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Found 2 results

  1. verif_learner
    I would like to know what is the recommended place to implement functional coverage 1) non temporal functional coverage - coverpoints I understand these can be implemented in monitors, scoreboards, subscribers, coverage collectors (though I don't know what the last 2 really are) 2) temporal functional coverage - cover directives I understand these can be implemented in interfaces, modules or programs
  2. ljepson74
    While I am waiting for an answer from the simulator vendor, I think I can form a non-tool-specific question about my problem. I am running a simulation which dies when I collect functional coverage. I can turn on/off functional coverage collection and when it is on, at the very end of simulation, I get: "ncsim: *F,INTERR: INTERNAL EXCEPTION". It seems to be that while coverage is gathered, the problem occurs. I can run tests which flow thru some channels of the dut and don't have the problem, but thru a specific channel of the dut, I often encounter the problem. question1: What is classified as functional coverage? I'd like to leave functional coverage collection on and comment out all coverpoints/covergroups. (Actually I think I have, or am close, and the error still occurs.) So, I am wondering, what must I grep for to remove to be sure that functional coverage collection has no meaning? My thought is to divide and conquer. Am I not just looking for "coverpoint" and "covergroup", but also "assert" (as some code might have assertion based functional coverage)? Is there anything else? question2: (This is perhaps a bit tool specific.) If the -covdut, or scope of where coverage should be gathered is targetted to a sub-sub-module, would you expect that (possibly bad) coverage code at a higher level (or different area) would have zero affect on the coverage collection? (I've unsuccessfully tried to leave functional coverage collection on, but to move the target-scope to a trival part of the design, to see if the problem goes away.)
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