Re: Power consumption HZ250 vs. HZ1000

2005-07-27 Thread Tony Lindgren
* Pavel Machek <[EMAIL PROTECTED]> [050727 01:00]: > Hi! > > > > USB devices prevent entering C3 and any interesting powersaving, > > > try without USB... > > > > Why do USB devices prevent C3? If it was because of the timer polling > > in the root hub, I believe that should be fixed now. > > >

Re: Power consumption HZ250 vs. HZ1000

2005-07-27 Thread Pavel Machek
Hi! > > USB devices prevent entering C3 and any interesting powersaving, > > try without USB... > > Why do USB devices prevent C3? If it was because of the timer polling > in the root hub, I believe that should be fixed now. > > Or is there some other reason? Yes. UHCI zas keeps doing DMA all t

Re: Power consumption HZ250 vs. HZ1000

2005-07-27 Thread Tony Lindgren
* Pavel Machek <[EMAIL PROTECTED]> [050725 08:57]: > > USB devices prevent entering C3 and any interesting powersaving, > try without USB... Why do USB devices prevent C3? If it was because of the timer polling in the root hub, I believe that should be fixed now. Or is there some other reason?

Re: Power consumption HZ250 vs. HZ1000

2005-07-26 Thread dean gaudet
On Mon, 25 Jul 2005, Marc Ballarin wrote: > Hmm, just did. I even tried the rather minimalistic configuration below. > Still no C3. (And what seems even stranger: no C1.) there's no point to going into C1 if the C2 entry/exit latencies are acceptable. (winxp generally never uses C1 if C2 is ava

RE: Power consumption HZ250 vs. HZ1000

2005-07-25 Thread Brown, Len
yes, this approach is valid. I've done the exact same measurements for 100HZ vs 1000HZ. For currently shipping laptops, I didn't see a significant difference., Note that the quality of the instrumentation on the battery can vary widely, and so if you really want the best numbers you need to start

Re: Power consumption HZ250 vs. HZ1000

2005-07-25 Thread Bill Davidsen
Marc Ballarin wrote: Hi, I did some measurements in order to compare power drain with HZ250 and HZ1000. To measure the actual drain, I used the "smart" battery's internal measurement. (Available with acpi-sbs in /proc/acpi/sbs/SBS0/SB0/state.) No clue how accurate this is. Here some battery deta

Re: Power consumption HZ250 vs. HZ1000

2005-07-25 Thread Marc Ballarin
On Mon, 25 Jul 2005 17:53:22 +0200 Pavel Machek <[EMAIL PROTECTED]> wrote: > USB devices prevent entering C3 and any interesting powersaving, > try without USB... Hmm, just did. I even tried the rather minimalistic configuration below. Still no C3. (And what seems even stranger: no C1.) Is thi

Re: Power consumption HZ250 vs. HZ1000

2005-07-25 Thread Pavel Machek
Hi! > I did some measurements in order to compare power drain with HZ250 and > HZ1000. > To measure the actual drain, I used the "smart" battery's internal > measurement. > (Available with acpi-sbs in /proc/acpi/sbs/SBS0/SB0/state.) > No clue how accurate this is. > > Here some battery details,