Android app release: feedback thread

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Profile Benjamin
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Message 125869 - Posted: 19 Jul 2013, 13:59:04 UTC
Last modified: 22 Jul 2013, 14:32:06 UTC

Please use this thread to discuss the newly released Android application of the Einstein@Home search for radio pulsars in data from the Arecibo Observatory.

To get the application running on your Android device go to the Google Play Store, download the BOINC app, and choose Einstein@Home from the list of available projects.

To preserve battery life, minimize recharge time, and avoid the use of allotted data on cellphone plans, smartphones and tablets running BOINC will only perform calculations when they are being charged, when the battery life is above 90%, and when they are connected to wireless local area networks (WiFi). You can also modify this in the preferences tab of the app.


Cheers,
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philipp bauer
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Message 125943 - Posted: 22 Jul 2013, 17:17:30 UTC

Hello,

Installing on the HTC Wildfire S was easy. I´ve added einstein@home, seti@home and WCG. It seems to me that none of the projects got for my mobile...
I shows me the message "Nothing to do, waiting for tasks..."

Maybe i get some work over night. I am curious the see how that works.

Philipp
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Message 125945 - Posted: 22 Jul 2013, 17:39:01 UTC - in response to Message 125943.

"Nothing to do, waiting for tasks..."



Did you check to get cpu wu's for these projects in your personal settings?
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Profile Bikeman (Heinz-Bernd Eggenstein)
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Message 125946 - Posted: 22 Jul 2013, 17:45:05 UTC - in response to Message 125943.

Hello,

Installing on the HTC Wildfire S was easy. I´ve added einstein@home, seti@home and WCG. It seems to me that none of the projects got for my mobile...
I shows me the message "Nothing to do, waiting for tasks..."

Maybe i get some work over night. I am curious the see how that works.

Philipp



By default, tasks are downloaded (and results uploaded) only via a WiFi connection, not via GSM or 3G data networks. You can configure this on the "Preferences" tab of the Android App. Checking the expert feature will give you more advanced options to configure.

Cheers
HBE
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Message 125947 - Posted: 22 Jul 2013, 18:21:51 UTC

to Alex:
Get work for CPU is active in my settings

to HBE:
Yes Wifi is working, downloaded the client via wifi.

thanks
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Message 125948 - Posted: 22 Jul 2013, 18:31:14 UTC - in response to Message 125947.

to Alex:
Get work for CPU is active in my settings

to HBE:
Yes Wifi is working, downloaded the client via wifi.

thanks


Ah, it's this:


2013-07-22 18:14:55.2980 [PID=14221] [debug] [HOST#8218515] MSG(high) Binary Radio Pulsar Search (Arecibo) needs 247.96 MB RAM but only 209.15 MB is available for use.


Maybe we can lower this somewhat. The actual RAM Consumption should be somewhat lower.

Cheers
HBE

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Message 125951 - Posted: 22 Jul 2013, 18:49:25 UTC

How about battery consumption? Does the app affect phone standby time?

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Message 125954 - Posted: 22 Jul 2013, 18:56:34 UTC

I can´t tell you this right now. when i got some tasks downloaded and working I give you a feedback here.

philipp
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Message 125956 - Posted: 22 Jul 2013, 19:00:49 UTC

Great thing, I was waiting for this. Now my Sony Xperia Z could crunch like the big ones!

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Message 125958 - Posted: 22 Jul 2013, 19:13:13 UTC - in response to Message 125951.

I installed the app. It seems that the default is to crunch numbers only when the phone is connected to a charger and is at least 90% charged. There is an option to compute when on battery, but for now I think I'll leave that off.

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Message 125961 - Posted: 22 Jul 2013, 19:21:32 UTC - in response to Message 125951.
Last modified: 22 Jul 2013, 19:22:37 UTC

How about battery consumption? Does the app affect phone standby time?


Indeed, by default, BOINC on Android will only run the science apps when the device is connected to a power supply.

And yes you can override this and configure BOINC to run apps also on batteries (actually, this feature is not new, it existed for some time now to prevent rapid drain of batteries on notebooks).

Cheers
HB
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Message 125962 - Posted: 22 Jul 2013, 19:31:14 UTC

Also getting no work to be done on an htc wildfire

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Message 125963 - Posted: 22 Jul 2013, 19:34:22 UTC - in response to Message 125962.
Last modified: 22 Jul 2013, 19:35:47 UTC

Also getting no work to be done on an htc wildfire

Check the project preferences for the location the htc wildfire is on.

Claggy
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Message 125964 - Posted: 22 Jul 2013, 19:37:04 UTC - in response to Message 125963.
Last modified: 22 Jul 2013, 19:38:32 UTC

hmm I dont know what you mean, im in prefrences on the htc app what now ?

EDIT:

Getting binary radio pulsar search (arecibo) needs 247.96mb of ram and only 209.15mb are aviable

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Message 125965 - Posted: 22 Jul 2013, 19:49:32 UTC - in response to Message 125964.
Last modified: 22 Jul 2013, 19:51:53 UTC

hmm I dont know what you mean, im in prefrences on the htc app what now ?

EDIT:

Getting binary radio pulsar search (arecibo) needs 247.96mb of ram and only 209.15mb are aviable


I ment the Einstein project preferences, check that you are allowing Binary Radio Pulsar Search (Arecibo) work,

But since you're had that message, you have got Binary Radio Pulsar Search (Arecibo) selected, and you know the reason why you're not got work, see Bikeman's post earlier:

Maybe we can lower this somewhat. The actual RAM Consumption should be somewhat lower.

Cheers
HBE


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Message 125966 - Posted: 22 Jul 2013, 19:54:58 UTC
Last modified: 22 Jul 2013, 20:08:06 UTC

I really like the support for Android, but on my Galaxy S2 it seems that it needs to be charged 12h/day so the WU can finish before the deadline :(
If this stays this way, I probably won't be using it to crunch.

Is there a way to choose smaller WUs or are they already downsized for this?
edit: OK according to my latest calculations it would be even more if the calculation rate stays as it is. Hm.

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Message 125967 - Posted: 22 Jul 2013, 20:27:38 UTC - in response to Message 125966.

I really like the support for Android, but on my Galaxy S2 it seems that it needs to be charged 12h/day so the WU can finish before the deadline :(
If this stays this way, I probably won't be using it to crunch.

Is there a way to choose smaller WUs or are they already downsized for this?
edit: OK according to my latest calculations it would be even more if the calculation rate stays as it is. Hm.


That is a bit weird, in beta tests we found the Galaxy S2 to be quite a good cruncher. It should take around 9h CPU time, let's say 10 hours. The deadline is 14 days, so theoretically, 1 hr crunching time per day should be more than enough.

Reasons for slower throughput can include:

a) when crunching on more than one core and/or if the ambient temperatures are high, BOINC's overheating protection kicks in (at a configurable battery temperature, we do NOT recommend to change this threshold temperature). Crunching on just 1 core might help in this situation

b) if you device is attached to more than one project, BOINC has to divide the computation time between the projects, according to your resource share. BOINC needs good estimations about the run times of the different apps and usually it takes a few completed tasks for BOINC to improve the estimates with measurements of actual app crunching performance.

c) Insufficient chargers: When crunching, your phone will consume more power than in pure stand-by. Most phones reload via a cable plugged into a USB socket, but it does make a difference whether that cable is connected to a dedicated phone charger, or just the USB port of (say) a PC. USB ports are usually limited to provide 500 milli Ampere of current, while chargers will usually provide 1000mA or even 2000mA. So when you connect the phone to a USB port for charging, it's possible that running BOINC will still actually drain the battery, and BOINC will stop crunching when the configured minimum battery charge level is reached.

Cheers
HBE

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Message 125968 - Posted: 22 Jul 2013, 20:31:21 UTC

Installed to HTC Vivid, working just fine. Already crunching data!

Suggestion for future update; a widget!

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Message 125970 - Posted: 22 Jul 2013, 20:43:18 UTC - in response to Message 125967.
Last modified: 22 Jul 2013, 21:23:26 UTC

Hi HBE,

thanks for the suggestions, I cheked it and that's what I found out:

a) BOINC is running one task and so far nothing else at the moment, so I guess it's crunching on one core (?) I couldn't find an option to check this. The ambient room temperature is currently (I guess) about 25-28°C, but the phone or the battery itself is not warm at all, compared to the tempperature during actual charging.

b) Currently this system is only connected to Einstein@home

c) I'm using an official Samsung charger that is not connected over USB but the wall socket directly. However, it says that it's using 150mA (0.15A)... Could this be the cause? However the battery is not drained during the crunching.

edit: OK maybe I should mentioned the whole stuff, I'm not really an EE expert...
Input: 100V-240V~
50-60Hz 0.15A
Output: 5.0V - 0.7A
etc.
700mA still seems a bit low according to your definitions.

I should get a new charger I guess?

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Message 125971 - Posted: 22 Jul 2013, 22:47:29 UTC - in response to Message 125948.
Last modified: 22 Jul 2013, 22:49:34 UTC

Good, you're not sending work unnecessarily to devices that don't have enough memory. Like mine:
[WU#171173698 p2030.20121022.G194.79-01.99.C.b2s0g0.00000_814] needs 247.96MB RAM; [HOST#8219005] has 278.31MB, 139.15MB usable
[HOST#8219005] [WU#171173698 p2030.20121022.G194.79-01.99.C.b2s0g0.00000_814] WU is infeasible: Not enough memory


Now then, questions though:
In the same log it shows:
no app version available: APP#23 (einsteinbinary_BRP5) PLATFORM#12 (arm-android-linux-gnu) min_version 0
What does that mean then?

And also --although this is possibly a BOINC question-- checking the actual hostID, it says for me IP address 127.0.0.1
Why doesn't it show the correct internal IP address 192.168.1.7 as my router and the device itself show it has?

Apropos, for those wondering, this is a Samsung Gio GT--S5660, with a whopping 278MB of memory and never enough free. If only it could use the 32GB memory card. ;-)
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This material is based upon work supported by the National Science Foundation (NSF) under Grants PHY-1104902, PHY-1104617 and PHY-1105572 and by the Max Planck Gesellschaft (MPG). Any opinions, findings, and conclusions or recommendations expressed in this material are those of the investigators and do not necessarily reflect the views of the NSF or the MPG.

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