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      Hi,<br>
      <br>
      yes, I can compile and run it:<br>
      <br>
      <pre>~$ mpicc -o pi-mpi pi-mpi.c -lm
~$ mpirun -np 16 --hostfile ~/hosts ./pi-mpi
Number of intervals: 2048
Result:   3.1411043724
Accuracy: 0.0004882812
Time:     0.0314383930
~$

</pre>
      Best regards,<br>
      <br>
      Rafel Amer<br>
      <br>
      <br>
      <br>
      <br>
      El 23/8/22 a les 14:46, Matthew Knepley ha escrit:<br>
    </div>
    <blockquote type="cite"
cite="mid:CAMYG4GkBXMO3t7sMgOXS-Qwns6Uy1Eg3hYg6rref+Hre-u0hxA@mail.gmail.com">
      <meta http-equiv="content-type" content="text/html; charset=UTF-8">
      <div dir="ltr">Can you run anything in parallel? Say the small
        sample code that calculates pi?
        <div><br>
        </div>
        <div>  <a
href="https://www.cs.usfca.edu/~mmalensek/cs220/schedule/code/week09/pi-mpi.c.html"
            moz-do-not-send="true" class="moz-txt-link-freetext">https://www.cs.usfca.edu/~mmalensek/cs220/schedule/code/week09/pi-mpi.c.html</a></div>
        <div><br>
        </div>
        <div>  Thanks,</div>
        <div><br>
        </div>
        <div>      Matt</div>
      </div>
      <br>
      <div class="gmail_quote">
        <div dir="ltr" class="gmail_attr">On Tue, Aug 23, 2022 at 6:34
          AM Rafel Amer Ramon <<a href="mailto:rafel.amer@upc.edu"
            moz-do-not-send="true" class="moz-txt-link-freetext">rafel.amer@upc.edu</a>>
          wrote:<br>
        </div>
        <blockquote class="gmail_quote" style="margin:0px 0px 0px
          0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
          <div>
            <div><br>
              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">
              <div><br>
              </div>
                Are you sure the mpirun you are using matches the mpi
              that PETSc was built with? <br>
              <div><br>
                <blockquote type="cite">
                  <div>On Aug 22, 2022, at 2:31 PM, Rafel Amer Ramon
                    <<a href="mailto:rafel.amer@upc.edu"
                      target="_blank" moz-do-not-send="true"
                      class="moz-txt-link-freetext">rafel.amer@upc.edu</a>>
                    wrote:</div>
                  <br>
                  <div>
                    <div> Hi,<br>
                      <br>
                      I have installed the following packages on fedora
                      36<br>
                      <br>
                      <pre><font 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 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>
                      <br>
                      <pre><font 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>
                      <br>
                      <pre><font color="#0000ff">~# mpicc -o e e.c -I/usr/include/petsc64 -lpetsc64</font>

</pre>
                      and I run it with <br>
                      <br>
                      <pre><font color="#0000ff">~# mpirun -np 8 ./e</font>
<font 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>
                      <br>
                      Do you know what I'm doing wrong?<br>
                      <br>
                      Thank you!!<br>
                      <br>
                      Best regards,<br>
                      <br>
                      Rafel Amer </div>
                  </div>
                </blockquote>
              </div>
              <br>
            </blockquote>
            <br>
          </div>
        </blockquote>
      </div>
      <br clear="all">
      <div><br>
      </div>
      -- <br>
      <div dir="ltr" class="gmail_signature">
        <div dir="ltr">
          <div>
            <div dir="ltr">
              <div>
                <div dir="ltr">
                  <div>What most experimenters take for granted before
                    they begin their experiments is infinitely more
                    interesting than any results to which their
                    experiments lead.<br>
                    -- Norbert Wiener</div>
                  <div><br>
                  </div>
                  <div><a href="http://www.cse.buffalo.edu/~knepley/"
                      target="_blank" moz-do-not-send="true">https://www.cse.buffalo.edu/~knepley/</a><br>
                  </div>
                </div>
              </div>
            </div>
          </div>
        </div>
      </div>
    </blockquote>
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