==============================================================
Guild: wafer.space Community
Channel: Information / questions / Openroad GUI timing corner selection
After: 11/30/2025 23:59
Before: 01/01/2026 00:00
==============================================================

[12/02/2025 09:43] greg.hashtag.9468
I've tried googling this, but not having much luck yet. When opening the openroad-gui via librelane 'nom_tt_25C_5v00' timing corners are loaded and reported. I'm seeing a large gap between the slowest:'max_ss_125C_4v50' and fastest: 'min_ff_n40C_5v50' corners. Curious how I would load the other timing corners to visually see the paths, and maybe optimise macro placements. 

I've tried `read_spef --corner <file>`, but the corner names don't seem to be correct.


[12/02/2025 10:10] mole99
Quick and dirty: add e.g. `DEFAULT_CORNER: nom_ss_125C_4v50` to your config and LibeLane will load this corner instead.

{Reactions}
👍

[12/02/2025 10:10] mole99
However, LibreLane should really load all timing corners that are available.


==============================================================
Exported 3 message(s)
==============================================================