Re: [xmlvm-users] Confused by error messages

[Jeremiah B. <jbl...@da...>]

Hi Sascha (and others),

I've gotten a little further now. At this point I don't think my current
machine has enough memory to actually translate the project in question
using the current version of XMLVM, but I wanted to let you know what I
found out for future reference. It's a pretty big project and I know that
XMLVM is a work in progress, so it may just be a matter of scale. When I get
to an upgrade point, or when XMLVM is a bit more mature, I'll try again.
Anyway, here's what I've found.

It looks like one of the pre-built files - nbproject\xcode.xml - has the
setting "-Xmx512m" hard-coded in. I changed it and also added "--debug=all"
to the same file.

However, it's still running out of memory. After some testing, I went with
1350m - on my machine, anything more than that starts thrashing the hard
disk due to excessive paging. The memory for the java process goes up to
around 1500M or so according to top.

Here's an abbreviated version of the output:

-do-xproject:
     [echo] Creating Xcode project
     [java] Executing
'/System/Library/Frameworks/JavaVM.framework/Versions/1.6.0/Home/bin/java'
with arguments:
     [java] '-Xmx1350m'
     [java] '-jar'
...
     [java] [02/12/11 12:06:09.731]    DEBUG: Forcing --enable_ref_counting
for target IPHONE
     [java] [02/12/11 12:06:09.806]    DEBUG: Instantiated:
org.xmlvm.proc.in.InputProcess$ClassInputProcess
...
     [java] [02/12/11 12:06:25.750]    DEBUG: DEXmlvmOutputProcess-ref:
Processing method: interpretCode
     [java] [02/01/11 13:15:12.901]    ERROR: Oh no, XMLVM needs more
memory. Try running with -Xmx1G.

... and following that, a lot of exception and stack trace info.

The file it gets caught on is about 100K, and the function interpretCode is
about 1000 lines long and includes a large switch statement (about 140
cases) as it is an interpreter for an instruction set.

I'm not sure if this helps narrow it down or not. I could try to come up
with a simplified code segment that still exhibits the problem, though it
may be difficult as I have to find a way to eat up a comparable amount of
memory. :)

Regards,
Jeremiah Blanchard

On Mon, Feb 7, 2011 at 1:48 PM, Sascha Haeberling <sa...@xm...> wrote:

> This error message is only printed, if indeed an OutOfMemoryException is
> being thrown. I am not too sure what run-Xcode does, but if this error even
> happens with 2G of RAM granted, then something seems fishy.
>
> Can you run with --debug=all and see whether you can find anything
> suspicious?
>
> // Sascha
>
> On Mon, Feb 7, 2011 at 6:33 PM, Jeremiah J. Blanchard <
> jbl...@da...> wrote:
>
>> Hi there,
>>
>> I've been trying, without much success, to compile and run a project in
>> Xcode. Specifically, XMLVM gives me the following error when build using
>> "run-Xcode":
>>
>> -do-xproject:
>>      [echo] Creating Xcode project
>>      [java] [02/01/11 13:10:56.239]    DEBUG: Forcing
>> --enable_ref_counting for target IPHONE
>>      [java] [02/01/11 13:15:12.901]    ERROR: Oh no, XMLVM needs more
>> memory. Try running with -Xmx1G.
>>
>> I've actually set the ANT_OPTS variable for the memory to various values
>> (1G, 2G, etc), but the same error shows up. Is there something I'm
>> missing? The process itself usually gets up to around 650M before it
>> errors out. Any help would be great! :)
>>
>> --Jeremiah
>>
>>
>>
>> ------------------------------------------------------------------------------
>> The modern datacenter depends on network connectivity to access resources
>> and provide services. The best practices for maximizing a physical
>> server's
>> connectivity to a physical network are well understood - see how these
>> rules translate into the virtual world?
>> http://p.sf.net/sfu/oracle-sfdevnlfb
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>>
>
>