Dear Igor,
Thank you very much for your fast reply, I had another newbie question
please. I couldn't compile the following code:
public class Hello {
public static def main(var args: Rail[String]!) {
//Prt1
val h = new Hello();
val R:Region= [0..10];
val D:Dist(1)=Dist.makeBlock(R);;
val a :DistArray[int] =DistArray.make[int](D, ((i):Point)=>i);
finish ateach(i:Point in a.dist())
{
h.myPrint(a,i);
//Console.OUT.println("a("+i+"): " +here.id);
}
}
public def myPrint(a:DistArray[int](1),i:int)
{
Console.OUT.println("a("+i+"): " +a(i));
}
}
the problem is in the "myPrint" function, I think I'm missing out something.
Method myPrint(a: x10.array.DistArray[x10.lang.Int]{self.dist.region.rank==1},
i: x10.lang.Int) in Hello{self==h, h.home==_place19568819, h!=null} cannot
be called with arguments (x10.array.DistArray[x10.lang.Int]{self==a},
x10.array.Point{self==i}); Invalid Parameter.
expected type: x10.array.DistArray[x10.lang.Int
]{self.dist.region.rank==1}
found: x10.array.DistArray[x10.lang.Int]{self==a}
another this is that you told me in the last message to "*read the
instructions on the various transports that can be used by
the X10 C++ backend.*" where can I find such readings.
Thank you for your concern,
Regards,
Mohammed El Sayed
On Wed, Jun 30, 2010 at 9:55 AM, Igor Peshansky <ig...@us.ibm.com> wrote:
> mohammed elsaeedy <mohammed.elsae...@kaust.edu.sa> wrote on 06/30/2010
> 06:03:55 AM:
>
> > Dear all,
> >
> > I'm totally new to X10, and I'm intending to implement some linear
> > kernels with it, I have some questions that I hope you
> > could help me with, first, what is the Java and C++ back ends of the
> X10?
> > What is the difference? does this mean that the X10
> > code is ported to Java or C++ eventually? because if I'm going to
> compare my
> > linear kernels to MPI for example then I'll need to
> > make a fair comparison, i.e I can't compare Java to Fortran.
>
> Hi, Mohammed,
>
> Thank you for your interest in X10.
>
> The compilation strategy for X10 is to generate code in another language,
> Java or C++, which is then compiled or interpreted by the corresponding
> tools. So, the Java backend for X10 generates Java code and then uses the
> JVM to execute the generated program. The C++ backend generates C++
> source,
> which is then post-compiled by a C++ compiler (g++ or xlC) to the target
> architecture.
>
> At the moment, the C++ backend is the only one that supports multi-node
> execution (the Java backend is SMP-only until later this year). So, if
> you
> want to compare your X10 program with MPI code running in FORTRAN, then
> the
> C++ backend is your only option.
>
> Please read the instructions on the various transports that can be used by
> the X10 C++ backend. In particular, X10 can link to (and run on top of)
> MPI itself, as well as use more specialized transports for various
> architectures (e.g., BG/P).
>
> Let us know if you have more questions,
> Igor
> --
> Igor Peshansky (note the spelling change!)
> IBM T.J. Watson Research Center
> X10: Parallel Productivity and Performance (http://x10-lang.org/)
> XJ: No More Pain for XML's Gain (http://www.research.ibm.com/xj/)
> "I hear and I forget. I see and I remember. I do and I understand" --
> Confucius
>
>
>
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--
Thank you for your concern.
Regards,
Mohammed El Sayed
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