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-users

Re: [Xen-users] Slow networking problem in dom0

To: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-users] Slow networking problem in dom0
From: Emil Christopher Melar <typeof@xxxxxxxxx>
Date: Sat, 14 May 2011 19:03:39 +0200
Delivery-date: Sat, 14 May 2011 10:05:23 -0700
Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:in-reply-to:references:date :message-id:subject:from:to:content-type; bh=sQLGlR94/obQ/qRITaQXaAmpuU8JdAcyDryBOO565eE=; b=MGykD8XB1Y/oOplbq8M05VCbhGnXJ5x/G7EmcHNhAT4TuDKgjPmtKScQDCQ+YuINCH 3CsMUYBK/Ynoz0HonlhXVf3qot3iehysA0dnDWTnQhWRUOMiDdaNJNMq9UspErWrwbZU YzGN3gO2vhA7ZGtOIGtlbUXuwYvV8l9HIwoxg=
Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; b=oCUowTkVxISU7mXAmFOAFpLfN8VNIalCh9GcWtLdFEG6/tiTqB3+Sj/s2Km0+HdaEk xTeWXu7PaMmUh3KGZs/xUl0oAv+l+QmYwdjethlXl8zinyllkTdExAZ3PdY31zpPCAEQ F8LramfHqYZGaXG4rlH9pibgm5mK1P1zT/GIo=
Envelope-to: www-data@xxxxxxxxxxxxxxxxxxx
In-reply-to: <BANLkTi=gQXEVp3=GSbGQob_T=SHF5hKapw@xxxxxxxxxxxxxx>
List-help: <mailto:xen-users-request@lists.xensource.com?subject=help>
List-id: Xen user discussion <xen-users.lists.xensource.com>
List-post: <mailto:xen-users@lists.xensource.com>
List-subscribe: <http://lists.xensource.com/mailman/listinfo/xen-users>, <mailto:xen-users-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/mailman/listinfo/xen-users>, <mailto:xen-users-request@lists.xensource.com?subject=unsubscribe>
References: <BANLkTik3PC7QUBHn2RnnqJ7-A+KXfO+efw@xxxxxxxxxxxxxx> <4DBAD565.1020304@xxxxxxxxxxxxxx> <BANLkTinUx2JzwqdBnx=ie6HX01JN+pNBmQ@xxxxxxxxxxxxxx> <BANLkTikj_12tk3J=7GNfTX0yUvb22D9pTA@xxxxxxxxxxxxxx> <4DCEA444.8050306@xxxxxxxxxxx> <BANLkTikF0Djy5xXYsstmuYqVaSGr7sge0A@xxxxxxxxxxxxxx> <4DCEAA63.7090102@xxxxxxxxxxx> <BANLkTi=B17MpO_X6TdPWWe9FrA=A-NVBLg@xxxxxxxxxxxxxx> <BANLkTi=gQXEVp3=GSbGQob_T=SHF5hKapw@xxxxxxxxxxxxxx>
Sender: xen-users-bounces@xxxxxxxxxxxxxxxxxxx
Yes. I noticed the same thing. I can do without IPV6. Maybe there's bridge problem around this!
Do you know by any chance if I can disable IPv6 without booting in Ubuntu 10.10?

Thanks!

On Sat, May 14, 2011 at 6:54 PM, Joel Witherspoon <joel.witherspoon@xxxxxxxxx> wrote:
So,
You're running IPv6 and IPv4 on the same interface? Can you do without IPv6?


My profiles: LinkedIn Twitter
Twitter Latest tweet: For the Nintendo and Twitter lovers out there: The Fail Blooper. http://www.cubeecraft.com/blog/fail-blooper/
  Get this email app!  


On Sat, May 14, 2011 at 9:49 AM, Emil Christopher Melar <typeof@xxxxxxxxx> wrote:
On Sat, May 14, 2011 at 6:14 PM, Erwan RENIER <erwan.renier@xxxxxxxxxxx> wrote:
> Did you try tcpdump  allready to examine it with wireshark, to see i there
> are problems with the flows ( like retransmitted paquets ) , i had this
> problem on virtualbox that maid the network very slow.

My bridge setup is pretty standard. Speed is OK right after boot. But
over time (hours) it drops to 500-600 k/sec. My setup is stated in the
first post.
tcpdump didn't work:

> Another option is to not bridge but route the network, at least to see if it
> works.
> Also did you check your stats on the interfaces and on the bridge for errors
> ?

tcpdump doesn't say anything unusual when it comes to ICMP at least.
Any suggestions to what to test on?
I did  sudo tcpdump -nnvvi xen-pub  icmp[0] = 8 or icmp[0] = 30.
I am clueless on what to test :-)

I can't change the network configuration as I am only on remote right
now. I just want to know if there's anything inherently wrong with my
kernel and / or bridge configuration.

> can you post the result of : ifconfig -a on the host.
> Is there any relevant logs ( dmesg ).
> Thanks.

eth0      Link encap:Ethernet  HWaddr 00:1b:21:8d:b1:27
         inet6 addr: fe80::21b:21ff:fe8d:b127/64 Scope:Link
         UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
         RX packets:69748631 errors:0 dropped:22 overruns:0 frame:0
         TX packets:20460331 errors:0 dropped:0 overruns:0 carrier:0
         collisions:0 txqueuelen:1000
         RX bytes:87875949926 (87.8 GB)  TX bytes:21764017480 (21.7 GB)

eth1      Link encap:Ethernet  HWaddr bc:ae:c5:de:97:0d
         BROADCAST MULTICAST  MTU:1500  Metric:1
         RX packets:0 errors:0 dropped:0 overruns:0 frame:0
         TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
         collisions:0 txqueuelen:1000
         RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
         Interrupt:18

lo        Link encap:Local Loopback
         inet addr:127.0.0.1  Mask:255.0.0.0
         inet6 addr: ::1/128 Scope:Host
         UP LOOPBACK RUNNING  MTU:16436  Metric:1
         RX packets:9862 errors:0 dropped:0 overruns:0 frame:0
         TX packets:9862 errors:0 dropped:0 overruns:0 carrier:0
         collisions:0 txqueuelen:0
         RX bytes:705262 (705.2 KB)  TX bytes:705262 (705.2 KB)

sit0      Link encap:IPv6-in-IPv4
         NOARP  MTU:1480  Metric:1
         RX packets:0 errors:0 dropped:0 overruns:0 frame:0
         TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
         collisions:0 txqueuelen:0
         RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

vif4.0    Link encap:Ethernet  HWaddr fe:ff:ff:ff:ff:ff
         inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link
         UP BROADCAST RUNNING PROMISC MULTICAST  MTU:1500  Metric:1
         RX packets:59827 errors:0 dropped:0 overruns:0 frame:0
         TX packets:700342 errors:0 dropped:6 overruns:0 carrier:0
         collisions:0 txqueuelen:32
         RX bytes:11462334 (11.4 MB)  TX bytes:618194259 (618.1 MB)

virbr0    Link encap:Ethernet  HWaddr aa:5e:2e:b3:28:32
         inet addr:192.168.122.1  Bcast:192.168.122.255  Mask:255.255.255.0
         inet6 addr: fe80::a85e:2eff:feb3:2832/64 Scope:Link
         UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
         RX packets:0 errors:0 dropped:0 overruns:0 frame:0
         TX packets:26 errors:0 dropped:0 overruns:0 carrier:0
         collisions:0 txqueuelen:0
         RX bytes:0 (0.0 B)  TX bytes:1628 (1.6 KB)

xen-dmz   Link encap:Ethernet  HWaddr 5a:d4:56:b2:a8:17
         inet6 addr: fe80::58d4:56ff:feb2:a817/64 Scope:Link
         UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
         RX packets:0 errors:0 dropped:0 overruns:0 frame:0
         TX packets:6 errors:0 dropped:0 overruns:0 carrier:0
         collisions:0 txqueuelen:0
         RX bytes:0 (0.0 B)  TX bytes:468 (468.0 B)

xen-intern Link encap:Ethernet  HWaddr 02:99:ff:50:7b:22
         inet6 addr: fe80::99:ffff:fe50:7b22/64 Scope:Link
         UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
         RX packets:0 errors:0 dropped:0 overruns:0 frame:0
         TX packets:6 errors:0 dropped:0 overruns:0 carrier:0
         collisions:0 txqueuelen:0
         RX bytes:0 (0.0 B)  TX bytes:468 (468.0 B)

xen-pub   Link encap:Ethernet  HWaddr 00:1b:21:8d:b1:27
         inet addr:192.168.0.3  Bcast:192.168.0.255  Mask:255.255.255.0
         inet6 addr: fe80::21b:21ff:fe8d:b127/64 Scope:Link
         UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
         RX packets:68302724 errors:0 dropped:0 overruns:0 frame:0
         TX packets:18407729 errors:0 dropped:0 overruns:0 carrier:0
         collisions:0 txqueuelen:0
         RX bytes:86617595475 (86.6 GB)  TX bytes:22462523015 (22.4 GB)


Thanks!
--
Emil Christopher Solli Melar

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




--
Emil Christopher Solli Melar
_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users