( ESNUG 371 Item 2 ) -------------------------------------------- [05/23/01]

From: [ Shrek's Donkey ]
Subject: PhysOpt Clustering Creates Congestion Making Unroutable Designs

Hi John, please keep me anonymous.

Though our design's overall row utilization is low, about 55%, PhysOpt
(since it doesn't have real global routing) keeps clustering cells to
create very high density areas.  This happens with -congestion option,
even when we leave empty space around the cluster.  This congestion makes
our design unroutable.

    - [ Shrek's Donkey ]
 Sign up for the DeepChip newsletter.
Email
 Read what EDA tool users really think.


Feedback About Wiretaps ESNUGs SIGN UP! Downloads Trip Reports Advertise
"Relax. This is a discussion. Anything said here is just one engineer's opinion. Email in your dissenting letter and it'll be published, too."
This Web Site Is Modified Every 2-3 Days
Copyright 1991-2024 John Cooley.  All Rights Reserved.
| Contact John Cooley | Webmaster | Legal | Feedback Form | 

   !!!     "It's not a BUG,
  /o o\  /  it's a FEATURE!"
 (  >  )
  \ - / 
  _] [_     (jcooley 1991)