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KenKundert / psf_utils

Read Spectre PSF files
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psf.trn transfer to psf.csv ---data transfer #15

Closed 1232233s closed 2 years ago

1232233s commented 2 years ago

command :simvisdbutil psf.trn -csv -timeunits s -output psf.csv my psf.trn is almost 392M.(data space) but the psf.csv reach out to 19G. it's pretty large.

KenKundert commented 2 years ago

Unfortunately, psf_utils is only suitable for relatively small PSF ASCII files. I don't know why, but Cadence makes it difficult to build your own analysis tools for Spectre results. Specifically, as far as I am aware, they offer no Python libraries for reading their data files and they do not document their formats so one could write one's own reader. I created psf_utils for my needs and I no longer simulate large circuits so the low density of the PSF ASCII files was not a problem for me, but the fact that I could easily view the structure of the files and use that information to construct a parser made the work tractable.

At this point I am done. psf_utils meets my needs as it is, and I suspect it would be a significant amount of unpleasant work to try to reverse engineer the PSF binary format, so I have no plans to do so. Also I have no plans to write an SST file reader. Again, I currently have no need for one.

1232233s commented 2 years ago

your lib is very cool . yeh , i know there is a API to access SST file, it was very convenient and quickly . maybe it is a good solution for this problem.