| # Different results locally(laptop, say 32 threads) and on the server(128 threads) |
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| Tool: Global Placement |
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| Subcategory: Parallelization issues |
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| ## Conversation |
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| ### oharboe |
| Q: what happens if we have different number of cores? Should we expect different results after `make place` even if we use manual placement?
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| I suppose OpenROAD can use all available CPUs and not heed NUM_CORES in ORFS, so even if I set NUM_CORES to the same, that might not help me get the exact same results?
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| I would expect partitioning to affect the results, is this true?
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| If so, can I choose the same partitioning even if NUM_CORES differ?
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| Any thoughts on different results locally and on the server in terms of what is expected behavior? |
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| ### QuantamHD |
| It might be this issue https://github.com/The-OpenROAD-Project/OpenROAD/pull/5234 |
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| ### oharboe |
| For now my assumption is a PEBCAK: that I am running two different versions of OpenROAD in CI and locally(multiple levels of docker hell).
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| I tried locally with a single level of docker and got the same results on two machines and varying NUM_CORES. |
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| ### maliberty |
| fwiw https://github.com/The-OpenROAD-Project/OpenROAD/pull/5234 is merged |
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