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MPI_Alltoallv-nodes-short

The MPI_Alltoallv operation sends a message from every node to every node. In addition to the ``normal'' MPI_Alltoall operation here we able to specify which data from a process' sending buffer should be send to any other process (send displacement and send lengths) and we can specify where a process' data received from any other process should be stored (receive displacement and receives lengths). We vary over the number of nodes. The messages have the length of 256 Bytes (for each node).

\epsfig{file=col_MPI_Alltoallv-nodes-short.eps}
  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

next up previous contents
Next: MPI_Barrier-nodes Up: Collective-pattern Previous: MPI_Alltoallv-nodes-long   Contents
Per Ekman 2002-01-29