On Jun 24, 2011, at 9:08 PM, David P Grove wrote:
>
>
>
> David E Hudak <dhu...@osc.edu> wrote on 06/24/2011 04:47:45 PM:
>>
>> [X10-users] Java native interface and runtime?
>>
>> Hi All,
>>
>> I have a colleague with a Java implementation of a genetic
>> algorithm. He is interested in parallelizing the application for
>> both multicore and multinode execution.
>>
>> In the initial implementation, there are a set of classes for
>> specifying fitness functions, expressing genes and implementing gene
>> manipulations. There is a top-level simulation object that run the
>> various number of generations. My plan was to try using the java
>> native interface to use the existing Java classes for organisms and
>> fitness, and rewrite the top level simulation in X10.
>>
>> I have been evaluating X10 for purely numeric applications on our
>> cluster (C++ back end, MPI runtime and mpiexec as a process
>> launcher). I believe I read somewhere that the Java native
>> interface requires the Java back end. In that case, I'd need to
>> make sure we could run the sockets runtime and whatever process
>> launcher we have for java (x10run?).
>>
>> Anyone have any advice?
>>
>
> Following up on what Igor said, I'd suggest going with your plan of writing
> the top level simulation in X10, but instead of using JNI, try to use the
> multi-place Java implementation of X10 and call the Java generic algorithm
> from X10 compiled to Java.
So, that is like section 18.3 of the language spec ("External Java Code") as
opposed to section 18.2 ("Native Blocks"). Are there examples of this in the
regression tests?
Thanks,
Dave
>
> We're kicking off an activity over the summer to make the X10/Java
> interoperability even more user-friendly, so this could be an interesting
> case study for us. Let us know if you run into problems.
>
> We've also been making some nice improvements (post 2.2 release) in the
> performance of the multi-JVM implementation of X10. So once your code is
> working, if there are communication related performance problems, we could
> also work with you to try it on the development branch we have going right
> now to work on multi-JVM serialization performance.
>
> --dave
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---
David E. Hudak, Ph.D. dhu...@osc.edu
Program Director, HPC Engineering
Ohio Supercomputer Center
http://www.osc.edu
------------------------------------------------------------------------------
All the data continuously generated in your IT infrastructure contains a
definitive record of customers, application performance, security
threats, fraudulent activity and more. Splunk takes this data and makes
sense of it. Business sense. IT sense. Common sense..
http://p.sf.net/sfu/splunk-d2d-c1
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