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" <[email protected]> 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 [email protected] > To unsubscribe from this group, send email to > [email protected] > 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 > [email protected]. > 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 [email protected] To unsubscribe from this group, send email to [email protected] 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 the Google Groups "Android Developers" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
