slow network with Ubuntu guest
Posted: 11. Mar 2017, 15:24
I've been trying to troubleshoot and determine root cause for network performance issues with my Asustor NAS Virtualbox host for quite a few weeks now, and I can't seem to get anywhere. Asustor has confirmed they have reproduced my issue, but they've asked me to contact Virtualbox since they have no idea what the problem is.
In a nutshell, my Linux VM is exhibiting network performance issues in one direction. I've been testing throughput using iperf3 from multiple sources and have also patched directly (no router/switch) to my NAS to do the testing, but there's no changes in behavior. My linux guest can run iperf3 at close to line speeds as a client, but reverse the direction, and it piddles down to 200-300Mbps. All my other iperf3 sources are able to do ~940Mbps consistently between each other, including the ADM host OS. If I run iperf3 between the host and guest, I get over 1.5Gbps (seems slow).
I've tried fiddling with the network adapter type, as well as the paravirtualization interface, but nothing seems to help. Linux guest is fully updated via apt-get. Anyone have any thoughts?
FWIW, before this morning, I was running Virtualbox 4.3.36. Found out Asustor had a NAS OS upgrade and Virtualbox upgrade, so I gave 5.1.14 a shot. Same network performance issue on Virtualbox 4.3.36 as well.
Linux Host:
*Asustor AS5104T: J1900 quadcore Celeron w/8GB RAM
*Asustor ADM2.7.0RF72 OS w/Linux 4.4.24 #1 SMP Tue Mar 7 03:17:37 CST 2017 x86_64
*Virtualbox 5.1.14
Linux Guest (only one):
*Ubuntu 16.04.2 LTS w/Linux 4.4.0-66-generic #87-Ubuntu SMP Fri Mar 3 15:29:05 UTC 2017 x86_64
*2vCPU + 2GB RAM
*Virtualbox Guest Additions 5.0.32
Some virt info from the guest:
In a nutshell, my Linux VM is exhibiting network performance issues in one direction. I've been testing throughput using iperf3 from multiple sources and have also patched directly (no router/switch) to my NAS to do the testing, but there's no changes in behavior. My linux guest can run iperf3 at close to line speeds as a client, but reverse the direction, and it piddles down to 200-300Mbps. All my other iperf3 sources are able to do ~940Mbps consistently between each other, including the ADM host OS. If I run iperf3 between the host and guest, I get over 1.5Gbps (seems slow).
I've tried fiddling with the network adapter type, as well as the paravirtualization interface, but nothing seems to help. Linux guest is fully updated via apt-get. Anyone have any thoughts?
Code: Select all
root@feeble:~# iperf3 -c loopy2 -t 5
Connecting to host loopy2, port 5201
[ 4] local 10.4.2.22 port 40420 connected to 10.4.2.11 port 5201
[ ID] Interval Transfer Bandwidth Retr Cwnd
[ 4] 0.00-1.00 sec 110 MBytes 918 Mbits/sec 0 215 KBytes
[ 4] 1.00-2.00 sec 108 MBytes 905 Mbits/sec 0 215 KBytes
[ 4] 2.00-3.00 sec 106 MBytes 893 Mbits/sec 0 215 KBytes
[ 4] 3.00-4.00 sec 106 MBytes 889 Mbits/sec 0 215 KBytes
[ 4] 4.00-5.00 sec 109 MBytes 916 Mbits/sec 0 215 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bandwidth Retr
[ 4] 0.00-5.00 sec 539 MBytes 904 Mbits/sec 0 sender
[ 4] 0.00-5.00 sec 538 MBytes 902 Mbits/sec receiver
iperf Done.
root@feeble:~# iperf3 -c loopy2 -t 5 -R
Connecting to host loopy2, port 5201
Reverse mode, remote host loopy2 is sending
[ 4] local 10.4.2.22 port 40424 connected to 10.4.2.11 port 5201
[ ID] Interval Transfer Bandwidth
[ 4] 0.00-1.00 sec 42.7 MBytes 358 Mbits/sec
[ 4] 1.00-2.00 sec 40.8 MBytes 343 Mbits/sec
[ 4] 2.00-3.00 sec 41.6 MBytes 349 Mbits/sec
[ 4] 3.00-4.00 sec 41.2 MBytes 345 Mbits/sec
[ 4] 4.00-5.00 sec 42.4 MBytes 356 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bandwidth
[ 4] 0.00-5.00 sec 209 MBytes 350 Mbits/sec sender
[ 4] 0.00-5.00 sec 209 MBytes 350 Mbits/sec receiver
iperf Done.Linux Host:
*Asustor AS5104T: J1900 quadcore Celeron w/8GB RAM
*Asustor ADM2.7.0RF72 OS w/Linux 4.4.24 #1 SMP Tue Mar 7 03:17:37 CST 2017 x86_64
*Virtualbox 5.1.14
Linux Guest (only one):
*Ubuntu 16.04.2 LTS w/Linux 4.4.0-66-generic #87-Ubuntu SMP Fri Mar 3 15:29:05 UTC 2017 x86_64
*2vCPU + 2GB RAM
*Virtualbox Guest Additions 5.0.32
VBox.log- Linux VM VBox Log
- (64.88 KiB) Downloaded 8 times
Code: Select all
root@feeble:~# dmesg | grep -i virt
[ 0.000000] DMI: innotek GmbH VirtualBox/VirtualBox, BIOS VirtualBox 12/01/2006
[ 0.000000] CPU MTRRs all blank - virtualized system.
[ 0.000000] Booting paravirtualized kernel on KVM
[ 0.549126] KVM setup paravirtual spinlock
[ 1.915396] virtio-pci 0000:00:03.0: virtio_pci: leaving for legacy driver
[ 2.276507] virtio_net virtio0 enp0s3: renamed from eth0
[ 9.676482] systemd[1]: Detected virtualization oracle.
root@feeble:~# dpkg -l | grep virtualbox
ii virtualbox-guest-dkms 5.0.32-dfsg-0ubuntu1.16.04.2 all x86 virtualization solution - guest addition module source for dkms
ii virtualbox-guest-utils 5.0.32-dfsg-0ubuntu1.16.04.2 amd64 x86 virtualization solution - non-X11 guest utilities
ii virtualbox-guest-x11 5.0.32-dfsg-0ubuntu1.16.04.2 amd64 x86 virtualization solution - X11 guest utilities