How does forever behaves in fork block

In reply to dave_59:
With the above syntax i tried it could stucked at run_phase itself. so i tried with the below syntax.

task run_phase
                begin
                   fork
                     begin
                         test1();
                     end
                     begin
                         test2();
                     end
                     join
                  end
                  endtask : run_phase
                  task test1();
                     begin
                        forever @(posedge clk);
                         begin
                            fork
                               begin
                                 @(posedge intf.c1);
                                  uvm_info("p1",uvm_low)
                                end
                                begin
                                 @(posedge intf.c2);
                                  uvm_info("p2",uvm_low)
                                end 
                                 join_none
                            end
                        end
                     endtask 
                     task test2();
                     begin
                        forever @(posedge clk1);
                         begin
                            fork
                               begin
                                 @(posedge intf.c6);
                                  uvm_info("p6",uvm_low)
                                end
                                begin
                                 @(posedge intf.c7);
                                  uvm_info("p7",uvm_low)
                                end 
                                 join_none
                            end
                        end
                     endtask

I need to check c1,c2,c6,c7 until case to be done so i kept fork in raise, drop objections.
The clk,clk1 are of high speed. When the c1,c2,c6,c7 are hit first time at the same time stamp p1,p2,p6,p7 prints are coming continuously.