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spectre: fsdb output directly out of ADE

baenisch

Hi all

I'm working on a project based on IC6.1.3 with default MMSIM7.1 (which I can switch up to 10.1)

and I'm currently facing some large simulations and the waveform viewer is giving me the creeps ...

Therefore I tried some different formats that can be selected in the ADE Output Menu (sst2, psf ...)

but postprocessing, zooming and so on are still so sloooowwww. I searched through the

manual and found the possiblity to write fsdb. 

 

My problem is, that I get fsdb outputs if I run spectre from the command line with the output

set to fsdb, but I can't get it to work if I start simulations directly from ADE. I already set 

SPECTRE_DEFAULTS to -format fsdb but with no success. The switch seems to be

recognized, it's reported in the spectre-logfile but I don't get fsdb outputs :(

 

Can someone please give me some pointers on how to get fsdb as a default ?

At least until 6.15 is coming  with seems to get an all new waveform viewer

 

Best Regards

 

Andi

Parents
  • Andrew Beckett

    Andi,

    You might want to take a look at psfxl since that's a faster format which is supported within the environment. You need to be using a recent enough IC613 version (you need at least IC613 ISR14 and MMSIM71 ISR13) - better still IC614 and MMSIM101.

    The trouble with writing fsdb is that various things will break if you use this. That's because ADE expects a format it can read for doing things like operating point annotation and so on. So it's really only supported for a command line flow.

    Regards,

    Andrew.

Reply
  • Andrew Beckett

    Andi,

    You might want to take a look at psfxl since that's a faster format which is supported within the environment. You need to be using a recent enough IC613 version (you need at least IC613 ISR14 and MMSIM71 ISR13) - better still IC614 and MMSIM101.

    The trouble with writing fsdb is that various things will break if you use this. That's because ADE expects a format it can read for doing things like operating point annotation and so on. So it's really only supported for a command line flow.

    Regards,

    Andrew.

Children
  • LDIL
    in reply to Andrew Beckett

    Hi Andrew. Is this true for Maestro too?

  • Andrew Beckett
    in reply to LDIL

    Actually, it's not really anything to do with ADE L/XL/Explorer/Assembler, but more to do with the fact that things have changed since a response 10 years ago.

    You can (on Outputs->Save All) pick the output format to be "fsdb" and that impacts transient simulation; the other analysis types continue to output PSF. ViVA (in the meantime) supports reading FSDB too, so you can plot the transient data as well as handling the other output data formats.

    That said, unless you really need FSDB for other tools, I don't see much really to use it - PSF XL is smaller now as well as being fast (it has a lossless compression) for transient data and has been optimised for use with ADE.

    Regards,

    Andrew.

  • ShawnLogan
    in reply to LDIL

    Dear LDIL,

    I am not Andrew, and will never pretend to be with his extended background and knowledge. Nevertheless,  this is 10 year old post, and many things have changed in the Cadence tools. To be honest, I am not clear on your specific question. Assembler and Explorer both can enable spectre to write its output data in  fsdb format. In Figure 1, from an Explorer session I happened to have open, I've circled the option to write spectre's data in fsdb format. I use this format for some tools that require it.

    Is that your question?

    Shawn

    Figure 1

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