how to use PetscMap?

[Yixun Liu]

Hi,
For example, if N is known,  I call PetscSplitOwnership(PETSC_COMM, PETSC_DECIDE ,  &N) . However, how to get the start and end value like PetscMapGetLocalRange？

Best,

Yixun

----- Original Message ----- 
From: "Matthew Knepley" <knepley at gmail.com>
To: <petsc-users at mcs.anl.gov>
Sent: Thursday, November 02, 2006 10:27 PM
Subject: Re: how to use PetscMap?


> http://www-unix.mcs.anl.gov/petsc/petsc-as/snapshots/petsc-current/docs/manualpages/Sys/PetscSplitOwnership.html
> 
>   Matt
> 
> On 11/2/06, Yixun Liu <yxliu at fudan.edu.cn> wrote:
>> Hi,
>>
>> I want to use PetscMap to gets the range of values owned by this process, e.g.,PetscMapGetLocalRange(map,&Istart,&Iend). Then according to Istart and Iend to determine the parameters used by MatCreateMPIAIJ to create a matrix.
>>
>> Best,
>>
>> Yixun
>>
>> ----- Original Message -----
>> From: "Matthew Knepley" <knepley at gmail.com>
>> To: <petsc-users at mcs.anl.gov>
>> Sent: Thursday, November 02, 2006 9:56 PM
>> Subject: Re: how to use PetscMap?
>>
>>
>> > There is no replacement. What are you tring to do here?
>> >
>> >   Matt
>> >
>> > On 11/2/06, Yixun Liu <yxliu at fudan.edu.cn> wrote:
>> >> Hi,
>> >>
>> >> I want to change the code, which is based on old version PETSC to version 2.3.2. The old petsc code are,
>> >>
>> >> PetscMap map;
>> >> ierr = PetscMapCreateMPI(PETSC_COMM_WORLD,PETSC_DECIDE,n,&map);CHKERRQ(ierr);
>> >> ierr = PetscMapGetLocalRange(map,&Istart,&Iend); CHKERRQ(ierr);
>> >> ierr = PetscMapDestroy(map); CHKERRQ(ierr);
>> >>
>> >> If 2.3.2 does not support PetscMap, which class should I use?
>> >>
>> >> Best,
>> >>
>> >> Yixun
>> >>
>> >>
>> >>
>> >> ----- Original Message -----
>> >> From: "Matthew Knepley" <knepley at gmail.com>
>> >> To: <petsc-users at mcs.anl.gov>
>> >> Sent: Thursday, November 02, 2006 9:07 PM
>> >> Subject: Re: how to use PetscMap?
>> >>
>> >>
>> >> > No, in 2.3.2 PetscMap no longer exists.
>> >> >
>> >> >   Matt
>> >> >
>> >> > On 11/2/06, Yixun Liu <yxliu at fudan.edu.cn> wrote:
>> >> >>
>> >> >>
>> >> >> Hi,
>> >> >>
>> >> >> I reveive the error as,
>> >> >>
>> >> >> [0]PETSC ERROR:
>> >> >> ------------------------------------------------------------------------
>> >> >> [0]PETSC ERROR: Caught signal number 11 SEGV: Segmentation Violation,
>> >> >> probably memory access out of range
>> >> >> [0]PETSC ERROR: Try option -start_in_debugger or -on_error_attach_debugger
>> >> >> [0]PETSC ERROR: or see
>> >> >> http://www.mcs.anl.gov/petsc/petsc-as/documentation/troubleshooting.html#Signal[0]PETSC
>> >> >> ERROR: or try http://valgrind.org on linux or man libgmalloc on Apple to
>> >> >> find memory corruption errors
>> >> >> [0]PETSC ERROR: likely location of problem given in stack below
>> >> >> [0]PETSC ERROR: ---------------------  Stack Frames
>> >> >> ------------------------------------
>> >> >> [0]PETSC ERROR: Note: The EXACT line numbers in the stack are not available,
>> >> >> [0]PETSC ERROR:       INSTEAD the line number of the start of the function
>> >> >> [0]PETSC ERROR:       is given.
>> >> >> [0]PETSC ERROR: [0] PetscMapInitialize line 41
>> >> >> src/vec/vec/impls/mpi/d:\MyVC\PETSC-~1.2-P\src\vec\vec\impls\mpi\pmap.c
>> >> >> [0]PETSC ERROR: --------------------- Error Message
>> >> >> ------------------------------------
>> >> >> [0]PETSC ERROR: Signal received!
>> >> >> [0]PETSC ERROR:
>> >> >> ------------------------------------------------------------------------
>> >> >> [0]PETSC ERROR: Petsc Release Version 2.3.2, Patch 3, Fri Sep 29 17:09:34
>> >> >> CDT 2006 HG revision:
>> >> >> 9215af156a9cbcdc1ec666e2b5c7934688ddc526
>> >> >> [0]PETSC ERROR: See docs/changes/index.html for recent updates.
>> >> >> [0]PETSC ERROR: See docs/faq.html for hints about trouble shooting.
>> >> >> [0]PETSC ERROR: See docs/index.html for manual pages.
>> >> >> [0]PETSC ERROR:
>> >> >> ------------------------------------------------------------------------
>> >> >> [0]PETSC ERROR: Unknown Name on a cygwin-cx named DMRC-6700512 by DMRC-user
>> >> >> Thu Nov 02 16:22:47 2006
>> >> >> [0]PETSC ERROR: Libraries linked from
>> >> >> /cygdrive/D/MyVC/petsc-2.3.2-p3/lib/cygwin-cxx-debug
>> >> >> [0]PETSC ERROR: Configure run at Wed Nov  1 10:08:10 2006
>> >> >> [0]PETSC ERROR: Configure options
>> >> >> --with-mpi-dir=/cygdrive/d/MPICH2 --with-cc="win32fe cl"
>> >> >> --with-fc=0 --with-cxx="win32fe cl" --with-clanguage=cxx
>> >> >> --with-blas-lapack-dir=/cygdrive/D/MyVC/petsc-2.3.2-p3/externalpackages/w_mkl_serial_p_8.1.001/mkl_serial_8.1/mkl_8.1_serial/ia32/lib
>> >> >> COPTFLAGS="-MD -Z7" CXXOPTFLAGS="-MD -Z7" --useThreads=0 --with-shared=0
>> >> >> [0]PETSC ERROR:
>> >> >> ------------------------------------------------------------------------
>> >> >> [0]PETSC ERROR: User provided function() line 0 in unknown directory unknown
>> >> >> file
>> >> >> unable to read the cmd header on the pmi context, Undefined dynamic error
>> >> >> code.
>> >> >>
>> >> >> job aborted:
>> >> >> rank: node: exit code[: error message]
>> >> >> 0: dmrc-6700512: 59: application called MPI_Abort(MPI_COMM_WORLD, 59) -
>> >> >> process 0
>> >> >>
>> >> >> I think this error maybe caused by these codes,
>> >> >>
>> >> >>  PetscMap *map;
>> >> >>  ierr = PetscMapInitialize(PETSC_COMM_WORLD, map);
>> >> >>  CHKERRQ(ierr);
>> >> >>  ierr = PetscMapSetSize (map, n);
>> >> >>  ierr = PetscMapGetLocalRange(map,&Istart,&Iend);
>> >> >> CHKERRQ(ierr);
>> >> >>
>> >> >> Is it correct to use the PetscMap like this?
>> >> >>
>> >> >> Best,
>> >> >>
>> >> >> Yixun
>> >> >>
>> >> >>
>> >> >>
>> >> >>
>> >> >
>> >> >
>> >> > --
>> >> > "Failure has a thousand explanations. Success doesn't need one" -- Sir
>> >> > Alec Guiness
>> >> >
>> >>
>> >>
>> >
>> >
>> > --
>> > "Failure has a thousand explanations. Success doesn't need one" -- Sir
>> > Alec Guiness
>> >
>>
>>
> 
> 
> -- 
> "Failure has a thousand explanations. Success doesn't need one" -- Sir
> Alec Guiness
>