[This is preliminary documentation and is subject to change.]

A reduction operation that combines two values to produce a third value.

Namespace:  MPI
Assembly:  MPI (in MPI.dll)
Version: 0.9.0.0 (0.9.0.0)

Syntax

C#
public delegate T ReductionOperation<T>(
	T x,
	T y
)
Visual Basic (Declaration)
Public Delegate Function ReductionOperation(Of T) ( _
	x As T, _
	y As T _
) As T
Visual C++
generic<typename T>
public delegate T ReductionOperation(
	T x, 
	T y
)

Parameters

x
Type: T
y
Type: T

Type Parameters

T

Remarks

Reduction operations are used by various collective operations such as Allreduce<(Of <(T>)>)(T, ReductionOperation<(Of <(T>)>)). Note that any operation used as a reduction operation must be associative, e.g., op(x, op(y, z)) == op(op(x, y), z). These operations need not be commutative.

See Also