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March 3, 2021, 07:44 |
Very slow start up
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#1 |
New Member
NA
Join Date: Oct 2015
Posts: 10
Rep Power: 11 |
Hello,
When running on large numbers of cores, we have noticed that the start up of the solver takes very long. We haven't seen it before, and the simulations started almost straight away, but now it takes long time waiting: Code:
Pstream initialized with: floatTransfer : 0 nProcsSimpleSum : 0 commsType : nonBlocking polling iterations : 0 fileModificationChecking : Monitoring run-time modified files using timeStampMaster (fileModificationSkew 10) allowSystemOperations : Allowing user-supplied system call operations // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // Is there a reason for this? Can anything be done about this? Cheers Last edited by luiceur; March 3, 2021 at 07:46. Reason: formatting |
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March 3, 2021, 15:08 |
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#2 |
Senior Member
Mark Olesen
Join Date: Mar 2009
Location: https://olesenm.github.io/
Posts: 1,714
Rep Power: 40 |
Filesystem related?
You don't say how many cores nor which version you are using. |
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March 3, 2021, 17:15 |
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#3 |
New Member
NA
Join Date: Oct 2015
Posts: 10
Rep Power: 11 |
It could be filesystem related... yes but I cannot say for sure. Certainly I have not seen this behaviour before.
We are talking about 8000+ cores with OF v1912 |
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Tags |
parallel cluster, simplefoam, slow read, slow simulation |
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