The-OpenROAD-Project / The-OpenROAD-Project/OpenROAD
gpl: automatically inflate newly inserted buffers from rsz
@gudeh is already working on this.
Since Sep 22, 2025.
- Dominant language
- Verilog
- Stars
- 3.1k
- Forks
- 1k
- Avg merge
- 2d 23h
- Merged PRs (30d)
- 136
Description
Description
Sharing an idea. We currently execute a timing-driven iteration after routability mode finishes. The newly inserted buffers by resizer might be added to congested areas (and even remove inflated instances).
It would be an interesting experiment to automatically inflate the inserted buffers by resizer based on the congestion region they are inserted at.
Another idea along this lines would be to call RUDY right after the TD iteration and reapply inflations entirely, not only to newly inserted instances.
I imagine no reverts like in routability mode.
Suggested Solution
An initial attempt would be to call RUDY right after the TD iteration with new instances, and modify the new instances areas based on RUDY tiles, all the same as done in routability mode in routeBase.cpp.
Additional Context
No response
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Assessment
This issue has not been assessed yet.