memory leak, IOkit, and ARC

i'm working on small app provides information similar coconut battery, plugs menu bar. not groundbreaking, it's more hobby me right

app relies on iokit access battery information.

after launching app, uses 10 mb of memory. noticed after week of running, memory usage 100 mb, , keeps growing @ slow rate. steps taken:

enabled arc (automatic reference counting) , adjusted code accordingly. no change.
used instruments , found iokit leaked few kb per minute - app checks battery status every 10 seconds, , each time leak memory.
disabled arc, enabled garbage collection. apparently closed leaks, app down leaking 20 kb per hour. @ point small leakage occurs every few minutes, , doesn't seem correlated particular action inside program.

@ point should stop worrying... full month of running make app use 20 mb. comparison, ran coconut battery through instruments, , turns out leak same amount of memory.

below screenshot of instruments - seems indicate leak somewhere deep within iokit. i'm aware in cases it's still user error.
below relevant snipplet of method called every 10 seconds:

code:

 - (void) updatebatteryinfo  {      // go battery entry!          ioregistryroot =           ioregistryentryfrompath(kiomasterportdefault, "ioservice:/appleacpiplatformexpert/smb0/appleecsmbuscontroller/applesmartbatterymanager/applesmartbattery");            // read out properties      tester=ioregistryentrycreatecfproperties(ioregistryroot, &properties, kcfallocatordefault,0);            // set above values!      cfnumbergetvalue((cfnumberref) cfdictionarygetvalue(properties, cfstr("cyclecount")), 9, &cyclecount);      cfnumbergetvalue((cfnumberref) cfdictionarygetvalue(properties, cfstr("currentcapacity")), 9, &currentcharge);        // more of same commands    }

i should try manually release stuff (when implementing arc, have remove retain/release cycles).

 

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  screen shot 2012-02-20 @ 3.29.32 pm.png

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do ever release dictionary?

 

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