Developer Reference for Intel® oneAPI Math Kernel Library - C

Developer Reference

Contents

blacs_gridinfo

Returns information on the current grid.

Syntax

call blacs_gridinfo
(
icontxt
,
nprow
,
npcol
,
myprow
,
mypcol
)
Input Parameters
icontxt
INTEGER
. Integer handle that indicates the context.
Output Parameters
nprow
INTEGER
. Number of process rows in the current process grid.
npcol
INTEGER
. Number of process columns in the current process grid.
myprow
INTEGER
. Row coordinate of the calling process in the process grid.
mypcol
INTEGER
. Column coordinate of the calling process in the process grid.
Description
This routine returns information on the current grid. If the context handle does not point at a valid context, all quantities are returned as -1.

Product and Performance Information

1

Performance varies by use, configuration and other factors. Learn more at www.Intel.com/PerformanceIndex.