TheAnalogKid
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Posted
2003-12-11 15:45:08 » |
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Hi all,
I'm writting a 2D platform game and I think I have a memory issue. Here is the log of the game:
D:\game_dev>set VM_OPTIONS=-Xms32m -Xmx64m -Dsun.java2d.accthreshold=0 -verbose:gc -XX:+PrintGCTimeStamps
D:\game_dev>java -cp bin;lib/dom4j.jar;lib/gage_timer-1_0.jar;lib/jutils.jar;lib/jinput.jar;lib/dxinput.jar -Djava.library.path=lib -Xms32m -Xmx64m -D
sun.java2d.accthreshold=0 -verbose:gc -XX:+PrintGCTimeStamps bubblegame.BubbleGame
0.000: [GC 2111K->222K(32576K), 0.0215583 secs]
Running at 85 hertz
New Acceleration Threshold: 0
[11-Dec-2003 12:10:46 PM] INFO - loading map...
[11-Dec-2003 12:10:46 PM] INFO - Found Chunk - MPHD, reading...
[11-Dec-2003 12:10:46 PM] INFO - loading map header.
[11-Dec-2003 12:10:46 PM] INFO - FMP version : 1.0
[11-Dec-2003 12:10:46 PM] INFO - MapWidth : 300
[11-Dec-2003 12:10:46 PM] INFO - MapHeight : 80
[11-Dec-2003 12:10:46 PM] INFO - BlockWidth : 32
[11-Dec-2003 12:10:46 PM] INFO - BlockHeight : 32
[11-Dec-2003 12:10:46 PM] INFO - ColourDepth : 32
[11-Dec-2003 12:10:46 PM] INFO - BlockByteSize : 32
[11-Dec-2003 12:10:46 PM] INFO - NoOfBlocks : 1283
[11-Dec-2003 12:10:46 PM] INFO - NoOfImages : 1266
[11-Dec-2003 12:10:46 PM] INFO - Found Chunk - EDHD, skipping...
[11-Dec-2003 12:10:46 PM] INFO - Found Chunk - CMAP, reading...
[11-Dec-2003 12:10:46 PM] INFO - loading 256 entries.
[11-Dec-2003 12:10:46 PM] INFO - Found Chunk - BKDT, reading...
[11-Dec-2003 12:10:46 PM] INFO - loading 1283 blocks.
[11-Dec-2003 12:10:46 PM] INFO - Found Chunk - BGFX, reading...
[11-Dec-2003 12:10:46 PM] INFO - loading 1266 images.
4.512: [GC 2333K->1392K(32576K), 0.0330226 secs]
4.703: [GC 3502K->1938K(32576K), 0.0141814 secs]
4.902: [GC 4050K->2503K(32576K), 0.0148150 secs]
5.131: [GC 4615K->3724K(32576K), 0.0205685 secs]
5.382: [GC 5834K->4205K(32576K), 0.0115557 secs]
5.579: [GC 6315K->5444K(32576K), 0.0200933 secs]
5.769: [GC 7556K->5922K(32576K), 0.0114517 secs]
5.923: [GC 8034K->6419K(32576K), 0.0124315 secs]
6.127: [GC 8529K->7360K(32576K), 0.0159188 secs]
[11-Dec-2003 12:10:48 PM] INFO - Found Chunk - BODY, reading...
[11-Dec-2003 12:10:48 PM] INFO - Found Chunk - LYR1, reading...
[11-Dec-2003 12:10:48 PM] INFO - Map loaded succesfully.
7.127: [GC 9472K->8017K(32576K), 0.0169907 secs]
7.822: [GC 10118K->9432K(32576K), 0.0185303 secs]
8.126: [GC 11500K->10386K(32576K), 0.0125689 secs]
Number of buffers used: 3
Available accelerated memory (in bytes): 25898752
8.662: [GC 12498K->11158K(32576K), 0.0132754 secs]
Windows 2000
Ticks/Second: 1193182
Ticks/Frame: 14037
27.735: [GC 13270K->11214K(32576K), 0.0090187 secs]
72.364: [GC 13326K->11223K(32576K), 0.0037304 secs]
BufferStrategy was page flipping.
fps : 85.0
Game Duration: 112 seconds
110.193: [GC 13335K->12053K(32576K), 0.0188094 secs]
You can see in the 2 last bold lines that the GC frees about 2 megs of memory. This behavior will continue until the program terminates.
The strange thing about this is that my code doesn't create that much objects to fill 2 megs of memory regularly. The only object I create is String to display the fps BUT only when the fps value changes and I've commented out these lines of code and there is still a lot of garbage. So is someone could help me to explain this undesired behavior?
The game runs with the resolution of 640x480x16 at 85 hertzs with 3 buffers to do page flipping.
You can see the VM options I pass to the VM. I use JDK 1.4.2_02, it runs on Win 2000 with a Pentium 3 866 and a GeForce TNT 2 32 megs.
Any idea?
I really don't see what happens here.
Thanks
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