Date: Wed, 18 May 2011 14:06:21 +0200 From: "laurent.cligny@gmail.com" <laurent.cligny@gmail.com> To: Michael MacLeod <mikemacleod@gmail.com> Cc: freebsd-xen@freebsd.org Subject: Re: [FreeBSD 8.2 amd64 XENHVM] DomU terrible network performance trought NAT Message-ID: <4DD3B63D.60205@gmail.com> In-Reply-To: <BANLkTin1Y%2B3NfJEMdWYVjEKDyyAemG%2B6mg@mail.gmail.com> References: <4DCBEEE0.9060705@steadinet.fr> <4DCBF681.7070106@ntelecom.com.br> <4DCC1097.4080003@gmail.com> <BANLkTin1Y%2B3NfJEMdWYVjEKDyyAemG%2B6mg@mail.gmail.com>
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Le 12/05/2011 19:36, Michael MacLeod a écrit : > Try -rxcsum as well. I have both disabled on my domU. I tried with -rxcsum as you mentionned, but unfortunately it changed nothing on the performance. > > On Thu, May 12, 2011 at 12:53 PM, laurent.cligny@gmail.com > <mailto:laurent.cligny@gmail.com> <laurent.cligny@gmail.com > <mailto:laurent.cligny@gmail.com>> wrote: > > Le 12/05/2011 17:02, Tobias P. Santos a écrit : > > Try this: > > > > ifconfig xn1 -txcsum > > > > Best regards, > > Tobias. > Hello Tobias, > > Unfortunately ifconfig xn1 -txcsum didn't give me lot of result. > Doing this my network perf through NAT is about 7KiB/s (that is better > than before, but still unworkable). > > Thanks for the idea, maybe we are not that far away from the solution. > > > > > > > Laurent Cligny wrote: > >> Hello all, > >> > >> I want to setup a FreeBSD DomU VM as a network NAT gateway in > order to > >> provide Internet access to other FreeBSD and Linux DomU VMs. > >> My Dom0 is Xen Cloud Platform 1.0 on a Dell Poweredge 210 with > 8 cores, > >> 16GiB RAM and one NIC. > >> > >> All FreeBSD VM are 8.2 amd64 with XENHVM kernel anf the Linux > VM is a > >> Paravirtualized Debian amd64. > >> > >> The NAT gateway is a two-NIC box, with one (xn0) configured with a > >> public Internet address and the other (xn1) configured with a > class A > >> private address (10.0.0.254). > >> The Internet traffic is very good from my FreeBSD NAT gateway > to the > >> Internet (~ 50MiB/s) and also between other VMs on the private > network > >> (~ 70MiB/s trough scp) after applying the patch here > >> (http://www.mail-archive.com/freebsd-xen@freebsd.org/msg00855.html) > >> fixing the "too many frags" problem. > >> > >> Here is a schema of my setup with the observed net speed on it: > >> > >> ---------- --------------- ---------------------- > >> |Internet|---xn0---|FBSD DomU NAT|---xn1---|FBSD and Linux DomUs| > >> ---------- --------------- ---------------------- > >> <-------> <-------> > >> 50MiB/s 70MiB/s > >> > >> <-------------------------------> > >> 0KiB/s <network speed< 5 KiB/s > >> > >> [...] > > _______________________________________________ > > freebsd-xen@freebsd.org <mailto:freebsd-xen@freebsd.org> mailing > list > > http://lists.freebsd.org/mailman/listinfo/freebsd-xen > > To unsubscribe, send any mail to > "freebsd-xen-unsubscribe@freebsd.org > <mailto:freebsd-xen-unsubscribe@freebsd.org>" > > _______________________________________________ > freebsd-xen@freebsd.org <mailto:freebsd-xen@freebsd.org> mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-xen > To unsubscribe, send any mail to > "freebsd-xen-unsubscribe@freebsd.org > <mailto:freebsd-xen-unsubscribe@freebsd.org>" > >
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