MPI_Gather-nodes-short

Next: MPI_Gather_ISWA-length Up: Collective-pattern Previous: MPI_Gather-nodes-long Contents

MPI_Gather-nodes-short

Using the MPI_Gather operation a root process collects data distributed on several nodes and writes the the received data in one contigious buffer. We vary over the number of nodes buffer. The messages have the length of 256 Bytes (for each node).

$\epsfig{file=col_MPI_Gather-nodes-short.eps}$

Pattern: Collective varied over number of nodes.
default values: 8 nodes, message length 256 units, max. / act. time for suite disabled/0.00 min.
Max. allowed standard error is 3.00 %.

	number of nodes
X axis scale	linear
Param. refinement	no automatic x wide adaption
Argument range	2 - 8 units (s. below)
Argument stepwidth	1.000000

Units: number, basetype 1 (MPI_INT), send-datatype 20: size 4 Bytes, extent 4 Bytes (user defined basetype 1 (MPI_INT)), receive-datatype 20: size 4 Bytes, extent 4 Bytes (user defined basetype 1 (MPI_INT))

Per Ekman 2002-01-29