New custom configs for uW and metrics update for MPL changes#3007
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maliberty merged 2 commits intoThe-OpenROAD-Project:masterfrom Mar 31, 2025
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1. Use a custom blockage halo to make channels between macros
inaccessible for GPL in order to avoid congestion problems.
2. Use a higher placement density for GPL to run with the new
blockages.
Signed-off-by: Arthur Koucher <arthurkoucher@precisioninno.com>
sky130hd/uW | Metric | Old | New | Type | | ------ | --- | --- | ---- | | globalroute__antenna_diodes_count | 1185 | 2756 | Failing | | detailedroute__antenna__violating__nets | 2 | 0 | Tighten | | finish__timing__drv__hold_violation_count | 122 | 101 | Tighten | gf12/bp_single | Metric | Old | New | Type | | ------ | --- | --- | ---- | | finish__timing__drv__hold_violation_count | 100 | 230 | Failing | Signed-off-by: Arthur Koucher <arthurkoucher@precisioninno.com>
This was referenced Mar 28, 2025
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@gudeh FYI |
maliberty
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Mar 28, 2025
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@maliberty |
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Metrics:
sky130hd/uW
gf12/bp_single
Custom Configs for uW
Increase blockage halos to eliminate available space for GPL. The idea is to avoid gates to be placed in such away that their connections cross over macros. We do this to make it easier to route as the macros are blocked up until metal4 leaving only metal5 available for wires (the macros also have pins in all four sides which makes it worse).
Increase the placement density in order to make GPL able to run. The available space gets smaller due to the new blockages, so the placer requires a higher density.