Messages in this thread | | | Date | Sat, 12 Apr 2014 00:05:17 +0200 | From | Pavel Machek <> | Subject | Re: Cryogenic: Enabling Power-Aware Applications on Linux |
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Hi!
> >> Cryogenic is the result of my Master's Thesis, completed at the Technical University > >> of Munich under the supervision of Christian Grothoff. You can find more information > >> about Cryogenic at https://gnunet.org/cryogenic > > > > Do you have any measurements how much power it actually saves? > > Yes, it depends on the device, but we have demonstrated power > savings for two different types of devices using two different > measurement setups performed by two independent groups. Some > of the measurements are available on the website, the second > set should become available "soon" (but we can already say that > for the scenario we measured, the savings are in the same range > as before).
The video I seen.... AFAICT the savings are in <10% range?
> > "I'd like to download my mails from IMAP server in next 30 > > minutes. But... it would be better done when I'm on 3G network with > > good signal (0.01W transmit power used for 3 seconds) than on GPRS > > with poor signal (2W transmit power for 4 minutes)..." > > Well, that's not quite what the API would allow, especially as it > is obviously hard to predict that a different network will become > available.
Actually... its a phone so it probably has GPS :-). But I'd guess that even simpler logic, "if UMTS was available in last hour, it is likely to be available within hour" would work ok.
I seen demo on UDP packets... delayed TCP socket write is probably easy, but would API allow delayed TCP connect?
Hmm, but the API needs redoing, anyway, fcntl()?
Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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