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Coverage using "iccr"

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Hi Friends,
  I am doing Coverage  in the Master Monitor for my uVC. I have created a Covergroup which contains 3 coverpoints for Covering Address,Data and Direction. I am using "iccr" for viewing Functional Coverage results but WHen i look in to the DATA-ORIENTED coverage  I am getting two Instances of of single Coverpoints,say for ex: trans_addr is the coverpoint
    1) top.urm_test_top.sve.env.master_agent.monitor.cov_trans.trans_addr   
     2)top.xyz_master_monitor::cov_trans.trans_addr
I Cant understand why the 2nd instance is being Created though there is No Instance or Handle from top to Master monitor !!

And also I can see a Message as "Displaying 13 coverage points". Here I cant Understand y 13 coverpoints are created though i have specified 3 coverpoints in the covergroup !!
 
Regards,
Ramesh Pal


Originally posted in cdnusers.org by ramesh_pal_yadav
Parents

  • Hi TAM,
    From your explanation I understood that for an 'n' covergroups there will n+1 coverage reports => n for each covergroup and 1 for combined coverage.Am i right?? 
    In my case i have defined 3 covergroups and Still i am getting the same result as above mentioned i.e I am getting two Instance s of each covergroups.
      1) representing all the Hierarchy
      2) using scope Resolution Operator. 

    MASTER side
    ------------------
    covergroup cov_trans @cov_transaction;
               trans_addr : coverpoint master_transaction_collected.addr_p;/* {
                                            option.auto_bin_max = 64; } */
               trans_data : coverpoint master_transaction_collected.wdata_p  {
                                            option.auto_bin_max = 64; }
    endgroup : cov_trans

         covergroup cov_trans_ctrl @ cov_tran_ctrl;
              trans_dir  : coverpoint master_transaction_collected.direction_p;
     endgroup : cov_trans_ctrl

         cov_trans = new();
          cov_trans.set_inst_name({get_full_name(), ".cov_trans"});

          cov_trans_ctrl = new();
          cov_trans_ctrl.set_inst_name({get_full_name(), ".cov_trans_ctrl"});     // Constructors

    SLAVE side
    -----------------
    covergroup cov_trans @cov_transaction;
         trans_rdata : coverpoint slave_transaction_collected.rdata_p;
    endgroup : cov_trans                    //  SLAVE side Coverage        

    cov_trans = new();
          cov_trans.set_inst_name({get_full_name(), ".cov_trans"
              
    This is how the coverage is implemented.
    addr_p , data_p , rdata_p are 32 bit and direction_p is Enum type of 3 values.

    I am still unsure of
    a) Creation of Instance using scope resolution operator
    b) What the " 13 coverage points" mean....this message is shown beside the "filter" dropdown option  in the iccr 6.2 version.

    When coming to No.of Bins Creation i am getting Minimum 64 bins for my 32 bit  addr,data.But i cant understand Why " On;y 13 coverage points are created!!


    Thanks and Regards,
    Ramesh







    Originally posted in cdnusers.org by ramesh_pal_yadav
Reply

  • Hi TAM,
    From your explanation I understood that for an 'n' covergroups there will n+1 coverage reports => n for each covergroup and 1 for combined coverage.Am i right?? 
    In my case i have defined 3 covergroups and Still i am getting the same result as above mentioned i.e I am getting two Instance s of each covergroups.
      1) representing all the Hierarchy
      2) using scope Resolution Operator. 

    MASTER side
    ------------------
    covergroup cov_trans @cov_transaction;
               trans_addr : coverpoint master_transaction_collected.addr_p;/* {
                                            option.auto_bin_max = 64; } */
               trans_data : coverpoint master_transaction_collected.wdata_p  {
                                            option.auto_bin_max = 64; }
    endgroup : cov_trans

         covergroup cov_trans_ctrl @ cov_tran_ctrl;
              trans_dir  : coverpoint master_transaction_collected.direction_p;
     endgroup : cov_trans_ctrl

         cov_trans = new();
          cov_trans.set_inst_name({get_full_name(), ".cov_trans"});

          cov_trans_ctrl = new();
          cov_trans_ctrl.set_inst_name({get_full_name(), ".cov_trans_ctrl"});     // Constructors

    SLAVE side
    -----------------
    covergroup cov_trans @cov_transaction;
         trans_rdata : coverpoint slave_transaction_collected.rdata_p;
    endgroup : cov_trans                    //  SLAVE side Coverage        

    cov_trans = new();
          cov_trans.set_inst_name({get_full_name(), ".cov_trans"
              
    This is how the coverage is implemented.
    addr_p , data_p , rdata_p are 32 bit and direction_p is Enum type of 3 values.

    I am still unsure of
    a) Creation of Instance using scope resolution operator
    b) What the " 13 coverage points" mean....this message is shown beside the "filter" dropdown option  in the iccr 6.2 version.

    When coming to No.of Bins Creation i am getting Minimum 64 bins for my 32 bit  addr,data.But i cant understand Why " On;y 13 coverage points are created!!


    Thanks and Regards,
    Ramesh







    Originally posted in cdnusers.org by ramesh_pal_yadav
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