PetscViewerFlowControlStart

Begin a flow-controlled viewer operation on the main MPI process

Synopsis

#include "petscviewer.h" 
PetscErrorCode PetscViewerFlowControlStart(PetscViewer viewer, PetscInt *mcnt, PetscInt *cnt)

Collective

Input Parameter

• viewer - the binary viewer

Output Parameters

• mcnt - the current flow-control counter on the main MPI process

• cnt - the flow-control window size (also read from the viewer)

Note

Used together with PetscViewerFlowControlStepMain() and PetscViewerFlowControlEndMain() on the main process (rank 0), and with PetscViewerFlowControlStepWorker() and PetscViewerFlowControlEndWorker() on the other processes, to serialize I/O work through a bounded window so that all processes do not simultaneously flood the main process with data.

See Also

PetscViewer, PetscViewerFlowControlStepMain(), PetscViewerFlowControlEndMain(), PetscViewerFlowControlStepWorker(), PetscViewerFlowControlEndWorker(), PetscViewerBinaryGetFlowControl()

Level

developer

Location

src/sys/classes/viewer/interface/viewreg.c

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Index of all Viewer routines
Table of Contents for all manual pages
Index of all manual pages