use app_start_time for initial DC offset calculation because app_time might be overwritten while calculating the offsets.
/* $Id$ */
digraph pdo_entry_read {
start [fontname="Helvetica"]
start -> count [weight=5]
count [fontname="Helvetica"]
count -> action_next [weight=5]
action_next [shape=point,label=""]
action_next -> pdo_entry [fontname="Helvetica", label="Next entry", weight=5]
action_next -> end [fontname="Helvetica", label="No more entries"]
pdo_entry [fontname="Helvetica"]
pdo_entry -> action_next
end [fontname="Helvetica"]
}