| # Different results locally(laptop, say 32 threads) and on the server(128 threads) | |
| Tool: Global Placement | |
| Subcategory: Parallelization issues | |
| ## Conversation | |
| ### 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? | |
| 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? | |
| I would expect partitioning to affect the results, is this true? | |
| If so, can I choose the same partitioning even if NUM_CORES differ? | |
| Any thoughts on different results locally and on the server in terms of what is expected behavior? | |
| ### QuantamHD | |
| It might be this issue https://github.com/The-OpenROAD-Project/OpenROAD/pull/5234 | |
| ### 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). | |
| I tried locally with a single level of docker and got the same results on two machines and varying NUM_CORES. | |
| ### maliberty | |
| fwiw https://github.com/The-OpenROAD-Project/OpenROAD/pull/5234 is merged | |