Date: Tue, 8 Nov 2022 09:59:00 +0100 From: Lutz Donnerhacke <lutz@donnerhacke.de> To: Chris Ross <cross+freebsd@distal.com> Cc: freebsd-net@freebsd.org Subject: Re: Lagg and multi-gigabit questions/proablems Message-ID: <20221108085900.GA21023@belenus.iks-jena.de> In-Reply-To: <76E0E023-AB86-453A-B95C-AED44E7ADA2D@distal.com> References: <76E0E023-AB86-453A-B95C-AED44E7ADA2D@distal.com>
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On Tue, Nov 08, 2022 at 12:38:54AM -0500, Chris Ross wrote: > Tl;dr; I have two FreeBSD systems attached to a Cisco switch, there should be multi-gigabit connectivity, but only seeing 1Gpbs. Each system is trunked, vlan interfaces on the underlying interface. I can add another data point: - stable trains in 12/13 - 10g ixl cards (with 1G and 10G ports) - without LACP cpu load correlates linearly with the throughput - with LACP cpu load rise sharply to 100% at about 40-50% input bandwidth - if this happens, the packet drop rate spikes to about 10 kp/s in the kernel input handling queues, throughput falls to some Mbps Unfortunately I did not have time to digg deeper, bringing the production network back to work had priority. (The BSD machines in question work as cantral Carrier Grade NAT devices.)
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