run time issue questa sim

[Attaluri]

I ran a testcase using questa sim,i am getting following output.

 

 

** Error: (vsim-3601) Iteration limit reached at time 0 ps

 

 

testcase run phase look like this. it printed info messages from below code then gave above mentioned error.

 

  task run_phase(uvm_phase phase);

    phase.raise_objection(this);

 

    `uvm_info(get_type_name(), "Starting test",UVM_NONE)

 

    // generate register settings

    assert (m_cfg_gen.randomize()) else

    `uvm_fatal(get_name(),"m_cfg_gen randomization failed");

 

    `uvm_info(get_type_name(), $psprintf("Using this configuration:\n%s",m_cfg_gen.sprint()),UVM_MEDIUM)

    

 

    #20000ns;

    phase.drop_objection(this);

    `uvm_info(get_type_name(), "Stopping test...", UVM_LOW );

 

    endtask : run_phase

 

Please help me in resolving this

[dave_59]

You can usually get more verbose help about an error message from Questa by typing verror NNNN

In this case type verror 3601.

[Attaluri]

my simulation got struck at 0ns. how to put break points in code to debug step by step.

[Attaluri]

Thanks Dave.could you please help me on how to place break points in existing code.

[dave_59]

You'll need to look at the Questa User Manual to learn how to set a breakpoint. There are also commands you can use to find out where the simulator was executing at the time of the limit was reached. You might also try increasing the limit to 1000000.

[Attaluri]

Hi Dave -- I have gone through manual and used file break points.

I figured out simulator is looping through below code in  

file :-   uvm-1.1d/src/base/uvm_task_phase.svh 

function:virtual function void execute(uvm_component comp,

                                          uvm_phase phase);

my concern here is thier is not exactly any loop in this code .but stepping is only looping from top to bottom of below code.

 

 

        // reseed this process for random stability

        proc = process::self();

        proc.srandom(uvm_create_random_seed(phase.get_type_name(), comp.get_full_name()));

 

        phase.m_num_procs_not_yet_returned++;

 

        if ($cast(seqr,comp))

          seqr.start_phase_sequence(phase);

 

        exec_task(comp,phase);

 

        phase.m_num_procs_not_yet_returned--;

[Attaluri]

Hi Guys could you please help me here why questa looping back and forth on above code

[tudor.timi]

I'm pretty sure the problem is somewhere else in your code, because that is UVM BCL code. You probably have an endless loop somewhere which is pretty difficult (or better said impossible) to debug on a forum.