49.1.4 Queues

The nam trace queue states is given by:
q -t time -s src -d dst -a attr
Queues are visualized in nam as a straight line along which packets (small squares) are packed. In queue trace events, the flag -a specifies the orientation of the line of the queue (angle between the queue line and the horizontal line, counter-clockwise). For example, the following line specifies a queue that grows vertically upwards with respect to the screen (here 0.5 means the angle of the queue line is pi/2):

q -t * -s 0 -d 1 -a 0.5