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How to run a regression for multiple testcases with only a single compile using NCsim?

ReubenMijares

Hi,


I would like to do a regression and it requires multiple testcases.

I did this by writing a Bash script which loops until all the testcases are simulated.

However, this loop will repeatedly compile. Is there a way to do only a single compile and then run multiple testcases without recompiling?

Thanks.

Regards,

Reuben

  • Hi Reuben.

    Once you have compiled the first time (before entering the loop in your script), a "simulation snapshot" is written into INCA_libs.

    For subsequent runs this snapshot should be automatically reused if you don't change the file list or any irun options that would trigger a recompile (for example changing a -define option). However you can explicitly ask irun to use the previously elaborated simulation snapshot, by passing the -R option to irun. You would normally do this instead of passing any source file names, but if you do pass source files to irun -R, it'll ignore the files and issue a warning.

    So your simple regression flow would look like:

    irun -elaborate *.sv -uvm

    for testname in $(cat testlist); do

    irun -R +UVM_TESTNAME=$testname

    done

  • Hi Reuben,

    instead of using (and probably continually extending and improving) your bash script, you may want to take a look at VUnit (http://vunit.github.io/) for running your regressions. There is an "incisive" branch on GitHub that supports irun. If you have any feedback, please use one of the ways provided on the VUnit website.

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