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Nokia Energy Profiler: why don’t we start giving hard time for the developers of power-hog applications?

Nokia S60 applications - November 28th, 2007 - Written by Tommi Vilkamo

nokia_energy_profiler.PNG

Forum Nokia just released Nokia Energy Profiler, intended to help 3rd party developers to test and monitor (and improve) their application’s power consumption in real time in the target device. I proposed last month, inside Nokia, that we should release this under Beta Labs too. We decided not to go for it, however, because the app is clearly developer-focused, while Beta Labs is consumer-focused.

Yet, I wonder: are 3rd party application developers really motivated to measure and improve their power consumption? After all, if the battery runs out quickly, Nokia gets the blame - not the developer. But what if power users and loud-voiced bloggers started using this app, increasingly giving public pressure for the developers of applications that prove to be the worst power-hogs?

I wonder.

Update: I’m not talking about 3rd party apps only, but also about apps by Nokia and our partners.

Update: you can contact the Energy Profiler team directly by sending email to energyprofiler (at) nokia (dot) com. The team is interested in how to improve usability, fixing possible bugs, and your unexpected observations about power consumption in different circumstances.

Note: for Nokia Beta Labs specific discussions, visit Nokia Beta Labs blog.

About the author Tommi Vilkamo

  • Number of posts: 391

Comments(28)

  1. Symbiatch wrote

    I for one am all up for using this kind of a tool. I understand the problems with power consumption on a mobile device and want to create as efficient applications as possible. So this utility is very welcome. Must try it soon!

  2. kirma wrote

    This is very neat. Direct access to the measurements would be even fancier, so that one could instrument his own application to track exactly the amount of energy spent on different operations (of course, assuming that only one operation is being performed at a time…).

    I must say seeing amount of power drawn by GPS in comparison to idle is enlightening, and measuring further details probably makes it quite a bit easier to estimate what kind of optimizations make the best sense for applications to make using them minimal hassle while reducing power drain, probably quite considerably. But getting all that would really be easier if one could instrument this to code being analyzed.

  3. Ricky Cadden wrote

    Point taken, I’ll try to explore a bit and start using this in any app reviews that I do over on Symbian-Guru.com.

    It would be cool to have this for RAM usage, as well, or perhaps even added, so that both RAM and battery plotted on the same graph.

  4. Helge wrote

    Hey, I find this program very useful, but for some reason it suddenly closes on my nokia n95 8gb. Before I get a chance to save the data… quite annoying, any ideas?

  5. Jaro wrote

    This could be a very useful application for common users as well. I think lots of people would be interested to find out which applications use the most of their battery power and how can they increase the battery life.

    Too bad this is 3rd edition Feature Pack only :(

  6. malaeum wrote

    Well I tend to notice when a newly installed application has an adverse effect on my battery life. It would be nice to have this tool available to the “Power User” community though.

    I would think that peer review and/or public pressure would have much more of an effect on a software development studio that just about any other source of feedback. If we are able to point to hard numbers, which this tool would provide, it means even more.

    I hope to see this tool available on Beta Labs soon.

  7. Tommi Vilkamo wrote

    You can contact the Energy Profiler team directly by sending email to energyprofiler (at) nokia (dot) com. The team is interested in how to improve usability, fixing possible bugs, and your unexpected observations about power consumption in different circumstances.

  8. kirma wrote

    @Tommi: I sincerely hope E90 developers are aware of this: E90 seems to have *huge* power consumption when the lid is open, even if screen blanking has kicked in! My measurements give 0.29 Watts for external screen active, 0.09 W when it’s blanked, but 0.60 W (no surprise here) and 0.29 W (!) respectively for lid open (naturally, internal display being used then). All of these while displaying the “ready screen” with no background activity.

    To say the least, this surprises me; I wouldn’t have expected blanked, open phone consuming over thrice the power in comparison to when it’s closed. I doubt if I’m the only one that likes to have the phone open on the table, checking it occassionally… I hope something could be done to fix this.

    The firmware in use is 07.40.1.2, hardware RA-6, Nokia E90 (02).

  9. Göran wrote

    Great little app, very useful. When developing potentially power hungry applications this will come in handy, hopefully making it possible to optimize the apps from a power perspective.

    On a general note, are they any specs/data available for Nokia phones (on a per-model basis, preferably) on power consumption/battery life in different usage scenarios?
    I have a feeling there isn’t, but maybe someone can prove me wrong…

  10. kirma wrote

    @Göran: I doubt that, but http://www.forum.nokia.com/main/resources/development_process/power_management/ has tips. Some practical details regarding performance implications of data transfer are discussed in “Recommendations for Reducing Power Consumption of Always-on Applications” article there, but details are still rather scarce. I doubt if handset-specific details would even help that much - many of them really depend on network conditions among others.

    Anyway, maybe people could collect rule-of-thumb measurements on the Forum Nokia Wiki…

  11. MikaK wrote

    Thank you for the nice feedback. An idea has been that there would be active discussion forum eg. in Forum Nokia. Additionally we could build a .jce (trace file) and screenshot website. People could share their interesting findings and learn how to make battery last longer. Graphs are also pretty - one needs to have some fun, too.

    What do you think about this?

    from Nokia Energy Profiler Support

  12. Aron wrote

    Hello its a pitty it does not support S60 3.0 FP0…

    I wonder why?

  13. MikaK wrote

    To Aron: The reason is that S60 3.0 devices do not have the chipset firmware that supports correct real-time measurements in Symbian side.

    from Nokia Energy Profiler Support

  14. danny wrote

    I use both an e70 and n95. will the next firmware update for the e70 support these correct real-time measurements? and when would such firmware be made available?

  15. danny wrote

    I use both an e70 and n95. will the next firmware update for the e70 support these correct real-time measurements? and when would such firmware be made available?

  16. ckinfo wrote

    Thanks for keeping the
    web development community up to date.

    Thanks
    chris

  17. girish wrote

    Hi, I am impressed with this power profiler, but I cannot use this on my Nokia E61, becuase it is not based on Release-1.

    Is there a way I get a version of POWER PROFILER that will run on Nokia E61 phones ?

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  20. Bram wrote

    I find this tool very very interresting as a user also (i’m no developer) but I can’t get it stable on my N82. It crashes very often and very early after starting monitoring. And even worse: When I have the monitoring running and I connect the external power adapter, the phone completely resets itself. That makes the tool completely useless.

    Will there be a new version which fixes this (i’ve read in this thread this problem is ? Or is there another tool that also makes it visible how much power the phone is consuming?

    Feel free to mail me on gnoise_@t_gmail.com.
    Thanks

  21. Always Online wrote

    Thank you for sharing.

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    e-mail
    Text Messaging
    Visual Voice Mail (feature only available on AT&T service plans as this is network

    related)

    All accessories Includes:
    ====================
    Apple iPhone
    Apple iPhone battery (Built-in)
    Apple iPhone Wall Charger
    Apple iPhone User Guide
    Apple Desktop Cradle
    Apple Ear buds

    Works with the following wireless carriers:
    ====================================
    AT&T GSM
    Cingular GSM
    T-Mobile
    Rogers Wireless
    Fido
    Vodaphone
    Orange
    O2
    any other GSM carriers in the world

    SHIPPING INFORMATION
    ======================
    All orders ship same day
    We make daily international & domestic shipments
    2 day express delivery to most countries via reliable couriers (not post office)

    Warranty & Return Policy
    =============================
    - Our products are covered by a 1 year Warranty
    - All defective products must be reported within 30
    days after you receive your order
    - Buyer is responsible to return the defective product
    back to us and we will repair it or exchange it
    accordingly

    To place an order, simply get back to us with your
    full shipping information such as:

    Name:………
    Shipping Address:……..
    Telephone number:……..

    CONTACT DETAILS.
    EMAIL :LUXUS_LTD@NETZERO.NET
    MSN:LUXUS_TECHNICS@HOTMAIL.COM
    SKYPE :LUXUS_TECHNICS

  24. toshiba battery wrote

    I tested this camera for a client. I didn’t have the light running for more than 15 minutes. The battery lasted approximately 6 hours before recharging. The LCD, however, had a few dead pixels - never saw this before. Tried returning for exchange and had to put up quite a fight. Anyone else seen this? http://www.batteryfast.co.uk

  25. dizi wrote

    thank you very much for good write

  26. battery wrote

    a good read.

  27. John wrote

    Can anyone tell me what the average power consumption is, in Watts, when taking a picture? This info would be useful to me when relating some energy usage to staff.

  28. Peter Szabo wrote

    This could be a very useful application for common users as well. I think lots of people would be interested to find out which applications use the most of their battery power and how can they increase the battery life.

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