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Matteo Mannis (Felucco)

05/05/2023, 3:54 PM
Hi, is there a way to obtain the HPWL estimation at any given PD step? By that I mean: when I run GPL, it prints the HPWL value (I'd say estimated given no routing has been done yet) for every iteration. Is there a way to obtain a report of such value after the elaboration is finished? Thanks in advance
m

Matt Liberty

05/06/2023, 1:04 AM
HPWL is a simple estimate of wire length made when there is no routing. It doesn't make much sense to look at it once you have real routing (global or detailed). What is your use model?
m

Matteo Mannis (Felucco)

05/08/2023, 9:20 AM
Hi Matt, thanks for the response. I have a custom setup on which I have to run many evaluation runs. The main problem is that each step takes a lot of time given the complexity of the RTL so I was looking for the first point with a strong enough correlation to the post-detailed-placement metrics on which to stop the runs. One of the metrics I'm trying to study is indeed the HPWL estimate, hence the need to "print" it in different steps. I hope this makes sense to you