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I stumbled across this thread after having the same issues as the OP with 20.7 and I'd done much of the same types of troubleshooting. Unless I missed it, I didn't see any kind of conclusion. I've read various things about issues with some nic drivers using iflib, but I haven't been able to nail anything down. For example, this post about a new netmap kernel: https://forum.opnsense.org/index.php?topic=19175.0
Though I don't know if that would even apply here since I'm not using Sensei or Suricata. I am using the vmxnet3 driver on ESXi 7 and can't get more than 1Gb/sec through a new install of opnsense. No traffic shaping or anything and all test VMs (and opnsense) are on the same vswitch. Just going between a test VM and an opnsense LAN interface are stuck at 1Gb. I can at least get 4 Gb/sec using pfsense 2.4.x. I haven't tried older versions of opnsense.
The opnsense roadmap says "Fix stability and reliability issues with regard to vmx(4), vtnet(4), ixl(4), ix(4) and em(4) ethernet drivers." I guess I'm trying to find out of there are specific bugs or issues called out that this refers to. If the issue I'm seeing is already identified, great.
Though I don't know if that would even apply here since I'm not using Sensei or Suricata. I am using the vmxnet3 driver on ESXi 7 and can't get more than 1Gb/sec through a new install of opnsense. No traffic shaping or anything and all test VMs (and opnsense) are on the same vswitch. Just going between a test VM and an opnsense LAN interface are stuck at 1Gb. I can at least get 4 Gb/sec using pfsense 2.4.x. I haven't tried older versions of opnsense.
The opnsense roadmap says "Fix stability and reliability issues with regard to vmx(4), vtnet(4), ixl(4), ix(4) and em(4) ethernet drivers." I guess I'm trying to find out of there are specific bugs or issues called out that this refers to. If the issue I'm seeing is already identified, great.
