Actually, not for many people. Many phone instructions say not to over
charge the battery as that reduces the useful life of the batteries. I
generally plug it into the car for the trip in to work on Mondays, and
Wednesdays, and the trip home on Fridays. This is about 3 hours of plugged
in per week. My wife plugs it into the wall at night only after it has
started beeping at her about low battery. This generally happens about
once a week, or about 8 hours of plugged in time per week.
CPU intensive tasks on a phone are just about hopeless. There is no FPU,
so multiply the crunch times for FPU intensive projects by at least one
thousand. When the phone is not in use, the CPU scales back by a large
speed factor - often around 100. The CPU speed is not that great in any
case, 500 MHz or slower for most phones. So you should expect a slowdown
of around 10000 or more for FPU intensive tasks.
For Integer intensive tasks, the slowdown is not nearly as dramatic -
figure that it is going to be about the speed of an old Pentium, and you
should be about right.
Some of the non-CPU intensive tasks are much more interesting. These could
run in the background (if developed as a native application rather than
Java), and not eat the phone battery or overheat the phone. However, the
warning here is the ones that are network intensive may not be a good fit
as many people have to pay per byte for phone data connectivity. The
network intensive tasks would also keep the radio on all of the time -
which would eat batteries quickly.
jm7
Petr Hájek
<hajek.p...@gmail
.com> To
Sent by: [email protected]
<boinc_dev-bounce cc
[email protected]
u> Subject
Re: [boinc_dev] BOINC for Mobile
Phones - please test on your Java
10/27/2009 01:23 phone
PM
Absolutely, however OVERNIGHT almost everybody has phone in charger! So it
means 8 h of crunching?
2009/10/27, [email protected] <[email protected]>:
>
> They only draw that little because on average the CPU is clocked back to
a
> very low speed. At full clock they draw much more power than when idled
> back.
>
> jm7
>
>
>
>
> Petr Hájek
> <hajek.p...@gmail
>
> .com>
To
> Sent by: [email protected]
>
> <boinc_dev-bounce
cc
> [email protected]
> u>
Subject
> Re: [boinc_dev] BOINC for Mobile
> Phones - please test on your Java
>
> 10/27/2009 01:06 phone
> PM
>
>
>
>
>
>
>
>
>
>
> AS far as I know there is NO protection simply because it is not needed.
>
> Mobile CPUs usually eats cca tens / hundreds of mAh which is still less
> that
> even Intel Atom for netbooks needs.
>
> 2009/10/27, Brandon Kuschel <[email protected]>:
> >
> > BlackBerry Curve 8330 (tested 3 times for both)
> >
> > Prime test: 99264 ms, 124606 ms, 115893 ms
> > DNA test: 16620 ms, 21718 ms, 20096 ms
> >
> > How quickly would heat become a problem with the CPU at 100%? Do the
> > processors in phones have thermal protection like computer processors?
> >
> > 2009/10/26 Petr Hájek <[email protected]>
> >
> >> Greetings everybody,
> >> after several weeks of thinking and days of hearing "Are you insane?
It
> is
> >> not possible!" I decided to create demo of mobile version of BOINC -
> i.e.
> >> BOINC for Mobile Java - J2ME / MIDP2.0+. And here it is for test. For
> >> start
> >> I have one very important thing - this is JUST A DEMO, NOT working
> >> software,
> >> so it now neither supports actuall projects, nor it operates with your
> >> BOINC
> >> accounts! It just presents idea of mobile BOINC.
> >>
> >> Program currently has 2 tests: Searching for highest prime number up
to
> >> 10.000 + DNA Comparator comparing random DNA amino acids with another
> >> piece
> >> of random DNA. For example it looks for "TACGT" or "AAGCT" and then
> tells
> >> how many times is sub-DNA in whole DNA chain. Especially DNA
Comparator
> >> may
> >> seem slow on start. That is because of the random generation of DNA,
so
> >> please be patient. Working with DNA is faster than its generation -
you
> >> will
> >> notice growing blue bar indicating progress. Yet some info for MBOINC:
> 1.
> >> DO
> >> NOT hit the Start button repeatedly, because program starts next long
> >> counting right after finishing this one. 2. Unit can not be cancelled,
> so
> >> you may return to Main Menu only after completation of whole unit.
> >>
> >> If you like idea, you may post your score with both tests. With my
Nokia
> >> E60
> >> (220 MHz CPU) I got 215175 miliseconds for primes and 344278
miliseconds
> >> for
> >> DNA Comparator. This btw. means even my ONLY phone is capable of
> comparing
> >> cca 2.500.000 amino acids of DNA per day! Imagine what could be done
> with
> >> 1.500.000.000 of phones on world today running with speed of 50-400
MHz
> >> usually! That is almost 75.000.000.000 - 600.000.000.000 MHz each day
> >> wasted
> >> without any yield for mankind...
> >>
> >> I am looking for ANY help anybody wish and could provide - primarily
of
> >> course money donation, so I may work on MBOINC as full-time
programmer,
> >> people intereted in developing of mobile versions of projects etc. But
> of
> >> course - I welcome also other ideas, proposals and cooperation offers!
> >>
> >> Even if MBOINC return only ONE unit of completed science or medical
> work,
> >> I
> >> would consider its existence success...
> >>
> >> You may download "MBOINC.zip" with JAR and JAD files just here: "
> >> http://java.wmhelp.cz/Downloads/MBOINC.zip";.
> >>
> >> Sincerely
> >> Musketeer
> >> Czech Republic
> >> _______________________________________________
> >> boinc_dev mailing list
> >> [email protected]
> >> http://lists.ssl.berkeley.edu/mailman/listinfo/boinc_dev
> >> To unsubscribe, visit the above URL and
> >> (near bottom of page) enter your email address.
> >>
> >
> >
>
>
> --
> S Pozdravem
> Petr Hájek
> _______________________________________________
> boinc_dev mailing list
> [email protected]
> http://lists.ssl.berkeley.edu/mailman/listinfo/boinc_dev
> To unsubscribe, visit the above URL and
> (near bottom of page) enter your email address.
>
>
--
S Pozdravem
Petr Hájek
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