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Hi, Retbleed definately has an effect. With IOMMU and retbleed off, I am getting around the same speed for single thread as on 5.10 and just a little bit less on multiple threads. I guess we will just have to evaluate if the performance we are getting with retbleed mitigation on is sufficient...

It doesn't work quite as well on 5.15 with IOMMU off. With just one thread I am back at 4gbps: root@vxlantest:~# iperf -c 10.22.22.1 ------------------------------------------------------------ Client connecting to 10.22.22.1, TCP port 5001 TCP window size: 85.3 KByte (default)...

Hi, These are AMD Epyc processors. I thought I would have to enable IOMMU specifically. But I see from dmesg that it seems to be enabled by default. I will disable it as you suggest and try the 5.15 kernel again.

Thank you so much for testing this. I downgraded two hosts to 5.10 and there is definitely a difference. I'm still only getting around 5gbps with a single thread. But multiple threads perform much better. I'm also seeing better performance on the VLAN bridge. Here is a single thread test on...

Hi, that is interesting. I haven't tried using a bridge on the host. I might try to install the newest drivers from mellonox (mlnx-en). But I'm not sure which package to try since proxmox is using debian but with ubuntu kernel. Have you tried installing those?

I forgot to mention that I have adjusted the MTU on the host to 9000 and the interface on the VMs to 1500. The host network is like: Interfaces(ens10f0 and ens10f1)->bond0->vmbr0 2: ens10f0np0: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 9000 qdisc mq master bond0 state UP mode DEFAULT group...

Hello all, I have been testing the SDN network feature and successfully set up a EVPN zone using the steps outlined in the documentation: https://pve.proxmox.com/pve-docs/chapter-pvesdn.html#pvesdn_zone_plugin_evpn Everything seems to be working. But the speed I am getting between hosts is a...