blacs_gridinfo
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.