Date: Mon, 19 Feb 2018 10:42:08 +0000 From: Laurence Pawling <laurence.pawling@globalsign.com> To: =?utf-8?B?Um9nZXIgUGF1IE1vbm7DqQ==?= <roger.pau@citrix.com> Cc: "freebsd-xen@freebsd.org" <freebsd-xen@freebsd.org>, "freebsd-virtualization@freebsd.org" <freebsd-virtualization@freebsd.org>, "freebsd-net@freebsd.org" <freebsd-net@freebsd.org>, David King <david.king@globalsign.com>, Vlad Galu <vlad.galu@globalsign.com> Subject: Re: multi-vCPU networking issues as client OS under Xen Message-ID: <D19A161B-A26C-4CB8-8CF8-45A1195433C7@globalsign.com> In-Reply-To: <20180219100558.adgb6m5ukdfvxehp@MacBook-Pro-de-Roger.local> References: <D1AF75E7-49F9-4628-8B26-3ACB64994C97@globalsign.com> <20180219100558.adgb6m5ukdfvxehp@MacBook-Pro-de-Roger.local>
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--B_3601881728_1046608566 Content-type: text/plain; charset="UTF-8" Content-transfer-encoding: 7bit > When using >1 vCPUs can you set hw.xn.num_queues=1 on > /boot/loader.conf and try to reproduce the issue? > > I'm afraid this is rather related to multiqueue (which is only used > if >1 vCPUs). > > Thanks, Roger. Roger - thanks for your quick reply, this is confirmed. Setting hw.xn.num_queues=1 on the server VM when vCPUs > 1 prevents the issue. For reference, please can you comment on the performance impact of this? 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