Date: Tue, 14 Jul 2015 11:15:26 -0500 From: Mark Felder <feld@FreeBSD.org> To: freebsd-xen@freebsd.org Cc: gnn@freebsd.org Subject: Re: Networking under Xen Message-ID: <1436890526.3162974.323521249.6B73E6E2@webmail.messagingengine.com> In-Reply-To: <4E7B7075-4E0D-4EA7-9F5D-6D252CFBD487@gmail.com> References: <4E7B7075-4E0D-4EA7-9F5D-6D252CFBD487@gmail.com>
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On Tue, Jul 14, 2015, at 07:36, Sydney Meyer wrote: > Hello everybody, > > i have noticed some odd behaviour with networking under Xen with FreeBSD > 10 as a DomU. > > - IPv6 (TCP) bandwith drops from ~10 Gbit/s IPv4 to around 3 Gbit/s IPv6. > (measured with iperf) > What is the "before" and "after" here? When is FreeBSD successfully doing 10Gbit/s and when isn't it? Is pf enabled? Are you scrubbing? > - Dropped/Stalled Connections with TCP Segmentation Offload and pf > enabled. > TSO is a known issue. I've been turning it off for years to get FreeBSD to play nice on Xen. > - IPSEC-enabled Kernel TCP Performance drops from ~10 Gbit/s to ~200 > Mbit/s (iperf). > Are you saying FreeBSD non-IPSEC kernel can do 10Gbit/s TCP performance, but IPSEC kernel immediately drops it to 200Mbit/s?
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