From: Gregory Maxwell <greg@linuxpower.cx>
To: lartc@vger.kernel.org
Subject: Re: [LARTC] How to measure jitter & packet loss?
Date: Sun, 25 Mar 2001 06:59:25 +0000 [thread overview]
Message-ID: <marc-lartc-98550359908154@msgid-missing> (raw)
In-Reply-To: <marc-lartc-98549430031544@msgid-missing>
On Sun, Mar 25, 2001 at 12:33:20PM +0800, Rick Goh wrote:
> Inter-packet gaps if too big may cause real-time application to have
> jitters. But how do i measure the jitter if supposedly i send out a tcp/udp
> stream??
>
> Attached is an extract of tcpdump data.
>
> Any information on how to post-analyse tcpdump for jitter, packet loss is
> very very much appreciated.
The text format isn't very useful for me. :) Tcpdump binary would be much
better.
What I normally do is a binary capture set to only grab the flows I'm
interested in (i.e. no spurious arp activity like your dump), then I run the
binary output back through tcpdump with it set to delta time mode once for
each flow with the right filters to isolate the flow.
Then I can import the resulting data into R (a freesoftware statistics
package) where I can see and analyze the delay characterize of the flow.
It's also useful to gather the same data on the transmit side and see how
the statistics differ.
_______________________________________________
LARTC mailing list / LARTC@mailman.ds9a.nl
http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://ds9a.nl/2.4Routing/
prev parent reply other threads:[~2001-03-25 6:59 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-03-25 4:33 [LARTC] How to measure jitter & packet loss? Rick Goh
2001-03-25 6:59 ` Gregory Maxwell [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=marc-lartc-98550359908154@msgid-missing \
--to=greg@linuxpower.cx \
--cc=lartc@vger.kernel.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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox