I am trying to run a coverage regression using the NC tool from Cadence. I can see RTL coverage, but functional coverage in the scoreboard is missing. How can I add this scoreboard to the covdut option in NCSIM arguments? The scoreboard contains covergroups.
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toolic
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silentNinJa
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Is this a UVM scoreboard? – Greg Feb 18 '14 at 20:02
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Yes, it is UVM scoreboard. – silentNinJa Feb 18 '14 at 20:32
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I am viewing it using IMC. And nope, there are no warning messages whatsoever. – silentNinJa Feb 19 '14 at 09:15
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By default, Incisive does not collect functional coverage. You need to enable it with the compile-time -covfile option, specifying select_functional.
Also, in the source code, you must explicitly call the sample function on all covergroups (this applies to all simulators).
toolic
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1Thanks a lot! I was already using these coverpoints in VCS simulations without any issues, so the triggering of coverpoints is ok. Here is what I did to get it working in NC: 1) Add select_functional in the ccf covfile 2) Add option.per_instance=1; in the covergroup declaration – silentNinJa Feb 19 '14 at 09:13
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1You can also say irun -coverage a ... so that you don't use any extra file and have everything in one place in your compile script. – Tudor Timi Feb 19 '14 at 09:17