do you have an SMP system, or are you running
a kernel without SMP? "sysctl machdep.cpu_idle_hlt"?
Oliver Fromme, secnetix GmbH & Co. KG, Marktplatz 29, 85567 Grafing
Dienstleistungen mit Schwerpunkt FreeBSD: http://www.secnetix.de/bsd
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