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CoreNrn: support for rebalanced files.dat #3147

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merged 2 commits into from
Dec 5, 2024
Merged

CoreNrn: support for rebalanced files.dat #3147

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005577e
Intoduce a sentinel value to allow loading rebalanced files
ferdonline Oct 29, 2024
5a9d014
Improved message
ferdonline Nov 19, 2024
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6 changes: 6 additions & 0 deletions src/coreneuron/io/nrn_setup.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -216,6 +216,12 @@

nrn_assert(fscanf(fp, "%d\n", &iFile) == 1);
if ((iNum % nrnmpi_numprocs) == nrnmpi_myid) {
// A "-1" entry means that this rank should not be assigned further gid groups.
// It is a way to create files.dat files which deterministically assign gid groups to
// ranks, particularly useful for very large simulations which required load balancing.
if (iFile == -1) {
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break;

Check warning on line 223 in src/coreneuron/io/nrn_setup.cpp

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}
grp[ngrp] = iFile;
ngrp++;
}
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