Difference between revisions of "Par"
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== Semantics == | == Semantics == | ||
| − | The parallel equivalent of the for loop, each iteration will execute concurrently on different processes. This allows the programmer to write code MPMD style, with the limitation that bounds ''a'' and ''b'' must be known during compilation. | + | The parallel equivalent of the for loop, each iteration will execute concurrently on different processes. This allows the programmer to write code MPMD style, with the limitation that bounds ''a'' and ''b'' must be known during compilation. Variables declared to be multiply allocated within parallel scope, such as a par block, will automatically be allocated just to the subgroup of processes within that scope. |
== Example == | == Example == | ||
| + | #include <io> | ||
var p; | var p; | ||
| − | par p from 0 to | + | par p from 0 to 9 { |
| − | + | print("Hello world\n"); | |
| − | print | ||
}; | }; | ||
| − | The code fragment will | + | The code fragment will involve 10 processes (0 to 9 inclusive) and each will display a ''Hello world'' message. |
[[Category:Parallel]] | [[Category:Parallel]] | ||
Revision as of 13:22, 12 January 2013
Syntax
par p from a to b
{
par body
};
Semantics
The parallel equivalent of the for loop, each iteration will execute concurrently on different processes. This allows the programmer to write code MPMD style, with the limitation that bounds a and b must be known during compilation. Variables declared to be multiply allocated within parallel scope, such as a par block, will automatically be allocated just to the subgroup of processes within that scope.
Example
#include <io>
var p;
par p from 0 to 9 {
print("Hello world\n");
};
The code fragment will involve 10 processes (0 to 9 inclusive) and each will display a Hello world message.
