AVX2 and AVX flags on VM

[millzee]

Hi,
i am trying to do a POC and get tensorflow server servicing client requests using a ubuntu vm with cpu setup.

if i do "cat /proc/cpuinfo" then on my vm, i dont see the avx ir avx2 flags.

Is there a setting I am missing when create the vm in proxmox?

 

[Ramalama]

change cpu to "host" or enable avx under advanced options?

 

[millzee]

Thanks Ramalama,
should there be an option for this in advance options? i'm on 6.2-15

also, is it good practice to use host? are there any potential dangers doing it like this?

 

[Ramalama]

no, tbh, i think almost everyone uses "host" here.
There are downsides if you do "live" migrations between 2 proxmox hosts, if the cpu on host 1 is completely different as on host 2.

in any other case, use simply "host".

 

[timdonovan]

OMG. I was trying to run some tensorflow code in docker on a VM this morning. Was getting Illegal instruction (core dumped). Lots of googling, came to the avx instruction set missing conclusion. Didn't think it would be possible, but changing the processor type to host worked. Thank you @Ramalama !!!

 

[lixaotec]

good to know.. same here . So host it is

 

[Myriamaz]

OMG. I was trying to run some tensorflow code in docker on a VM this morning. Was getting Illegal instruction (core dumped). Lots of googling, came to the avx instruction set missing conclusion. Didn't think it would be possible, but changing the processor type to host worked. Thank you @Ramalama !!!

Hello Can you please specify the linux commands you used to achieve this :
PS : I am on Ubuntu VM 20.04
Thanks a lot !

 

[Myriamaz]

change cpu to "host" or enable avx under advanced options?

Hey Ramalama,
Please can you provide linux commands for doing this
couldn't figure it out ?

Thanks

 

[Dunuin]

Changing CPU type from kvm64 to host you can do using the webUI under the VMs hardware tab.

 

[wedsonlopes]

change cpu to "host" or enable avx under advanced options?

it worked for me.

 

[aamrani]

What about LXC containers ? Is there an option to change the CPU to "Host" ?

 

[fiona]

Hi,

What about LXC containers ? Is there an option to change the CPU to "Host" ?

LXC containers already run directly on the host CPU.