From: tosher 1 <akm2tosher@yahoo.com>
To: Xen-devel <xen-devel@lists.xenproject.org>
Subject: Xen network domain performance for 10Gb NIC
Date: Sun, 26 Apr 2020 19:18:33 +0000 (UTC) [thread overview]
Message-ID: <1359850718.562651.1587928713792@mail.yahoo.com> (raw)
In-Reply-To: 1359850718.562651.1587928713792.ref@mail.yahoo.com
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.
Thanks,
Mehrab
next parent reply other threads:[~2020-04-26 19:19 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 ` tosher 1 [this message]
2020-04-27 5:28 ` Xen network domain performance for 10Gb NIC Jürgen Groß
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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