The test setup included two physical servers—net2s22c05 and net2s18c03—and one VM—sr-iov-vf-testvm—that was hosted on net2s22c Start the virtual network. Net2s22C05 had one each of the four Intel Ethernet Server Adapters listed above with one port in each adapter directly linked to a NIC port with equivalent link speed in net2s18c The following bash script lists all the VFs associated with a physical function. I built the driver from source and then loaded it into the kernel. However, the connection performance varies by a factor of depending on which host device model is selected. Otherwise, newer versions would have been used.
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The test setup included two physical servers—net2s22c05 and net2s18c03—and one VM—sr-iov-vf-testvm—that was hosted on net2s22c To autostart the network when the host machine boots, select the Autostart box so that the text changes from Never to On Boot. In fact lijux default device model for both command line and GUI is rtl, which performs 10x slower than virtio, which is the most ideal option.
Downloads for Intel® PRO/100 S Desktop Adapter
Note that there are several steps in this tutorial that cannot be done via the GUI. When using this method of directly inserting the PCI host device into the VM, there is no ability to change the host device model: There are a few downloads associated with this tutorial that you can get from github.
Using the Command Line Step 1: Once the VF has iintel created, the network adapter driver automatically creates the infrastructure necessary to use it. Using this method, KVM creates a pool of network devices that can be inserted into VMs, and the size of that pool is determined by how many VFs were created on the physical function when they were initialized.
Using the Command Line Once inyel VF has been created, the network adapter driver automatically creates the infrastructure necessary to use it. However, the connection performance varies by a factor of depending on which host device model is selected. Because this is not a performance-oriented paper, this data is provided only to give a rough idea of the performance of different configurations.
The one advantage to this method is that it allows control over which VF is inserted into the VM, whereas the virtual network pool of adapters method does not. See the command line Step ibtel above.
Software and Drivers for the Intel® PRO/ Adapter
I used version 2. In all cases, the host used the vfio driver. No link speed was listed in that configuration, the VM used the virtio-pci driver, and iperf performance was roughly line rate for the 10 Gbps adapters.
The NIC ports on each system were in the same subnet: The following bash script lists all the VFs associated with a physical function.
Autostart the virtual network. Net2s22C05 had one each of the four Intel Ethernet Server Adapters listed above with one port in each adapter directly linked to a NIC port with equivalent link speed in net2s18c Unlike the previous method, this method does not require you to know the PCI bus information for the VF, but you do need to know the name of the interface that the OS created for the VF when it was created.
Scope This tutorial does not focus on performance. See Step 1 above.
Downloads for Intel® ER Fast Ethernet Controller
Select Network as the type of device. The command I ran on the server system was.
Share Tweet Share Send. Performance is not significantly different than the method that involves a KVM virtual network pool of adapters.
Downloads for Intel® 82599 10 Gigabit Ethernet Controller
Display all virtual networks. When using the macvtap method of connecting an SR-IOV VF to a Intl, the host device model had a dramatic effect on all parameters, and there was no host driver information listed regardless of configuration. Additional Findings In every configuration, the test VM was able to communicate with both the host and with the external traffic generator, and the Inteel was able to continue communicating with the external traffic generator even when the host PF had no IP address assigned to it as long as the PF link state on the host remained up.
List physical network adapters that have VFs defined. I additionally evaluated ontel following: When evaluating the advantages and disadvantages of each insertion method, I looked at the following:. See the commands from Step 1 above.