UVM phase jumping to extract phase

[sharvil111]

When jumping form run phase to extract phase, the UVM BCL somehow invokes the extract phase twice. But when jumping from run phase to final phase, the final phase is invoked once only. Here I am using uvm_domain to jump from one phase to another.

In the following pseudo code, the jump does not happen for extract phase. Moreover the extract phase display is coming twice. While the jump happens gracefully when jumping to final phase.

package pkg;
  import uvm_pkg::*;
  
  class env extends uvm_env;
    `uvm_component_utils(env)
    
    int m_delay;
    
    function new (string name, uvm_component parent);
      super.new(name, parent);
    endfunction
    
    function void build_phase(uvm_phase phase);
      if (!uvm_config_db#(int)::get(this, "", "delay", m_delay))
        `uvm_fatal("", "Delay missing from config db")
    endfunction

    task run_phase(uvm_phase phase);
      `uvm_info(get_full_name(), "run_phase called", UVM_MEDIUM)
      phase.raise_objection(this);
      repeat(5) #(m_delay);
      phase.drop_objection(this);
      `uvm_info(get_full_name(), "run_phase returning", UVM_HIGH)
    endtask
      
    function void extract_phase(uvm_phase phase);
        `uvm_info(get_full_name(),"this is extract phase",UVM_LOW)
    endfunction
    function void check_phase(uvm_phase phase);
        `uvm_info(get_full_name(),"this is check phase",UVM_LOW)
    endfunction
    function void report_phase(uvm_phase phase);
        `uvm_info(get_full_name(),"this is report phase",UVM_LOW)
    endfunction
    function void final_phase(uvm_phase phase);
        `uvm_info(get_full_name(),"this is final phase",UVM_LOW)
    endfunction
  endclass

  class test extends uvm_test;
    `uvm_component_utils(test)
    
    function new (string name, uvm_component parent);
      super.new(name, parent);
    endfunction
    
    env m_env1;
    uvm_domain domain1;
    
    function void build_phase(uvm_phase phase);
      // Use different delays to see that domain1 and domain2 run independently
      uvm_config_db#(int)::set(this, "m_env1", "delay", 100);
      
      m_env1 = env::type_id::create("m_env1", this);
      
      domain1 = new("domain1");
      m_env1.set_domain(domain1);
    endfunction
    
    task run_phase(uvm_phase phase);   
      phase.raise_objection(this);
      #5;
      // this is for domain1 to jump to respective phase phase
      if(!$test$plusargs("JMP_FINAL_PH")) begin
        `uvm_info(get_type_name(),"Jumping to extract phase now...",UVM_LOW)
        domain1.jump(uvm_extract_phase::get()); // This calls extract phase twice!!
        //phase.jump(uvm_extract_phase::get()); // This calls extract phase once only
      end
      else begin
        `uvm_info(get_type_name(),"Jumping to final phase now...",UVM_LOW)
        domain1.jump(uvm_final_phase::get()); // This calls final phase once. Under any circumstance
      end
      phase.drop_objection(this);
    endtask
  endclass
endpackage


module top;

  import uvm_pkg::*;
  import pkg::*;

  initial run_test("test");
  
endmodule

Output is as follows:

// Jumping from run_phase to extract_phase:

UVM_INFO @ 0: reporter [RNTST] Running test test...
UVM_INFO phase_jump.sv(20) @ 0: uvm_test_top.m_env1 [uvm_test_top.m_env1] run_phase called
UVM_INFO phase_jump.sv(66) @ 5: uvm_test_top [test] Jumping to extract phase now...
UVM_INFO 1800.2-2017-0.9/src/base/uvm_phase.svh(1579) @ 5: reporter [PH_JUMP] phase post_shutdown (schedule uvm_sched, domain domain1) is jumping to phase extract
UVM_INFO phase_jump.sv(28) @ 500: uvm_test_top.m_env1 [uvm_test_top.m_env1] this is extract phase
UVM_INFO phase_jump.sv(28) @ 500: uvm_test_top.m_env1 [uvm_test_top.m_env1] this is extract phase
UVM_INFO phase_jump.sv(31) @ 500: uvm_test_top.m_env1 [uvm_test_top.m_env1] this is check phase
UVM_INFO phase_jump.sv(34) @ 500: uvm_test_top.m_env1 [uvm_test_top.m_env1] this is report phase
UVM_INFO phase_jump.sv(37) @ 500: uvm_test_top.m_env1 [uvm_test_top.m_env1] this is final phase
UVM_INFO 1800.2-2017-0.9/src/base/uvm_report_server.svh(802) @ 500: reporter [UVM/REPORT/SERVER] 

// Jumping from run_phase to final_phase:

UVM_INFO @ 0: reporter [RNTST] Running test test...
UVM_INFO phase_jump.sv(20) @ 0: uvm_test_top.m_env1 [uvm_test_top.m_env1] run_phase called
UVM_INFO phase_jump.sv(71) @ 5: uvm_test_top [test] Jumping to final phase now...
UVM_INFO 1800.2-2017-0.9/src/base/uvm_phase.svh(1579) @ 5: reporter [PH_JUMP] phase post_shutdown (schedule uvm_sched, domain domain1) is jumping to phase final
UVM_INFO phase_jump.sv(37) @ 5: uvm_test_top.m_env1 [uvm_test_top.m_env1] this is final phase
UVM_INFO 1800.2-2017-0.9/src/base/uvm_report_server.svh(802) @ 5: reporter [UVM/REPORT/SERVER] 

Can anyone let me know what am I missing anything over here?

[hbhbts]

as you define a domain1 phase with the run_phase, so when the run_phase complete, extract phase will scheduled for last phase to run. at the same time, the domain1 phase also complete and schedule extract phase to next to run. So the there two phase to printed.

for your second question, the run phase schedule extract phase and the domain1 phase schedule final phase and clean the pahse runining before the final so final phase run once.