The task responsible for requesting a wait_for_grant on sequencer for sequence has been killed, to avoid a deadlock the sequence will be removed from the arbitration queues

UVM
,
1

UVM_ERROR *********/uvm-1.2/src/seq/uvm_sequencer_base.svh(757) @ 0: uvm_test_top.env.agt.seqr [SEQREQZMB] The task responsible for requesting a wait_for_grant on sequencer ‘uvm_test_top.env.agt.seqr’ for sequence ‘uvm_test_top.env.agt.seqr.axi_master_random_sequence’ has been killed, to avoid a deadlock the sequence will be removed from the arbitration queues.
**
How to solve this error???
Below is my simple sequence.


class axi_master_random_sequence extends uvm_sequence #(axi_master_sequence_item);

`uvm_object_utils(axi_master_random_sequence)
function new(string name = "axi_master_random_sequence");
  super.new(name);
endfunction

virtual task body();
super.body();
repeat (10) begin
`uvm_do(req);
end

endtask
endclass

Below is my run_phase of the driver class


task run_phase(uvm_phase phase);
  forever begin
   seq_item_port.get_next_item(req);
   drive_to_dut(req);
   seq_item_port.item_done();
   end
endtask

Also i have the sequencer declared in Agent class.


typedef uvm_sequencer #(axi_master_sequence_item) axi_master_sequencer;

Please give me some inputs to solve this error??

**
Thanks,
Siva**

2

This error is telling you that your sequence was terminated while it was waiting for the sequencer to grant it permission to send an item. You will have to look at how your sequence is being started and if there is something that doesn’t allow the sequence to terminate properly.