Re: Networking under Xen

2015-07-19 Thread George Neville-Neil
On 15 Jul 2015, at 3:54, Colin Percival wrote: On 07/15/15 00:44, Kristof Provost wrote: On 14 Jul 2015, at 21:23, Mark Felder wrote: On Tue, Jul 14, 2015, at 13:54, Colin Percival wrote: More precisely *pf* is a known issue. It's inserting TCP checksums into TSO packets. I reported this

Re: Networking under Xen

2015-07-19 Thread Kristof Provost
> On 19 Jul 2015, at 17:58, George Neville-Neil wrote: > Since Kristof is already working on this, I'll let him address it. If > necessary > open a PR on this specifically please. It’s on my todo list, but I’d like to take another run at PR 172648 first. Regards, Kristof _

Re: Networking under Xen

2015-07-19 Thread George Neville-Neil
On 19 Jul 2015, at 12:14, Kristof Provost wrote: On 19 Jul 2015, at 17:58, George Neville-Neil wrote: Since Kristof is already working on this, I'll let him address it. If necessary open a PR on this specifically please. It’s on my todo list, but I’d like to take another run at PR 17264

Re: Networking under Xen

2015-07-19 Thread Sydney Meyer
Also i have noticed, when TSO is disabled IPv4 TCP Performance also drops from ~10 Gb/s to ~3 Gb/s, the same as with IPv6. I have read threads from around 2010 about the networking stack not having support for TSO on IPv6 Packets. May this be the problem in this case? > On 14 Jul 2015, at 23:44