Hi,
I have a array distributed on 2 places and I want to copy a line of array
coefficients to another line
(i.e. a(0, j) <- a(1, j) for j=0 to 9). Both lines are on different places.
What is the preffered way to do that ?
Below there is a small example (each value is transfered separately).
It works, but I find my solution neither elegant neither efficient.
Suggestions are welcome.
Thanks in advance.
Marc
//=========================================================
// example
import x10.io.Console;
import x10.util.Timer;
public value test10
{
public static def println(s:String) = Console.OUT.println(s);
public static def print(s:String) = Console.OUT.print(s);
public static def now():double = Timer.nanoTime() * 1e-9;
val a:Array[double];
def this() {
R : Region = Region.makeRectangular([0,0], [1,9]);
D : Dist = Dist.makeCyclic(R, 0);
a = Array.make[double](D, ((i,j):Point) => 10*i+j as Double) ;
}
def output(val s : String) {
println("\n" + s);
for (p in a.dist.places())
at (p) {
println("place : " + here);
for ((i,j): Point in a.dist.get(p))
print(" " + a([i,j]));
println("");
}
}
def transfert() {
for ((i,j): Point in a.dist.get(Place.places(0)))
a([i,j]) = at (Place.places(1)) a([1-i,j]);
}
static public def main(args : Rail[String]) {
t:test10 = new test10();
t.output("before copy");
t.transfert();
t.output("after copy");
}
}
------------------------------------------------------------------------------------
Marc Tajchman
Laboratoire de Génie Logiciel et de Simulation
Software Engineering and Computer Simulation Laboratory
CEA-DEN/DANS/DM2S/SFME/LGLS
Tél : +33/1 69 08 73 27
Fax : +33/1 69 08 52 42
mailto:marc.tajch...@cea.fr
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-------- Message d'origine--------
De: TAJCHMAN Marc
Date: dim. 20/09/2009 12:30
À: x10-users@lists.sourceforge.net
Objet : Help for distributed arrays
Hi everyone,
Thanks for helping me on previous messages (especially Igor).
Below are 2 versions of a test (defining and accessing a distributed array on
several places).
This is a variation of an example code from X10 distribution
(EncapsulatedArray2D).
The first version is (apparently) working well but the second one launches
several x10.lang.BadPlaceException.
The differences are :
- first version : the distributed array is created and accessed only from the
static main function
- second version : the array is now a member of the class containing the main
function. It's created inside the class constructor and accessed from other
class method.
Thanks a lot for any suggestion.
Marc
// =====================================================
// working code
public class test8 {
static def println(s:String) = Console.OUT.println(s);
static def print(s:String) = Console.OUT.print(s);
static value bloc{
val m_array: Array[double];
def this(val a_array: Array[double]): bloc = {
m_array=a_array;
}
def init(val i:int) : Void = {
for (val (j): Point(1) in m_array)
m_array([j])= 10*j + i;
}
def output() : Void = {
for (val (j): Point(1) in m_array) {
println(" "+j+" : " + m_array([j]));
}
}
}
public static def main(a: Rail[String]) : void {
val R : Region = [1..5];
val r : Region = [1..3];
val D = Dist.makeCyclic(R, 0);
val A = Array.make[bloc]
(D, (p:Point) =>
new bloc(Array.make[double](r->here,(Point)=>0.0D)));
finish ateach (val (i): Point in D)
A([i]).init(i);
for (val p in A.dist.places())
at(p) {
val r : Region = A.dist.get(here);
for ((i): Point in r) {
println("subdomain "+i+" place = "+ here);
A([i]).output();
println("");
}
}
}
}
// ========================================================
// non working version
public class test8c {
val A : Array[bloc];
static def println(s:String) = Console.OUT.println(s);
static def print(s:String) = Console.OUT.print(s);
static value bloc{
val m_array: Array[double];
def this(val a_array: Array[double]): bloc = {
m_array=a_array;
}
def init(val i:int) : Void = {
for (val (j): Point(1) in m_array)
m_array([j])= 10*j + i;
}
def output() : Void = {
for (val (j): Point(1) in m_array) {
println(" "+j+" : " + m_array([j]));
}
}
}
def init() {
finish ateach (val (i): Point in A.dist)
A([i]).init(i);
}
def output() {
for (val p in A.dist.places())
at(p) {
val r : Region = A.dist.get(here);
for ((i): Point in r) {
println("subdomain "+i+" place = "+ here);
A([i]).output();
println("");
}
}
}
def this() {
val R : Region = [1..5];
val r : Region = [1..3];
val D = Dist.makeCyclic(R, 0);
A = Array.make[bloc]
(D, (p:Point) =>
new bloc(Array.make[double](r->here,(Point)=>0.0D)));
}
public static def main(a: Rail[String]) : void {
val t : test8c = new test8c();
t.init();
t.output();
}
}
------------------------------------------------------------------------------
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