Developer Reference

Contents

blacs_pcoord

Returns the row and column coordinates in the process grid.

Syntax

call blacs_pcoord
(
icontxt
,
pnum
,
prow
,
pcol
)
Input Parameters
icontxt
INTEGER
. Integer handle that indicates the context.
pnum
INTEGER
. Process number the coordinates of which are to be determined. This parameter stand for the process number of the underlying machine, that is, it is a
tid
for PVM.
Output Parameters
prow
INTEGER
. Row coordinates of the
pnum
process in the BLACS grid.
pcol
INTEGER
. Column coordinates of the
pnum
process in the BLACS grid.
Description
Given the system process number, this function returns the row and column coordinates in the BLACS process grid.

Product and Performance Information

1

Intel's compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors. These optimizations include SSE2, SSE3, and SSSE3 instruction sets and other optimizations. Intel does not guarantee the availability, functionality, or effectiveness of any optimization on microprocessors not manufactured by Intel. Microprocessor-dependent optimizations in this product are intended for use with Intel microprocessors. Certain optimizations not specific to Intel microarchitecture are reserved for Intel microprocessors. Please refer to the applicable product User and Reference Guides for more information regarding the specific instruction sets covered by this notice.

Notice revision #20110804