From: "George Hadjichristofi" <gh@winlab.rutgers.edu>
To: user-mode-linux-devel@lists.sourceforge.net
Cc: 'shruti singhal' <shruti20@gmail.com>
Subject: [uml-devel] UDP vs. TCP performance over UML
Date: Tue, 12 Jun 2007 07:01:05 -0400 [thread overview]
Message-ID: <010701c7ace0$f98b0d80$d8c8a8c0@angel4> (raw)
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Dear All,
We are doing some UML performance testing and we are getting some
non-sensible UDP statistics.
We have deployed the following network of two nodes:
A--------B
Node A is connected to node B via a wired link (100 Mbps) and node A is
running one UML instance.
We used the Iperf traffic generator to execute performance measurements for
both TCP and UDP.
Measurements:
When we use TCP the throughput is 100 Mbps from the UML instance of node A
to the host kernel of node B and 100 Mbps from the host kernel of node A to
the host kernel of node B. However, when we use UDP the throughput is only
26 Mbps from the UML instance on node A to the host kernel of node B, but
100 Mbps from the host kernel of node A to the host kernel of node B. We
also notice that a large number of packets were dropped in the case of UDP
over UML.
What is the reason that UDP throughput is so much lower than TCP?
Why are packets being dropped given that Iperf is blocking?
We appreciate any guidance on this matter.
Regards,
George Hadjichristofi
WINLAB, Rutgers University
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next reply other threads:[~2007-06-12 11:01 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-06-12 11:01 George Hadjichristofi [this message]
2007-06-12 15:04 ` [uml-devel] UDP vs. TCP performance over UML Jeff Dike
2007-06-13 0:32 ` George Hadjichristofi
2007-06-13 1:24 ` Jeff Dike
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