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Difference between Virtuoso_Acceler_Parallel_sc and Virtuoso_Multi_mode_Simulation

debaabed

Hi,

For running simulation, Spectre typically uses licenses from  Virtuoso_Multi_mode_Simulation pool. We have seen that with +mt=1, +aps license are picked up from Virtuoso_Acceler_Parallel_sc. What is the difference between these two licenses? Can APS run without Virtuoso_Acceler_Parallel_sc and take licenses from Virtuoso_Multi_mode_Simulation? 

Please can someone shed some light in this license options. 

PS: I have very less knowledge on the various license features Spectre provides.

  • Andrew Beckett

    We have two styles of license with the Spectre family. There are the à la carte licenses which are for the individual products (so there are individual licenses for Spectre, APS single core, Spectre RF, XPS, UltraSim etc), and then the multi-mode simulation tokens. The default behaviour is for spectre to try the individual product licenses first before choosing the flexible token licenses, but that can be overridden.

    From the spectre command line it would be:

    spectre +lorder MMSIM 

    or

    spectre +lorder MMSIM:PRODUCT

    For ADE (before you start ADE, so it could go in your .cdsinit for example):

    envSetVal("spectre.envOpts" "licOrder" 'string "MMSIM:PRODUCT")

    This will then cause ADE to invoke spectre with the +lorder switch with that value.

    Regards,

    Andrew

  • debaabed
    in reply to Andrew Beckett

    Hi Andrew,

    Thanks for the quick reply.

    Virtuoso_Acceler_Parallel_sc refers to spectre APS single core? Running APS doesn't necessarily mean that license will be used from Virtuoso_Acceler_Parallel_sc? Having only MMSIM tokens should be fine?

  • Andrew Beckett
    in reply to debaabed

    You can either run APS with Virtuoso_Acceler_Parallel_sc (for single core) or Virtuoso_Acceler_Parallel_sc plus one or more Virtuoso_MMSIM_CPU_Accelerator license features (depending on the number of cores used if multi-threaded; I won't go into the details here in a public forum). Or you can run it using entirely MMSIM tokens. So running with MMSIM tokens would be fine.

    Andrew.

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