Hi Rob,
what java version are you using? We have made some improvements in
jdk7 so that we don't send extra requests to the server.
Although looking at the requests it appears that the top
ones might belong to AWT, not 2D - which would explain
why you didn't see any difference when trying the Java2D
flags.
Thanks,
Dmitri
Rob Ratcliff wrote:
Hi,
I'm troubleshooting a fairly large application built on top of the NetBeans 6
platform that is causing the X-Server to chew up up a lot (30%-50%) CPU when
all it seems to be doing is refreshing a blank (no data) Map (we're using
Openmap) once a second. (I'm going verify that this week and ensure the entire
app isn't getting repainted or revalidated once a second or more.) It is
running locally and I'm running it with the -J-Dsun.java2d.pmoffscreen=true.
(I've tried false as well.) The Java process is only taking 5% or so compared
to the X-Server load.
In comparison, a similar application (uses OpenMap, but not built on NetBeans)
we have uses only 2-5% total CPU with the map populated and updating more than
once a second.
I've tried all the flags documented in the Java2D whitepaper
(http://java.sun.com/products/java-media/2D/perf_graphics.html), but I haven't
been as fortunate this time for a quick fix. (I did use the -J option to pass
the VM option through the NetBeans exec to the VM.)
(BTW, this is a Sun Blade 2000 UltraSparc III+ with a GFX-450 Graphics card,
running Solaris 8. It has 4 GB of memory and I significantly increased the
shared memory segments from the defaults.)
To get some insight into what was going on, I used the X-Server proxy, xmon, to
monitor the X-Event traffic to see what was going on and noticed that there
seems to be a lot of X-Event traffic. I was expecting more bitmap type
operations where the Swing's buffered image would be sent to the local X-Server
rather than the nearly 2000 primitive draws per minute. It is almost as if
Swing isn't double buffering.
I've also tried using the -J-Dsun.java2d.trace=<optionname>,<optionname> to
get a log of the messages, but nothing was printed. (I've tried it on Java 5 and 6.) Does
that work on the newer versions of the VM. (I need to run a test as well outside of the
NetBeans app to see if the NetBeans platform is intercepting it somewhere.)
Does anybody have some suggestions on what might be going on?
Thanks!
Rob
--------------------------xmon
summary---------------------------------------------
requests received (for about 1 minute):
code count name
1 9 CreateWindow
2 29 ChangeWindowAttributes
3 4 GetWindowAttributes
4 4 DestroyWindow
8 6 MapWindow
10 1 UnmapWindow
12 20 ConfigureWindow
14 4 GetGeometry
15 4 QueryTree
16 83 InternAtom
17 1 GetAtomName
18 129 ChangeProperty
19 11 DeleteProperty
20 326 GetProperty
23 2 GetSelectionOwner
24 317 ConvertSelection
25 4 SendEvent
36 1 GrabServer
37 1 UngrabServer
40 2 TranslateCoordinates
42 7 SetInputFocus
43 615 GetInputFocus
45 19 OpenFont
46 2 CloseFont
47 18 QueryFont
53 51 CreatePixmap
54 36 FreePixmap
55 81 CreateGC
56 2979 ChangeGC
59 2027 SetClipRectangles
60 48 FreeGC
61 2 ClearArea
62 497 CopyArea
66 1605 PolySegment
67 246 PolyRectangle
69 3 FillPoly
70 1615 PolyFillRectangle
72 490 PutImage
73 8 GetImage
78 2 CreateColormap
84 36 AllocColor
93 17 CreateCursor
94 2 CreateGlyphCursor
97 28 QueryBestSize
98 8 QueryExtension
101 1 GetKeyboardMapping
117 1 GetPointerMapping
119 2 GetModifierMapping
events received (for about 1 minute):
code count name:
6 81 MotionNotify
7 8 EnterNotify
8 8 LeaveNotify
9 11 FocusIn
10 12 FocusOut
12 11 Expose
17 1 DestroyNotify
18 1 UnmapNotify
19 2 MapNotify
21 2 ReparentNotify
22 13 ConfigureNotify
28 783 PropertyNotify
31 319 SelectionNotify
33 5 ClientMessage
errors received:
code count name
10 1 Access
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