May 21st, 2007


Reading an electricity meter...

How do I read this?

I'm trying to measure power savings with various things,

-- making my Mac mini auto-sleep when idle,
-- using a CONFIG_NO_HZ kernel on my server,
-- powering down my DVD storage disks when idle,

But I'd like some better units to express this all in, rather than "seconds per rotation of that disc in the middle", which is all I can measure.

For what it's worth, my house spins that thing once per 34.4 seconds normally, or once every 38.5 seconds when the Mac mini is sleeping. But what does it all mean?