( ESNUG 377 Item 22 ) ------------------------------------------- [09/19/01]
From: "Paul Stuverud" <Paul.Stuverud@Unisys.Com>
Subject: Synopsys SmartModels Run *Painfully* Slow On Cadence NC-SIM VHDL
Hi, John,
We are running a Synopsys SmartModel for a vendor's proprietary ASIC hard
core on Cadence VHDL NC-SIM3.2. The SmartModel version runs in approx. 45
minutes on the NC-SIM simulator (same TestBench). We have also tried NC-SIM
versions 3.0, 3.1 & 3.3 with roughly similar results. We have also tried
both Sun and HP platforms with roughly similar results. The same SmartModel
runs in approx. 5 minutes on the Modeltech MTI simulator (same TestBench).
This is for both Sun and HP platforms. This is approx. 10X the performance
of NC-SIM. (By the way, the uncompiled native code model runs in less than
1 minute on the NC-SIM simulator.)
Has anyone else experienced relatively poor performance of SmartModels on
NC-SIM when compared to the MTI simulator? Is there some inherent difference
between the two simulators that would explain the difference is simulation
times? Is the NC-SIM poor performance limited solely to VHDL simulations or
does it include both VHDL and Verilog simulations? Is there anything that
can be done to resolve this problem?
- Paul Stuverud
Unisys Corp.
( ESNUG 377 Networking Section ) -------------------------------- [09/19/01]
Silicon Valley, CA -- Dave Chapman, BSCS/MSEE, lots of verification exper.,
seeks contract in the bay area starting Oct 2. "dchapman@goldmountain.com"
============================================================================
Trying to figure out a Synopsys bug? Want to hear how 11,000+ other users
dealt with it? Then join the E-Mail Synopsys Users Group (ESNUG)!
!!! "It's not a BUG, jcooley@world.std.com
/o o\ / it's a FEATURE!" (508) 429-4357
( > )
\ - / - John Cooley, EDA & ASIC Design Consultant in Synopsys,
_] [_ Verilog, VHDL and numerous Design Methodologies.
Holliston Poor Farm, P.O. Box 6222, Holliston, MA 01746-6222
Legal Disclaimer: "As always, anything said here is only opinion."
The complete, searchable ESNUG Archive Site is at http://www.DeepChip.com
|
|
