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] Xen cluster n/w performance (again!)

To: Keir Fraser <keir.fraser@xxxxxxxxxxxx>
Subject: Re: [Xen-devel] Xen cluster n/w performance (again!)
From: Diwaker Gupta <diwakergupta@xxxxxxxxx>
Date: Tue, 23 Nov 2004 13:32:59 -0800
Cc: xen-devel@xxxxxxxxxxxxxxxxxxxxx
Delivery-date: Tue, 23 Nov 2004 21:37:45 +0000
Domainkey-signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:reply-to:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:references; b=bkuF5zFVLVs2xb5Cn0AMUO5hSsATsTg0BHmLcCMu8KUxlUikEDXY+My7YWuzg71euu+7YerQbgynbP5SLyPYyZmh00CkUll9IwUDEXbJwoBwTBL+zHphob3tKETOj5a8j92ItmyRxX07m99fIFBKTBWEsWCR9tq5DifuPoQhnlo=
Envelope-to: xen+James.Bulpin@xxxxxxxxxxxx
In-reply-to: <E1CVy2F-0005du-00@xxxxxxxxxxxxxxxxx>
List-archive: <http://sourceforge.net/mailarchive/forum.php?forum=xen-devel>
List-help: <mailto:xen-devel-request@lists.sourceforge.net?subject=help>
List-id: List for Xen developers <xen-devel.lists.sourceforge.net>
List-post: <mailto:xen-devel@lists.sourceforge.net>
List-subscribe: <https://lists.sourceforge.net/lists/listinfo/xen-devel>, <mailto:xen-devel-request@lists.sourceforge.net?subject=subscribe>
List-unsubscribe: <https://lists.sourceforge.net/lists/listinfo/xen-devel>, <mailto:xen-devel-request@lists.sourceforge.net?subject=unsubscribe>
References: <E1CVpKh-0006kx-00@xxxxxxxxxxxxxxxxx> <E1CVy2F-0005du-00@xxxxxxxxxxxxxxxxx>
Reply-to: Diwaker Gupta <diwakergupta@xxxxxxxxx>
Sender: xen-devel-admin@xxxxxxxxxxxxxxxxxxxxx
> One thing you might want to try is to change a line in the file
> linux-2.6.9-xenU/drivers/xen/netfront/netfront.c.
> From:
> #define RX_MIN_TARGET 8
> To:
> #define RX_MIN_TARGET NETIF_RX_RING_SIZE
> 
> One possibility is that dynamic buffer sizing is dropping some packets
> and causing TCP to crap itself.
> 
> If this improves things then I'll have to be much more careful about
> shrinking the buffers, and/or add a config option to disable the
> resizing completely.
> 
>  -- Keir
> 

My bad.

Sorry about the false alarm everyone, it was a routing issue. With the
correct routing setup, I can see upto 930 Mbps between VMs running on
2 distinct physical machines in the cluster.

Cheers!

-- 
Diwaker Gupta
http://resolute.ucsd.edu/diwaker


-------------------------------------------------------
SF email is sponsored by - The IT Product Guide
Read honest & candid reviews on hundreds of IT Products from real users.
Discover which products truly live up to the hype. Start reading now. 
http://productguide.itmanagersjournal.com/
_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxxxx
https://lists.sourceforge.net/lists/listinfo/xen-devel