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  • Where to place sample_values() for getting coverage in UVM RAL?

Where to place sample_values() for getting coverage in UVM RAL?

UVM 5516
#uvm 234 #UVM #RAL 51
Keiichi McGuire
Keiichi McGuire
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1 post
August 15, 2018 at 5:22 pm

As a brute force method, I can call sample_values() inside an always block @(posedge clk). However, this is not very performance efficient. I'm not quite clear on how a RAL's built in write()/read() API call goes through, but I imagine you could send the handle of the register model to the uvm_driver since before the transaction is over we could call sample_values() then. Is this recommended, or are there other methods users have had success with?

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mitesh.patel
mitesh.patel
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123 posts
June 24, 2019 at 3:25 am

In reply to Keiichi McGuire:

User need not to call sample_values() explicitly. User can configure Auto prediction (set_auto_predict(1) to default map), then at the end of every front door (write or read) operation, sample_values() will be called.

shahparth08
shahparth08
Full Access
10 posts
November 13, 2020 at 2:09 pm

how would it work in case if the set_auto_predict(0) and we have our own predictor. in that case how/where should the call to sample_values be made?

shahparth08
shahparth08
Full Access
10 posts
November 17, 2020 at 3:59 pm

In reply to shahparth08:

i tried adding sample_values() inside custom sample function which is used to collect coverage on bits and seemed to be the best option so far.

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