[petsc-users] GAMG crash during setup when using multiple GPUs

[Junchao Zhang]

Also, try "-use_gpu_aware_mpi 0" to see if there is a difference.

--Junchao Zhang


On Thu, Feb 10, 2022 at 1:40 PM Junchao Zhang <junchao.zhang at gmail.com>
wrote:

> Did it fail without GPU at 64 MPI ranks?
>
> --Junchao Zhang
>
>
> On Thu, Feb 10, 2022 at 1:22 PM Sajid Ali Syed <sasyed at fnal.gov> wrote:
>
>> Hi PETSc-developers,
>>
>> I’m seeing the following crash that occurs during the setup phase of the
>> preconditioner when using multiple GPUs. The relevant error trace is shown
>> below:
>>
>> (GTL DEBUG: 26) cuIpcOpenMemHandle: resource already mapped, CUDA_ERROR_ALREADY_MAPPED, line no 272
>> [24]PETSC ERROR: --------------------- Error Message --------------------------------------------------------------
>> [24]PETSC ERROR: General MPI error
>> [24]PETSC ERROR: MPI error 1 Invalid buffer pointer
>> [24]PETSC ERROR: See https://petsc.org/release/faq/ for trouble shooting.
>> [24]PETSC ERROR: Petsc Development GIT revision: f351d5494b5462f62c419e00645ac2e477b88cae  GIT Date: 2022-02-08 15:08:19 +0000
>> ...
>> [24]PETSC ERROR: #1 PetscSFLinkWaitRequests_MPI() at /tmp/sajid/spack-stage/spack-stage-petsc-main-mnj56kbexro3fipf6kheyttljzwss7fo/spack-src/src/vec/is/sf/impls/basic/sfmpi.c:54
>> [24]PETSC ERROR: #2 PetscSFLinkFinishCommunication() at /tmp/sajid/spack-stage/spack-stage-petsc-main-mnj56kbexro3fipf6kheyttljzwss7fo/spack-src/include/../src/vec/is/sf/impls/basic/sfpack.h:274
>> [24]PETSC ERROR: #3 PetscSFBcastEnd_Basic() at /tmp/sajid/spack-stage/spack-stage-petsc-main-mnj56kbexro3fipf6kheyttljzwss7fo/spack-src/src/vec/is/sf/impls/basic/sfbasic.c:218
>> [24]PETSC ERROR: #4 PetscSFBcastEnd() at /tmp/sajid/spack-stage/spack-stage-petsc-main-mnj56kbexro3fipf6kheyttljzwss7fo/spack-src/src/vec/is/sf/interface/sf.c:1499
>> [24]PETSC ERROR: #5 VecScatterEnd_Internal() at /tmp/sajid/spack-stage/spack-stage-petsc-main-mnj56kbexro3fipf6kheyttljzwss7fo/spack-src/src/vec/is/sf/interface/vscat.c:87
>> [24]PETSC ERROR: #6 VecScatterEnd() at /tmp/sajid/spack-stage/spack-stage-petsc-main-mnj56kbexro3fipf6kheyttljzwss7fo/spack-src/src/vec/is/sf/interface/vscat.c:1366
>> [24]PETSC ERROR: #7 MatMult_MPIAIJCUSPARSE() at /tmp/sajid/spack-stage/spack-stage-petsc-main-mnj56kbexro3fipf6kheyttljzwss7fo/spack-src/src/mat/impls/aij/mpi/mpicusparse/mpiaijcusparse.cu:302
>> [24]PETSC ERROR: #8 MatMult() at /tmp/sajid/spack-stage/spack-stage-petsc-main-mnj56kbexro3fipf6kheyttljzwss7fo/spack-src/src/mat/interface/matrix.c:2438
>> [24]PETSC ERROR: #9 PCApplyBAorAB() at /tmp/sajid/spack-stage/spack-stage-petsc-main-mnj56kbexro3fipf6kheyttljzwss7fo/spack-src/src/ksp/pc/interface/precon.c:730
>> [24]PETSC ERROR: #10 KSP_PCApplyBAorAB() at /tmp/sajid/spack-stage/spack-stage-petsc-main-mnj56kbexro3fipf6kheyttljzwss7fo/spack-src/include/petsc/private/kspimpl.h:421
>> [24]PETSC ERROR: #11 KSPGMRESCycle() at /tmp/sajid/spack-stage/spack-stage-petsc-main-mnj56kbexro3fipf6kheyttljzwss7fo/spack-src/src/ksp/ksp/impls/gmres/gmres.c:162
>> [24]PETSC ERROR: #12 KSPSolve_GMRES() at /tmp/sajid/spack-stage/spack-stage-petsc-main-mnj56kbexro3fipf6kheyttljzwss7fo/spack-src/src/ksp/ksp/impls/gmres/gmres.c:247
>> [24]PETSC ERROR: #13 KSPSolve_Private() at /tmp/sajid/spack-stage/spack-stage-petsc-main-mnj56kbexro3fipf6kheyttljzwss7fo/spack-src/src/ksp/ksp/interface/itfunc.c:925
>> [24]PETSC ERROR: #14 KSPSolve() at /tmp/sajid/spack-stage/spack-stage-petsc-main-mnj56kbexro3fipf6kheyttljzwss7fo/spack-src/src/ksp/ksp/interface/itfunc.c:1103
>> [24]PETSC ERROR: #15 PCGAMGOptProlongator_AGG() at /tmp/sajid/spack-stage/spack-stage-petsc-main-mnj56kbexro3fipf6kheyttljzwss7fo/spack-src/src/ksp/pc/impls/gamg/agg.c:1127
>> [24]PETSC ERROR: #16 PCSetUp_GAMG() at /tmp/sajid/spack-stage/spack-stage-petsc-main-mnj56kbexro3fipf6kheyttljzwss7fo/spack-src/src/ksp/pc/impls/gamg/gamg.c:626
>> [24]PETSC ERROR: #17 PCSetUp() at /tmp/sajid/spack-stage/spack-stage-petsc-main-mnj56kbexro3fipf6kheyttljzwss7fo/spack-src/src/ksp/pc/interface/precon.c:1017
>> [24]PETSC ERROR: #18 KSPSetUp() at /tmp/sajid/spack-stage/spack-stage-petsc-main-mnj56kbexro3fipf6kheyttljzwss7fo/spack-src/src/ksp/ksp/interface/itfunc.c:417
>> [24]PETSC ERROR: #19 main() at poisson3d.c:69
>> [24]PETSC ERROR: PETSc Option Table entries:
>> [24]PETSC ERROR: -dm_mat_type aijcusparse
>> [24]PETSC ERROR: -dm_vec_type cuda
>> [24]PETSC ERROR: -ksp_monitor
>> [24]PETSC ERROR: -ksp_norm_type unpreconditioned
>> [24]PETSC ERROR: -ksp_type cg
>> [24]PETSC ERROR: -ksp_view
>> [24]PETSC ERROR: -log_view
>> [24]PETSC ERROR: -mg_levels_esteig_ksp_type cg
>> [24]PETSC ERROR: -mg_levels_ksp_type chebyshev
>> [24]PETSC ERROR: -mg_levels_pc_type jacobi
>> [24]PETSC ERROR: -pc_gamg_agg_nsmooths 1
>> [24]PETSC ERROR: -pc_gamg_square_graph 1
>> [24]PETSC ERROR: -pc_gamg_threshold 0.0
>> [24]PETSC ERROR: -pc_gamg_threshold_scale 0.0
>> [24]PETSC ERROR: -pc_gamg_type agg
>> [24]PETSC ERROR: -pc_type gamg
>> [24]PETSC ERROR: ----------------End of Error Message -------send entire error message to petsc-maint at mcs.anl.gov----------
>>
>> Attached with this email is the full error log and the submit script for
>> a 8-node/64-GPU/64 MPI rank job. I’ll also note that the same program did
>> not crash when using either 2 or 4 nodes (with 8 & 16 GPUs/MPI ranks
>> respectively) and attach those logs as well if that helps. Could someone
>> let me know what this error means and what can be done to prevent it?
>>
>> Thank You,
>> Sajid Ali (he/him) | Research Associate
>>
>> Scientific Computing Division
>>
>> Fermi National Accelerator Laboratory
>>
>> s-sajid-ali.github.io
>> ​
>>
>
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