Hugging Face's logo

Datasets:
The-OpenROAD-Project
/
ORAssistant_RAG_Dataset

Dataset card Files
xet
Community
1
ORAssistant_RAG_Dataset / markdown /gh_discussions /Documentation /4495.md
palaniappan-r's picture
palaniappan-r
Add markdown sources
d59bb1b verified
preview code
|
raw
history blame contribute delete
1.43 kB

pad_left/right units for GPL and repair_clock_inverters description

Tool: Global Placement

Subcategory: Missing information

Conversation

lustefan97

I looked in OpenROAD documentation for Global Placement and Gate Resizer to get more detail about the units of the pad_left/right parameters of the global_placement command (GPL) and the use/behavior of repair_clock_inverters (RSZ).

Both the variables units description is missing (while present for DPL (site count units), but since the two tools are different I don't want to assume it is the same for both) in GPL, and there is no description concerning repair_clock_inverters use case or behavior description (like there would be for repair_timing or repair_design.

What are the units of pad_left/right, and what does repair_clock_inverters do/how to use it ?

maliberty

The units are sites from the LEF.

repair_clock_inverters is useful when you have an inverter in the clock tree that would split the tree. It clones the inverter so you have one per flop instead.

maliberty

before CTS see https://github.com/The-OpenROAD-Project/OpenROAD-flow-scripts/blob/181e9133776117ea1b9f74dbacbfdaadff8c331b/flow/scripts/cts.tcl#L7

You might benefit from investigating how ORFS works