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Merging code coverage from two different test benches

Nilesh Goswami
Hi

I am facing issue while merging code coverage from two different test benches.

Here is my testbench and tools :

One test bench(A) is written in SV and other test bench(B) is written in Verilog.

I am using IUS62 to run test cases and ICCR to merge coverage and generate report.

Both testbenches are pointing to same RTL core but the hierarchy is different.

I ran test case in both the environment and tried to merge code coverage report.

Here, ICCR is not loading the test because different model file (<checksum>.model) are generated.

I would like to know which are the points I should take care while running the test case and while merging coverage.

Please let me know your inputs.

Thanks & Regards,

Nilesh Goswami
Parents

  • Hi Mickey,

     Thanks for quick reply.

     We tried with your inputs. To be honest, we are not able to merge yet.

     I would like to have one more input here. For irun based testbench we have used " -covdut <module_name>"  and for ncsim testbench we have used "-input <file_name>" and that file contains "coverage -dut x.y.z" .

    Clearly, irun command uses module base and ncsim uses instance based. Does that matter at merge ? If yes, then how to solve?  

    Both Testbeches shows the same model name (489eaa3b_00000000.model), I believe that indicates same coverage database generated.

     As Nilesh has mentioned, we are able to load both successfully at ICCR and while merge command it shows warning. 

     

    With your inputs, I am able to generate the individual testbench reports and that shows the intended module/instance at top. But while merge it shows "0 %" 

     

    Thanks & Regards,

    Kinjal Shah

    kinjal.shah@einfochips.com 

Reply

  • Hi Mickey,

     Thanks for quick reply.

     We tried with your inputs. To be honest, we are not able to merge yet.

     I would like to have one more input here. For irun based testbench we have used " -covdut <module_name>"  and for ncsim testbench we have used "-input <file_name>" and that file contains "coverage -dut x.y.z" .

    Clearly, irun command uses module base and ncsim uses instance based. Does that matter at merge ? If yes, then how to solve?  

    Both Testbeches shows the same model name (489eaa3b_00000000.model), I believe that indicates same coverage database generated.

     As Nilesh has mentioned, we are able to load both successfully at ICCR and while merge command it shows warning. 

     

    With your inputs, I am able to generate the individual testbench reports and that shows the intended module/instance at top. But while merge it shows "0 %" 

     

    Thanks & Regards,

    Kinjal Shah

    kinjal.shah@einfochips.com 

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