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<p class="MsoNormal">Thank you Barry. I will look further into it.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="color:black">- Heeho Daniel Park</span><o:p></o:p></p>
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<p class="MsoNormal"><b><span style="font-size:12.0pt;color:black">From: </span></b><span style="font-size:12.0pt;color:black">Barry Smith <bsmith@petsc.dev><br>
<b>Date: </b>Wednesday, February 17, 2021 at 6:57 PM<br>
<b>To: </b>"Park, Heeho" <heepark@sandia.gov><br>
<b>Cc: </b>"petsc-users@mcs.anl.gov" <petsc-users@mcs.anl.gov><br>
<b>Subject: </b>[EXTERNAL] Re: [petsc-users] insufficient virtual memory?<o:p></o:p></span></p>
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<p class="MsoNormal"> 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. <o:p></o:p></p>
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<p class="MsoNormal"> Barry<o:p></o:p></p>
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<p class="MsoNormal">On Feb 17, 2021, at 7:23 PM, Park, Heeho via petsc-users <<a href="mailto:petsc-users@mcs.anl.gov">petsc-users@mcs.anl.gov</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal">Hi PETSc developers,<span style="font-size:12.0pt"><o:p></o:p></span></p>
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<p class="MsoNormal"> <span style="font-size:12.0pt"><o:p></o:p></span></p>
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<p class="MsoNormal">Have you seen this error message?<span style="font-size:12.0pt"><o:p></o:p></span></p>
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<p class="MsoNormal"> <span style="font-size:12.0pt"><o:p></o:p></span></p>
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<p class="MsoNormal"> forrtl: severe (41): insufficient virtual memory<span style="font-size:12.0pt"><o:p></o:p></span></p>
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<p class="MsoNormal"> <span style="font-size:12.0pt"><o:p></o:p></span></p>
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<p class="MsoNormal">We are running about 36 million degrees of freedom ( ~ 2.56 GB) and it is failing with the error message on our HPC systems.<span style="font-size:12.0pt"><o:p></o:p></span></p>
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<p class="MsoNormal">Ironically, it runs on our laptop (super slow.)<span style="font-size:12.0pt"><o:p></o:p></span></p>
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<p class="MsoNormal"> <span style="font-size:12.0pt"><o:p></o:p></span></p>
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<p class="MsoNormal"> type: seqbaij<span style="font-size:12.0pt"><o:p></o:p></span></p>
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<p class="MsoNormal"> rows=46251272, cols=46251272<span style="font-size:12.0pt"><o:p></o:p></span></p>
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<p class="MsoNormal"> total: nonzeros=323046210, allocated nonzeros=323046210<span style="font-size:12.0pt"><o:p></o:p></span></p>
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<p class="MsoNormal"> total number of mallocs used during MatSetValues calls=0<span style="font-size:12.0pt"><o:p></o:p></span></p>
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<p class="MsoNormal"> block size is 1<span style="font-size:12.0pt"><o:p></o:p></span></p>
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<p class="MsoNormal"> <span style="font-size:12.0pt"><o:p></o:p></span></p>
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<p class="MsoNormal">Does anyone have experience encountering this problem?<span style="font-size:12.0pt"><o:p></o:p></span></p>
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<p class="MsoNormal"> <span style="font-size:12.0pt"><o:p></o:p></span></p>
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<p class="MsoNormal">Thanks,<span style="font-size:12.0pt"><o:p></o:p></span></p>
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<p class="MsoNormal"> <span style="font-size:12.0pt"><o:p></o:p></span></p>
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<p class="MsoNormal">Heeho Daniel Park<br>
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! ------------------------------------ !<br>
Sandia National Laboratories<span style="font-size:12.0pt"><o:p></o:p></span></p>
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<p class="MsoNormal">Org: 08844, R&D<span style="font-size:12.0pt"><o:p></o:p></span></p>
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<p class="MsoNormal">Work: 505-844-1319<br>
! ------------------------------------ !<span style="font-size:12.0pt"><o:p></o:p></span></p>
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