Merge branch 'haplav/fix-deadlock-failed-VecLoad' [PR #905]

* haplav/fix-deadlock-failed-VecLoad:
Fixes a hang observed in KSP tutorial ex27 when loading the initial guess from file.

Viewer+HDF5: Allow reading string attributes

Viewer+HDF5: Now attributes can be associated with an arbitrary object
Contributed-by: Mari Pecha <marek.pecha@vsb.cz>

Cosmetic change in PetscViewerFileSetUp_Binary().

Avoid redundant check for existence of file. Not totally needed but nicer.

Fix in PetscViewerFileSetUp_Binary() to avoid hang in ex27.

Merged in dalcinl/feature-mpiio (pull request #900)

Enhancements to MPI I/O support

Approved-by: BarryFSmith <bsmith@mcs.anl.gov>

MPI I/O: Support for binary subviewers

Merge remote-tracking branch 'origin/knepley/fix-snes-ex69' into tisaac/feature-dmfield

* origin/knepley/fix-snes-ex69: (311 commits)
PetscFECreateDefault: fix custom Fortran interface to use MPI_

Merge remote-tracking branch 'origin/knepley/fix-snes-ex69' into tisaac/feature-dmfield

* origin/knepley/fix-snes-ex69: (311 commits)
PetscFECreateDefault: fix custom Fortran interface to use MPI_Comm
SNES ex69: Updated test output
SNES ex69: Removed all mantle stuff and change fields to constants - Also use dsymutil for executables
SNES ex69: Removed special partition
SNES ex69: Fixed null space creation - Null space locks its vectors
PetscFE: PetscFECreateDefault() now takes MPI_Comm instead of DM
cleanup very ugly PCGAMG manual page
minor clarifications for VecScatterCreate() manual page
gcov: PETSC_ARCH is required onlyfor -run_gcov - and not for -merge_gcov [where it doesn't exist]
make clearer in help statements what --with-external-packages-dir is for.
Website: Added news entry for PETSc User Meeting 2018 on main page.
CUDA: Further test output fixes for mat_tests-ex2
Turn off elemental test for parmetis running since this does not work on batch systems.
3.8 Changes: KSPCHEBYSHEV
CUDA: Fixed most test errors due to MatMultTranspose*
website: update urls
website: fix Jason's name to match pic. Also add Todd's pic
Dev manual: copyedit
DMPlexDistributeLabels: Propagate the output flag
cuda/cusp: update minimum supported versions of cuda to 7.5 and cusp to 0.5.0
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PetscViewerFileSetName_VTK: Do not use PetscViewerPushFormat()

There is no point for this call to consume one entry of the format stack.
We could use PetscViewerSetFormat() but it was deprecated lon

PetscViewerFileSetName_VTK: Do not use PetscViewerPushFormat()

There is no point for this call to consume one entry of the format stack.
We could use PetscViewerSetFormat() but it was deprecated long ago.

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PetscOptionsGetViewer: Get VTK format from viewer if not specified

PetscViewerSetName() for the VTK viewer pushes a specific VTK format
chosen from the file extension, so let's use as a better defau

PetscOptionsGetViewer: Get VTK format from viewer if not specified

PetscViewerSetName() for the VTK viewer pushes a specific VTK format
chosen from the file extension, so let's use as a better default.

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PETSCVIEWERVTK: Remove unused slot from the PetscViewer_VTK struct.

PETSCVIEWERVTK: Add support for PetscViewerGet{Name|Mode}

PetscViewerFileGetName: Add missing error checking for `name` argument

DMField: c++/complex fixes

PetscViewerGetSubViewer: Fix for binary viewers

Turn on the setupcalled flag on the output subviewer, otherwise the
subviewer eventually opens a new file descriptor to the same file.

Merge branch 'maint'

ftn: add interface for PETSC_VIEWER_DRAW_()

Requested-by: Tim Steinhoff <kandanovian@gmail.com>

Change PetscStrncat() to PetscStrlcat() to match BSD API where l represents total length

Update many uses of PetscStrcpy() and PetscStrcat() to the safer PetscStrncpy() and PetscStrlcat()

Commit-ty

Change PetscStrncat() to PetscStrlcat() to match BSD API where l represents total length

Update many uses of PetscStrcpy() and PetscStrcat() to the safer PetscStrncpy() and PetscStrlcat()

Commit-type: style-fix, feature
Thanks-to: Jed Brown

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Redefine how the n in PetscStrncat() works to make it more useful and not require tracking the current string size

Commit-type: feature

PETSCVIEWERGLVIS: fix documentation

PETSCVIEWERGLVIS: Fix defaults for constructor

DMDA defaults to left-looking, that matches the layout obtained from DMDAGetElements

Add code for automatically checking if shell matrix vector and transpose matrix vector products work with TS

Added MatShellTestMult(), MatShellTestMultTranspose(), TSRHSJacobianTest(), and TSRHSJaco

Add code for automatically checking if shell matrix vector and transpose matrix vector products work with TS

Added MatShellTestMult(), MatShellTestMultTranspose(), TSRHSJacobianTest(), and TSRHSJacobianTestTranspose()

Commit-type: feature

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PETSCVIEWERGLVIS: use PETSC_COMM_SELF for local viewers

Merge branch 'maint'

Add viewer format object for displaying load imbalance of vectors and nonzeros in sparse MPIAIJ matrices

Could be extended to DMs include DMDA and DMPlex

Commit-type: feature
Thanks-to: Fande Kong

Add viewer format object for displaying load imbalance of vectors and nonzeros in sparse MPIAIJ matrices

Could be extended to DMs include DMDA and DMPlex

Commit-type: feature
Thanks-to: Fande Kong <fande.kong@inl.gov>

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