----- Original Message ----- From: Theodore Ts'o <[EMAIL PROTECTED]> Date: Monday, August 1, 2005 4:42 pm Subject: Re: Power consumption HZ100, HZ250, HZ1000: new numbers
> On Mon, Aug 01, 2005 at 12:18:18PM -0400, James Bruce wrote: > > > > The tradeoff is a realistic 4.4% power savings vs a 300% increase > in the > > minimum sleep period. A user will see zero power savings if they > have a > > USB mouse (probably 99% of desktops). On top of that, we can > throw in > > Con's disturbing AV benchmark results (1). As a result, some of > us > > don't think 250HZ is a great tradeoff to make > _for_the_default_value_. > Most laptops (including mine, a Thinkpad T40) use a PS/2 mouse. So in > the places where power consumption savins matters most, it's usually > quite possible to function without needing any USB devices. The 90% > figure isn't at all right; in fact, it may be that over 90% of the > laptops still use PS/2 mice and keyboards. > > - Ted Also, my understanding was that when we properly support usb suspend, this won't be an issue anyway for much usb hardware. I think it's possible to put some mice to sleep when there isn't any motion and then wakeup later. 4.4% savings may not be much, but these things do add up. For a laptop's workload, I think this is worth it. Thanks, Adam - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
