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deiruch

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About deiruch

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  1. Classic vs. Desktop runtime

    Unfortunately I personally cannot reproduce the problem on any of my test computers. FPS in the reported cases is consistently high, so it's not a general lack of performance. I was posting because I was interested in more in-depth information about the various runtimes. Is that information available somewhere?
  2. Classic vs. Desktop runtime

    It's the other way round. It's the Desktop Runtime that doesn't work that well for some people.
  3. Hello everyone I'm the developer of a free online multiplayer Tetris game. Some of the more advanced players complained a bit about jitter in our game. I'm not talking about multi-second stalls, but barely measurable stops in the millisecond range. First I thought that it was GC related, but couldn't find any evidence for it. I set the GC ratio to 10%. But some players said that the problem only appears on multi-core systems and can be solved by changing the affinity of the process to lock it to a single core. Then I changed the runtime from "Desktop" to "Classic". The beta testers told me that it improved the situation for them... The documentation states: Is there more information available on these runtimes? Any ideas on how to measure and tune the behaviour of the desktop runtime? Can multiple threads run in parallel with the Classic Runtime or will threads be multiplexed onto a single core? Any other ideas on how to reduce the jitter? Cheers, Simon Btw: For those interested, you can find the game here: http://gewaltig.net/
  4. You were spot on with your guess: I compiled the class files without line numbers. After changing the javac options it works as advertised. Thanks! BTW: Maybe you could add a warning to the compiler when the main class file was generated without line numbers and JET was asked to output line numbers in stack traces to avoid this problem in the future?
  5. Hi everyone I'm collecting crash logs for my game. A typical stacktrace looks like this: ... at net.gewaltig.cultris.manager.rooms.Room.getRecordedRound(Room.java:190) at net.gewaltig.cultris.gui.menu.GameOnlineChallenge.updateDT(GameOnlineChallenge.java:190) at net.gewaltig.cultris.gui.OpenGLGUI.updateDT(OpenGLGUI.java:190) at net.gewaltig.cultris.tools.UpdateManager.update(UpdateManager.java:190) ... As you can see it contains the proper package names, the correct class names and even the method names are correct. But the line numbers are off. This is expected in the default configuration. However, I enabled the GENSTACKTRACE and -Djet.stack.trace compiler/runtime options. The documentation says this about these options: And here's the relevant part of the project file: %%Excelsior JET v7.6 project file -compilewithfixedheap- -genstackalloc+ -genstacktrace+ -global+ ... -jetrt=Desktop -jetvmprop=-Dorg.lwjgl.util.NoChecks:true -Djet.jit.fast -Djet.jit.disable.resolution -Djet.gc.heaplimit:268435456 -Djet.gc.ratio:10 -Djet.stack.trace ... Is this expected? Having full stack traces would really help solving some issues... Cheers, Simon
  6. NullPointerException in String.format

    I now also ran our game with AppVerifier and with debug DLLs with all checks enabled. The only thing I could find were some memory leaks in the Intel OpenGL drivers...
  7. NullPointerException in String.format

    Ok, I have some new data from the field. The newest release, compiled with 7.6MP2 still shows the same symptoms: Random "impossible" exceptions from all over the place. But doesn't happen often or regularly and on a variety of machines (different Windows versions, different CPUs, ...). The latest crash was a NullPointerException in a method that only accesses initialized constants and an initialized local array.
  8. Using another installer is an option I'm working on. Thanks for the reply. I hope that you'll change it eventually - all it would take is an if(...) somewhere in the code and commenting out a message box.
  9. I noticed that there are other posts in the forum about the same issue and (sadly) they got no replies too. How are other users working around it?
  10. How can I disable the warning that JetPack II-installers show when an application is already installed? Also, how can I stop a JetPack II-installer from adding a second entry in the Add/Remove programs list when a previous version was already installed? If it's not possible to do this with the current version, do you have an ETA? Some users are worried about the warning and don't know what to do (either they ignore your installer-warning or they uninstall, where they fear that they might lose all their settings). I know that I should/could use updates, but I can't because we deployed dozens of different versions of our application and creating updates from every version to the current version every time is unfeasible. I'm also aware that the uninstaller of the second installation might leave some registry keys behind. In a perfect world the installer would detect a previous installation and then update that existing installation, without asking for the installation directory a second time.
  11. NullPointerException in String.format

    Sadly not. We collect anonymized crash reports and 99% of the users don't enter contact information. Also there is no fixed set of machine where it crashes - it crashes sometimes on machines where we know that it ran fine for the last few months. Then, a crash out of nowhere, and after that no more crashes from that machine. "My app?" I couldn't find an attached app. If you meant "your app": I tested with both, the -Xcheck:jni and the (Oracle-recommended) -XX:+CheckJNICalls options to no avail. It didn't report errors. The beta release notes of the next contain bits about stability-related changes. We'll see if future versions behave differently.
  12. NullPointerException in String.format

    Thanks for the article. I believe I read some similar stories on the Excelsior Blog or somewhere in the support section. I understand that many people think your product is buggy when in fact they write code with race-conditions... Thank you for still being so nice after all this time That's exactly the problem: Reproducing the bug reliably. So far I couldn't find a way to do that. The game works with Oracles JVM on Windows XP to 7, all 32 bit. It works on OS X 10.6. The only weird bug reports come from the Excelsior JET builds. I tested with JRockit too, but wasn't able to get it to crash (but I'm also unable to crash it with Excelsior - so that has nothing to say). It might *very well* be that there's a bug in the libraries we use or in our code - the problem is that I have no idea where to look for a bug. Aren't there additional logs we could enable? Or compiler flags so that the game would crash immediately when something goes south instead at some random location? The libraries we use are: LWJGL (http://www.lwjgl.org) for the visuals NativeBass (http://jerome.jouvie.free.fr/nativebass/, JNI-bridge) and BASS (http://www.un4seen.com/bass.html, actual library) for music and sound effects Do you suggest we deploy the game without music and sound effects? The bugs are rare - letting thousands people download a version without music/sound would be worse IMHO.
  13. NullPointerException in String.format

    But our game depends on those libraries. It doesn't work without them. And I don't have a way to reproduce the problem on my machine. So how do you suggest to solve the problem? Fact is, that the Oracle JVM doesn't crash.
  14. NullPointerException in String.format

    I have similar crashlogs from all over the world (different operating systems & hardware). That's why I suspect it's not a hardware issue. Since we use some native libraries it might well be that one of them corrups memory somehow. But I have no idea how I could verify this hypothesis.
  15. NullPointerException in String.format

    More random crashes... java.lang.StringIndexOutOfBoundsException: String index out of range: 3 at com.excelsior.internal.lang.KeyStrings.newString(KeyStrings.java:95) at java.lang.StringBuffer.toString(StringBuffer.java:592) at net.gewaltig.cultris.gui.controls.CLabel.reflow(CLabel.java:190) at ... I cannot reproduce any of the issues on my machine reliably. And idea what to do next?
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