[petsc-users] Expecting Explanation

[Fazlul Huq]

So I have to remove mpiexec from usr/bin
and keep it in home/petsc-3.10.2/lib/petsc/bin
Is it?

Thanks.
Sincerely,
Huq

On Sun, Nov 18, 2018 at 6:49 AM Matthew Knepley <knepley at gmail.com> wrote:

> On Sat, Nov 17, 2018 at 10:37 PM Fazlul Huq via petsc-users <
> petsc-users at mcs.anl.gov> wrote:
>
>> I tried to reconfigure PETSc and I got the following error message:
>>
>
> Do not reconfigure, just use the mpiexec in $PETSC_DIR/$PETSC_ARCH/bin as
> Barry suggested.
>
>    Matt
>
>
>>
>> ..................................................................................................................
>> Unable to find mpi in default locations!
>> Perhaps you can specify with --with-mpi-dir=<directory>
>> If you do not want MPI, then give --with-mpi=0
>> You might also consider using --download-mpich instead
>>
>> .................................................................................................................
>> I also got this error message last time when I have installed first and I
>> have used --download-mpich command.
>>
>> The log file is attached herewith along with terminal screenshot.
>> I am not sure what to do now.
>>
>> Thanks.
>> Sincerely,
>> Huq
>>
>>
>> On Sat, Nov 17, 2018 at 5:26 PM Smith, Barry F. <bsmith at mcs.anl.gov>
>> wrote:
>>
>>>
>>>    Then use
>>>
>>>      ${PETSC_DIR}/${PETSC_ARCH}/bin/mpiexec
>>>
>>>   don't just use the random (wrong) mpiexec that is in your path.
>>>
>>>    Barry
>>>
>>>
>>> > On Nov 17, 2018, at 5:22 PM, Fazlul Huq <huq2090 at gmail.com> wrote:
>>> >
>>> > I think when I have installed PETSc, I did --download-mpich.
>>> > How can I correct it? Shall I install PETSc again?
>>> >
>>> > Thanks.
>>> > Sincerely,
>>> > Huq
>>> >
>>> > On Sat, Nov 17, 2018 at 4:53 PM Smith, Barry F. <bsmith at mcs.anl.gov>
>>> wrote:
>>> >
>>> >
>>> > > On Nov 17, 2018, at 3:51 PM, Fazlul Huq via petsc-users <
>>> petsc-users at mcs.anl.gov> wrote:
>>> > >
>>> > > Thanks for the answer.
>>> > >
>>> > > So, when I run the code with "mpiexec -n 2 ./ex6" or "mpiexec -n 4
>>> ./ex6" shouldn't it spit out
>>> > > the error "This is a uniprocessor example only!"?
>>> > > But it didn't do that rather run the code 2/4 times.
>>> >
>>> >    This can happen if you use the "wrong" mpiexec; that is a different
>>> mpiexec than the one associated with the mpi you built PETSc with. For
>>> example if some mpiexec is in your path and you used ./configure
>>> --download-mpich
>>> >
>>> >    Barry
>>> >
>>> >
>>> > >
>>> > > Thanks.
>>> > > Sincerely,
>>> > > Huq
>>> > >
>>> > > On Sat, Nov 17, 2018 at 1:12 PM Fazlul Huq <huq2090 at gmail.com>
>>> wrote:
>>> > > Hello PETSc developers,
>>> > >
>>> > > In example 6 or vec section I don't understand this line:
>>> > > if (size != 1) SETERRQ(PETSC_COMM_SELF,1,"This is a uniprocessor
>>> example only!");
>>> > >
>>> > > I tried to run the code with "mpiexec -n 2 ./ex6" or "mpiexec -n 4
>>> ./ex6" or even "mpiexec -n 1 ./ex6" it the code runs properly.
>>> > >
>>> > > Thanks.
>>> > >
>>> > > Sincerely,
>>> > > Huq
>>> > >
>>> > > --
>>> > >
>>> > > Fazlul Huq
>>> > > Graduate Research Assistant
>>> > > Department of Nuclear, Plasma & Radiological Engineering (NPRE)
>>> > > University of Illinois at Urbana-Champaign (UIUC)
>>> > > E-mail: huq2090 at gmail.com
>>> > >
>>> > >
>>> > > --
>>> > >
>>> > > Fazlul Huq
>>> > > Graduate Research Assistant
>>> > > Department of Nuclear, Plasma & Radiological Engineering (NPRE)
>>> > > University of Illinois at Urbana-Champaign (UIUC)
>>> > > E-mail: huq2090 at gmail.com
>>> >
>>> >
>>> >
>>> > --
>>> >
>>> > Fazlul Huq
>>> > Graduate Research Assistant
>>> > Department of Nuclear, Plasma & Radiological Engineering (NPRE)
>>> > University of Illinois at Urbana-Champaign (UIUC)
>>> > E-mail: huq2090 at gmail.com
>>>
>>>
>>
>> --
>>
>> Fazlul Huq
>> Graduate Research Assistant
>> Department of Nuclear, Plasma & Radiological Engineering (NPRE)
>> University of Illinois at Urbana-Champaign (UIUC)
>> E-mail: huq2090 at gmail.com
>>
>
>
> --
> 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.cse.buffalo.edu/~knepley/>
>


-- 

Fazlul Huq
Graduate Research Assistant
Department of Nuclear, Plasma & Radiological Engineering (NPRE)
University of Illinois at Urbana-Champaign (UIUC)
E-mail: huq2090 at gmail.com
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