On Sat, Dec 13, 2014 at 01:44:36AM +0000, Anant Mudambi wrote: > Hi all, > I am using DPDK 1.7.0. > Qemu-KVM system with the Intel 10G X540 NIC; host has the Linux ixgbe PF > driver and a guest is using a VF with the DPDK ixgbevf PMD (uio). > I am trying to configure multiple (2 for now) receive queues on the VF and > use RSS. > I see packets coming only to queue 0 for some reason. Some questions about > this: > > 1] I see that most of the initial configuration to make multi-queue + RSS > work is done in ixgbe_dev_mq_rx_configure() > [e.g. Setting up the redirect table and the MRQC register]. However, > only the non-VF ixgbe_dev_rx_init() calls the above function; > ixgbevf_dev_rx_init() doesn't configure RSS-related hardware. Don't we > need to do this configuration to use RSS on a VF? > 2] Even after configuring the RSS-related hardware in ixgbevf PMD, packets > only come to queue 0. I printed out the RSS-type and RSS-hash-value > fields from the write back Rx descriptor and they are both set to 0. So > for some reason no RSS hash is being done for any packets. > 3] Has anyone seen this kind of configuration work (multi-queue + RSS + VF)? > I have an X540 NIC but has this worked on any other NIC for anyone? > 4] Also any ideas on how to debug this problem further? > > Thanks, > Anant
RSS redirection of traffic in a VF is not supported by the hardware, so you are pretty much stuck with all VF traffic going to queue 0. [Later hardware, such as 4x10G NICs e.g. "Intel? Ethernet Converged Network Adapters XL710" using the i40e driver should support RSS with VFs] /Bruce
