Re: [lwip-users] Windows 7 Startup crashes LwIP and Free RTOS

[Marco Jakobs]

Hi,

thanks David for the detailed explanation. But also interesting, as my 
system communicates (at the moment) with only 3 other devices 
permanently at least every 200ms (So these MACs are well known all the 
time). It will send back to the PC after establishing the Telnet access 
(i.e. for querying the LwIP stats), so this may be another query.

There is really a lot of broadcast and multicast packets in the network 
during the Win7 startup - as i only can see the point where my watchdog 
task detects the system not running anymore, there is a ~8 sec window 
where it may happen. I saw nothing really special in the wireshark 
traces at crash time (but i may post the trace here if someone is 
interested).

I'm struggling again a bit as the LwIP_stats are showing nothing special 
at crash time, no overflows etc. Maybe LwIP was not able to record what 
happens into its stats before it crashes. I'll post the stats after a 
night of running the system and after a PC start this morning. As you 
can see in the log at the bottom, one of my RTU devices crashed during 
the win7 startup at 7:12:33, but not the CPU device from where i pulled 
the stats. So the CPU got all the X-cast packets at the startup and they 
must be in the stats.

As a next step i've disabled IPv6 at my PC (there are a bunch auf IPv6 
X-casts at startup and i did not see this with XP) to see if this is the 
problem (what will LwIP do with IPv6 casts?). I may try to catch the 
system to a breakpoint with the JTAG when it happens, but i need some 
advice what i have to check then ...

BTW: What is the "memerr" count in the LwIP stats in "Link", "IP", "TCP" 
etc... ?


>ipstats

--- IP stack statistics output ---

MEM UDP_PCB
        avail: 64
        used: 3
        max: 5
        err: 0

MEM TCP_PCB
        avail: 32
        used: 1
        max: 1
        err: 0

MEM TCP_PCB_LISTEN
        avail: 32
        used: 3
        max: 3
        err: 0

MEM TCP_SEG
        avail: 16
        used: 1
        max: 3
        err: 0

MEM NETBUF
        avail: 16
        used: 0
        max: 3
        err: 0

MEM NETCONN
        avail: 16
        used: 7
        max: 8
        err: 0

MEM TCPIP_MSG_API
        avail: 8
        used: 0
        max: 0
        err: 0

MEM TCPIP_MSG_INPKT
        avail: 8
        used: 0
        max: 6
        err: 0

MEM ARP_QUEUE
        avail: 8
        used: 0
        max: 2
        err: 0

MEM SYS_TIMEOUT
        avail: 6
        used: 2
        max: 2
        err: 0

MEM PBUF_REF/ROM
        avail: 16
        used: 0
        max: 1
        err: 0

MEM PBUF_POOL
        avail: 64
        used: 0
        max: 33
        err: 0

LINK
        xmit: 26807
        recv: 33069
        fw: 0
        drop: 0
        chkerr: 0
        lenerr: 0
        memerr: 0
        rterr: 0
        proterr: 0
        opterr: 0
        err: 0
        cachehit: 0

ETHARP
        xmit: 8
        recv: 2784
        fw: 0
        drop: 0
        chkerr: 0
        lenerr: 0
        memerr: 0
        rterr: 0
        proterr: 0
        opterr: 0
        err: 0
        cachehit: 17972

IP
        xmit: 26752
        recv: 29162
        fw: 0
        drop: 85
        chkerr: 0
        lenerr: 57
        memerr: 0
        rterr: 1
        proterr: 0
        opterr: 0
        err: 0
        cachehit: 0

ICMP
        xmit: 0
        recv: 0
        fw: 0
        drop: 0
        chkerr: 0
        lenerr: 0
        memerr: 0
        rterr: 0
        proterr: 0
        opterr: 0
        err: 0
        cachehit: 0

UDP
        xmit: 26647
        recv: 18910
        fw: 0
        drop: 0
        chkerr: 0
        lenerr: 0
        memerr: 0
        rterr: 1
        proterr: 0
        opterr: 0
        err: 0
        cachehit: 46

TCP
        xmit: 106
        recv: 111
        fw: 0
        drop: 0
        chkerr: 0
        lenerr: 0
        memerr: 11
        rterr: 0
        proterr: 0
        opterr: 0
        err: 0
        cachehit: 0

MEM HEAP
        avail: 8192
        used: 952
        max: 1436
        err: 0

SYS
        sem.used: 0
        sem.max:  0
        sem.err:  0
        mbox.used: 0
        mbox.max:  0
        mbox.err:  0


OK.

>plog
OK.

--------------- Protocol logger output started
07.07.10 23:00:38   Protocol logger cleared.
07.07.10 23:01:38   Telnet session ended.
08.07.10 07:12:33   IOU 2 is OFFLINE.
08.07.10 07:12:47   IOU 2 @ 192.168.2.11: RESET occured.
08.07.10 07:12:47   IOU 2 @ 192.168.2.11: Comm TIMEOUT occured, I/O were 
set to default.
08.07.10 07:12:48   IOU 2 is online.
08.07.10 09:53:48   Telnet login by marco.
--------------- Protocol logger output ended