home *** CD-ROM | disk | FTP | other *** search
- Newsgroups: comp.lsi.cad
- Path: sparky!uunet!usc!elroy.jpl.nasa.gov!decwrl!deccrl!news.crl.dec.com!pa.dec.com!alf.dec.com!netnews.alf.dec.com!libove
- From: libove@server.alf.dec.com (Jay Vassos-Libove)
- Subject: "Magic" router software assistance?
- Message-ID: <LIBOVE.92Aug27090030@server.alf.dec.com>
- Sender: news@netnews.alf.dec.com (USENET News System)
- Organization: Digital Equipment Corporation, Atlanta Customer Support Center
- Date: Thu, 27 Aug 1992 14:00:30 GMT
- Lines: 44
-
- POSTED FOR A FRIEND. PLEASE REPLY DIRECTLY TO HIM at
- ACDC018@SAUPM00.BITNET
-
- =============================================================================
-
- Hi:
-
- I wanted some help on the Magic router.
-
- We have a circuit with 126 gates placed on the layout floor using a placement
- program. We are using the maze router of MAGIC (:route command) to route
- the interconnections. The connections are specified by a Netlist file
- generated automatically.
- The router fails to get past the "Global Routing" stage after running for about
- 45 min. It just keeps on swapping, using very little cpu. Then it aborts
- saying that the system is out of "swap space" although we have 64Mb swap.
-
- It does not even route a 2-point net, if the terminals are far apart in the
- presence of all 126 gates, although
- it routes the Vdd and GND nets for the entire circuit in a few minutes.
- If we make smaller windows then it does route the nets inside it.
- We have tried with both small and large separation between cells.
- We have used the router with another, albiet regular structure, circuit
- with about 600 gates and had no PROBLEMS !, in a max of 10min ( no swapping ).
-
- We would be grateful for any hints on how to overcome this !
-
- With Thanks,
- Asjad Mumtaz
- Acdc018@Saupm00.Bitnet
-
- ___________________________________________________________________________
- Asjad M.T.Khan | Department of Computer Engineering
- KFUPM #606 | King Fahd University of Petroleum and Minerals
- Dhahran 31261 | Dhahran, Saudi Arabia
- Saudi Arabia |
- E-mail:Acdc018@SAUPM00 |
- _________________________|_______________________________________________
- --
-
- Jay Vassos-Libove libove@alf.dec.com
- Digital Equipment Corporation decwrl!alf.dec.com!libove
- Atlanta Customer Support Center Opinions? They're mine, mine, all mine!
- Alpharetta, Georgia and D.E.C. Can't have 'em!
-