DDPSTAT(8C) — MAINTENANCE COMMANDS

NAME

ddpstat − display DDP interface statistics

SYNOPSIS

ddpstat [ −m seconds ]

DESCRIPTION

Ddpstat displays the set of statistics counters maintained by the AppleTalk Datagram Delivery Protocol interface. Ddpstat with no arguments prints the numbers once and exits. The −m N option causes ddpstat to produce and periodically update a screen display showing the counter values. The number N is the display refresh period in seconds.

Here is a sample display:

AppleTalk Statistics Counters
         calls to ddpintr = 118339
        times through ddpintr= 118401
         short dds received = 67433
        rtmps received = 67191
         length too short = 0
        length too long = 0
        null interface = 0
        packet not for this net = 2
        packets forwarded = 0
        packet with no ddpcb = 43
        packets rejected by socket = 12
        bad exit from ddpintr = 57

These counter values are concerned with DDP packet reception. Ddpintr refers to the DDP interrupt routine which is called once for each DDP packet received. Rtmp here stands for Routing Table Maintenance Protocol packet. Ddpcb means DDP control block. Packet rejected by socket means that a (UNIX) socket receive buffer didn’t have enough space to accommodate the incoming packet.

FILES

/dev/mem

EXAMPLE

To display the statistics once a second:

ddpstat -m 1

Sun Release 4.0 — Last change: 23 November 1987