WARNING - OLD ARCHIVES

This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
   
 
 
Xen 
 
Home Products Support Community News
 
   
 

xen-devel

Re: [Xen-devel] n/w performance degradation

To: Ian Pratt <m+Ian.Pratt@xxxxxxxxxxxx>
Subject: Re: [Xen-devel] n/w performance degradation
From: Diwaker Gupta <diwaker.lists@xxxxxxxxx>
Date: Mon, 5 Dec 2005 18:07:16 -0800
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
Delivery-date: Tue, 06 Dec 2005 02:07:38 +0000
Domainkey-signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=DXlRakzD6vAtTqGpA8oWgdDXN5U4R5nQL74jHXlpMHD2uuAzRRS/c+9PLMGL3HyTULocxz7rsSS2rpUeZrbLAobqlGsiiJkOjAzMY8cRJJurRPcnQn8yOcxJu9LXerLFmI5Fcb5V+geXblU5Wpsqslys9Ag7HXmQ5d228nnidh0=
Envelope-to: www-data@xxxxxxxxxxxxxxxxxxx
In-reply-to: <A95E2296287EAD4EB592B5DEEFCE0E9D409B78@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
List-help: <mailto:xen-devel-request@lists.xensource.com?subject=help>
List-id: Xen developer discussion <xen-devel.lists.xensource.com>
List-post: <mailto:xen-devel@lists.xensource.com>
List-subscribe: <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
References: <A95E2296287EAD4EB592B5DEEFCE0E9D409B78@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
Sender: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
> Ah, I expect I know what's going on here.
>
> Linux sizes the default socket buffer size based on how much 'system'
> memory it has.

Yes it does. But I've managed to saturate gigabit links from my VMs
with the _exact_ same configuration earlier, hence my original email.

> For a gigabit network you need at least 128KB.

These are extremely low latency networks, so the requirements might
actually be lower than this.

Diwaker
--
Web/Blog/Gallery: http://floatingsun.net
_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel