[xep-support] JIT Compiler "off" not found

[Werner Donné]

Chris,

I see no options to turn off the JIT and as you can see it is enabled by default.
I therefore have no explanation for the symptom you are experiencing. Sorry.

Werner.

Chris Braddock wrote:
> Thanks Werner.  Here's some info:
> 
> 
> # /usr/java130/bin/java
> Usage: java [-options] class [args...]
>           (to execute a class)
>   or  java -jar [-options] jarfile [args...]
>           (to execute a jar file)
> 
> where options include:
>    -cp -classpath <directories and zip/jar files separated by :>
>              set search path for application classes and resources
>    -D<name>=<value>
>              set a system property
>    -verbose[:class|gc|jni]
>              enable verbose output
>    -version  print product version
>    -showversion  print product version and continue
>    -? -help  print this help message
>    -X        print help on non-standard options
> 
> # /usr/java130/bin/java -X
>    -Xbootclasspath:<directories and zip/jar files separated by ;>
>                      set search path for bootstrap classes and resources
>    -Xbootclasspath/a:<directories and zip/jar files separated by ;>
>                      append to end of bootstrap class path
>    -Xbootclasspath/p:<directories and zip/jar files separated by ;>
>                      prepend in front of bootstrap class path
>    -Xnoclassgc       disable class garbage collection
>    -Xms<size>        set initial Java heap size
>    -Xmx<size>        set maximum Java heap size
>    -Xss<size>        set the maximum native stack size for any thread
>    -Xos<size>        set the maximum Java stack size for any thread
>    -Xrs              reduce the use of OS signals
>    -Xcheck:jni       perform additional checks for JNI functions
>    -Xcheck:nabounds  perform additional checks for JNI array operations
>    -Xrunhprof[:help]|[:<option>=<value>, ...]
>                      perform heap, cpu, or monitor profiling
>    -Xdebug           enable remote debugging
>    -Xfuture          enable strictest checks, anticipating future default
> 
> The -X options are non-standard and subject to change without notice.
> #
> 
> # /usr/java130/bin/java -version
> java version "1.3.0"
> Java(TM) 2 Runtime Environment, Standard Edition (build 1.3.0)
> Classic VM (build 1.3.0, J2RE 1.3.0 IBM build ca130-20020504 (JIT 
> enabled: jitc)
> )
> #
> 
> 
> 
>> Chris,
>>
>> The only error I see is that strictly speaking "-Xmx400mb" should be 
>> "-Xmx400m",
>> but I fail to see how that could affect JIT settings. The only way I 
>> know in JDK1.3
>> to turn of the JIT is with the option -Xint. By default the client 
>> HotSpot JIT is
>> active.
>>
>> All this is of course about the Sun JRE. I think you use the one from 
>> IBM. Could you
>> therefore send the usage string of the java command?
>>
>> Werner.
>>
>> Chris Braddock wrote:
>>
>>>> Chris,
>>>>
>>>> What is the complete command-line you use?
>>>>
>>>> Werner.
>>>
>>>
>>>
>>>
>>> Werner,
>>>
>>> I use a modified xep.sh.  I had a bootstrap classpath problem that 
>>> prompted the -Xbootclasspath addition.
>>>
>>> #begin xep.sh
>>> # This script encapsulates a standard XEP call.
>>>
>>> JAVA_HOME=/usr/java130/jre
>>>
>>> XEP_HOME=/usr/dbx/weblive/XEP
>>>
>>> CP=$XEP_HOME/lib/xep342_trial.jar:$XEP_HOME/lib/cryptix32.jar:$XEP_HOME/lib/cryp 
>>>
>>>
>>> tix32-pgp.jar:$XEP_HOME/lib/saxon.jar:$XEP_HOME/lib/xt.jar
>>>
>>> $JAVA_HOME/bin/java -Xmx400mb 
>>> -Xbootclasspath/p:/usr/dbx/weblive/XEP/lib/saxon.j
>>> ar -classpath $CP -Dcom.renderx.xep.ROOT=$XEP_HOME  
>>> com.renderx.xep.XSLDriver $*
>>>
>>>
>>> set CP=
>>> #end xep.sh
>>>
>>> Thanks,
>>>
>>> Chris
>>>
>>>
>>>
>>>> Chris Braddock wrote:
>>>>
>>>>> Anyone?
>>>>>
>>>>>> Wondering if anyone can help with this error:
>>>>>>
>>>>>> #Warning: JIT compiler "off" not found. Will use interpreter.
>>>>>>
>>>>>> XEP still performs as expected, however I'm not a Unix or Java 
>>>>>> guy, but as I understand it, a JIT compiler should give a 
>>>>>> performance boost to (the XEP) java code.  If this is correct, I'd 
>>>>>> definitely like to take advantage of it.
>>>>>>
>>>>>> Opsys is Aix 4.3.
>>>>>> Java 1.3.0
>>>>>>
>>>>>> Thanks
> 
> 
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-- 
Werner Donné  --  Re BVBA
Engelbeekstraat 8
B-3300 Tienen
tel: (+32) 486 425803	e-mail: werner.donne at re.be

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