Developer Reference for Intel® oneAPI Math Kernel Library for Fortran

ID 766686
Date 3/31/2023
Public

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?gebs2d

Starts a broadcast along a scope for a general rectangular matrix.

Syntax

call igebs2d( icontxt, scope, top, m, n, a, lda )

call sgebs2d( icontxt, scope, top, m, n, a, lda )

call dgebs2d( icontxt, scope, top, m, n, a, lda )

call cgebs2d( icontxt, scope, top, m, n, a, lda )

call zgebs2d( icontxt, scope, top, m, n, a, lda )

Input Parameters

icontxt

INTEGER. Integer handle that indicates the context.

scope

CHARACTER*1. Indicates what scope the broadcast should proceed on. Limited to 'Row', 'Column', or 'All'.

top

CHARACTER*1. Indicates the communication pattern to use for the broadcast.

m, n, a, lda

Describe the matrix to be sent. See Matrix Shapes for details.

Description

This routine starts a broadcast along a scope. All other processes within the scope must call broadcast/receive for the broadcast to proceed. At the end of a broadcast, all processes within the scope will possess the data in the general rectangular matrix A.

Broadcasts may be globally-blocking. This means no process is guaranteed to return from a broadcast until all processes in the scope have called the appropriate routine (broadcast/send or broadcast/receive).