linux-kernel - how to optimize virtio-vhost in 10G net

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:	Sun, 15 Feb 2015 15:30:27 +0800
From:	Ding Xiao <ssdxiaoding@...il.com>
To:	linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Subject: how to optimize virtio-vhost in 10G net

I am test virtio-vhost in 10G environment

host info
cpu E2680@...GHz
memory 16G
network intel 82599BE
os centos 7

VM info
cpu 4
memory 4G
network using virtio vhost
os centos 7

I using pktgen to send udp package, the result like follow
64b 230Mb/s
1400b 5.9Gb/s

I test the speed in VMware too, the result like follow
64b 700Mb/s
1400 9.3Gb/s

I am very surprised why the speed with virtio-vhost is slow
so I test to analysis this by using perf tool
I found the tun_sendmsg occupancy rate of 35%
tun_sendmsg using copy_from_user to get the data from VM
Perhaps mapping could improve the performance ?
or other Another improvement method ?
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/