Date: Wed, 29 Jul 2015 14:28:16 +0200 From: Egoitz Aurrekoetxea <egoitz@sarenet.es> To: Karl Pielorz <kpielorz_lst@tdx.co.uk> Cc: xen@FreeBSD.org Subject: Re: Poor network performance with Xen + OpenVPN? Message-ID: <40E060AB-F0B9-48F3-9309-947CAB5C1939@sarenet.es> In-Reply-To: <B314E8002A8A1A7A537DB661@Karls-Mac-mini.local> References: <B314E8002A8A1A7A537DB661@Karls-Mac-mini.local>
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Hi! Have you disabled tso, lro and friends?. Regards, Egoitz Aurrekoetxea Departamento de sistemas 944 209 470 Parque Tecnológico. Edificio 103 48170 Zamudio (Bizkaia) egoitz@sarenet.es <mailto:egoitz@sarenet.es> www.sarenet.es <http://www.sarenet.es/>; Antes de imprimir este correo electrónico piense si es necesario hacerlo. > El 29/7/2015, a las 8:47, Karl Pielorz <kpielorz_lst@tdx.co.uk> escribió: > > > Hi All, > > A while ago I ran into an issue with FreeBSD + Xen and networking (where FreeBSD PVHVM domU's can't "route" traffic to/from other domU's (fbsd/linux/windows) - e.g. as a default gateway). > > I seem to have run into what appears to be another network issue now - XenServer 6.5-SP1 +hotfixes, with FreeBSD 10.1-p4 (as PVHVM), and OpenVPN 2.3.7 > > Everything 'works OK' - but the performance is pretty poor. Most noticeable - if you have a browser open fetching pages via the VPN - the pages arrive very slowly, and any ssh sessions etc. are instantly put on a 'go slow', you also start getting ping timeouts when pinging hosts the other side of the VM/VPN until the pages are fetched. > > Swap back to a bare metal system (on the same networks) - it works fine, switch back over to the VM - and again, performance is lousy. > > The host running OpenVPN isn't really under any load (it's only job is running OpenVPN) - nor is it's XenServer. > > If I connect to another OpenVPN host which is running on an HVM FreeBSD 9.1 domU - performance is indistinguishable from the bare metal (as you'd expect considering the relatively low volumes of traffic over the VPN etc.) > > Can anyone suggest any fixes / where to look to try and keep it as PVHVM, and get the performance back? - as we've already got a collection of HVM machines (to work round the other network problem) - which I don't really want to add to, as they're not agile :( > > Cheers, > > -Karl > _______________________________________________ > 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"
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