reuse rmap and cmap

bugfix: cannot exit when ismax=0 for one process!
simplify runex183_xxx

update MatGetSubMatricesMPI_MPIXAIJ() to work with optimized MatGetSubMatrices_MPIAIJ()

Merge branch 'hzhang/opt-matgetsubmatrices-mpiaij' of bitbucket.org:petsc/petsc into hzhang/opt-matgetsubmatrices-mpiaij

reuse row2proc

mv 'Allocate buffers for a->a' block to later part

optimize MatGetSubMatrices_MPIAIJ_Local() -- rm while-loop, not reuse yet

Merge branch 'barry/minor-cleanup'

Minor cleanup, remove some outdated code, remove unneeded constructs, improve manual pages slightly, add missing test case

Time: 2.5 hours

Merge branch 'barry/remove-funct'

Remove the use and definition of __FUNCT__ throughout the code

Since all modern C/C++ compilers provide this functionality we no longer need to provide it manually in PETSc
Time: 1.5 hours
Thanks-t

Remove the use and definition of __FUNCT__ throughout the code

Since all modern C/C++ compilers provide this functionality we no longer need to provide it manually in PETSc
Time: 1.5 hours
Thanks-to: Andreas Mang <andreas@ices.utexas.edu>

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Merge branch 'hzhang/opt-matgetsubmatrices-rebased-v2'

fix memory leak as reported by nightly tests

fix comment

fix typo in makefile reported by nightly tests; rm a loop of size np

use rmax as size of subcols and subvals

replace MatGetRow_MPIAIJ() with direct access to c->A and c->B arrays
final cleanup

replace MatGetRow_MPIAIJ() with direct access to c->A and c->B arrays

rm all while (row >= C->rmap->range[proc+1]) proc++;

use r2pmap to replace while-loop for finding proc for each row

bugfix for rmap_loc

implement MatGetSubMatrices_MPIAIJ_single() to optimize MatGetSubMatrices_MPIAIJ() when ismax = 1

update src/mat/examples/tests/ex4.c for testing MatGetSubMatrices()

introduce ctable to remove nons

implement MatGetSubMatrices_MPIAIJ_single() to optimize MatGetSubMatrices_MPIAIJ() when ismax = 1

update src/mat/examples/tests/ex4.c for testing MatGetSubMatrices()

introduce ctable to remove nonscalable malloc C->rmap->N array for MatIncreaseOverlap_MPIAIJ_Once()

remove nonscalable d_p by using ctable

add MAT_SUBMAT_SINGLEIS to MatOption. Set this flag in PCSetUp_ASM() to
reduce MPI_AllReduce() in MatGetSubMatrices()

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Merge branch 'master' into tisaac/dmplex-feature-real-to-ref

I need updated PetscFE interfaces in what I'm going to do

* master: (603 commits)
parmetis: fix typo in testsuite
Added PETSC_HAVE_A

Merge branch 'master' into tisaac/dmplex-feature-real-to-ref

I need updated PetscFE interfaces in what I'm going to do

* master: (603 commits)
parmetis: fix typo in testsuite
Added PETSC_HAVE_ATTRIBUTEALIGNED flag to makefile
PCSetUp_SVD() used incorrect matrix for matrix size in parallel, also need to skip LAPACK call if matrix size is zero
strumpack: update to latest version 1.0.4
Remove valgrind warning about MPI_Allreduce() with uninitialized data
sed for test output that has atol convergence with quad precision
updated ex1_nest tests
fixed incorrect key value
fix: bad merge a69d34a
test: move runex78 to TESTEXAMPLES_C_NOTSINGLE
build: fix warnings
sys: update test to produce same result - irrespective of debug/opt build - and presence of ~/.petscrc
sys: src/sys/examples/tests/ex30.c -> src/sys/examples/tests/ex32.c to avoid conflict in master
Sed output, since quad precision reduces below atol on these tests
remove automatically generated matrix names from test output files since can be different
Fixes for MatMPIXXXSetPreallocation(), they were not reentrant, since they kept the information used for matrix-vector products
GAMG: fix PCView_GAMG() format - and update output/ex56_0.out
superlu_dist: 64-bit-indices fix https://github.com/xiaoyeli/superlu_dist/issues/4
Add SNESSetDivergenceTolerance / -snes_divergence_tolerance.
fixed unit read in Plex
...

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Merge branch 'stefano_zampini/feature-convert-matnest-matis' into stefano_zampini/feature-pcbddc-saddlepoint

I have to merge it here, since there's an API addition for MatIS in stefano_zampini/featu

Merge branch 'stefano_zampini/feature-convert-matnest-matis' into stefano_zampini/feature-pcbddc-saddlepoint

I have to merge it here, since there's an API addition for MatIS in stefano_zampini/feature-pcbddc-saddlepoint
that prevents me to smoothly merge stefano_zampini/feature-convert-matnest-matis into next.

This will also facilitate merging stefano_zampini/feature-pcbddc-saddlepoint into master

Conflicts:
src/docs/website/documentation/changes/dev.html

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initialize variables so compiler doesn't think they may be used uninitialized