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AMS rolling back to the older version of ultrasim

01farhad10

I am seeing some strange behavior from the AMS simulator. I have changed the MMSIM version to 11.10 to use the most updated ultrasim simulator for multithread simulation. All the environment variables have been updated accordingly. However, when I try to simulate something the log files show that the older version of ultrasim (Version 7.1) is being used!

The interesting point is that when I am still in the same cadence session, if I use ADE for simulation it uses the newer version of ultrasim (Version 11.10). I am a little confused why the ADE can see the newer ultrasim but AMS doesn't? I appreciate any help in this respect.

Here is how my environment is set up:

$ echo $CDSHOME
/mscad/apps/Linux/cadence/IC61

$ echo $AMSHOME
/mscad/apps/Linux/cadence/IUS82

$ echo $IUSHOME
/mscad/apps/Linux/cadence/IUS82

$ echo $MMSIMHOME
/mscad/apps/Linux/cadence/MMSIM11.10

$ echo $LD_LIBRARY_PATH
/mscad/apps/Linux/cadence/MMSIM11.10/tools/lib:/mscad/apps/Linux/cadence/IUS82/tools/lib:/mscad/apps/Linux/cadence/IC61/tools/lib

$ echo $PATH
/mscad/apps/Linux/cadence/MMSIM11.10/tools/dfII/bin:/mscad/apps/Linux/cadence/MMSIM11.10/tools/bin:/mscad/apps/Linux/cadence/ASSURA410_FOR_614/tools/assura/bin:/mscad/apps/Linux/cadence/IUS82/tools/dfII/bin:/mscad/apps/Linux/cadence/IUS82/tools/bin:/mscad/apps/Linux/cadence/IC61/tools/dfII/bin:/mscad/apps/Linux/cadence/IC61/tools/bin  .....

 

 

Parents
  • Andrew Beckett
    The problem is that you've misunderstood how AMS works. AMS Designer is a standalone, single executable simulator. It is entirely contained within the INCISIV release stream (or its predecessor, the IUS stream). There is no need to have MMSIM installed to use it, and it doesn't use spectre or Ultrasim from the MMSIM stream if you do (the analog solver is a shared library in the INCISIV/IUS stream).

    So, if running spectre or Ultrasim, you're getting the simulator from the MMSIM11.1 stream, whereas if you're running AMS, the simulator (including the analog solver) is coming from the IUS82 stream. If you run "print_mmsimver" from the command line you'll see which MMSIM version AMS Designer was built with (and that's what you're seeing in the log files).

    You should use INCISIV111 if you want the latest release.

    Regards,

    Andrew
Reply
  • Andrew Beckett
    The problem is that you've misunderstood how AMS works. AMS Designer is a standalone, single executable simulator. It is entirely contained within the INCISIV release stream (or its predecessor, the IUS stream). There is no need to have MMSIM installed to use it, and it doesn't use spectre or Ultrasim from the MMSIM stream if you do (the analog solver is a shared library in the INCISIV/IUS stream).

    So, if running spectre or Ultrasim, you're getting the simulator from the MMSIM11.1 stream, whereas if you're running AMS, the simulator (including the analog solver) is coming from the IUS82 stream. If you run "print_mmsimver" from the command line you'll see which MMSIM version AMS Designer was built with (and that's what you're seeing in the log files).

    You should use INCISIV111 if you want the latest release.

    Regards,

    Andrew
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