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Subject: Re: tcp/ip falling over
From: Ian A Smith <ias@roe.ac.uk>
To: Maren Purves <m.purves@jach.hawaii.edu>
Cc: tech-talk@aps.anl.gov
Date: Wed, 21 Jun 2006 09:13:10 +0100
Hi,

sorry, I should have said, the ioc is alive and "well" via the console. No application activity is active, so how it can overflow a buffer isn't obvious.

Thanks

Ian

Maren Purves wrote:
Ian,

you say there are no messages sent to the serial console, but
is the serial console (or the IOC itself) dead or alive?
- And if this consistently happens after 5 minutes it looks
like a buffer overflow somewhere. -

Maren

On Wed, 21 Jun 2006, Ian A Smith wrote:

Hi,

I have a crate whose networking consistently falls over after 5 minutes. There are no messages sent to the serial consol and I can't even ping the crate after it happens.

I have reduced the application to a very simple startup file:

hostAdd "scuba232", "195.194.120.210"
value = 0 = 0x0

ld < /sw3/jac_sw/epics/jacR3.13.8/bin/ppc604_long/tnetDev
value = 518154048 = 0x1ee26740 = tnetDevClose + 0x928

tnetDevCreate("/pty/ls218_2",  "scuba232", 2104)
value = 518140392 = 0x1ee231e8
tnetDevCreate("/pty/ls218_1",  "scuba232", 2103)
value = 518121632 = 0x1ee1e8a0

If there is only 1 /pty device then the fault does not appear. It also doesn't seem to matter which terminal connection is made, as long as there are 2 or more of them. All of the created consol connections work until the networking falls over.

The crate details are:

VxWorks version 5.4.2
KERNEL: WIND version 2.5
CPU: Motorola MVME5110-2263 - MPC 7410.  Processor #0.
Memory Size: 0x20000000.  BSP version 1.2/1.


Any suggestions appreciated.





--
Ian A Smith               Telephone: +44 (0) 131 668 8255
Royal Observatory         Fax:       +44 (0) 131 668 8314
Blackford Hill            Web:       http://www.roe.ac.uk/
Edinburgh
EH9 3HJ
UK



References:
tcp/ip falling over Ian A Smith
Re: tcp/ip falling over Maren Purves

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