digraph {
	rankdir="LR";
	bgcolor="transparent";

	worker1[label="worker"];
	worker2[label="worker"];
	mgr[label="manager"];
	sock[label="transport socket"];
	server[label="web server"];

	mgr -> worker1[label="spawn (3)"; style="dashed"];
	mgr -> worker2[label="spawn (2)"; style="dashed"];
	mgr -> sock[label="accept (1)"; style="dashed"];
	server -> sock[label="FastCGI (4)"];
	sock -> mgr[label="FastCGI (5)"];
	mgr -> worker1[label="sendmsg (6)"; style="dashed"];
	mgr -> worker2[label="sendmsg (7)"; style="dashed"];
	sock -> worker1[label="FastCGI (8)"];
	sock -> worker2[label="FastCGI (9)"];
}