MPI_Allgather-nodes-short

The MPI_Allgather operation collects data from every node and concats the received data in one contigous buffer. In difference to the MPI_Gather operation, all nodes collect the data, not only a root process. We vary over the number of nodes. The messages have the length of 256 Bytes (for each node).

• 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))