KVM Rate Limit does not work with UDP

[Dzung]

KVM Rate Limit does not work with UDP, I limit 25MB but VM is still over 300MB, does anyone have a method to solve this problem ?
my server running pve-manager/6.4-6/be2fa32c (running kernel: 5.4.114-1-pve)

 

[spirit]

Hi, does it work for tcp ? (note that in the gui, it's in MB/s not Mbit/s)

 

[Dzung]

yes, it running on TCP, but UDP not working, I was limit 25MB but bandwidth out over 2400Mbps.(300MB)

 

[Dzung]

this is my pve version

proxmox-ve: 6.4-1 (running kernel: 5.4.114-1-pve)
pve-manager: 6.4-6 (running version: 6.4-6/be2fa32c)
pve-kernel-5.4: 6.4-2
pve-kernel-helper: 6.4-2
pve-kernel-5.4.114-1-pve: 5.4.114-1
pve-kernel-5.4.73-1-pve: 5.4.73-1
ceph-fuse: 14.2.20-pve1
corosync: 3.1.2-pve1
criu: 3.11-3
glusterfs-client: 5.5-3
ifupdown: residual config
ifupdown2: 3.0.0-1+pve3
ksm-control-daemon: 1.3-1
libjs-extjs: 6.0.1-10
libknet1: 1.20-pve1
libproxmox-acme-perl: 1.1.0
libproxmox-backup-qemu0: 1.0.3-1
libpve-access-control: 6.4-1
libpve-apiclient-perl: 3.1-3
libpve-common-perl: 6.4-3
libpve-guest-common-perl: 3.1-5
libpve-http-server-perl: 3.2-2
libpve-storage-perl: 6.4-1
libqb0: 1.0.5-1
libspice-server1: 0.14.2-4~pve6+1
lvm2: 2.03.02-pve4
lxc-pve: 4.0.6-2
lxcfs: 4.0.6-pve1
novnc-pve: 1.1.0-1
openvswitch-switch: 2.12.3-1
proxmox-backup-client: 1.1.6-2
proxmox-mini-journalreader: 1.1-1
proxmox-widget-toolkit: 2.5-5
pve-cluster: 6.4-1
pve-container: 3.3-5
pve-docs: 6.4-2
pve-edk2-firmware: 2.20200531-1
pve-firewall: 4.1-3
pve-firmware: 3.2-3
pve-ha-manager: 3.1-1
pve-i18n: 2.3-1
pve-qemu-kvm: 5.2.0-6
pve-xtermjs: 4.7.0-3
qemu-server: 6.4-2
smartmontools: 7.2-pve2
spiceterm: 3.1-1
vncterm: 1.6-2
zfsutils-linux: 2.0.4-pve1

 

[dcsapak]

can you post your vm config?
it worked here without problems (confirmed via iperf -u )

 

[Dzung]

this is my vm config. and attach bandwidth

#Client%3A Martun Fields (NateVPN)  (ID%3A 6552)
#Email%3A marfields@yahoo.com
#Service ID%3A 986
#Hostname%3A hostvm
#Main IP%3A 10.10.100.6
#Product%3A  VPS 01 (ID%3A 271)
agent: 1
bootdisk: virtio0
cipassword: $5$jW//qTmY$r7igFW0nMnAJ7D7nFd.3JhMfSUKCkHyBzQNnIouZUG9
ciuser: root
cores: 1
cpu: host,flags=+md-clear
ide0: data:vm-8092-cloudinit,media=cdrom,size=4M
ide2: none,media=cdrom
ipconfig0: ip=10.10.100.6/24,gw=10.10.100.1
kvm: 1
memory: 1024
name: host1623244366
nameserver: 8.8.8.8 8.8.4.4
net0: virtio=FA:75:A7:66:40:92,bridge=vmbr1,rate=25,tag=100
numa: 0
ostype: l26
scsihw: virtio-scsi-pci
serial0: socket
smbios1: uuid=2c90f469-a9b0-4066-80c1-eab01f32fa93
sockets: 1
vga: std
virtio0: data:vm-8092-disk-0,cache=none,format=raw,size=20G
vmgenid: fa9aff9a-09fa-4a77-8659-023174707460

 

[dcsapak]

ok, so what happens is that qemu counts the outgoing udp traffic (seemingly) but it does not arrive at the destination

in my iperf tests it looks like this:

server (outside the vm):

[ 5] 0.00-120.00 sec 590 MBytes 41.2 Mbits/sec 0.008 ms 9932128/10359075 (96%) receiver

client (inside vm)

[ 5] 0.00-120.00 sec 14.0 GBytes 1000 Mbits/sec 0.000 ms 0/10359108 (0%) sender
[ 5] 0.00-120.00 sec 590 MBytes 41.2 Mbits/sec 0.008 ms 9932128/10359075 (96%) receiver

 

[Dzung]

thank you