9fans - fans of the OS Plan 9 from Bell Labs
 help / color / mirror / Atom feed
From: "ron minnich" <rminnich@gmail.com>
To: "Fans of the OS Plan 9 from Bell Labs" <9fans@cse.psu.edu>
Subject: Re: [9fans] snoopy oddity
Date: Tue, 23 Jan 2007 11:14:50 -0700	[thread overview]
Message-ID: <13426df10701231014j6bf33568nc2ca0fb5179f6ee4@mail.gmail.com> (raw)
In-Reply-To: <15b23f02d7799ffd243fcc875f0df93c@coraid.com>

On 1/22/07, erik quanstrom <quanstro@coraid.com> wrote:
> doesn't the size of the snoopy queue need to be somewhat
> proportional to the speed of the connection?  a gigabit connection, for eaxmple, could overrun
> QMAX in 520µs.

yes, but, in the end, if you can't keep up, you can't keep up. You can
redirect into a file, but, if the file system is slow (which is it on
Plan 9), then you sooner or later can't keep up. Tuning the queue will
only let you hold off the day of reckoning, in the hopes that your
traffic is bursty.

If you could grab a raw disk partition, and have a way to just dump
the raw packets on it, that might be your best shot.

ron


      reply	other threads:[~2007-01-23 18:14 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-01-22 16:23 erik quanstrom
2007-01-22 16:54 ` Russ Cox
2007-01-22 18:34   ` erik quanstrom
2007-01-22 21:28     ` Russ Cox
2007-01-22 22:06       ` erik quanstrom
2007-01-23 18:14         ` ron minnich [this message]

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=13426df10701231014j6bf33568nc2ca0fb5179f6ee4@mail.gmail.com \
    --to=rminnich@gmail.com \
    --cc=9fans@cse.psu.edu \
    /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 NNTP newsgroup(s).