I spoke too soon. It compiled but didn't run. Still have the
BadPlaceExeption. This is the code:
//declared as Class members
var regionS: Region{rank==2};
var distS: Dist{rank==2};
var S: Array[Complex](distS);
//code from member method
regionS = [0..N-1, 0..Mc-1];
distS = Dist.makeBlock(regionS,0);
S = Array.make[Complex](distS,
(val (i,j):Point) => new Complex ( real(i*Mc+j), image(i*Mc+j)
) );
I'm still confused about the number of places. It shows 4 places
printing NativeRuntime.MAX_PLACES on my dual core machine. I'll attach
output from execution.
Jim
On 28 Aug 2009, at 8:29 PM, Josh Milthorpe wrote:
If I correctly understand the intent, you're trying to initialize
each element of S : Array[Complex] based on some values in the real
and image rails. However I don't think that's what the above code
achieves.
The outer loop iterates over all places included in distS. The
inner loop iterates over every point in the region of S. Because
distS is a block distribution over all places, this means that an
activity will be started at each place, and each activity will
attempt to assign to every element of S - including those elements
that reside at other places. I suspect that this is the cause of
the BPE.
(As an aside, S is not distributed, because distS is not used in the
initializer. To make it distributed, use
distS = Dist.makeBlock(distS,0);
rather than
distS = Dist.makeBlock(regionS,0);
)
You could initialize S in a single statement using an Array
initializer function, something like:
S = Array.make[Complex](distS, (val (i,j): Point) => new Complex
(real(i*Mc+j), image(i*Mc+j)));
This is what I was looking for but couldn't make it work. I don't know
what I had before, but this works. Thanks!
BTW is the use of "image" rather than "imaginary" an American vs.
British thing? I haven't heard this term used before.
I'm porting a benchmark someone else wrote in C. I'm just using the
same identifiers. Personally, I would have used "imag".
Jim
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