为什么p_sequencer不指定具体的sequencer也可以调用sequence

sages

1. class base_vseqr extends ovm_virtual_sequencer;
   
2.    X_seqr X_seqr_h;
   
3.    Y_seqr Y_seqr_h;
   
4. 
   
5.   `ovm_sequencer_utils(base_vseqr)
   
6.    .....
   
7. endclass
   
8. 
   
9. class A_seq extends ovm_sequence;
   
10.   B_seq B_seq_h;
    
11.   `ovm_create_on(B_seq_h, p_sequencer);
    
12.   B_seq_h.start(p_sequencer);
    
13. endclass
    

复制代码

这样的话，没有指定p_sequencer具体的sequencer，如何调度B_seq_h呢？

A1985

------>>>> `ovm_sequencer_utils(base_vseqr)