Difference between revisions of "Alltoall"
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In this example each process sends every other process three elements (the elements in its ''r''.) Therefore each process ends up with twelve elements in ''x'', the location of each is based on the source processes's PID. | In this example each process sends every other process three elements (the elements in its ''r''.) Therefore each process ends up with twelve elements in ''x'', the location of each is based on the source processes's PID. | ||
| + | ''Since: Version 0.41b'' | ||
[[Category:Type Library]] | [[Category:Type Library]] | ||
[[Category:Compound Types]] | [[Category:Compound Types]] | ||
[[Category:Primitive Communication Types]] | [[Category:Primitive Communication Types]] | ||
Revision as of 18:15, 13 January 2013
Syntax
alltoall[elementsoneach]
Semantics
Will cause each process to send some elements (the number being equal to elementsoneach) to every other process in the group.
Example
x:array[Int,12]::allocated[multiple[]];
var r:array[Int,3]::allocated[multiple[]];
var p;
par p from 0 to 3
{
(x:alltoall[3]):=r;
};
In this example each process sends every other process three elements (the elements in its r.) Therefore each process ends up with twelve elements in x, the location of each is based on the source processes's PID.
Since: Version 0.41b
