From: Andrew Lunn <andrew@lunn.ch>
To: Rick Davis <rickdavisjr@comcast.net>
Cc: ecos-discuss@ecos.sourceware.org
Subject: Re: [ECOS] network problem
Date: Mon, 27 Aug 2007 08:12:00 -0000 [thread overview]
Message-ID: <20070827081225.GZ31057@lunn.ch> (raw)
In-Reply-To: <003601c7e876$4e9ee690$ebdcb3b0$@net>
On Mon, Aug 27, 2007 at 02:48:42AM -0400, Rick Davis wrote:
> I have a device using the MPC859T processor that has a small web server
> running using the standard eCos web server. I have a status page that
> auto-refreshes every 15 seconds and I am pinging the unit every second (Yes,
> I have a customer that is actually doing this). I don't really know what
> other network activity is occurring at the customer's site but my test lab
> has Windows network chatter going on. After about 12 or so hours the web
> stops responding and the unit can no longer be pinged. The FEC Ethernet
> driver is receiving packets and is calling the eth_drv_dsr but the deliver
> function is never called.
>
> I have been tracking this down for some time and have noticed the
> following...
>
> 1. The alarm thread in timeout.c is getting blocked when calling
> splx_internal() just before the call to eth_drv_run_deliveries().
> 2. The current value of spl_state in sync.c is 4 (SPL_NET)
>
> Any ideas why the network would not release the splx_mutex?
> Any suggestion on how to further track this down?
> I don't have a GDB interface on my platform. :(
What vintage of eCos are you using? If you go back far enough into the
mists of time, there was at least one bug fix for alarms. But that is
a long time ago.
Do you have asserts enabled? It might give some clues.....
You could also enable CYGIMPL_TRACE_SPLX and call show_sched_events()
when you hit the deadlock. That should tell you what function is
holding the mutex. You might want to add to the log structure
__builtin_return_addresss(0), so you can see one more level up the
call stack. Otherwise i think you will just get spi_slpnet, which is
not much use.
Andrew
--
Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos
and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss
next prev parent reply other threads:[~2007-08-27 8:12 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-08-27 6:48 Rick Davis
2007-08-27 8:12 ` Andrew Lunn [this message]
2007-08-28 9:00 ` Rick Davis
2007-08-28 16:09 ` Andrew Lunn
2007-08-28 16:29 ` Rick Davis
2007-08-28 18:10 ` John Mills
2007-08-28 18:42 ` Rick Davis
2007-08-29 19:12 ` John Mills
2007-08-28 18:42 ` John Mills
2007-09-01 10:38 ` Andrew Lunn
2007-09-01 12:05 ` Rick Davis
2007-09-01 12:32 ` Andrew Lunn
-- strict thread matches above, loose matches on Subject: below --
2007-08-30 23:09 Rick Davis
2005-05-14 19:55 [ECOS] : Network problem vamshi
2005-05-16 5:13 ` Gary Thomas
2002-01-11 8:30 [ECOS] network problem Andrea Acquaviva
2002-01-11 8:40 ` Andrew Lunn
2002-01-11 9:04 ` Andrea Acquaviva
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20070827081225.GZ31057@lunn.ch \
--to=andrew@lunn.ch \
--cc=ecos-discuss@ecos.sourceware.org \
--cc=rickdavisjr@comcast.net \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).