[petsc-dev] PETSC_COMM_SELF == 0

[Matthew Knepley]

On Tue, Mar 31, 2015 at 3:05 PM, Mark Adams <mfadams at lbl.gov> wrote:

> Humm, that is what I see (appended).  I put a print in PETSC and see this
> but I still have PETSC_COMM_SELF==0 in my fortran code.
>

Is it possible that you do not have the right #include? Can you put exactly
the same includes as ex61f

  Matt


> Strange, the compile lines look close enough and the example ex61f sees a
> good PETSC_COMM_SELF ...
>
> Mark
>
> (gdb) where
> #0  PetscInitializeFortran () at
> /Users/markadams/Codes/petsc/src/sys/objects/ftn-custom/zstartf.c:48
> #1  0x000000010027d985 in petscinitialize_ (filename=0x101eaab40 "",
> ierr=0x7fff5fbff18c, len=80) at
> /Users/markadams/Codes/petsc/src/sys/objects/ftn-custom/zstart.c:398
> #2  0x00000001000015b2 in tpetsc () at ex61f.F90:111
> #3  0x0000000100002a3d in main (argc=1, argv=0x7fff5fbff968
> "/Users/markadams/Codes/petsc/src/ksp/ksp/examples/tutorials/ex61f") at
> ex61f.F90:60
> Current language:  auto; currently minimal
> (gdb) n
> 50        if (PETSC_COMM_WORLD) c1 =  MPI_Comm_c2f(PETSC_COMM_WORLD);
> (gdb) p c1
> $1 = 0
> (gdb) n
> 51        c2 =  MPI_Comm_c2f(PETSC_COMM_SELF);
> (gdb) p c1
> $2 = 1140850688
> (gdb)
>
> On Tue, Mar 31, 2015 at 1:32 PM, Satish Balay <balay at mcs.anl.gov> wrote:
>
>> 1. Check if this is reproduceable with a petsc example for your build.
>>
>> 2. if you run in the debugger - and place a breakpoint in
>> PetscInitializeFortran() - you should see the following trace.
>>
>> (gdb) where
>> #0  PetscInitializeFortran () at
>> /home/balay/petsc/src/sys/objects/ftn-custom/zstartf.c:48
>> #1  0x00007ffff66c396d in petscinitialize_ (filename=0x603640
>> <petscfortran1_> "",
>>     ierr=0x7fffffffe0bc, len=80) at
>> /home/balay/petsc/src/sys/objects/ftn-custom/zstart.c:398
>> #2  0x0000000000401a42 in MAIN__ () at ex2f.F:102
>> (gdb) n
>> 50      if (PETSC_COMM_WORLD) c1 =  MPI_Comm_c2f(PETSC_COMM_WORLD);
>> (gdb) p c1
>> $1 = 0
>> (gdb) n
>> 51      c2 =  MPI_Comm_c2f(PETSC_COMM_SELF);
>> (gdb) p c1
>> $2 = 1140850688
>>
>>
>> Satish
>>
>> On Tue, 31 Mar 2015, Mark Adams wrote:
>>
>> > I'm not sure where we are.  My code works on Edison but fails on OSX.
>> > Should I call PetscInitializeFortran?  I do not have a C main.
>> >
>> >
>> > On Tue, Mar 31, 2015 at 12:14 PM, Barry Smith <bsmith at mcs.anl.gov>
>> wrote:
>> >
>> > >
>> > > PetscErrorCode PetscInitializeFortran(void)
>> > > {
>> > >   MPI_Fint c1=0,c2=0;
>> > >
>> > >   if (PETSC_COMM_WORLD) c1 =  MPI_Comm_c2f(PETSC_COMM_WORLD);
>> > >   c2 =  MPI_Comm_c2f(PETSC_COMM_SELF);
>> > >   petscsetcommonblock_(&c1,&c2);
>> > >
>> > > Note that this routine is called automatically by the Fortran
>> > > petscinitialize function.
>> > >
>> > >   Barry
>> > >
>> > > > On Mar 31, 2015, at 10:19 AM, Matthew Knepley <knepley at gmail.com>
>> wrote:
>> > > >
>> > > > On Tue, Mar 31, 2015 at 10:13 AM, Mark Adams <mfadams at lbl.gov>
>> wrote:
>> > > > No, I don't have a C main program (like the doc says).
>> > > >
>> > > > I can see COMM_WORLD set in the Fortran initialize wrapper, but
>> where is
>> > > COMM_SELF set?
>> > > >
>> > > >    MAtt
>> > > >
>> > > > On Tue, Mar 31, 2015 at 11:05 AM, Matthew Knepley <
>> knepley at gmail.com>
>> > > wrote:
>> > > > On Tue, Mar 31, 2015 at 5:44 AM, Mark Adams <mfadams at lbl.gov>
>> wrote:
>> > > > I'm finding that my fortran code on OSX has PETSC_COMM_SELF == 0.
>> > > >
>> > > > I can not find where PETSC_COMM_SELF is created.
>> > > >
>> > > > Its set in PetscInitializeFortran(). Did you call that?
>> > > >
>> > > >   Matt
>> > > >
>> > > >
>> > > > Mark
>> > > >
>> > > >
>> > > >
>> > > > --
>> > > > 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
>> > > >
>> > > >
>> > > >
>> > > >
>> > > > --
>> > > > 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
>> > >
>> > >
>> >
>>
>>
>


-- 
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
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