From: "Jürgen Groß" <jgross@suse.com>
To: tosher 1 <akm2tosher@yahoo.com>,
Xen-devel <xen-devel@lists.xenproject.org>
Subject: Re: Xen network domain performance for 10Gb NIC
Date: Mon, 27 Apr 2020 07:28:07 +0200 [thread overview]
Message-ID: <a06fdec5-9e9e-2319-e7f7-d68fdb48ffba@suse.com> (raw)
In-Reply-To: <1359850718.562651.1587928713792@mail.yahoo.com>
On 26.04.20 21:18, tosher 1 wrote:
> Hi everyone,
>
> Lately, I have been experimenting with 10Gb NIC performance on Xen domains. I have found that network performance is very poor for PV networking when a driver domain is used as a network backend.
>
> My experimental setup is I have two machines connected by the 10Gb network: a server running the Xen hypervisor and a desktop machine working as a client. I have Ubuntu 18.04.3 LTS running on the Dom0, Domus, Driver Domain, and client desktop, where the Xen version is 4.9. I measured the network bandwidth using iPerf3.
>
> The network bandwidth between a DomU using Dom0 as backend and the client desktop is like 9.39Gbits/sec. However, when I use a network driver domain, which has the 10Gb NIC by PCI pass through, the bandwidth between the DomU and the client desktop is like 2.41Gbit/sec is one direction and 4.48Gbits/sec in another direction. Here, by direction, I mean the client-server direction for iPerf3.
>
> These results indicate a huge performance degradation, which is unexpected. I am wondering if I am missing any key points here which I should have taken care of or if there is any tweak that I can apply.
Is the driver domain PV or HVM?
How many vcpus do dom0, the driver domain and the guest have?
Juergen
next prev parent reply other threads:[~2020-04-27 5:28 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1359850718.562651.1587928713792.ref@mail.yahoo.com>
2020-04-26 19:18 ` Xen network domain performance for 10Gb NIC tosher 1
2020-04-27 5:28 ` Jürgen Groß [this message]
2020-04-27 19:27 ` tosher 1
2020-04-27 7:03 ` Roger Pau Monné
2020-04-28 5:23 ` tosher 1
2020-04-28 7:07 ` Roger Pau Monné
2020-04-28 16:08 ` tosher 1
2020-04-28 16:21 ` Roger Pau Monné
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