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Build ID: I20070503-1400 Steps To Reproduce: Eclipse runs more and more slowly until it runs out of PermGen space or simply becomes unresponsive entirely (Windows shows "Not responding" in title bar). I hereby pointing the finger at CDT indexer. The Java indexer does not show any indication of running into this problem. More information: I'll try to gather evidence. I've removed CDT nature from the project to see what happens. I'm working on a project w/ca. 11800 files of which ca. 100-200 are C/C++ files. Could # of files be what is making the indexer go ga-ga?
I'll leave this open for now to give you time to gather your evidence :-) Are you sure it's CDT though? I've run into this a lot without CDT. Mylar for example is apparently a bad offender on the PermGen space issue due to the number of classes it loads.
(In reply to comment #1) > I'll leave this open for now to give you time to gather your evidence :-) Thanks. I believe this PermGen stuff is some of the worst Java stuff to track down... > Are you sure it's CDT though? I've run into this a lot without CDT. Mylar for > example is apparently a bad offender on the PermGen space issue due to the > number of classes it loads. I deleted the offending CDT project and Eclipse seems much happier now. I'll try to reenable that project later without the CDT nature. >
Could you please check that your C content types are mapped to the gcc parser and not the C99 parser.
(In reply to comment #3) > Could you please check that your C content types are mapped to the gcc parser > and not the C99 parser. I don't know how to check that. First I'll be trying to remove the CDT nature and see if the system behaves. I don't have something specific to test against so I'll just have to run without CDT nature for a couple of days to see if the system behaves nicely. This is the .cdtproject I deleted: <?xml version="1.0" encoding="UTF-8"?> <?eclipse-cdt version="2.0"?> <cdtproject/> This is the .cproject I deleted: <?xml version="1.0" encoding="UTF-8"?> <?fileVersion 4.0.0?> <cproject> <storageModule moduleId="org.eclipse.cdt.core.settings"> <cconfiguration id="converted.config.610783818"> <storageModule moduleId="cdtBuildSystem" version="4.0.0"> <configuration buildProperties="" description="" errorParsers="" id="converted.config.610783818" name="Configuration1" parent="org.eclipse.cdt.build.core.prefbase.cfg"> <folderInfo id="converted.config.610783818./" name="/" resourcePath=""> <toolChain errorParsers="" id="org.eclipse.cdt.build.core.prefbase.toolchain.1797433517" name="No ToolChain" resourceTypeBasedDiscovery="false" superClass="org.eclipse.cdt.build.core.prefbase.toolchain"> <targetPlatform binaryParser="" id="converted.config.610783818./.251636987" name=""/> <builder appendEnvironment="true" arguments="" autoBuildTarget="all" 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(In reply to comment #4) > (In reply to comment #3) > > Could you please check that your C content types are mapped to the gcc parser > > and not the C99 parser. > I don't know how to check that. The easiest check is: did you install the C99 feature? If not you shouldn't have a problem, or at least not there.
(In reply to comment #5) > (In reply to comment #4) > > (In reply to comment #3) > > > Could you please check that your C content types are mapped to the gcc parser > > > and not the C99 parser. > > I don't know how to check that. > > The easiest check is: did you install the C99 feature? If not you shouldn't > have a problem, or at least not there. I'm running from CDT CVS HEAD, so I don't know whether that means I've got C99 or not. >
(In reply to comment #6) > (In reply to comment #5) > > (In reply to comment #4) > > > (In reply to comment #3) > > > > Could you please check that your C content types are mapped to the gcc parser > > > > and not the C99 parser. > > > I don't know how to check that. > > > > The easiest check is: did you install the C99 feature? If not you shouldn't > > have a problem, or at least not there. > I'm running from CDT CVS HEAD, so I don't know whether that means I've got C99 > or not. > > You'd have feature and plugin projects with c99 in the name in your workspace. I'm guessing not if you are asking these questions :).
(In reply to comment #7) > (In reply to comment #6) > > (In reply to comment #5) > > > (In reply to comment #4) > > > > (In reply to comment #3) > > > > > Could you please check that your C content types are mapped to the gcc parser > > > > > and not the C99 parser. > > > > I don't know how to check that. > > > > > > The easiest check is: did you install the C99 feature? If not you shouldn't > > > have a problem, or at least not there. > > I'm running from CDT CVS HEAD, so I don't know whether that means I've got C99 > > or not. > > > > > You'd have feature and plugin projects with c99 in the name in your workspace. > I'm guessing not if you are asking these questions :). I don't remember seing C99 stuff anywhere no... If someone has any ideas on how to narrow this problem down, now is a good time to come forward. Is there a method to exclude CDT as the culprit? Is there a way to figure out if CDT is doing something wrong *before* Eclipse goes into the vegetative state??
I'd like to understand more about the state of the java-process while the IDE no longer responds: * does it consume CPU-cycles? * is the entire machine affected (how do other apps respond)? * is the java-process low on heap-memory? * is the java-process low on PermSpace? * a stack-trace could reveal what the IDE is currently trying to do. My favourite method of obtaining information like this: - use JDK 1.5 - start the process with -Dcom.sun.management.jmxremote. - use jconsole (part of JDK) to investigate memory-sizes and stack-traces.
(In reply to comment #9) > I'd like to understand more about the state of the java-process while the IDE > no longer responds: > * does it consume CPU-cycles? Yes. > * is the entire machine affected (how do other apps respond)? No. > * is the java-process low on heap-memory? > * is the java-process low on PermSpace? I frequently see PermSpace exceptions in the console when Eclipse is unresponsive. I'm using -XX:MaxPermSize=128m, which means that this is not a matter of too little PermSpace being available. I'll try the methods below. > * a stack-trace could reveal what the IDE is currently trying to do. The stack trace is going to be useless. *everything* is running slowly. > My favourite method of obtaining information like this: > - use JDK 1.5 > - start the process with -Dcom.sun.management.jmxremote. > - use jconsole (part of JDK) to investigate memory-sizes and stack-traces. I'll try this to see what I can find. BTW, it seems Eclipsee is behaving a little bit nicer after I closed the project w/many files & CDT nature.
- PermGen space in jconsole seems to sit at ca. 40mByte when Eclipse is still responsive. - Heap: 50mByte - Non-heap: 45 mbyte - Performing a GC does not change memory usage as reported by jconsole noticeably. Here is a copy & paste of the summary while Eclipse is still working fine: Summary Uptime: 10 minutes Process CPU time: 55,843 seconds Total compile time: 7,884 seconds Threads Live Threads: 17 Peak: 27 Daemon threads: 14 Total started: 52 Memory Current heap size: 44 804 kbytes Committed memory: 85 816 kbytes Maximum heap size: 1 040 512 kbytes Objects pending for finalization: 0 Garbage collector: Name = 'Copy', Collections = 145, Total time spent = 1,643 seconds Garbage collector: Name = 'MarkSweepCompact', Collections = 15, Total time spent = 5,782 seconds Classes Current classes loaded: 8 912 Total classes unloaded: 54 Total classes loaded: 8 966 Operating System Total physical memory: 1 046 604 kbytes Free physical memory: 171 520 kbytes Committed virtual memory: 152 928 kbytes
Interesting: I'm launching Eclipse CDT from the Eclipse JDT debugger as I tinker w/Eclipse. Could it be that it is not Eclipse CDT, but the Eclipse JDT debugger that is running out of PermGen space?
I've seen 70mByte PermGen memory used via JConsole after pressing GC when Eclipse is sluggish, so is that good or bad? Hmm.... will SWT process the Windows input loop while Java is garbage collecting? If not GC will cause the entire machine to be unresponsive.
(In reply to comment #13) > I've seen 70mByte PermGen memory used via JConsole after pressing GC when > Eclipse is sluggish, so is that good or bad? > Hmm.... will SWT process the Windows input loop while Java is garbage > collecting? If not GC will cause the entire machine to be unresponsive. Note that the PermGen space is filled by the VM itself + by calls to String.intern(), which is not used by CDT. You have to refer to bug 92250 and/or the JVM documentation for this issue. However, your numbers indicate that it should be sufficient to increase the PermGen size to 128mb in your case. Whether the GC blocks other threads or not is also a matter of the JVM. For Sun's JVM there is a command-line option to use a concurrent GC.
(In reply to comment #14) > (In reply to comment #13) > > I've seen 70mByte PermGen memory used via JConsole after pressing GC when > > Eclipse is sluggish, so is that good or bad? > > Hmm.... will SWT process the Windows input loop while Java is garbage > > collecting? If not GC will cause the entire machine to be unresponsive. > > Note that the PermGen space is filled by the VM itself + by calls to > String.intern(), which is not used by CDT. You have to refer to bug 92250 > and/or the JVM documentation for this issue. However, your numbers indicate > that it should be sufficient to increase the PermGen size to 128mb in your > case. I've got 128mByte of permgen. > Whether the GC blocks other threads or not is also a matter of the JVM. For > Sun's JVM there is a command-line option to use a concurrent GC. I don't agree. Performance of Eclipse is Eclipse business regardless of root cause. There may be an argument for adding JNI code to process the input loop while the JVM is off GC'ing if this is indeed a problem.
