If you modify your code to print the system time that each $display message gets executed, you will see that the forked child processes do not get killed, they still get executed
e.g.
module exm();
task example_task();
#5 $display("Before fork join %0t", $time);
fork
#10 $display("inside fork %0t", $time);
#15 $display("still inside fork %0t", $time);
join_none
endtask
initial begin
$timeformat(-9, 2, " ns", 20);
example_task();
end
endmodule
results in the following output:
# Before fork join 5.00 ns
# inside fork 15.00 ns
# still inside fork 20.00 ns
# exit
Adding the #5 in the 2nd example has no impact on the $display statements.
