On 18-03-02 10:58 AM, Matthew Knepley wrote:
On Fri, Mar 2, 2018 at 1:41 PM, Danyang Su <danyang...@gmail.com
<mailto:danyang...@gmail.com>> wrote:
On 18-02-19 03:30 PM, Matthew Knepley wrote:
On Mon, Feb 19, 2018 at 3:11 PM, Danyang Su <danyang...@gmail.com
<mailto:danyang...@gmail.com>> wrote:
Hi Matt,
Would you please let me know how to check if a cell is local
owned? When overlap is 0 in DMPlexDistribute, all the cells
are local owned. How about overlap > 0? It sounds like
impossible to check by node because a cell can be local owned
even if none of the nodes in this cell is local owned.
If a cell is in the PetscSF, then it is not locally owned. The
local nodes in the SF are sorted, so I use
PetscFindInt
(http://www.mcs.anl.gov/petsc/petsc-current/docs/manualpages/Sys/PetscFindInt.html
<http://www.mcs.anl.gov/petsc/petsc-current/docs/manualpages/Sys/PetscFindInt.html>).
Hi Matt,
Would you please give me a little more about how to mark the ghost
cells when overlap > 0? What do you mean a cell is in the PetscSF?
I use PetscSFView to export the graph (original mesh file
pile.vtk) and it exports all the cells, including the ghost cells
(PETScSFView.txt).
Yes, I will send you some sample code when I get time. The first
problem is that you are looking at a different PetscSF. This looks
like the
one returned by DMPlexDistribute(). This is mapping the serial mesh to
the parallel mesh. You want
http://www.mcs.anl.gov/petsc/petsc-current/docs/manualpages/DM/DMGetPointSF.html
Then you can look at
https://bitbucket.org/petsc/petsc/src/1788fc36644e622df8cb1a0de85676ccc5af0239/src/dm/impls/plex/plexsubmesh.c?at=master&fileviewer=file-view-default#plexsubmesh.c-683
I get the pointSF, get out the list of leaves, and find points in it
using PetscFindInt()
Hi Matt,
By using the local dm, I can get the PetscSF I want, as shown below. Now
I need to get the number of ghost cells or local cells (here 4944) or
number of leaves (here 825) for each processor. I try to use
PetscSFGetGraph to get number of leaves in Fortran. After including
"petscsf.h", I got compilation error saying "You need a ISO C conforming
compiler to use the glibc headers". Is there any alternative way to do
this? I do not need the ghost-neighbor mapping, but just the number of
local owned cells.
[0] Number of roots=11449, leaves=825, remote ranks=1
[0] 4944 <- (1,0)
[0] 4945 <- (1,28)
[0] 4946 <- (1,56)
...
[1] Number of roots=11695, leaves=538, remote ranks=1
[1] 5056 <- (0,21)
[1] 5057 <- (0,43)
[1] 5058 <- (0,65)
[1] 5059 <- (0,87)
In file included from /usr/include/features.h:375:0,
from /usr/include/stdio.h:28,
from
/home/dsu/Soft/PETSc/petsc-3.8.3/include/petscsys.h:175,
from /home/dsu/Soft/PETSc/petsc-3.8.3/include/petscsf.h:7,
from ../../solver/solver_ddmethod.F90:4837:
/usr/include/x86_64-linux-gnu/sys/cdefs.h:30:3: error: #error "You need
a ISO C conforming compile\
r to use the glibc headers"
# error "You need a ISO C conforming compiler to use the glibc headers"
Thanks,
Danyang
Thanks,
Matt
Thanks,
Danyang
Thanks,
Matt
Thanks,
Danyang
--
What most experimenters take for granted before they begin their
experiments is infinitely more interesting than any results to
which their experiments lead.
-- Norbert Wiener
https://www.cse.buffalo.edu/~knepley/
<http://www.caam.rice.edu/%7Emk51/>
--
What most experimenters take for granted before they begin their
experiments is infinitely more interesting than any results to which
their experiments lead.
-- Norbert Wiener
https://www.cse.buffalo.edu/~knepley/ <http://www.caam.rice.edu/%7Emk51/>
