The frame drop looks huge as since Gingerbread the GC is clamied to work concurrently.
On Sun, Mar 31, 2013 at 4:38 PM, Jason Polites <jason.poli...@gmail.com>wrote: > I'm 90% sure it wasn't, but I make this claim based on profiling heap > allocations and I don't think I confirmed that the process ID was actually > different. I'll confirm (or otherwise) this and post back. > On Mar 31, 2013 2:52 AM, "RichardC" <richard.crit...@googlemail.com> > wrote: > >> Is/was 2590 your process? >> >> On Sunday, March 31, 2013 8:07:50 AM UTC+1, Jason wrote: >>> >>> Hey folks, >>> >>> So I'm in the midst of creating a game and I'm hitting some occasional >>> slow down which "seems" to be a result of GC calls triggered by other >>> processes on the device. I have profiled *my* app and am 100% certain >>> there are no allocations going on while the game is running, but in certain >>> circumstances (i.e. most of the time) logcat is spewing out GC_CONCURRENT >>> freed...blah blah entries. Here's a typical output from the console: >>> >>> 03-30 23:58:58.868: DEBUG/dalvikvm(2590): GC_CONCURRENT freed 407K, 6% >>> free 8758K/9224K, paused 5ms+3ms, total 29ms >>> 03-30 23:59:05.970: DEBUG/dalvikvm(2590): GC_CONCURRENT freed 408K, 6% >>> free 8757K/9228K, paused 4ms+2ms, total 30ms >>> 03-30 23:59:13.063: DEBUG/dalvikvm(2590): GC_CONCURRENT freed 407K, 6% >>> free 8757K/9224K, paused 4ms+4ms, total 33ms >>> 03-30 23:59:20.142: DEBUG/dalvikvm(2590): GC_CONCURRENT freed 407K, 6% >>> free 8757K/9228K, paused 5ms+3ms, total 30ms >>> 03-30 23:59:27.227: DEBUG/dalvikvm(2590): GC_CONCURRENT freed 407K, 6% >>> free 8757K/9224K, paused 6ms+2ms, total 31ms >>> 03-30 23:59:34.306: DEBUG/dalvikvm(2590): GC_CONCURRENT freed 407K, 6% >>> free 8757K/9232K, paused 4ms+2ms, total 23ms >>> 03-30 23:59:41.392: DEBUG/dalvikvm(2590): GC_CONCURRENT freed 407K, 6% >>> free 8757K/9224K, paused 4ms+2ms, total 27ms >>> 03-30 23:59:48.470: DEBUG/dalvikvm(2590): GC_CONCURRENT freed 407K, 6% >>> free 8757K/9232K, paused 5ms+2ms, total 30ms >>> >>> Now I have no idea which processes are to blame, but I did notice that >>> when "other" events on the device occur it can lead to a spike in (I >>> assume) CPU usage which causes a visible drop in frame rate in the game. >>> >>> For example my wifi connection dropped out one time and the logs went >>> crazy with other processes complaining about a lost connection and trying >>> desperately to tell me about it. This caused a fairly severe jolt in the >>> game dropping the frame rate from 60fps to around 20fps for about a minute >>> while everything settled down and got on with things. >>> >>> I had noted on a previous >>> thread<https://groups.google.com/forum/?fromgroups=#!searchin/android-developers/Garbage$20collector$20suspend/android-developers/85yj9CZEqH4/YIiElemqiuoJ>a >>> statement from Dianne Hackborn: >>> >>> *"as of 1.6 such GCs in a background process can not together take more >>> than ~10% of the CPU from any foreground process that wants to run."* >>> >>> This sounds good, but I'm wondering if this is still the case as of >>> 4.2.2? I am seeing behavior that appears to indicate this may not the case. >>> >>> Is there anything I can do to ensure other processes are not using more >>> than 10% of CPU (or any number really)? Or some other >>> restrictions/priorities that might help alleviate this external resource >>> usage? >>> >>> Thanks, >>> >>> Jason. >>> >> -- >> -- >> You received this message because you are subscribed to the Google >> Groups "Android Developers" group. >> To post to this group, send email to android-developers@googlegroups.com >> To unsubscribe from this group, send email to >> android-developers+unsubscr...@googlegroups.com >> For more options, visit this group at >> http://groups.google.com/group/android-developers?hl=en >> --- >> You received this message because you are subscribed to a topic in the >> Google Groups "Android Developers" group. >> To unsubscribe from this topic, visit >> https://groups.google.com/d/topic/android-developers/yQVg0WzChko/unsubscribe?hl=en >> . >> To unsubscribe from this group and all its topics, send an email to >> android-developers+unsubscr...@googlegroups.com. >> For more options, visit https://groups.google.com/groups/opt_out. >> >> >> > -- > -- > You received this message because you are subscribed to the Google > Groups "Android Developers" group. > To post to this group, send email to android-developers@googlegroups.com > To unsubscribe from this group, send email to > android-developers+unsubscr...@googlegroups.com > For more options, visit this group at > http://groups.google.com/group/android-developers?hl=en > --- > You received this message because you are subscribed to a topic in the > Google Groups "Android Developers" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/android-developers/yQVg0WzChko/unsubscribe?hl=en > . > To unsubscribe from this group and all its topics, send an email to > android-developers+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/groups/opt_out. > > > -- -- You received this message because you are subscribed to the Google Groups "Android Developers" group. 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