Thursday, January 08, 2009     Register | Login | Search | Contact Us
     
   
     
     

Many of you already received communications about the move of the Cadence user community into cadence.com. And many of you have already joined, with over 4000 registrations in the first two weeks.

The new Cadence Community enhances the ability of Cadence users to connect and collaborate. In addition to moving the community into cadence.com -- enabling single sign-on for community, Sourcelink and Cadence events -- the new site is organized around nine technology segments, giving you easy access to product information, training, forums and blogs. Some of the new features include:
  • Ability to respond to posts via e-mail
  • Technology-specific blogs
  • Latest Web 2.0 social networking capabilities
  • Public profile options
  • Private messaging
  • Friends lists
Visit the new Cadence Community today at www.cadence.com/community and join the discussions!

Registration note: Due to the scope of the enhancements and the new SSO registration system, we were not able to migrate existing cdnusers.org member accounts. So new registrations are required, but this enables a broader set of functionality we think you'll enjoy.

Forum note: Under the guidance of forum moderators, we have taken the 20+ cdnusers.org forums and consolidated them into 11 forums on the new site. Posts have been brought over so you can leverage that posting history. CDNusers forums will be set to read only starting 7/30, and cdnusers.org will be redirected to the new community on 8/4.

Best regards,
Mike and Tom

Michael A. Catrambone - Steering Committee Chairman
Distinguished Engineer
PCB/Mechanical
UTStarcom, Inc.

Tom Diederich
Cadence Community Manager
Home
Forums
Forums > Functional Verification > Assertion-Based Verification and Formal Analysis

Subject: HOWTO: Proving a single property with parallel engines runs
Posting to forums is available to community members only.
Login or Register
Rate this topic:
   
Author Messages
jb
Posts: 16
Online: User is Offline
10/19/2007 9:50 AM  
Single-Property, Multi-Engine Distribution
IFV now supports running multiple engines in parallel to prove assertions.  You can take advantage of multi-core/multi-CPU machines to maximize performance and reduce proof runtimes.  There is no need to experiment with engines and no need for multiple IFV runs with different engines.  You now can run all available engines in parallel. 

You can enable this capability by simply supplying a list of engines to the define engine command.  Three engines (sword, axe and bow) are now supported in distribution.  More engines will become available in subsequent IFV releases.

Example settings:

# Select 3 engines to run in parallel
define engine sword axe bow

# Select 2 engines to run in parallel
define engine sword axe

Note the following regarding distribution:

    • If more engines than available cpus are specified on a resource, IFV will generate an error and ignore the engine setting.  Users can override this by the cpu_sharing on  setting:

      # Enable more engines to run than available cpus on a machine
      define cpu_sharing on
    • When submitting jobs via LSF, remember to reserve appropriate number of cpus for the job.  Please consult your IT professional on specific instructions for requesting appropriate number of free cpus to run IFV on a single machine. 

      In general you need to specify the –n option (requests specified free cpu resources) to bsub and specify span[hosts=1] (keeps the cpu reservation on the same machine) in the resource specification (-R argument).
    • At this time no_deadlock FSM checks are not supported in distribution.  You will need to define a single engine if you chose to run no_deadlock FSM checks.
Posting to forums is available to community members only.
Login or Register
Forums > Functional Verification > Assertion-Based Verification and Formal Analysis > HOWTO: Proving a single property with parallel engines runs


ActiveForums 3.6
     
Copyright 2006 Cadence Design Systems, Inc.