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Paul Geraedts

Community Member

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GIGO

Posts: 60
Enschede, Netherlands

restart=yes in PSS
Sep 22^nd, 2006, 5:00am

Hi all,

It turns out a PSS analysis is still using knowledge from previous runs, even if you set restart to yes. This can be observed by starting the same PSS beginning from the same initial condition file multiple times (just clicking multiple times on the netlist&run button, basically :).

A work-around seems to be clicking on simulation->netlist->recreate, before clicking on the netlist&run button.

By the way, can anyone tell me what the difference is between simulation->netlist->create and simulation->netlist->recreate?

Paul

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Andrew Beckett

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Life, don't talk to
me about Life...

Posts: 1742
Bracknell, UK

Re: restart=yes in PSS
Reply #1 - Jan 15^th, 2007, 2:58am

You can also use the "reorder_matrix=yes" setting on the Simulation->Options->Analog to force the matrix to be rebuilt from scratch.

Netlist->Create uses the incremental netlisting, and only recreates the netlists for blocks which have changed since the last time they were netlisted, and then reassembles the complete netlist from these netlisted pieces (in the ihnl dir). Netlist->Recreate forces it to recreate the netlist for every single cellView, regardless of whether it needs to or not. The latter forces
the simulator to restart, rather than starting from where it left off. Netlist->Create will only tell the simulator to restart if one of the sub-netlists got recreated.

In older versions (before reorder_matrix came in), you can also use:

Code:

envSetVal("spectre.envOpts" "controlMode" 'string "batch")

to tell ADE to restart spectre after each point in a parametric sweep. However, this won't help with a sweep performed on the pss form itself, since that uses a spectre built-in sweep.

Regards,

Andrew.

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Paul Geraedts Community Member Offline GIGO Posts: 60 Enschede, Netherlands	Re: restart=yes in PSS Reply #2 - Jan 15^th, 2007, 3:37am Thanks Andrew! I presume you mean 'rebuild_matrix=yes'? (I'm using a rather recent version and I can't find the one you mentioned.) Kind regards, Paul
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Andrew Beckett Senior Fellow Offline Life, don't talk to me about Life... Posts: 1742 Bracknell, UK	Re: restart=yes in PSS Reply #3 - Jan 15^th, 2007, 5:53am Er, yes, that's what I meant. I'll use the excuse of being a little jetlagged after getting back from the US on Saturday :-[ Andrew.
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