[petsc-users] [EXTERNAL] Re: insufficient virtual memory?

[Park, Heeho]

Thank you Barry. I will look further into it.

- Heeho Daniel Park

From: Barry Smith <bsmith at petsc.dev>
Date: Wednesday, February 17, 2021 at 6:57 PM
To: "Park, Heeho" <heepark at sandia.gov>
Cc: "petsc-users at mcs.anl.gov" <petsc-users at mcs.anl.gov>
Subject: [EXTERNAL] Re: [petsc-users] insufficient virtual memory?


   PETSc gets almost all its memory using the C malloc system calls so it is unlikely that this Fortran error message comes from PETSc code. My guess is that you have some Fortran arrays declared somewhere in your code that are large and require memory that is not available.

  Barry



On Feb 17, 2021, at 7:23 PM, Park, Heeho via petsc-users <petsc-users at mcs.anl.gov<mailto:petsc-users at mcs.anl.gov>> wrote:

Hi PETSc developers,

Have you seen this error message?

      forrtl: severe (41): insufficient virtual memory

We are running about 36 million degrees of freedom ( ~ 2.56 GB) and it is failing with the error message on our HPC systems.
Ironically, it runs on our laptop (super slow.)

      type: seqbaij
      rows=46251272, cols=46251272
      total: nonzeros=323046210, allocated nonzeros=323046210
      total number of mallocs used during MatSetValues calls=0
          block size is 1

Does anyone have experience encountering this problem?

Thanks,

Heeho Daniel Park

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Sandia National Laboratories
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