On Tue, 17 Mar 2009, Lennert Buytenhek wrote:
> On Tue, Mar 17, 2009 at 11:17:47AM +0100, Laurent GUERBY wrote:
> > > > just seen your SheevaPlug blog entry
> > > > http://www.cyrius.com/journal/debian/kirkwood/sheevaplug/nslu2-killer
> > > >
> > > > Do you have meassured power consumption numbers for the SheevaPlug vs nslu2?
> > >
> > > No, unfortunately I don't have the equipment to measure power
> > > consumption.
> > Here is what I measured with an Energy Monitor 3000, SheevaPlug on 220V:
> > 3.1W just on, Linux booted
> > 3.3W serial
> > 4.3W serial + ethernet
> > 6.0W serial + ethernet + USB HDD
> > 7.0W serial + ethernet + USB HDD + 100% cpu
> There's currently no clock gating / power management implemented at
> all in the upstream kernel, so it's likely these can be reduced a bit
> more by e.g. disabling the PCIe MAC/PHY and/or the SATA MACs/PHYs.
However any external devices on the USB port is likely to make power
measurements on the high side, and that may vary wildly from one device
to another. Arguably, power consumption at that point cannot be
attributed fully to the SheevaPlug alone.