[petsc-users] [petsc-maint] DMSwarm on multiple processors

Mon Dec 18 04:09:36 CST 2023

Hello,

Sorry for the delay. I attach the file that I obtain when running the code with the debug mode.

Thanks for your help.

Best regards,

Joauma

De : Matthew Knepley <knepley at gmail.com>
Date : jeudi, 23 novembre 2023 à 15:32
À : Joauma Marichal <joauma.marichal at uclouvain.be>
Cc : petsc-maint at mcs.anl.gov <petsc-maint at mcs.anl.gov>, petsc-users at mcs.anl.gov <petsc-users at mcs.anl.gov>
Objet : Re: [petsc-maint] DMSwarm on multiple processors
On Thu, Nov 23, 2023 at 9:01 AM Joauma Marichal <joauma.marichal at uclouvain.be<mailto:joauma.marichal at uclouvain.be>> wrote:
Hello,

My problem persists… Is there anything I could try?

Yes. It appears to be failing from a call inside PetscSFSetUpRanks(). It does allocation, and the failure
is in libc, and it only happens on larger examples, so I suspect some allocation problem. Can you rebuild with debugging and run this example? Then we can see if the allocation fails.

  Thanks,

     Matt

Thanks a lot.

Best regards,

Joauma

De : Matthew Knepley <knepley at gmail.com<mailto:knepley at gmail.com>>
Date : mercredi, 25 octobre 2023 à 14:45
À : Joauma Marichal <joauma.marichal at uclouvain.be<mailto:joauma.marichal at uclouvain.be>>
Cc : petsc-maint at mcs.anl.gov<mailto:petsc-maint at mcs.anl.gov> <petsc-maint at mcs.anl.gov<mailto:petsc-maint at mcs.anl.gov>>, petsc-users at mcs.anl.gov<mailto:petsc-users at mcs.anl.gov> <petsc-users at mcs.anl.gov<mailto:petsc-users at mcs.anl.gov>>
Objet : Re: [petsc-maint] DMSwarm on multiple processors
On Wed, Oct 25, 2023 at 8:32 AM Joauma Marichal via petsc-maint <petsc-maint at mcs.anl.gov<mailto:petsc-maint at mcs.anl.gov>> wrote:
Hello,

I am using the DMSwarm library in some Eulerian-Lagrangian approach to have vapor bubbles in water.
I have obtained nice results recently and wanted to perform bigger simulations. Unfortunately, when I increase the number of processors used to run the simulation, I get the following error:

free(): invalid size

[cns136:590327] *** Process received signal ***

[cns136:590327] Signal: Aborted (6)

[cns136:590327] Signal code:  (-6)

[cns136:590327] [ 0] /lib64/libc.so.6(+0x4eb20)[0x7f56cd4c9b20]

[cns136:590327] [ 1] /lib64/libc.so.6(gsignal+0x10f)[0x7f56cd4c9a9f]

[cns136:590327] [ 2] /lib64/libc.so.6(abort+0x127)[0x7f56cd49ce05]

[cns136:590327] [ 3] /lib64/libc.so.6(+0x91037)[0x7f56cd50c037]

[cns136:590327] [ 4] /lib64/libc.so.6(+0x9819c)[0x7f56cd51319c]

[cns136:590327] [ 5] /lib64/libc.so.6(+0x99aac)[0x7f56cd514aac]

[cns136:590327] [ 6] /gpfs/home/acad/ucl-tfl/marichaj/marha/lib_petsc/lib/libpetsc.so.3.019(PetscSFSetUpRanks+0x4c4)[0x7f56cea71e64]

[cns136:590327] [ 7] /gpfs/home/acad/ucl-tfl/marichaj/marha/lib_petsc/lib/libpetsc.so.3.019(+0x841642)[0x7f56cea83642]

[cns136:590327] [ 8] /gpfs/home/acad/ucl-tfl/marichaj/marha/lib_petsc/lib/libpetsc.so.3.019(PetscSFSetUp+0x9e)[0x7f56cea7043e]

[cns136:590327] [ 9] /gpfs/home/acad/ucl-tfl/marichaj/marha/lib_petsc/lib/libpetsc.so.3.019(VecScatterCreate+0x164e)[0x7f56cea7bbde]

[cns136:590327] [10] /gpfs/home/acad/ucl-tfl/marichaj/marha/lib_petsc/lib/libpetsc.so.3.019(DMSetUp_DA_3D+0x3e38)[0x7f56cee84dd8]

[cns136:590327] [11] /gpfs/home/acad/ucl-tfl/marichaj/marha/lib_petsc/lib/libpetsc.so.3.019(DMSetUp_DA+0xd8)[0x7f56cee9b448]

[cns136:590327] [12] /gpfs/home/acad/ucl-tfl/marichaj/marha/lib_petsc/lib/libpetsc.so.3.019(DMSetUp+0x20)[0x7f56cededa20]

[cns136:590327] [13] ./cobpor[0x4418dc]

[cns136:590327] [14] ./cobpor[0x408b63]

[cns136:590327] [15] /lib64/libc.so.6(__libc_start_main+0xf3)[0x7f56cd4b5cf3]

[cns136:590327] [16] ./cobpor[0x40bdee]

[cns136:590327] *** End of error message ***

--------------------------------------------------------------------------

Primary job  terminated normally, but 1 process returned

a non-zero exit code. Per user-direction, the job has been aborted.

--------------------------------------------------------------------------

--------------------------------------------------------------------------

mpiexec noticed that process rank 84 with PID 590327 on node cns136 exited on signal 6 (Aborted).

--------------------------------------------------------------------------

When I reduce the number of processors the error disappears and when I run my code without the vapor bubbles it also works.
The problem seems to take place at this moment:

DMCreate(PETSC_COMM_WORLD,swarm);
    DMSetType(*swarm,DMSWARM);
    DMSetDimension(*swarm,3);
    DMSwarmSetType(*swarm,DMSWARM_PIC);
    DMSwarmSetCellDM(*swarm,*dmcell);

Thanks a lot for your help.

Things that would help us track this down:

1) The smallest example where it fails

2) The smallest number of processes where it fails

3) A stack trace of the failure

4) A simple example that we can run that also fails

  Thanks,

     Matt

Best regards,

Joauma

--
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/>

--
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/>
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