ping reply stops after some time

[Joel Sherrill]

peter.o.mueller at gmx.de wrote:
> 
> Hi,
> 
> I have just finished to get our new 68332 hardware up and running (at
> least partly). We use rtems (one of the latest snapshots) together with the
> cs8900 driver from Chris Johns. Everythings looks fine so far.
> 
> After a fresh download (via bdm) my target replies to ping several
> times, but after some time (e.g. 6 pings) there was no reply from my
> target anymore. The target is still alive and I can break and debug it
> using bdm. Looking on the network statistics (see below) shows that sill
> ping requests (and lots of other stuff, becaus there is some network
> traffic) are received, but the figures on the transmitter stand still.
> 
> I have no idea where to start debugging. My feeling is that the
> transmitter task has stopped working, but I do not really know.
> 
> Can someone give me hints how to start debugging?

Some random things to look at ...

  + too many interrupts masked on the chip
  + not returning resources (TX?)
  + "wrapping" some HW list/queue (i.e. 1st n work but n+1
    trips a wrap boundary
  + Is the RX daemon waking up ?

More than likely given > 4K interrupts, you have run out of something.
Check frees and reclamation code. :)
 
> Thank you very much,
> Peter
> 
> The following shows the statistics screen after there is no reply to
> pings:
> 
> ************ UDP Statistics ************
>                 total input packets           6
>      of above, arrived as broadcast           6
> 
> ************ TCP Statistics ************
> 
> Destination     Gateway/Mask/Hw    Flags     Refs     Use Expire
> Interface
> default         138.222.94.1       UGS         0        0      0 cs0
> 138.222.94.0    255.255.255.0      U           0        0      1 cs0
> 138.222.94.1                       UHL         1        0      1 cs0
> 138.222.94.27   00:10:4B:B2:04:78  UHL         0       69   1261 cs0
> ************ MBUF STATISTICS ************
> mbufs: 512    clusters:  64    free:   0
> drops:   0       waits:   0  drains:   0
>       free:425           data:87          header:0           socket:0
>        pcb:0           rtable:0           htable:0           atable:0
>     soname:0           soopts:0           ftable:0           rights:0
>     ifaddr:0          control:0          oobdata:0
> 
> ************ INTERFACE STATISTICS ************
> ***** cs0 *****
> Address:138.222.94.66   Broadcast Address:138.222.94.255
> Flags: Up Broadcast Running Active Simplex
> Send queue limit:50   length:22   Dropped:0
> Network Driver Stats for CS8900 :
>         rx ready len -         42        rx loaded len -          0
>           rx packets -       3802           tx packets -         52
>             rx bytes -     447003             tx bytes -       4946
>        rx interrupts -       4556        tx interrupts -         51
>           rx dropped -        377           rx no mbuf -          0
>        rx no custers -       1259   rx oversize errors -          0
>        rx crc errors -          0       rx runt errors -          0
>     rx missed errors -        475                tx ok -         51
>        tx collisions -          0        tx bid errors -          0
>   tx wait for rdy4tx -          0            tx rdy4tx -          0
>   tx underrun errors -          0           tx dropped -          0
>           tx resends -          0        int swint req -         11
>        int swint res -         11           int lockup -          0
>           interrupts -       2586
> 
> ************ IP Statistics ************
>              total packets received        2340
>   packets rcvd for unreachable dest        2265
>  datagrams delivered to upper level          75
>     total ip packets generated here          69
> 
> ************ ICMP Statistics ************
>                         Type 0 sent          69
>                 number of responses          69
>                     Type 8 received          69
> 
> --
> Sent through GMX FreeMail - http://www.gmx.net

-- 
Joel Sherrill, Ph.D.             Director of Research & Development
joel at OARcorp.com                 On-Line Applications Research
Ask me about RTEMS: a free RTOS  Huntsville AL 35805
Support Available                (256) 722-9985