Merge branch 'jolivet/backup-ksp-pc-compare' into 'main'

Lighter -ksp_view for PC[ASM|BJacobi] and SNESNASM w/o ::ascii_info_detail

Closes #838

See merge request petsc/petsc!3716

SNESView_NASM(): rm same_local_solves/use PVFormat

Only solver information from rank 0 are now displayed, even when calling
SNESNASMSetSubdomains(). To display solver information from all ranks,
use

SNESView_NASM(): rm same_local_solves/use PVFormat

Only solver information from rank 0 are now displayed, even when calling
SNESNASMSetSubdomains(). To display solver information from all ranks,
use PETSC_VIEWER_ASCII_INFO_DETAIL, e.g., -snes_view ::ascii_info_detail

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Merge branch 'barry/2020-10-08/fix-mpi-error-codes' into 'master'

Convert MPI error type to PETSc error with string message for all MPI calls

See merge request petsc/petsc!3326

Convert MPI error type to PETSc error with string message for all MPI calls

Now PETSc examples will ONLY return PETSc error codes and never MPI error codes directly so we can understand and post-pro

Convert MPI error type to PETSc error with string message for all MPI calls

Now PETSc examples will ONLY return PETSc error codes and never MPI error codes directly so we can understand and post-process their
errors better.

The test harness will now automatically retry tests that fail with MPI, this may help with Intel MPI that produces
seemingly random failures.

Commit-type: error-checking
/spend 30m

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Merge remote-tracking branch 'origin/dalcinl/fix-null'

TS/SNES/Tao: Fix 0 ->NULL for pointers

See merge request petsc/petsc!2783

SNES: Replace 0 -> NULL for pointers

Merge branch 'rmills/doc-misc-small-fixes' into 'master'

Rmills/doc misc small fixes

See merge request petsc/petsc!2070

Copy edits to SNESNASM manual page.

Capitalized "Jacobian" in SNESNASMSetComputeFinalJacobian() manual page.

Merged in jolivet/typo-Schwarz (pull request #1959)

Schwarz typos.

Ugly typos.

Merge branch 'jczhang/sf-more-opts' [PR #1567]

* jczhang/sf-more-opts:
Add more optimizations in SF and use it as the default for VecScatter.

Do not scatter to the same vector at the same time

In vecscatter, the target vector is write-locked

Merged in psanan/man-pages-remove-keywords (pull request #1717)

Man pages: Remove .keywords fields

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

Man pages: remove .keywords: fields

This field is recognized by doctext from Sowing (http://wgropp.cs.illinois.edu/projects/software/sowing/doctext/node20.htm#Node20),
but it doesn't seem to be unif

Man pages: remove .keywords: fields

This field is recognized by doctext from Sowing (http://wgropp.cs.illinois.edu/projects/software/sowing/doctext/node20.htm#Node20),
but it doesn't seem to be uniformly used or maintained.

Thus, remove all .keywords: fields, and a following blank line, if present.

This is accomplished with GNU sed (gsed on OS X), with the following commands.
*Warning* that this type of command can corrupt a .git directory,
so be cautious in reusing or modifying these commands. They first look
for and delete matching lines with a following line consisting of only whitespace,
and then delete any remaining matching lines.

find src/ -type f -exec gsed -i '/keywords:/ {N; /\n\s*$/d}' {} +
find src/ -type f -exec gsed -i '/keywords:/d' {} +
find include/ -type f -exec gsed -i '/keywords:/ {N; /\n\s*$/d}' {} +
find include/ -type f -exec gsed -i '/keywords:/d' {} +

Hints on the sed command obtained from: https://unix.stackexchange.com/questions/100754/how-to-delete-a-specific-line-and-the-following-blank-line-using-gnu-sed

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Merge remote-tracking branch 'origin/maint'

Merged in barry/fix-nasm-uses-ksp/maint (pull request #1557)

The SNESNASM nonlinear preconditioner doesn't ever use the KSP solver therefor should never turn on the usesksp flag. The setting of this

Merged in barry/fix-nasm-uses-ksp/maint (pull request #1557)

The SNESNASM nonlinear preconditioner doesn't ever use the KSP solver therefor should never turn on the usesksp flag. The setting of this flag made the SNESASPIN solver that uses the SNESNASM solver incorrectly have SNESNASM process the options for the KS

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The SNESNASM nonlinear preconditioner doesn't ever use the KSP solver therefor
should never turn on the usesksp flag. The setting of this flag made the SNESASPIN solver
that uses the SNESNASM solver

The SNESNASM nonlinear preconditioner doesn't ever use the KSP solver therefor
should never turn on the usesksp flag. The setting of this flag made the SNESASPIN solver
that uses the SNESNASM solver incorrectly have SNESNASM process the options for the
KSP and view it in SNESView() which could lead to users incorrectly believing the
solver was being used. Also added more text to the manual pages for these objects
to clarify how they function and interact with the Jacobian.

Commit-type: bug-fix, documentation

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Merge branch 'master' into wence/feature-patch-all-at-once

Merge branch 'Fande-Kong/feature-support-domainerror-in-compute-jacobian' [PR #1327]

* Fande-Kong/feature-support-domainerror-in-compute-jacobian:
Support domain errors in compute Jacobian

Support domain errors in SNESComputeJacobian

Merge branch 'master' into knepley/feature-plex-functionals

* master: (984 commits)
netcdf: set zlib as optional dependency corretly [wrt --enable-netcdf-4] - otherwise netcdf configure errors out

Merge branch 'master' into knepley/feature-plex-functionals

* master: (984 commits)
netcdf: set zlib as optional dependency corretly [wrt --enable-netcdf-4] - otherwise netcdf configure errors out
fix gcov obj path
-options_table was changed to options_view in 2014 but documentation was not updated to reflect it
configure: fix F2003 test
Dev manual: remove duplicate entry
Plex test ex5: Removed "future" test, as it resulted in issues in the nightly tests.
Some minor typos in TS
Add ADIOS2.py which I forgot to git add in the past
Plex ex5: Disable test
Doc: Added note for interface change
KSPLSQRMonitorDefault fixed for quad precision
Tao: Added alternative output for chwirut2 test.
TS ex45,ex46: Removed overly refined tests for faster nightly tests.
KSP ex72: Fixed needlessly long-running PCTFS tests.
SNES ex56: Reduced test size to speed up nightly test suite.
KSPSolve_LSQR: don't compute unused norm of rhs
SNES ex13: Reduced problem sizes for nightly tests.
PetscOptionsDeprecated(): fix for NULL prefix
PetscOptionsDeprecated(): add option to print additional info
SNES ex12: Reduced sizes for BDDC tests.
...

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Merge branch 'master' into knepley/feature-plex-elasticity-test

* master: (1553 commits)
-options_table was changed to options_view in 2014 but documentation was not updated to reflect it
config

Merge branch 'master' into knepley/feature-plex-elasticity-test

* master: (1553 commits)
-options_table was changed to options_view in 2014 but documentation was not updated to reflect it
configure: fix F2003 test
Plex test ex5: Removed "future" test, as it resulted in issues in the nightly tests.
Some minor typos in TS
Add ADIOS2.py which I forgot to git add in the past
Plex ex5: Disable test
Doc: Added note for interface change
KSPLSQRMonitorDefault fixed for quad precision
Tao: Added alternative output for chwirut2 test.
TS ex45,ex46: Removed overly refined tests for faster nightly tests.
KSP ex72: Fixed needlessly long-running PCTFS tests.
SNES ex56: Reduced test size to speed up nightly test suite.
KSPSolve_LSQR: don't compute unused norm of rhs
SNES ex13: Reduced problem sizes for nightly tests.
PetscOptionsDeprecated(): fix for NULL prefix
PetscOptionsDeprecated(): add option to print additional info
SNES ex12: Reduced sizes for BDDC tests.
PetscFileRetrieve(): Suppress output to STDERR when downloading a file.
MatMatMult: Fixed unused variable pN.
DMDestroy: Guard call to dm->ops->destroy * Similar guards are in place in many other methods (IS,Vec,Mat) and permit the DM to be destroyed even if DMSetType() was never called.
...

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Merge branch 'master' into knepley/feature-plex-parallel-submesh

* master: (2931 commits)
remove N in docs for SNESQN
replaced test tolerance with PETSC_SQRT_MACHINE_EPSILON
fortran: PetscComp

Merge branch 'master' into knepley/feature-plex-parallel-submesh

* master: (2931 commits)
remove N in docs for SNESQN
replaced test tolerance with PETSC_SQRT_MACHINE_EPSILON
fortran: PetscComplex type is missing from fortran
initialize variables so that static analyzer doesn't mistakenly think they are used uninitialized.
Move access of prefix until it is actually used
Remove DMDASplitComm2d(), used in one example that was not tested
Functions that do not return PetscErrorCode should not use PetscFunctionBegin/End paradgm
remove unneeded reassignment of same value
Missing CHKERRQ(); Mostly in Tao code
Remove clang static analyser warning about passing NULL variable to strncat()
missing newline in -ts_monitor_extreme
minor fixes for integer counters
Configure: Deal with '__func__' in C89 builds with newer Clang and GCC.
Jenkinsfile: Increased timeout for tests to 5 minutes.
3.9 changes: further clarify removal of -pc_factor_mat_solver_package
Options deprecations: add "PETSc" to inline warning
removing unused variable
MatShift support added to MATSUBMAT. Mimics MATSHELL functionality. Needed for matrix-free Hessians in TAO Newton-Line-Search methods.
Add -ts_monitor_extreme
Dev manual: add note on deprecating options database keys
...

Conflicts:
src/dm/impls/plex/examples/tests/ex4.c

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Merge branch 'master' into knepley/feature-pc-patch

* master: (562 commits)
fix clang-analyzer warning
Developers manual never use system randomizers in PETSc and example source code.
missing

Merge branch 'master' into knepley/feature-pc-patch

* master: (562 commits)
fix clang-analyzer warning
Developers manual never use system randomizers in PETSc and example source code.
missing CHKERRQ()
DT: Reverting the tgamma change broke MPFR - I guess we need a nightly build with it in
Add a test for ex21
Fix error in ex21
Add missing fortran interface that handles null objects
DMComposite: add missing guards
MatPreallocate: fix overpreallocation of local rows
style fixes
MatView_MPI_DA: do not print twice the class prefix
MatSetOperation: stash the original MatView_XXX in the viewnative function pointer
DMCreateInterpolation_DA gracefully error instead of catching FPE signals
MatIncreaseOverlap: preserve communicator of index sets
MatMPIAIJ: fix indentation and missing CHKERRQ
ISBuildTwoSided: remove tabs and fix style
Fix documentation
PetscViewerDraw: fix unininitialized warning from valgrind
MatConvert_SeqAIJ_SeqBAIJ: remove error for non square matrices and add MAT_REUSE_MATRIX case
Mat: MAT_INPLACE_MATRIX can be used for transposition with rectangular matrices
...

Conflicts:
src/dm/dt/interface/dtfe.c
src/dm/impls/plex/plex.c
src/dm/impls/plex/plexfem.c
src/snes/examples/tutorials/ex13.c
src/snes/examples/tutorials/ex62.c
src/snes/examples/tutorials/makefile
src/snes/examples/tutorials/output/ex62_18.out
src/snes/examples/tutorials/output/ex62_19.out
src/snes/examples/tutorials/output/ex62_20.out
src/snes/examples/tutorials/output/ex62_20_parmetis.out
src/snes/examples/tutorials/output/ex62_21.out
src/snes/examples/tutorials/output/ex62_22.out
src/snes/examples/tutorials/output/ex62_23.out
src/snes/examples/tutorials/output/ex62_24.out
src/snes/examples/tutorials/output/ex62_25.out
src/snes/examples/tutorials/output/ex62_26.out
src/snes/examples/tutorials/output/ex62_27.out
src/snes/examples/tutorials/output/ex62_28.out
src/snes/examples/tutorials/output/ex62_29.out
src/snes/examples/tutorials/output/ex62_2d_p3_1.out
src/snes/examples/tutorials/output/ex62_30.out
src/snes/examples/tutorials/output/ex62_31.out
src/snes/examples/tutorials/output/ex62_32.out
src/snes/examples/tutorials/output/ex62_33.out
src/snes/examples/tutorials/output/ex62_34.out
src/snes/examples/tutorials/output/ex62_35.out
src/snes/examples/tutorials/output/ex62_36.out
src/snes/examples/tutorials/output/ex62_pc_simple.out
src/snes/examples/tutorials/output/ex62_pc_simplec.out
src/snes/examples/tutorials/output/ex62_quad_q2p1_full.out
src/snes/examples/tutorials/output/ex62_quad_q2q1_full.out
src/snes/utils/dmplexsnes.c

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