petsc-3.14.5 2021-03-03
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# PetscViewerSAWsOpen

Opens an SAWs PetscViewer.

### Synopsis

    #include "petscsys.h"  */
    PetscErrorCode PetscViewerSAWsOpen(MPI_Comm comm,PetscViewer *lab)

Collective

### Input Parameters

| comm | - the MPI communicator

### Output Parameter

| lab | - the PetscViewer

### Options Database Keys

| -saws_port <port number> | - port number where you are running SAWs client
| -xxx_view saws | - publish the object xxx
| -xxx_saws_block | - blocks the program at the end of a critical point (for KSP and SNES it is the end of a solve) until the user unblocks the problem with an external tool that access the object with SAWS

### Fortran Note

This routine is not supported in Fortran.

### Notes

Unlike other viewers that only access the object being viewed on the call to XXXView(object,viewer) the SAWs viewer allows one to view the object asynchronously as the program continues to run. One can remove SAWs access to the object with a call to PetscObjectSAWsViewOff().

Information about the SAWs is available via https://bitbucket.org/saws/saws

### See Also

PetscViewerDestroy(), PetscViewerStringSPrintf(), PETSC_VIEWER_SAWS_(), PetscObjectSAWsBlock(),
PetscObjectSAWsViewOff(), PetscObjectSAWsTakeAccess(), PetscObjectSAWsGrantAccess()

### Level

advanced

### Location

src/sys/classes/viewer/impls/ams/amsopen.c
Index of all Viewer routines
Table of Contents for all manual pages
Index of all manual pages