Performance issues with networking and veth devices can be often linked to the implementation of hardware acceleration in various kernel drivers for various NICs. I found this from a lot of toggling of the acceleration tunables with ethtool. I'm sure there's a deeper issue with the drivers, but it was just a trial and error discovery on my part.
-- Matt Bailey 303.871.4923 Senior Software Specialist University of Denver, UTS http://du.edu http://system42.net On Fri, May 28, 2010 at 3:12 AM, Daniel Lezcano <daniel.lezc...@free.fr> wrote: > On 05/28/2010 02:58 AM, Toby Corkindale wrote: >> >> On 28/05/10 05:55, Matt Bailey wrote: >>> >>> /usr/sbin/ethtool -K br0 sg off >>> /usr/sbin/ethtool -K br0 tso off >>> >>> Might fix your problem, YMMV; this worked for me. >> >> Bam! Problem fixed. >> All I needed was the 'sg' option - tso wasn't enabled anyway. >> >> Now getting a healthy 15-16 mbyte/sec. > > Great ! > >> Thanks for that.. >> >> Is this a bug in a driver somewhere that I should, or just something one >> always needs to be aware of with LXC? (and thus should go in a FAQ) > > The true is the first time I see this problem solved by this trick. I > suppose that has something related to the capabilities of your nic and the > bridge inherit them. Dunno ... > > Matt, > > how did you find that ? Is it a problem spotted with the other > virtualization solution (xen, vmware, qemu, openvz, ...) ? Do you have some > pointer describing the problem/solution ? So we can add a FAQ with a good > description / diagnostic of the problem. > > Thanks > -- Daniel > > ------------------------------------------------------------------------------ _______________________________________________ Lxc-users mailing list Lxc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/lxc-users
