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] vif interface dropping 80% packets

To: "Reese Faucette" <reese@xxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject: RE: [Xen-devel] vif interface dropping 80% packets
From: "Ian Pratt" <m+Ian.Pratt@xxxxxxxxxxxx>
Date: Tue, 6 Feb 2007 23:06:40 -0000
Delivery-date: Tue, 06 Feb 2007 15:06:53 -0800
Envelope-to: www-data@xxxxxxxxxxxxxxxxxx
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: <086c01c74986$0e8fd120$58c31fac@bart><08CA2245AFCF444DB3AC415E47CC40AF71781F@xxxxxxxxxxxxxxxxxxxxxxxxxxxx><007101c74a20$cf49d600$58c31fac@bart><08CA2245AFCF444DB3AC415E47CC40AF71789E@xxxxxxxxxxxxxxxxxxxxxxxxxxxx> <00b901c74a41$86ba3b70$58c31fac@bart>
Sender: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
Thread-index: AcdKQcafac7MFnIvR7udNR+Gy4y2LwAARfYw
Thread-topic: [Xen-devel] vif interface dropping 80% packets
> update:
> MTU=9000 does work, I had failed to set one of the vif interfaces -
plenty
> of interfaces to change ;-)
> The performance is better with 9k MTU, as expected:
> TCP_STREAM and TCP_SENDFILE both get ~1.8Gb/s, xentop reports 87%
> utilization for dom0, so I guess that's about all I can expect without
code
> changes.

I've seen rather better figures than this with another 10G card.

Does your NIC/driver support TSO and LRO?

> before I spend a lot of time converting to 3.0.4, a couple of
questions:
> 1) any reason to expect better perf on 3.0.4 ?

Yes, there were changes in the RX path.

> 2) if yes, Will the patch "fedora-36252.patch" work on the 2.6.16
kernel
> included with 3.0.4, or have conflicts crept in?

No idea. What does the patch do?

Ian

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel