Did you consult the datasheet? It says that the VF only supports one queue.
Paul > Am 12.12.2017 um 13:58 schrieb .. <[email protected]>: > > I assume my message was ignored due to it not being related to dpdk > software? > > > On 11 December 2017 at 10:14, .. <[email protected]> wrote: > >> Hi, >> >> I have an intel I350-T2 which I use for SR-IOV, however, I am hitting some >> rx_dropped on the card when I start increasing traffic. (I have got more >> with the same software out of a identical bare metal system) >> >> I am using the Intel igb driver on Centos 7.2 (downloaded from Intel not >> the driver installed with Centos), so the RSS parameters amongst others are >> availbe to me >> >> This then led me to investigate the interrupts on the tx rx ring buffers >> and I noticed that the interface (vfs enabled) only had on tx/rx queue. Its >> distributed between This is on the KVM Host >> >> CPU0 CPU1 CPU2 CPU3 CPU4 >> CPU5 CPU6 CPU7 CPU8 >> 100: 1 33 137 0 0 >> 0 0 0 0 IR-PCI-MSI-edge ens2f1 >> 101: 2224 0 0 6309 178807 >> 0 0 0 0 IR-PCI-MSI-edge ens2f1-TxRx-0 >> >> Looking at my standard nic ethernet ports I see 1 rx and 4 rx queues >> >> On the VM I only get one tx one rx queue ( I know all the interrupts are >> only using CPU0) but that is defined in our builds. >> >> egrep "CPU|ens11" /proc/interrupts >> CPU0 CPU1 CPU2 CPU3 CPU4 >> CPU5 CPU6 CPU7 >> 34: 715885552 0 0 0 0 >> 0 0 0 0 PCI-MSI-edge ens11-tx-0 >> 35: 559402399 0 0 0 0 >> 0 0 0 0 PCI-MSI-edge ens11-rx-0 >> >> I activated RSS in my card, and can set if, however if I use the param >> max_vfs=n then it defaults back to to 1 rx 1 tx queue per nic port >> >> [ 392.833410] igb 0000:07:00.0: Using MSI-X interrupts. 1 rx queue(s), 1 >> tx queue(s) >> [ 393.035408] igb 0000:07:00.1: Using MSI-X interrupts. 1 rx queue(s), 1 >> tx queue(s) >> >> I have been reading some of the dpdk older posts and see that VF RSS is >> implemented in some cards, does anybody know if its available in this card >> (from reading it only seemed the 10GB cards) >> >> One of my plans aside from trying to create more RSS per VM is to add more >> CPUS to the VM that are not isolated so that the rx and tx queues can >> distribute their load a bit to see if this helps. >> >> Also is it worth investigating the VMDq options, however I understand this >> to be less useful than SR-IOV which works well for me with KVM. >> >> >> Thanks in advance, >> >> Rolando >> -- Chair of Network Architectures and Services Department of Informatics Technical University of Munich Boltzmannstr. 3 85748 Garching bei München, Germany
