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      Hi,<br>
      <br>
      mpicc and mpirun are from the package
      openmpi-devel-4.1.2-3.fc36.x86_64<br>
      and the petsc64 library is linked with <font color="#ffffff">
        /usr/lib64/openmpi/lib/libmpi.so.40</font>
      <pre>~# ldd /lib64/libpetsc64.so.3.16.4 
        linux-vdso.so.1 (0x00007fff5becc000)
        libflexiblas64.so.3 => /lib64/libflexiblas64.so.3 (0x00007f3030e30000)
        libcgns.so.4.2 => /usr/lib64/openmpi/lib/libcgns.so.4.2 (0x00007f3030d46000)
        libhdf5.so.200 => /usr/lib64/openmpi/lib/libhdf5.so.200 (0x00007f303091a000)
        libm.so.6 => /lib64/libm.so.6 (0x00007f303083c000)
        libX11.so.6 => /lib64/libX11.so.6 (0x00007f30306f4000)
        libstdc++.so.6 => /lib64/libstdc++.so.6 (0x00007f30304c0000)
        libgcc_s.so.1 => /lib64/libgcc_s.so.1 (0x00007f303049e000)
        libc.so.6 => /lib64/libc.so.6 (0x00007f303029c000)
        libgfortran.so.5 => /lib64/libgfortran.so.5 (0x00007f302ffcf000)
        libquadmath.so.0 => /lib64/libquadmath.so.0 (0x00007f302ff87000)
        /lib64/ld-linux-x86-64.so.2 (0x00007f30327bb000)
        <font color="#0000ff">libmpi.so.40 => /usr/lib64/openmpi/lib/libmpi.so.40 (0x00007f302fe59000)</font>
        libsz.so.2 => /lib64/libsz.so.2 (0x00007f302fe50000)
        libz.so.1 => /lib64/libz.so.1 (0x00007f302fe34000)
        libxcb.so.1 => /lib64/libxcb.so.1 (0x00007f302fe08000)
        libopen-rte.so.40 => /usr/lib64/openmpi/lib/libopen-rte.so.40 (0x00007f302fd4d000)
        libopen-pal.so.40 => /usr/lib64/openmpi/lib/libopen-pal.so.40 (0x00007f302fc9f000)
        libhwloc.so.15 => /lib64/libhwloc.so.15 (0x00007f302fc42000)
        libevent_core-2.1.so.7 => /lib64/libevent_core-2.1.so.7 (0x00007f302fc07000)
        libevent_pthreads-2.1.so.7 => /lib64/libevent_pthreads-2.1.so.7 (0x00007f302fc02000)
        libXau.so.6 => /lib64/libXau.so.6 (0x00007f302fbfc000)

</pre>
      I think that it's correct, but it don't work.<br>
      <br>
      Best regards,<br>
      <br>
      Rafel Amer<br>
      <br>
      El 22/8/22 a les 20:36, Barry Smith ha escrit:<br>
    </div>
    <blockquote type="cite"
      cite="mid:358BFF34-D941-42AB-8648-871186EF64DB@petsc.dev">
      <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
      <div class=""><br class="">
      </div>
        Are you sure the mpirun you are using matches the mpi that PETSc
      was built with? <br class="">
      <div><br class="">
        <blockquote type="cite" class="">
          <div class="">On Aug 22, 2022, at 2:31 PM, Rafel Amer Ramon
            <<a href="mailto:rafel.amer@upc.edu"
              class="moz-txt-link-freetext" moz-do-not-send="true">rafel.amer@upc.edu</a>>
            wrote:</div>
          <br class="Apple-interchange-newline">
          <div class="">
            <meta http-equiv="content-type" content="text/html;
              charset=UTF-8" class="">
            <div class=""> Hi,<br class="">
              <br class="">
              I have installed the following packages on fedora 36<br
                class="">
              <br class="">
              <pre class=""><font class="" color="#0000ff">~# rpm -qa | grep petsc
petsc64-3.16.4-3.fc36.x86_64
petsc-3.16.4-3.fc36.x86_64
petsc-openmpi-3.16.4-3.fc36.x86_64
petsc-openmpi-devel-3.16.4-3.fc36.x86_64
python3-petsc-openmpi-3.16.4-3.fc36.x86_64
petsc-devel-3.16.4-3.fc36.x86_64
petsc64-devel-3.16.4-3.fc36.x86_64</font>

<font class="" color="#0000ff">~# rpm -qa | grep openmpi
openmpi-4.1.2-3.fc36.x86_64
ptscotch-openmpi-6.1.2-2.fc36.x86_64
scalapack-openmpi-2.1.0-11.fc36.x86_64
openmpi-devel-4.1.2-3.fc36.x86_64
MUMPS-openmpi-5.4.1-2.fc36.x86_64
superlu_dist-openmpi-6.1.1-9.fc36.x86_64
hdf5-openmpi-1.12.1-5.fc36.x86_64
hypre-openmpi-2.18.2-6.fc36.x86_64
petsc-openmpi-3.16.4-3.fc36.x86_64
fftw-openmpi-libs-double-3.3.10-2.fc36.x86_64
fftw-openmpi-libs-long-3.3.10-2.fc36.x86_64
fftw-openmpi-libs-single-3.3.10-2.fc36.x86_64
fftw-openmpi-libs-3.3.10-2.fc36.x86_64
fftw-openmpi-devel-3.3.10-2.fc36.x86_64
petsc-openmpi-devel-3.16.4-3.fc36.x86_64
python3-petsc-openmpi-3.16.4-3.fc36.x86_64
scalapack-openmpi-devel-2.1.0-11.fc36.x86_64
python3-openmpi-4.1.2-3.fc36.x86_64
hdf5-openmpi-devel-1.12.1-5.fc36.x86_64
cgnslib-openmpi-4.2.0-6.fc36.x86_64
cgnslib-openmpi-devel-4.2.0-6.fc36.x86_64</font>

</pre>
              and I try to compile and run the program written in the
              file e.c<br class="">
              <br class="">
              <pre class=""><font class="" color="#0000ff">~# cat e.c
#include <petsc.h>

int main(int argc, char **argv) {
  PetscErrorCode ierr;
  PetscMPIInt    rank;

  ierr = PetscInitialize(&argc,&argv,NULL,
      "Compute e in parallel with PETSc.\n\n"); if (ierr) return ierr;
  ierr = MPI_Comm_rank(PETSC_COMM_WORLD,&rank); CHKERRQ(ierr);
  ierr = PetscPrintf(PETSC_COMM_WORLD,"My rank is %d\n",rank); CHKERRQ(ierr);

  
  return PetscFinalize();
}
</font>
</pre>
              I compile it with the command<br class="">
              <br class="">
              <pre class=""><font class="" color="#0000ff">~# mpicc -o e e.c -I/usr/include/petsc64 -lpetsc64</font>

</pre>
              and I run it with <br class="">
              <br class="">
              <pre class=""><font class="" color="#0000ff">~# mpirun -np 8 ./e</font>
<font class="" color="#0000ff">My rank is 0
My rank is 0
My rank is 0
My rank is 0
My rank is 0
My rank is 0
My rank is 0
My rank is 0</font>

</pre>
              but all my process get rank 0.<br class="">
              <br class="">
              Do you know what I'm doing wrong?<br class="">
              <br class="">
              Thank you!!<br class="">
              <br class="">
              Best regards,<br class="">
              <br class="">
              Rafel Amer </div>
          </div>
        </blockquote>
      </div>
      <br class="">
    </blockquote>
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