CPU load averages - iOS 7 vs. iOS 6

Discussion in 'iOS 7' started by glacies, Sep 22, 2013.

  1. macrumors newbie

    Joined:
    May 10, 2008
    Messages:
    24
    #1
    So I've been wondering if the battery drain in iOS 7 is related to a high CPU usage. I used SysStatsLite to monitor the "load averages" of the CPU and "CPU usage" for both iOS versions after a clean install. I switched off most battery draining functions, such as Parallax.

    I don't have a picture for this but generally the CPU usage is "normal" for both iOSes when idling. Both use roughly 3 percent of CPU.

    However the load averages are drastically different. With iOS 6.1.4, it's about 0.05 to 0.30, but for iOS 7 it's about 0.80 to 1.50.

    I'm interested in seeing your load averages. If have some time on your hands could you install SysStatsLite or a similar tool and report back?

    Thanks guys!

    :D
     
  2. macrumors 6502a

    arcite

    Joined:
    Sep 6, 2009
    Messages:
    636
    Location:
    Cairo, trapped in a pyramid with my iphone
    #2
    Good investigation work.
    That would correlate to the increase battery drain.

    Also, what about wi-fi use? iOS7 does all those background updates ect... all drain battery faster.
     
  3. macrumors newbie

    Joined:
    May 10, 2008
    Messages:
    24
    #3
    The load averages I quoted are with:

    Background app refresh off
    Reduce motion
    Bluetooth off
    Static wallpaper
    System location services all off

    Wifi on
    Cellular data on (3G, no LTE)
    iCloud on and one Gmail account set to hourly fetch
     
  4. macrumors member

    Joined:
    Nov 22, 2003
    Messages:
    39
    #4
    i'm currently trying to figure out why things have started feeling laggy on my 5s running iOS 7.0.4 (eg: Waze startups feel much more sluggish than they used to). i stumbled across this thread.

    top is currently showing my load averages when the phone is pretty idle at:
    Load Avg: 0.91, 1.21, 1.26
    with a cpu usage of about 5% with most of that coming from top, itself. the load averages seem pretty high. would love to see others' load averages.
     
  5. macrumors 6502a

    Joined:
    Feb 24, 2013
    Messages:
    539
    #5
    I'm running 7.1 beta 5 and the lowest I've seen my idle usage is 3.5%, usually it fluctuates between 5-10% though. My load averages are 0.85, 1.06, 1.30. I find my battery is identical to 7.0.4.
     

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