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spectre transient analysis displays only part of the total transient time

Ueue

Dear all,

Occasionally, after a long session of simulations it happens that the plot outputs only show part of the total transient time.

If you exit and restart cadence, the problem is solved for some time, until it happens again.

The spectre version we are using is 5.1.0.

Thanks a lot,
Stefano

  • Stefano,

    I believe this is usually a problem when using SST2 as the output format (which is the default). Try using:

    envSetVal("spectre.envOpts" "simOutputFormat" 'string  "psfbin")

    in the .cdsinit . You'll also want to be setting these UNIX environment variables before starting icfb:

    For Spectre or APS writing PSF data:
      setenv PSF_WRITE_CHUNK_MODE_ON true

    For UltraSim writing PSF data:
      setenv PSF_LARGE_FILE_ON false

    This is so that large files (>2G) are written by spectre from MMSIM releases such that they can be read by IC5141. The large file read support is only enabled in IC61X, so the env vars are to tell spectre/UltraSim to revert to the old-style "split" psf files.

    Regards,

    Andrew.

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