[kepler-dev] Running Matlab in Kepler
Christopher Brooks
cxh at eecs.berkeley.edu
Tue Mar 18 17:52:49 PDT 2008
Hi Dan,
The way ptolemy.matlab.Engine works is that it calls
ptolemy.data.expr.UtilityFunctions.loadLibrary(), which tries
really hard to load the library using different paths.
I added some print statements to loadLibrary(), and you can see that
in the default situation is finds $PTII/ptolemy/matlab/ptmatlab.dll
and then loads it
bash-3.2$ cd $PTII/ptolemy/matlab
bash-3.2$ $PTII/bin/vergil -jni demo/MatlabExpression/MatlabExpression.xml
loadLibrary: 0 ptolemy/matlab/ptmatlab
loadLibrary: 2 about to call System.loadLibrary(ptolemy/matlab/ptmatlab)
loadLibrary: 4 about to call System.loadLibrary(C:\cxh\ptII\ptolemy\matlab\ptmatlab.dll)
loadLibrary: 5 done!
If I move the $PTII/ptolemy/matlab/ptmatlab.dll to somewhere in my
path ($PTII/bin), then it finds it there as well:
bash-3.2$ ls *.dll
ptmatlab.dll
bash-3.2$ mv *.dll $PTII/bin
bash-3.2$ $PTII/bin/vergil -jni
loadLibrary: 0 ptolemy/matlab/ptmatlab
loadLibrary: 2 about to call System.loadLibrary(ptolemy/matlab/ptmatlab)
loadLibrary: 3 about to call System.loadLibrary(ptmatlab)
On what platform are you running the Kepler build scripts? Maybe
UtilityFunctions.loadLibrary() needs to be updated for that platform?
_Christopher
--------
Hi Christopher,
I am updating the Kepler build scripts for the Ptolemy matlab actor.
Could you change ptolemy.matlab.Engine to load the JNI library as
'ptmatlab' instead of 'ptolemy/matlab/ptmatlab'? The latter prevents
the library from being loaded unless it is in a directory structure
that has the form .../ptolemy/matlab/.
Thanks,
--dan
Christopher Brooks wrote:
> However, the Ptolemy matlab demo did not run within Kepler:
>
> ptolemy.kernel.util.IllegalActionException: There was a problem invoking
> the Ptolemy II Matlab interface.
> The interface has been tested under Windows and Linux,
> requires that Matlab be installed on the local machine.Refer to
> $PTII/ptolemy/matlab/makefile for moreinformation.
> in .MatlabExpression.MatlabExpression
> Because:
> Did not find 'ptolemy/matlab/ptmatlab' in path, searched user.home
> (c:\cxh\src\kepler) user.dir (C:\Documents and Settings\cxh) and the
> classpath for 'ptolemy/matlab/ptmatlab.dll', but that was not found eithe
r.
> classpath was:
> c:\cxh\src\kepler\build\classes;c:\cxh\src\kepler\build\src;c:\cxh\src\ke
pler;c:\cxh\src\kepler\configs;c:\cxh\src\kepler\lib;c:\cxh\src\kepler\lib\i
mages;c:\cxh\src\kepler\build\kepler-icons.jar;c:\cxh\ptII\lib\diva.jar;c:\c
xh\ptII\build\ptolemy-doc.jar;c:\cxh\ptII\build\classes;c:\cxh\ptII\build\sr
c
> Also tried loadLibrary("ptmatlab", exception for loadLibrary was:
> java.lang.UnsatisfiedLinkError: no ptmatlab in java.library.path
> at ptolemy.matlab.Expression.preinitialize(Expression.java:202)
> at ptolemy.actor.Director.preinitialize(Director.java:865)
>
> So, the next step would be to get the Ptolemy Matlab Expression actor
> to work in Kepler or to try the same experiment in Ptolemy.
>
> I can't try it right now because my Matlab license has expired.
>
> _Christopher
>
>
> myerramothu at miners.utep.edu wrote:
>
>> Hello Everyone,
>>
>> Thank you Dr. Ludaescher for your reply. The problem that I posted in
>> Kepler users mailing list was my first question and I think the problem
>> was because I was running Matlab in Kepler using windows operating
>> system. I was able to run the Matlab in Kepler without any error using
>> Linux operating system.
>>
>> My current problem is: I observed a significant slow down in the
>> execution of my Matlab functions when they are executed in Kepler.
>> The Matlab actor I am using is /Matlabexpression/. I am sending you
>> a workflow that calculates the kurtosis and skewness of a Gaussian
>> random sequence as an attachment to this email. The workflow that I am
>> sending was developed and executed by me in Linux operating system and
>> time taken to execute this workflow was approximately 2mins and 10secs.
>> However, the Matlab instructions used in this workflow can be executed
>> approximately in 1-2secs when typed directly in Matlab command line.
>>
>> Your help will be very valuable for me to further use the Kepler.
>>
>> Please check the attachment to this email.
>>
>> Thank you very much for your time,
>> Sincerely,
>> Madhu.
>>
>>
>>
>>
>> --------------------------------------------------------------------
----
>> CC: myerramothu at miners.utep.edu; daks-dev at googlegroups.com;
>> crawl at sdsc.edu; cxh at eecs.berkeley.edu; jones at nceas.ucsb.edu
>> From: altintas at sdsc.edu
>> Subject: Re: Running Matlab in Kepler
>> Date: Sun, 2 Mar 2008 21:49:12 -0800
>> To: ludaesch at ucdavis.edu
>>
>> Hi Madhu,
>>
>> Which Matlab actor are you using? I couldn't find your post to
>> kepler-dev. Could you please forward that one as well?
>>
>> Thanks,
>> -ilkay
>>
>> On Mar 1, 2008, at 2:56 PM, Bertram Ludaescher wrote:
>>
>> Hi Madhu:
>>
>> I haven't used the Matlab actor directly, so not sure whether
>> the problem you describe is a known issue.
>> I'm cc-ing some people who might know.
>>
>> All (Ptolemy/Kepler people developers):
>> Have you witnessed the problem Madhu described?
>> I think we use the same Matlab actor in Kepler that is used in
>> Ptolemy, yes?
>>
>> Madhu:
>> You might also send a workflow snippet (e.g. MOML) that shows
>> the problem to kepler-dev.
>>
>> best
>>
>> BL
>>
>>
>> On Thu, Feb 28, 2008 at 5:20 PM, <myerramothu at miners.utep.edu
>> <mailto:myerramothu at miners.utep.edu>> wrote:
>>
>> Hello Dr. Ludaescher,
>>
>> Sorry to contact you directly.
>> I sent an e-mail to the the Kepler mailing list
>> about using Kepler with Matlab but I didn't get any reply.
>> I'm having the following problem:
>> t here is a significant slow down in the execution of my Mat
lab
>> functions when they are executed inside Kepler.
>> I would like to know if this is a characteristic of Kepler w
ith
>> Matlab or if it could be a problem specific to my
>> implementation.
>>
>> Thank you for your attention,
>> Sincerely,
>> Madhu.
>>
>> Madhu Kishore Yerramothu
>> Graduate Teaching Assistant,
>> Department of Electrical and Computer Engineering,
>> University of Texas at El Paso
>> El Paso, TX 79968.
>> Phone: 915 217 4778
>> Email: myerramothu at miners.utep.edu
>> <mailto:myerramothu at miners.utep.edu>
>>
>>
>>
>>
>>
>>
>>
> _______________________________________________
> Kepler-dev mailing list
> Kepler-dev at ecoinformatics.org
> http://mercury.nceas.ucsb.edu/ecoinformatics/mailman/listinfo/kepler-dev
>
--------
More information about the Kepler-dev
mailing list