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From: Chegu Vinod <chegu_vinod@hp.com>
To: kvm@vger.kernel.org
Subject: Networking performance on a KVM Host (with no guests)
Date: Thu, 19 Apr 2012 03:53:39 +0000 (UTC)	[thread overview]
Message-ID: <loom.20120419T053941-656@post.gmane.org> (raw)


Hello,

Perhaps this query was answered in the past. If yes kindly point me to 
the same.

We noticed differences in networking performance (measured via netperf 
over a 10G  NIC) on an X86_64 server between the following two 
configurations :

1) Server run as a KVM Host (but with no KVM guests created on it (or) no 
extra  bridges created other than the default vibr0 bridge)  

vs. 

2) The same server running the same version of Linux but without any of the 
virtualization software installed on it. 

Config #2 performed much better ! 
Is this expected ? What are the reasons behind this ? 

Is there any way to gain back the loss in performance on the KVM host 
without having to uninstall the virtualization software (i.e. in Config 1).

Thanks!
Vinod





             reply	other threads:[~2012-04-19  3:53 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-04-19  3:53 Chegu Vinod [this message]
2012-04-19  5:43 ` Networking performance on a KVM Host (with no guests) Gleb Natapov
2012-04-19  6:42   ` Jean-Philippe Menil
2012-04-20 14:15   ` Chegu Vinod
2012-04-20 19:35     ` Nadav Har'El
2012-04-21  0:30       ` Chegu Vinod
2012-04-22 11:09         ` Nadav Har'El

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