High CPU load while downloading files

[Vengance]

Hi,
I have the latest version of pfSense running on my HP MicroServer Gen8. I assigned the VM with pfSense 2 Cores and 1 GB RAM.
If I download something on one of the computer connected to pfsense, the CPU load increases to 100%

What can I do to solve this? :)

[heper]

what hypervisor?

[Vengance]

Proxmox (KVM)

[heper]

KVM is known to have some issue's:

https://forum.pfsense.org/index.php?topic=88467.0

hope it helps somewhat.

[Vengance]

I don´t think that KVM causes the problem. Maybe pfSense analyzes the packages and that causes the high load?

[KOM]

What packages do you have installed?  Squid w/ICAP?

[Vengance]

No, i haven´t installed any package.

[JasonJoel]

If you don't have any packages installed, then it definitely IS an issue with KVM, as the base product has pretty low CPU usage even at high throughputs.

[Vengance]

The CPU load only increases when I download something. Are you sure, that KVM is the problem?

[Harvy66]

high cpu load is the symptom of of a VM Guest not interacting well with the host. PFSense runs fine at multi-gigabit speeds out of the box on desktop grade CPUs and decent NICs.

[KOM]

Are you sure, that KVM is the problem?

We're sure that it's not pfSense that is the problem.

[Vengance]

Which Networkcard should I use in KVM for the pfSense VM?

Intel E1000
VirtIO (Paravirtualized)
Realtek RTL8139
VMWare vmxnet3

Thank you!