All of lore.kernel.org
 help / color / mirror / Atom feed
From: John Cagle <jcagle@kernel.org>
To: linuxppc-embedded@lists.linuxppc.org
Subject: 405GP network receive problem
Date: Fri, 29 Jun 2001 10:46:18 -0700	[thread overview]
Message-ID: <20010629104618.A22541@kernel.org> (raw)
In-Reply-To: <Pine.LNX.3.95.1010627084008.2380C-100000@november.bhjjh.erols.com>; from ghurwitz@dyndns.com on Wed, Jun 27, 2001 at 08:43:16AM -0400


I am debugging a custom board design based on the 405GP and have a problem
receiving lots of TCP/IP traffic (like FTP).  We're using a 2.4 kernel based
on Monta Vista's CDK 1.2.  UDP traffic (like TFTP) works very well, but it
doesn't ever have back-to-back receives, typically.  The problem occurs
at both 10mbit and 100Mbit.

I have narrowed the problem down (using ttcp) to the following:

During back-to-back receives (within microseconds) of two large (1500 bytes)
TCP packets, the second packet is usually dropped by the 405GP.  When I
check ifconfig statistics, it shows the 1 lost packet, but also shows 2
framing errors.

Has anyone else seen this type of problem with the 405GP or does anyone
know what the problem might be?

Thanks,
John
------------------------------
John Cagle <jcagle@kernel.org>

** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/

  reply	other threads:[~2001-06-29 17:46 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2001-06-27 12:43 Proper way to flush caches Justin (Gus) Hurwitz
2001-06-29 17:46 ` John Cagle [this message]
2001-06-29 18:57   ` 405GP network receive problem Armin Kuster
2001-07-04 18:52   ` Raymond Lo
  -- strict thread matches above, loose matches on Subject: below --
2001-07-04 20:31 Marti, Felix

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=20010629104618.A22541@kernel.org \
    --to=jcagle@kernel.org \
    --cc=linuxppc-embedded@lists.linuxppc.org \
    /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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.