Best performance settings for vps video transcoding

[openaspace]

Hello I need to take advantage of several machines for video transcoding using Windows VPS. I noticed that the number of frames per second processed are half of a non-virtual system, although there are no others virtual machines running on the mains hosts.

Wich settings I can use to obtain performances near the real hardware?
Setting the cpu to "host" and increase the cpu time setting? The vps are set to use all the available cores and with 12gb of RAM.

Thank you.

 

[dcsapak]

please post your vm config and the output of pveversion -v

 

[openaspace]

Really thank you.



proxmox-ve: 6.2-1 (running kernel: 5.4.41-1-pve)
pve-manager: 6.2-4 (running version: 6.2-4/9824574a)
pve-kernel-5.4: 6.2-2
pve-kernel-helper: 6.2-2

 

[dcsapak]

ok, looks ok, what hardware runs this on?
does the software transcode via software or gpu-accelerated hardware?
if it uses the gpu, this will not work with virtual gpus, but you could passthrough a real one

 

[openaspace]

ok, looks ok, what hardware runs this on?

Quad-core Intel® Xeon® processors 3400 series
RAM 16GB 1333MHz
zfs Raid 10 Sata Enterprise 15k rpm

The transcoding use only the CPU

 

[openaspace]

The same happen on another server with:

Intel Core i7-4770
4x HDD SATA 2,0 TB Enterprise
4x RAM 8192 MB DDR3

 

[dcsapak]

mhmm.. can you post the complete vm config? (qm config ID)

 

[openaspace]

mhmm.. can you post the complete vm config? (qm config ID)

agent: 1,fstrim_cloned_disks=1

balloon: 0

bootdisk: ide0

cores: 8

cpu: host

cpuunits: 4000

description: virtio1%3A px.mydomain.com_2_TB%3A101/vm-101-disk-0.raw,backup=0,cache=writeback,iothread=1,size=50G

hotplug: disk,network,usb,memory,cpu

ide0: local-lvm:vm-100-disk-0,cache=writeback,replicate=0,size=80G

ide1: px.mydomain.com:100/vm-100-disk-0.raw,backup=0,cache=writeback,replicate=0,size=300G

memory: 12288

name: windows10

net0: e1000=DA:95:85:1A:3E:70,bridge=vmbr0,queues=8

net1: e1000=FE:FB:C2:AD:1C:94,bridge=vmbr1,queues=8

numa: 1

ostype: win10

scsihw: virtio-scsi-single

smbios1: uuid=714ad584-2f86-4190-a09b-956898953617

sockets: 1

vga: virtio,memory=256

vmgenid: 95b6fe8c-0809-40e1-ac5d-db61cb70bae6

 

[openaspace]

Using instead a Ubuntu vps for the same transcoding , it reach real performance of the host with medium of 35fps/s, with windows 10 ..not.

qm config 105
agent: 1
balloon: 2000
bootdisk: virtio0
cores: 8
cpu: host
cpuunits: 5000
memory: 5024
name: Lubuntu
net0: virtio=E2:4A:D9:75:F4:3B,bridge=vmbr0,queues=8
numa: 1
ostype: l26
scsihw: virtio-scsi-pci
smbios1: uuid=4b1351cc-9b09-4058-95ea-b5be65647194
sockets: 1
vga: virtio
virtio0: px.mydomain.com:105/vm-105-disk-0.raw,size=25G
vmgenid: 7fbfea0c-95ff-453e-a4ac-72bbf70e10cfqm config 105
agent: 1
balloon: 2000
bootdisk: virtio0
cores: 8
cpu: host
cpuunits: 5000
memory: 5024
name: Lubuntu
net0: virtio=E2:4A:D9:75:F4:3B,bridge=vmbr0,queues=8
numa: 1
ostype: l26
scsihw: virtio-scsi-pci
smbios1: uuid=4b1351cc-9b09-4058-95ea-b5be65647194
sockets: 1
vga: virtio
virtio0: px.mydomain.com:105/vm-105-disk-0.raw,size=25G
vmgenid: 7fbfea0c-95ff-453e-a4ac-72bbf70e10cf

 

[H4R0]

Try to install all virtio drivers on windows

https://fedorapeople.org/groups/virt/virtio-win/direct-downloads/stable-virtio/virtio-win.iso

 

[LnxBil]

Try to install all virtio drivers on windows

https://fedorapeople.org/groups/virt/virtio-win/direct-downloads/stable-virtio/virtio-win.iso

And change afterwards to the virtio devices, currently there is ide and e1000 used. Maybe the problem is the I/O throughput, so changing to SCSI via SCSI Virtio Controller (currently also set), it should be a lot faster.