For loop inside fork join_none

[dave_59]

A fork/join inside a for loop executes serially. Use a wait fork; statement after the loop.

[rag123]

@MadhanM

module tb;
    initial begin
     for( int i =0; i<3 ; i++) begin
      automatic int k =i;
      fork begin
        $write ("%d ", k);
      end
      join_none
     end
    end
endmodule

Hi @dave_59, why is this code printing the output 0,1,2 . There is no blocking statement to kick off the fork join_none…

[dave_59]

Section 9.3.2 Parallel blocks

In all cases, processes spawned by a fork-join block shall not start executing until the parent process is blocked or terminates.

[rag123]

Exactly, by that time it comes out of the for loop, the simulation ends. So curious, what kicks of the write to get displayed?

[dave_59]

Simulation ends when there is nothing scheduled left to do, or a call to $finish/$fatal

[rag123]

Yes, but then what triggers the fork join_none to execute in this case since the parent process is not blocked or terminated yet?