| # About Local Density Penalty Described in the Original RePlace Paper |
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| Tool: Global Placement |
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| Subcategory: Code implementation query |
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| ## Conversation |
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| ### by1e11 |
| Hi, guys
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| After reading the paper and browsing the source codes, I cannot figure out which parts of the codes reflect the local density penalty described in the paper, could you please suggest where can I find that in the implementation?
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| Thanks a lot for the nice work.
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| Bo |
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| ### maliberty |
| @mgwoo can you answer this? |
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| ### mangohehe |
| A method related density computation seems to be removed in the CL https://github.com/The-OpenROAD-Project/OpenROAD/commit/0f82f83049733938c2fb5d6141b291409aa4678f , in which the original design calls updateDensityForceBin inside NesterovPlace::doNesterovPlace. (not sure if this can be related)
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| @ahmadelrouby could you help understand the changes? thanks |
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| ### mgwoo |
| I didn't decipher the local density features because of unstable issues.
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| Please check the standalone repo for the local density calculation: https://github.com/The-OpenROAD-Project/RePlAce/blob/7c07cffdf419c4dbd315c73c235ec5d670fb0240/src/ns.cpp#L1011 |
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