Developer Reference

  • 2021.1
  • 12/04/2020
  • Public Content
Contents

blacs_freebuff

Frees BLACS buffer.

Syntax

call blacs_freebuff
(
icontxt
,
wait
)
Input Parameters
icontxt
INTEGER
. Integer handle that indicates the BLACS context.
wait
INTEGER
. Parameter indicating whether to wait for non-blocking operations or not. If equals 0, the operations should not be waited for; free only unused buffers. Otherwise, wait in order to free all buffers.
Description
This routine releases the BLACS buffer.
The BLACS have at least one internal buffer that is used for packing messages. The number of internal buffers depends on what platform you are running the BLACS on. On systems where memory is tight, keeping this buffer or buffers may become expensive. Call
freebuff
to release the buffer. However, the next call of a communication routine that requires packing reallocates the buffer.
The
wait
parameter determines whether the BLACS should wait for any non-blocking operations to be completed or not. If
wait
= 0, the BLACS free any buffers that can be freed without waiting. If
wait
is not 0, the BLACS free all internal buffers, even if non-blocking operations must be completed first.

Product and Performance Information

1

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