Oliver Fromme writes: > 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 > > (8.35KWH/93.47H). > > 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
I hadn't actually done *that* (but I had run powerd -v for a while and watched). Here you go: (merlin)[9:11am]~>>while (1) while? sysctl dev.cpu.0.freq while? sleep 5 while? end dev.cpu.0.freq: 350 dev.cpu.0.freq: 350 dev.cpu.0.freq: 350 dev.cpu.0.freq: 350 dev.cpu.0.freq: 350 dev.cpu.0.freq: 350 dev.cpu.0.freq: 1051 dev.cpu.0.freq: 2102 dev.cpu.0.freq: 1401 dev.cpu.0.freq: 700 dev.cpu.0.freq: 350 > By the way, do you have an SMP system, or are you running > a kernel without SMP? "sysctl machdep.cpu_idle_hlt"? It's a uniprocessor machine, hyperthreading capable but that's disabled in the bios. (merlin)[9:12am]~>>sysctl machdep.cpu_idle_hlt machdep.cpu_idle_hlt: 1 Thanks for thinking about this! g. _______________________________________________ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "[EMAIL PROTECTED]"
