DREAMPlace icon indicating copy to clipboard operation
DREAMPlace copied to clipboard

Published 20 hours ago • verified publisher icon limbo018

Compared to dc/invc/openroad upon my cases, dreaplace has the shock congestion Morphologically

Open tigereatsheep opened this issue 10 months ago • 4 comments

dcg: 0.+% H + 0.+% V innovus: 1.+% H + 1.+% V OR: 22.+% H + 33.+% V dreamplace: 58+% H + 38.+% V

and dreaplace' routing length is 4x dcg's result.

I think here maybe hpwl is not a good cost function?

tigereatsheep avatar Apr 18 '24 05:04 tigereatsheep

Hi, by default, dreamplace does not turn on routability optimization. It looks like your case needs heavy optimization on routability.

limbo018 avatar Apr 18 '24 06:04 limbo018

Hi, by default, dreamplace does not turn on routability optimization. It looks like your case needs heavy optimization on routability.

You are right, I'm focusing on solving congestion problem in EPlace framework. Do you know better WL estimation method (better than LSE/WA)？ By the way, DreamPlace is really fast.

tigereatsheep avatar Apr 18 '24 06:04 tigereatsheep

You may check section III.F in the TCAD version of DREAMPlace paper (https://yibolin.com/publications/papers/PLACE_TCAD2020_Lin.pdf). It explains a typical way to do routability optimization. The default flow of DREAMPlace does not turn on routability optimization though.

limbo018 avatar Apr 18 '24 11:04 limbo018

You may check section III.F in the TCAD version of DREAMPlace paper (https://yibolin.com/publications/papers/PLACE_TCAD2020_Lin.pdf). It explains a typical way to do routability optimization. The default flow of DREAMPlace does not turn on routability optimization though.

Thank you for your help. I would working on this problem for several weeks

tigereatsheep avatar Apr 19 '24 03:04 tigereatsheep