Developer Reference for Intel® oneAPI Math Kernel Library - C

Developer Reference

  • 0.9
  • 09/09/2020
  • Public Content
Contents

blacs_barrier

Holds up execution of all processes within the indicated scope.

Syntax

call blacs_barrier
(
icontxt
,
scope
)
Input Parameters
icontxt
INTEGER
. Integer handle that indicates the context.
scope
CHARACTER*1
. Parameter that indicates whether a process row (
scope
='R'
), column (
'C'
), or entire grid (
'A'
) will participate in the barrier.
Description
This routine holds up execution of all processes within the indicated scope until they have all called the routine.

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