<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body style="overflow-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;"><div><br></div> Should a default build of PETSc configure both with and without debugging and compile both sets of libraries? Increases the initial build time for people but simplifies life.<div><br></div><div><br><div><br></div><div><br><div><br><blockquote type="cite"><div>On Aug 11, 2023, at 10:52 AM, Junchao Zhang <junchao.zhang@gmail.com> wrote:</div><br class="Apple-interchange-newline"><div><div dir="ltr"><div>Hi, Marcos,</div><div> Could you build petsc in debug mode and then copy and paste the whole error stack message?</div><div><br></div> Thanks<br clear="all"><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr">--Junchao Zhang</div></div></div><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, Aug 10, 2023 at 5:51 PM Vanella, Marcos (Fed) via petsc-users <<a href="mailto:petsc-users@mcs.anl.gov">petsc-users@mcs.anl.gov</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 class="msg-8989966265154195036">
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Hi, I'm trying to run a parallel matrix vector build and linear solution with PETSc on 2 MPI processes + one V100 GPU. I tested that the matrix build and solution is successful in CPUs only. I'm using cuda 11.5 and cuda enabled openmpi and gcc 9.3. When I run
the job with GPU enabled I get the following error:</div>
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<span style="font-family:"Courier New",monospace">terminate called after throwing an instance of 'thrust::system::system_error'</span>
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what(): merge_sort: failed to synchronize: cudaErrorIllegalAddress: an illegal memory access was encountered</b></span></div>
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<div><span style="font-family:"Courier New",monospace">Program received signal SIGABRT: Process abort signal.</span></div>
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<div><span style="font-family:"Courier New",monospace">Backtrace for this error:</span></div>
<div><span style="font-family:"Courier New",monospace">terminate called after throwing an instance of 'thrust::system::system_error'</span></div>
<div><span style="font-family:"Courier New",monospace"> what(): merge_sort: failed to synchronize: cudaErrorIllegalAddress: an illegal memory access was encountered</span></div>
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<span style="font-family:"Courier New",monospace">Program received signal SIGABRT: Process abort signal.</span></div>
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<span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt;">I'm new to submitting jobs in slurm that also use GPU resources, so I might be doing something wrong in my submission script. This is it:</span></div>
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<span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt;">#!/bin/bash
<div>#SBATCH -J test</div>
<div>#SBATCH -e /home/Issues/PETSc/test.err</div>
<div>#SBATCH -o /home/Issues/PETSc/test.log</div>
<div>#SBATCH --partition=batch</div>
<div>#SBATCH --ntasks=2</div>
<div>#SBATCH --nodes=1</div>
<div>#SBATCH --cpus-per-task=1</div>
<div>#SBATCH --ntasks-per-node=2</div>
<div>#SBATCH --time=01:00:00</div>
<div>#SBATCH --gres=gpu:1</div>
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<div>export OMP_NUM_THREADS=1</div>
<div>module load cuda/11.5</div>
<div>module load openmpi/4.1.1</div>
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<div>cd /home/Issues/PETSc</div>
<div><b>mpirun -n 2 </b>/home/fds/Build/ompi_gnu_linux/fds_ompi_gnu_linux test.fds
<b>-vec_type mpicuda -mat_type mpiaijcusparse -pc_type gamg</b></div>
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<span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt;">If anyone has any suggestions on how o troubleshoot this please let me know.</span></div>
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<span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt;">Thanks!</span></div>
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<span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt;">Marcos<br>
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