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I trying to generate functional coverage using irun command.
I have given "-coverage functional" in the elab phase. I am not getting any of the data orirnted coverage. Can anybody knows what I am missing.
What sort of coverage are you expecting? SVA or PSL Assertions? SV, Specman or SystemC functional coverage groups?
In reply to StephenH:
In reply to MVERMA:
OK, in that case, a few things to check: did you call the constructor for your covergroups? Did you destroy the class instances before the end of the simulation (this would remove the coverage)?
When the simulation runs and exits, does it print a banner showing the details of the coverage files that are being dumped?
When elaborating the design, if you add the -messages switch do you see the summary table at the end of the log, showing how many SV covergroups there are?
Do you mean that the covergroups are instantiated only in modules / program blocks or interfaces, and not in classes? If so then my comment about classes being destroyed (garbage collected) is not relevant.
Are you sure that your covergroups are ever sampled?
One other thing: do you use "iccr" or "imc" to view the coverage results?
I would strongly recommend to use "imc" as it's much newer and has better analysis capabilities. The old iccr tool isn't being developed any more.
What's more, in iccr it doesn't show type-based funstional coverage, it can only show instance-based coverage, so if you didn't declare your coverage using the option.per_instance=1 then coverage will be collected but only for type-based, and iccr cannot show it. However if you use "imc" then it can show type-based and instance-based coverage. See http://support.cadence.com/wps/mypoc/cos?uri=deeplinkmin:ViewSolution;solutionNumber=11794766 for more info.