Use fork join_none inside loop with behaviour of fork join

SystemVerilog
, , ,
1 
module tb;
  int temp[2];
  initial begin
    for (int i = 0; i < 2; i++) begin
      temp[i] = i;
      fork
        print(temp[i]); 
      join_none
  #1;
    end
  end
endmodule

function void print(int a);
  $display("a=%0d", a);
endfunction

Actually this code works fine.But i want same output without using #1; after join_none.

1 Like
2

if we try with out delay , the value will be same because threads are in race-around condition

1 Like
3

The problem here is with the #1 delay, each iteration of the for loop executes with a different value of the iterator variable i. When the delay is removed, all iterations are sharing the same loop iterator variable whose value is two by the time the print statement gets executed. See For loop inside fork join_none - #13 by dave_59

4

Hi @dave_59 , this is not the solution, I am looking for! I don’t want to use automatic keyword here. Just use that array and get the output as 0,1.

5 
module tb;
  int temp[2];
  initial begin
    fork
    for (int i=0;i<2;i++)begin
      temp[i]=i;
      print(temp[i]); end
    join_none
   
  end
endmodule
function void print(int a);
  $display("a=%0d",a);
endfunction

what about this?

6

What about it?

This example behaves the same if you were to remove the fork/join_none keywords. The calls to print() happen serially in a single process.