Poor network performance - KVM Guest

G

g3ralt

Hi,

I'm facing a really annoying problem on Proxmox VE (Debian Jessie host). I have several VM - FreeBSD and Linux. On Linux based VMs network performance is good (90MB/s download) , on FreeBSD (latest 10.2 release, virtio) it's only ~10MB/s. So I'm assuming that the problem is on FreeBSD VM.

I've tried:

- disabling LRO and TSO support,
- TX checksum offload - on hypervisor and guest

sysctl.conf is default

Thanks in advance.
 
Last edited by a moderator:
Did you use benchmarks/iperf3 to evaluate the network performance?
Did you check the CPU usage on Linux and FreeBSD VM? You can use top -SHzP to check it.

By the way, on Ubuntu, LRO is disabled default, but GRO is enabled. What is about Debian? Does it enable GRO?
 
Last edited by a moderator:
Hello,

I've got exactly the same issue. I am using Proxmox 4 as a host. Two FresBSD guests have low network performance around 1,5MB/s when downloading a file. I have created two separated machines on Debian and Centos with the same settings and i am able to download the same file with download speed ~45MB/s

Now i am googling for similar issues however any recommendation is welcome.
 
You must log in or register to reply here.
Back
Top