Coverage not getting hit when trying with IUS simulator

Can you provide more details of your cover group? Sharing an example would be extremely helpful. Please show the cover group trigger and explain how the trigger signal is generated.

Thanks,
Tim

Thanks tim for your response.

Let me give an example :

class A extends def_cov_data_callback;

covergroup transaction_type@(xact_sample);
    type_option.comment = "coverage";
    option.per_instance = 1;

    cmd : coverpoint xact.cmd iff((xact.set_ccc == 0) && (xact.data_type == `ABC)) 
    {
      option.comment = "This coverpoint captures coverage of commands sent by Master";
      bins write_cmd     = {WRITE};
      bins read_cmd      = {READ};
    }

    broadcast_header : coverpoint xact.broadcast_header
    {
      option.comment = "This coverpoint captures coverage of commands sent by Master";
      bins with_brdcast_header     = {1};
      bins without_brdcast_header  = {0};
    }

.....

....

and so on

endgroup

endclass

This xact_sample is event which is declared in file "cov_data_callback.sv"

class cov_data_callback extends callback;

event xact_sample;

function transaction_observed_cov()

...

$display("PRINTING XACT")

xact.print(); ----------------------------------- Till this point my displays come fine in the log with IUS , I see correct values but still bin doesn't hit.

->this.xact_sample

endfunction

endclass

Let me know if you need any other information

Regards

Anika

Thanks tim for your response.

Let me give an example :

class A extends def_cov_data_callback;

covergroup transaction_type@(xact_sample);
    type_option.comment = "coverage";
    option.per_instance = 1;

    cmd : coverpoint xact.cmd iff((xact.set_ccc == 0) && (xact.data_type == `ABC)) 
    {
      option.comment = "This coverpoint captures coverage of commands sent by Master";
      bins write_cmd     = {WRITE};
      bins read_cmd      = {READ};
    }

    broadcast_header : coverpoint xact.broadcast_header
    {
      option.comment = "This coverpoint captures coverage of commands sent by Master";
      bins with_brdcast_header     = {1};
      bins without_brdcast_header  = {0};
    }

.....

....

and so on

endgroup

endclass

This xact_sample is event which is declared in file "cov_data_callback.sv"

class cov_data_callback extends callback;

event xact_sample;

function transaction_observed_cov()

...

$display("PRINTING XACT")

xact.print(); ----------------------------------- Till this point my displays come fine in the log with IUS , I see correct values but still bin doesn't hit.

->this.xact_sample

endfunction

endclass

Let me know if you need any other information

Regards

Anika

Here is the complete code I generated based on your example:

typedef enum bit {READ, WRITE} cmd_e;
typedef enum bit {ABC, XYZ} data_e;

class xact_c;
  rand cmd_e  cmd;
       bit    set_ccc;
  rand data_e data_type;

  constraint cmd_const {data_type dist {ABC := 1, XYZ := 1};}  
  constraint type_const {data_type dist {ABC := 1, XYZ := 1};}

  function void print();
    $display("xact print %n, %b, %n", cmd, set_ccc, data_type);
  endfunction
endclass

class cov_data_callback;
  event xact_sample;
  xact_c xact = new();

  function void transaction_observed_cov();
    $display("PRINTING XACT");
    xact.print();
    //Till this point my displays come fine in the log with IUS
    //I see correct values but still bin doesn't hit.
    ->this.xact_sample;
  endfunction
endclass

class A extends cov_data_callback;
  covergroup transaction_type @(xact_sample);
    type_option.comment = "coverage";
    option.per_instance = 1;
    cmd : coverpoint xact.cmd iff((xact.set_ccc == 0) && (xact.data_type == ABC))
    {
      option.comment = "This coverpoint captures coverage of commands sent by Master";
      bins write_cmd = {WRITE};
      bins read_cmd = {READ};
    }
  endgroup

  function new();
    super.new();
    transaction_type = new();
  endfunction
endclass

module test;
  A grpTest = new();
  initial begin
    repeat (10) begin
      #1 void'(grpTest.xact.randomize());
      grpTest.transaction_observed_cov();
    end
  end
endmodule

The output is:

PRINTING XACT
xact print WRITE, 0, ABC
PRINTING XACT
xact print WRITE, 0, XYZ
PRINTING XACT
xact print WRITE, 0, ABC
PRINTING XACT
xact print WRITE, 0, XYZ
PRINTING XACT
xact print WRITE, 0, ABC
PRINTING XACT
xact print WRITE, 0, XYZ
PRINTING XACT
xact print READ, 0, ABC
PRINTING XACT
xact print WRITE, 0, XYZ
PRINTING XACT
xact print WRITE, 0, ABC
PRINTING XACT
xact print WRITE, 0, XYZ

And the coverage is:

So with my example, the coverage report is lining up with the displayed output.

Tim