Date: Tue, 2 Jan 2018 20:11:03 +0100 From: Michael Grimm <trashcan@ellael.org> To: freebsd-net@freebsd.org Cc: bryanv@FreeBSD.org Subject: Re: [SOLVED] performance issue within VNET jail Message-ID: <53C901D3-FA1B-49E7-8623-7FE23493B7E8@ellael.org> In-Reply-To: <5FD6CE98-601B-46B7-B598-83BE5A31200A@ellael.org> References: <4F5EE3F6-0163-4435-8726-56B0D4AE9FAF@ellael.org> <B6446660-9FD2-4C28-A3A2-8AC99624C7FF@sigsegv.be> <8102F5FD-DCFC-4EF8-A443-9E6C9EB1F467@ellael.org> <DB5DE737-7171-4953-AF98-45F1BE7AF09E@sigsegv.be> <8C8A172B-4D4F-4066-8B94-EF5F59E2D345@ellael.org> <5A3D67EC.6010907@grosbein.net> <53687746-C487-4712-AA52-DE86CE70FDEF@ellael.org> <AD46E22E-8230-47FD-A14D-FDA9E0753746@lists.zabbadoz.net> <5FD6CE98-601B-46B7-B598-83BE5A31200A@ellael.org>
next in thread | previous in thread | raw e-mail | index | archive | help
Hi, let me come back to this issue I did report end of last year: = https://lists.freebsd.org/pipermail/freebsd-net/2017-December/049470.html My setup: vtnet/pf-NAT <=E2=80=94> epairXa (bridge0) epairXb <-> vnet jail My observations regarding a sample download like "wget = https://download.freebsd.org/ftp/releases/ISO-IMAGES/11.1/FreeBSD-11.1-REL= EASE-amd64-bootonly.iso -O /dev/null" (-) expected performance at the host of about 30 MB/s (-) dramatic loss of performance inside a vnet jail down to = about 80 KB/s My solution: adding 'hw.vtnet.lro_disable=3D"1"' to /boot/loader.conf In the meantime I did find a comparable reference regarding Linux:=20 "Previously, network drivers that had Large Receive Offload = (LRO) enabled by default caused the system to run slow,=20 lose frame, and eventually prevent communication, when using = software bridging. With this update, LRO is automatically=20 disabled by the kernel on systems with a bridged configuration, = thus preventing this bug." https://bugzilla.redhat.com/show_bug.cgi?id=3D772317 I do not have the knowledge to judge if that should be disabled in = FreeBSD as well when software bridging is involved, thus I just want to = let you know.=20 (And that's the reason that I have included the author of the vnet = driver in CC.) With kind regards, Michael=
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?53C901D3-FA1B-49E7-8623-7FE23493B7E8>