Hi!
> In short, we have novel hardware: we can have our screen on, and suspend
> the processor to RAM, and use a half a watt. We can have our wireless
> forwarding packets in our mesh networks, with the processor suspended,
> consuming under 400mw (we hope 300mw by the time we ship). Both on, and
> we're still under one watt.
>
> For keyboard activity, human perception is in the 100-200 millisecond
> range; for some other stuff, it is even less much than that. So that's
> the necessity; now the invention.
>
> I've done a straw pole among kernel gurus at OLS and elsewhere on how
> fast Linux might be able to resume. I've gotten answers of typically
> "one second".
>
> But, on other platforms (see attached), I have data I've measured myself
> showing Linux going from resume from RAM to *scheduling user level
> processes* 100 times faster than that, on a wimpy 200mhz ARM processor.
> Yes, Matilda, Linux can, on non-braindead hardware, resume all the way
> to scheduling user processes in 10 milliseconds on a 200mhz processor.
2.4 and 2.6 are *very* different here. You'll probably need to optimize freezer
in 2.6 a bit...
Pavel
--
Thanks for all the (sleeping) penguins.
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