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Reference Manual: A Guide to Commandline Options in JRockit

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D Startup Options

 


jrockit.adaptiveFatSpinMaxSleep

Description

Adaptive fatlock-spinning

Tunables:

-Djrockit.adaptiveFatSpinMaxSleep=1000
Number of sleeps that must get the lock early before JRockit goes back to spinning.

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.adaptiveFatSpinMaxSpin

Bjrön

Description

Number of spins that must fail before we switch to sleeping. What is a spin in this context?

Operation

-Djrockit.adaptiveFatSpinMaxSpin=1000

Flags or Other Options Affected

Exceptions

 


jrockit.adaptiveFatSpinTimeStampDiff

Björn

Description

-Djrockit.adaptiveFatSpinTimeStampDiff=2000000
Max diff in CPU-specific ticks that we think spinning is beneficial.

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.affinity

Jocke

Description

Operation

Flags or Other Options Affected

Exceptions

 


-Djrockit.assertion.dontstop

When an assert happens, BEA JRockit usually stalls waiting for the user to attach a debugger. Using this option, JRockit will print a message and then continue to run.

This option is used only to debug BEA JRockit and does not ship with the product.

Operation

Flags or Other Options Affected

Implementation

Exceptions

 


jrockit.cleartype

Eva

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.codecoverage.appendoutput

Fredrik

Description

Append to the output file rather than overwriting it.

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.codecoverage.filter

Fredrik

Description

-Djrockit.codecoverage.filter=<filterspec> Sets which classes should be covered.

Filterstrings starting with "-" will be considered as classes that should not be covered. Separate filters with ";" on windows and ":" on Linux Example:

-Djrockit.codecoverage.filter=java/util/Hashtable;com/bea/*;-com/bea/blabla.* 

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.codecoverage.filterfile

fredrik

Description

Set the filename of a file including the filter. The fileformat is one filterstring per line.

Operation

-Djrockit.codecoverage.filterfile=<filename>

Flags or Other Options Affected

Exceptions

 


jrockit.codecoverage.outputfile

Fredrik

Description

-Djrockit.codecoverage.outputfile=<filename>

Set the file where output is written. If the output file cannot be opened for writing <filename>_0, <filename>_1, and so on will be tried. This can be useful if several JVMs share a common commandline.

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.codecoverage.testid

Freddan

Description

-Djrockit.codecoverage.testid=<id-string>

Set the initial test identifier

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.codecoverage.verbose

Freddan

Description

-Djrockit.codecoverage.verbose

Make code coverage more verbose. Useful for performing textual differences between coverage files. Everything is plain text.

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.codegen.checkedstacks

Jocke

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.codegen.cgpriority

Micke

Same as for optpriority but this is for the normal codegeneration.

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.codegen.cgthreads

Micke

Description

This option defines the number of code generation threads that are going to be allowed. Normal is one per CPU.

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.codegen.listlength

Micke

Description

Defines how long the code generation line is allowed to be.

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.codegen.nojitinline

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.codegen.nopriv

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.codegen.noquickjit

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.codegen.noquickStart

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.codegen.noscheduling

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.codegen.oldstylejit

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.codegen.optthreads

Description

This sets how many code generation threads that yeilds the optimal use. The normal is one per CPU.

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.codegen.freq.nocalls

Jocke

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.codegen.freq.nothrows

Jocke

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.codegen.nobounds

Jocke

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.codegen.nopmpyshr

Jocke

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.codegen.nopreservedthis

Jocke

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.codegen.optpriority

Micke

Description

This option defines which priority the thread that is being optimized should have.

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.codegen.preopt

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.codegen.printOptState

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.codegen.quickjit

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.codegen.strictfp

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.codemgr.breakonthisclass

Marcus

Description

Does it still crash if you run JRockit with XnoOpt?

If yes, optimizations are probably not to blame, examine the code generation by running with -Xverbose:codegen. Examine the latest generated methods, does any of them occur during several crashes? Do they look suspiscious, i.e. have many parameters, nested blocks, etc. Try to generate the same methods in your own program, create dummy classes so that the new method has the exact same structure. (The program doesn't have to run, just be generated.)

If it doesn't crash, remove the -Xnoopt flag and run with -Xverbose:opt to examine the optimization behavior.

-Xverbose:codegen is also useful as general tool for tracking down which Java code was being run at the time, even if Java stack is missing.

Do you suspect a certain class or method? Specify the java property jrockit.codemgr.breakonthisclass="fully qualified class name" jrockit.codemgr.breakonthismethod="method name" or jrockit.codemgr.breakonthisdescriptor="descriptor name"

Put a breakpoint on the function cmgrBreakpoint in codemanager.c.

Operation

Used for debugging purposes only.

Flags or Other Options Affected

Exceptions

 


jrockit.codemgr.breakonthisdescriptor

Marcus

Description

See above.

Operation

Used for debugging purposes only.

Flags or Other Options Affected

Exceptions

 


jrockit.codemgr.breakonthismethod

Marcus

Description

See above.

Operation

Used for debugging purposes only.

Flags or Other Options Affected

Exceptions

 


jrockit.codemgr.callprof.disabled

Micke.

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.codemgr.callprof.exact

Micke

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.codemgr.callprof.maxdistinctcalls

Micke

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.codemgr.callprof.polymorphism

Micke

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.codemgr.insertci

Jocke

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.codemgr.longcalls

Micke

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.codemgr.naivesched.disable

Tuva

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.codemgr.naivesched.dstBlock.maxNoofOp

Tuva

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.codemgr.naivesched.dstBlock.minNoofOp

Tuva

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.codemgr.naivesched.srcBlock.maxNoofOp

Tuva

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.codemgr.naivesched.srcBlock.minNoofOp

Tuva

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.codemgr.noandopt

Micke

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.codemgr.noremopt

Micke/Peter

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.codemgr.outfile

Olof inkomplett implementation,

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.codemgr.printrf

MIcke

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.codemgr.shladd

Peter/Micke

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.codemgr.switchconv.disable

Tuva

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.cpu.ia32.netburst

Marcus.

Description

This option sets which type of ia32 architecture that the code is optimized for. In this case it is the NetBurst architecture.

Operation

Set the option with:

Flags or Other Options Affected

Exceptions

 


jrockit.ctrlbreak.enable

Staffan

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.debuglibs

Calle

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.disableAdaptiveFatSpin

Björn

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.disableFatLockDeflation

Björn

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.disablefatspin

Björn

Description

Normal fatlock-spinning

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.dlmalloc.pagesize

Marcus

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.dontusectrlbreakfile

Staffan

Description

How the new controllable Ctrl-Break works: when you press Ctrl-Break JRockit will search for a file named ctrlhandler.act in your current working directory. If it doesn't find the file there it will look in the directory of the jvm. If it does not find this file there either it will revert to displaying the normal thread-dump. However, if it finds the file, it will read the file searching for command entries, each command entry will invoke the corresponding ctrl-break handler.

You can disable this functionality by setting -Djrockit.dontusectrlbreakfile=true.

Each command entry starts with a ctrl-break-handler name followed by the arguments to be passed to the ctrl-break handler. The arguments should be on the property form (i.e. name=value). String, integer or boolean values are acceptable property types. See the ctrlhandler.act example below.

Operation

To enable/disable any CtrlBreakHandler use the system property:

-Djrockit.ctrlbreak.enable<name>=<true|false>

where name is the name of the CtrlBreakHandler. The follwoing two handlers are disallowed by default and need to be turned on: run_class and force_crash

Flags or Other Options Affected

Exceptions

 


jrockit.dumpmap

Saffan

Hittar inget.

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.dumputf8pool

Calle

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.enablefatspin

Björn

Description

Fat lock optimization.

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.fatLockDeflationLimit

Björn

Description

Lock deflation

Number of uncontended fatlock unlocks before we deflate.

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.fatlockpolls

Björn

Hittar inget.

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.fatlockreads

Björn

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.fatlockspins

Björn

Description

Adaptive fatlock-spinning

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.fatlockyields

Björn.

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.fullsystemgc

Eva

Description

Operation

mmInitMemoryManager("Xgc", "parallel"); mmSetCompactRatio(0); mmSetMinBlockSize(64*1024); setSystemProperty("jrockit.fullsystemgc", mmStrdup("true")); #if defined(IA64) lowmemUseLargePagesDontExit(); #endif 

Flags or Other Options Affected

Exceptions

 


jrockit.heapfrag.path

Fredrik

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.heapreport

Noora/Eva

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.hotspot.boostlength

Jocke

Description

opt:

setSystemProperty("jrockit.hotspot.mode", mmStrdup("boost"));

setSystemProperty("jrockit.hotspot.booststart", mmStrdup("20"));

setSystemProperty("jrockit.hotspot.boostlength", mmStrdup("200"));

setSystemProperty("jrockit.hotspot.noofcandidates", mmStrdup("300"));

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.hotspot.booststart

Jocke

Description

opt:

setSystemProperty("jrockit.hotspot.mode", mmStrdup("boost"));

setSystemProperty("jrockit.hotspot.booststart", mmStrdup("20"));

setSystemProperty("jrockit.hotspot.boostlength", mmStrdup("200"));

setSystemProperty("jrockit.hotspot.noofcandidates", mmStrdup("300"));

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.hotspot.mode

Jocke

Description

opt:

setSystemProperty("jrockit.hotspot.mode", mmStrdup("boost"));

setSystemProperty("jrockit.hotspot.booststart", mmStrdup("20"));

setSystemProperty("jrockit.hotspot.boostlength", mmStrdup("200"));

setSystemProperty("jrockit.hotspot.noofcandidates", mmStrdup("300"));

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.hotspot.noofcandidates

Jocke

Description

opt:

setSystemProperty("jrockit.hotspot.mode", mmStrdup("boost"));

setSystemProperty("jrockit.hotspot.booststart", mmStrdup("20"));

setSystemProperty("jrockit.hotspot.boostlength", mmStrdup("200"));

setSystemProperty("jrockit.hotspot.noofcandidates", mmStrdup("300"));

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.inflationthreshold

Bjrön

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.jradelay

Helena

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.jrafilename

Helena

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.jranativesamples

Helena

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.jranogcsampling

Helena

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.jranomethodsampling

Helena.

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.jrarecordingtime

Helena

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.jrasampletime

Helena

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.loading.breakonthisclass

Marcus

Description

This option is used when JRockit is loaded from disk or a network. It works like codebreak on this class?!.

Operation

Used for debugging purposes only.

Flags or Other Options Affected

Exceptions

 


jrockit.lockprofiling

Björn

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.mallocfailure.freq

Johan

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.managementserver

Hirt

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.memleak

Helena

Description

-Djrockit.memleak=true - enables detailed heap statistics after GCs Operation

Flags or Other Options Affected

Exceptions

 


jrockit.memleak.period

Helena

Description

-Djrockit.memleak.period=# - informs the memleak information on how frequent to count and display detailed heap statistics: 1 means every gc, 2 means every other gc etc.

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.memleak.periodtype

Hlelealn

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.monitorpolls

Björn

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.monitorspins

Björn.

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.ncpus

Jocke

Description

Operation

Flags or Other Options Affected

Exceptions

 


XXnoBounds

Jocke Vad gör denna här egentligen?

Description

never generate arrayboundschecks. Debugging purposes.

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.nohup

Staffan

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.noparsweep

David

Description

One feature (that can be confusing) is that if the concurrent mark phase discovers that it runs out of memory it will force a parallel sweep, even if the user has asked for a concurrent sweep. This is because there is no point in doing a concurrent sweep phase if the freelist is empty. It is better to utilize all available processors to do the sweeping, so the pause at least stays as short as possible.

Operation

This behaviour can be turned off with -Djrockit.noparsweep=true

Flags or Other Options Affected

Exceptions

 


jrockit.nopauseonexit - only really used in launcher

QA internal

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.nosystemgc

Eva.

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.oldsystemgc

Eva

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.oomdiagnostics

Eva

Description

This option displays information about out of memory errors, physical memory, shows diagnostics of the heap, and it also displays other information. The option can be forced with the oom_diagnositcs CtrlBreakHandler.

Operation

This is how you print an OutOfMemoryDiagnostics. If both set_filename and -Djrockit.oomdiagnostics.filename is set, the latter takes precedence. (what does that mean that the latter takes precedence??)

  1. Start with the platform where the application is already installed (marked bold in the table below??).
  2. Run JRockit and your application twice--once for each of the below displayed configuration:
-XXsetgc:barbapappa -Xdebug -Djrockit.oomdiagnostics=true -XXcodecache -Xmanagement
-XXaggressive:opt -Djrockit.oomdiagnostics=true -XXcodecache -Xmanagement
  1. Once during each run, try to connect the management console and make a JRA recording (there is a menu-option for doing this through the console!!!).
  2. Once during each run, get a memusage dump for the application. Your ctrlhandler.act must contain at least the following lines:
version
command_line
print_memusage
  1. Report any bugs you find with as much information as possible. Before filing, try to reproduce it and add "reproduceability"-info to the CR as well. Please set the "Test Class" of the CR to "Trashathon".
  2. When considered done with a platform, move on to one of your other designated platforms. Install, setup and run your application on the new platform, following the same proceedure as presented in steps 2 through 6.

Note: If you have any problems installing your application on a new platform (following the instructions documented on the wiki), please install WLS and run MedRec instead, or PetStore.

Flags or Other Options Affected

Exceptions

 


jrockit.oomdiagnostics.filename

Eva

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.optfile

Olof

Description

Nullness in GCM (Marcus) - We erronuously move a faulting instruction

-Xnoopt -Xverbose:opt -Djrockit.optfile=c:\views\mikael\optfile -Xverify -Xmx1g -XXpreopt -cp C:\jck\JCK-runtime-14a\classes -Djava.security.policy=C:\jck\JCK-runtime-14a\lib\jck.policy javasoft.sqe.tests.api.java.awt.Component.prepareImageTests -TestURL file:///C:/jck/JCK-runtime-14a/tests/api/java_awt/Component/descriptions.html#prepareImage

optfile: + java/awt/Component:getToolkit*

Works?

Directives are used for saying that certain methods should not be optimized, or should be forced optimized. By specifing a file with -Djrockit.optfile= this file is used for reading directives to the optimizer. The file contains lines with methods and directives.

For example, the following file:

 + bm.time.StaticFactorialTest:fact(I)I
 - java.lang.FloatingDecimal:dtoa
 - java.lang.Object
 + sun.awt.windows.WComponentPeer:set*

means that the fact(I)I method in StaticFactorialTest is optimized the first time we hit it and that all methods called dtoa in FloatingDecimal as well as all methods in Object are never optimized. And that all methods in sun.awt.windows.WComponentPeer beginning with 'set' should be optimized. Conflicting directives are applied from the top, the first match is used.

Wildcards ('*') can be used last in a class or method name.

If the method or descriptor is skipped, it is taken to mean all methods and descriptors.

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.printexceptions

Staffan

Description

There are several verbose options available in JRockit, most are not publicly documentated for various reasons. They are specified in the form:
-Xverbose:component <,componentN>
E.g: -Xverbose:memory,opt
The output ends up in stderr bu default, but may by sent to file using -Xverboselog=. A description of each "component" follows.

Print exceptions and stacktraces

You can set these options to get more information about exceptions being thrown by the program. (In pre-Ariane81SP3Load6 this only works for DEBUG versions).

-Djrockit.printexceptions=true|all|false
-Djrockit.printstacktraces=true|all|false

The all option will print every exception, while the true option will print everything except java/util/EmptyStackException, java/lang/ClassNotFoundException and java/security/PrivilegedActionException since these are thrown multiple times by the classloaders for each loaded class.

You can also control this through a Ctrl Break Handler (only post Ariane81SP3Load6) called print_exceptions. It takes two arguments: exceptions and stacktrraces with the same parameters as above. For example:

print_exceptions exceptions=true stacktraces=true

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.printOpState

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.printstacktraces

Saffan

Description

Print exceptions and stacktraces

You can set these options to get more information about exceptions being thrown by the program. (In pre-Ariane81SP3Load6 this only works for DEBUG versions).

-Djrockit.printexceptions=true|all|false
-Djrockit.printstacktraces=true|all|false

The all option will print every exception, while the true option will print everything except java/util/EmptyStackException, java/lang/ClassNotFoundException and java/security/PrivilegedActionException since these are thrown multiple times by the classloaders for each loaded class.

You can also control this through a Ctrl Break Handler (only post Ariane81SP3Load6) called print_exceptions. It takes two arguments: exceptions and stacktrraces with the same parameters as above. For example:

print_exceptions exceptions=true stacktraces=true

Operation

ant -f run.xml test -Dtpw.test=specjbb-Dtpw.level=sanity -Dspecjbb.test.home=D:\tests\SPECjbb2000 -Dtest.jvm.home=d:\java\jrockit-j2sdk1.4.2_03 -Dtest.jvm.exe=d:\java\jrockit-j2sdk1.4.2_03\bin\java -Dtest.jvm.args="-showversion -Xgc:gencon -Djrockit.printstacktraces=all" 

Flags or Other Options Affected

Exceptions

 


jrockit.prinstart

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.printsystemgc

Eva.

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.reflect.GenerateCompiledInvokers

Dr. Dynga

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.rollforward.range

Micke

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.rollforward.wait

Micke

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.showallocsiteforclass

Staffan

Description

-Djrockit.showallocsiteforclass=name - printout the back-trace for each allocation site of the class named . Each back-trace is printed out only the first time, though the same allocation site might be displayed multiple times if the back-trace is different.´

Operation

	Allocation site: 0 for class java/lang/String
		at java/io/BufferedReader.readLine(BufferedReader.java:331)
		at java/io/BufferedReader.readLine(BufferedReader.java:362)
		at java/util/Properties.load(Properties.java:192)
		at java/util/logging/LogManager.readConfiguration(L:555)
		.
		at java/lang/Thread.run(Unknown Source)
		--- End of stack trace
	Allocation site: 1 for class java/lang/String
		at java/util/Locale.toUpperCase(Locale.java:1138)
		at java/util/Locale.<init>(Locale.java:265)
		at java/util/Locale.<clinit>(Locale.java:195)
		at java/util/Locale.getDefault(Locale.java:???)
		at java/lang/String.toLowerCase(Unknown Source)
		at java/net/URL.<init>(URL.java:366)
		.
		at java/lang/Thread.run(Unknown Source)
		--- End of stack trace

When allocation site is enabled you will also see some cryptic information at the end of the deatailed heap statistics dump: "[0: 2] [1: 5]" This is information about what allocation sites are called most frequently. The first number in each pair is the allocation site, the second number is a frequency counter, a high number means that it is called often. The way it works is that every nth time one of the allocation sites is reached the counter for that allocation site is incremented.

Flags or Other Options Affected

Exceptions

 


jrockit.skiposcheck

Staffan

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.spinsbeforeinflation

Bjrön

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.spinsbeforeread

Björn

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.spinsbeforeyield

Bjöprn

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.thinlockpolls

Björn

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.thinlockspins

Björn

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.useAdaptiveFatSpin

Björn

Description

Adaptive fatlock-spinning

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.usectrlbreakfile

Staffan.

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.useFatLockDeflation

Björn.

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.verboserefs

Mattias

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.verify

Staffan

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.vm

It is a property that QA might want to know what it is.

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.waitonerror

Staffan.

Description

Operation

Flags or Other Options Affected

Exceptions

 


java.vendor

Description

Operation

Flags or Other Options Affected

Exceptions

 


java.vendor.url

Description

Operation

Flags or Other Options Affected

Exceptions

 


jrockit.version

Description

Operation

Flags or Other Options Affected

Exceptions

 


java.vm.specification.version

Description

Operation

Flags or Other Options Affected

Exceptions

 


java.vm.specification.vendor

Description

Operation

Flags or Other Options Affected

Exceptions

 


java.vm.specification.name

Description

Operation

Flags or Other Options Affected

Exceptions

 


java.vm.vendor

Description

Operation

Flags or Other Options Affected

Exceptions

 


java.vm.version

Description

Operation

Flags or Other Options Affected

Exceptions

 


java.vm.vendor.url

Description

Operation

Flags or Other Options Affected

Exceptions

 


java.vm.name

Description

Operation

Flags or Other Options Affected

Exceptions

 

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