Milan Holzäpfel
2007-Oct-29 07:32 UTC
[Xen-devel] TSO doesn''t work for domU (because of routing?)
Hello, large file transfers via TCP from a Xen domU were horribly slow, as the domU tried to send packets larger than the MTU, which were probably discarded. I got back to normal speed be issueing | ethtool eth0 -K tso off on the domU. I believe that the dom0 of that machine successfully does TSO, as I see many packets three our four times the size of the line MTU going out with tcpdump dump. All my xen virtual networks are routed. Is domU TSO supposed to work in a routed environment? If not, should it be disabled automatically? Xen version is Xen-3.1.1. Kernel version is 2.6.22.9-0.4 from OpenSUSE-10.3. Regards, Milan -- Milan Holzaepfel <mail(a)mjh(d)name> <URL:http://mjh.name/> pub 4096R/C790FC23 EB8E 5E81 81E3 53A9 9B74 B895 5179 54C0 C790 FC23 _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
Milan Holzäpfel
2007-Nov-09 22:58 UTC
Re: [Xen-devel] TSO doesn''t work for domU (because of routing?)
On Mon, 29 Oct 2007 08:32:19 +0100 Milan Holzäpfel <listen@mjh.name> wrote:> [...] > All my xen virtual networks are routed. Is domU TSO supposed to work > in a routed environment? If not, should it be disabled automatically? > > Xen version is Xen-3.1.1. Kernel version is 2.6.22.9-0.4 from > OpenSUSE-10.3.Is there actually any information on this? Am I asking on the wrong ML or did I miss sth else important? Regards, Milan -- Milan Holzaepfel <mail(a)mjh(d)name> <URL:http://mjh.name/> pub 4096R/C790FC23 EB8E 5E81 81E3 53A9 9B74 B895 5179 54C0 C790 FC23 _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel