Reduce - Revision history

Polas: 6 revisions imported

2019-04-15T15:44:35Z

6 revisions imported

Polas at 14:25, 15 April 2013

2013-04-15T14:25:00Z

Polas at 18:24, 13 January 2013

2013-01-13T18:24:25Z

Polas at 17:54, 12 January 2013

2013-01-12T17:54:28Z

Polas at 17:27, 12 January 2013

2013-01-12T17:27:02Z

Polas at 17:26, 12 January 2013

2013-01-12T17:26:42Z

Polas: Created page with '== Syntax == reduce[root,operation] == Semantics == All processes in the group will combine their values together at the root process and then the operation will be performed …'

2010-01-10T19:27:39Z

Created page with '== Syntax == reduce[root,operation] == Semantics == All processes in the group will combine their values together at the root process and then the operation will be performed …'

New page

== Syntax ==

reduce[root,operation]

== Semantics ==

All processes in the group will combine their values together at the root process and then the operation will be performed on them. Numerous operations are supported, such as sum, min, max, multiply.

== Example ==

var t:Int::allocated[multiple[]];
var x:Int::allocated[multiple[]];
var p;
par p from 0 to 3
{
x:(x::reduce[1,"max"];
x:=p;
t:=x;
};

In this example, ''x'' is to be reduced, with the root as process 1 and the operation will be to find the maximum number. In the first assignment ''x:=p'' all processes will combine their values of ''p'' and the maximum will be placed into process 1's ''x''. In the second assignment ''t:=x'' processes will combine their values of ''x'' and the maximum will be placed into process 1's ''t''.

[[Category:Type Library]]
[[Category:Composite Types]]
[[Category:Primitive Communication Types]]

← Older revision		Revision as of 18:24, 13 January 2013
Line 19:		Line 19:

	In this example, ''x'' is to be reduced, with the root as process 1 and the operation will be to find the maximum number. In the first assignment ''x:=p'' all processes will combine their values of ''p'' and the maximum will be placed into process 1's ''x''. In the second assignment ''t:=x'' processes will combine their values of ''x'' and the maximum will be placed into process 1's ''t''.		In this example, ''x'' is to be reduced, with the root as process 1 and the operation will be to find the maximum number. In the first assignment ''x:=p'' all processes will combine their values of ''p'' and the maximum will be placed into process 1's ''x''. In the second assignment ''t:=x'' processes will combine their values of ''x'' and the maximum will be placed into process 1's ''t''.
		+
		+	''Since: Version 0.41b''

	== Supported operations ==		== Supported operations ==

← Older revision	Revision as of 15:44, 15 April 2019
(No difference)

@@ Line 9: / Line 9: @@
 == Example ==
-  var t:Int::allocated[multiple[]];
+  function void main() {
- var x:Int::allocated[multiple[]];
+    var t:Int::allocated[multiple[]];
- var p;
+    var x:Int::allocated[multiple[]];
- par p from 0 to 3 {
+    var p;
-    x:(x::reduce[1,"max"];
+    par p from 0 to 3 {
-    x:=p;
+       x:(x::reduce[1,"max"];
-    t:=x;
+       x:=p;
   };

@@ Line 25: / Line 25: @@
 [[Category:Type Library]]
-[[Category:Composite Types]]
+[[Category:Compound Types]]
 [[Category:Primitive Communication Types]]