Hi , > -----Original Message----- > From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of Vlad Zolotarov > Sent: Tuesday, December 16, 2014 11:36 PM > To: Thomas Monjalon > Cc: dev at dpdk.org; Avi Kivity; Gleb Natapov > Subject: Re: [dpdk-dev] DPDK RSS support for ixgbevf PMD > > > On 12/15/14 22:33, Thomas Monjalon wrote: > > 2014-12-15 21:11, Vladislav Zolotarov: > >> Hi, > >> I'm running an ixgbevf PMD on an AWS guests with extended networking > >> (SR-IOV functions of 82599 Intel's NIC) and noticed that even in the > >> current git tree there is no support for a multi-queue in this PMD: > >> reta size returned by rte_eth_dev_info_get() call is 0, while > >> max_rx_queues and max_tx_queues are both 4. > >> > >> Linux ixgbevf-2.15.3 driver on the other hand successfully > >> initializes 2 RSS queues: for some reason it always limits the number of > RSS queues by 2. > >> > >> ixgbevf_main.c: line 2539 > >> u16 rss = min_t(u16, num_online_cpus(), 2); > >> > >> The above is strange since if MRQE is set to 1010b there are 4 RSS > >> queues available which seems to be the case in my AWS Guest. > >> > >> However, let's get back to DPDK. As I've mentioned above the SR-IOV > >> function i have is RSS capable (to be 100% sure I've verified both > >> queues are receiving packets in a multi-socket TCP test). And it's a > >> shame I can't utilize it with a DPDK. > > Yes, it is not yet supported. > > But a patch was recently sent: > > http://dpdk.org/ml/archives/dev/2014-December/010028.html > > Applying this patchset seems to break the NIC fast path functionality of a > AWS Guest NIC. > I'm still debugging it - will update u as soon as I have more specific info. > Pls make sure enabling and using 4 queues on guest if you enable vf rss on host and if each vf has 4 queues, The packet could be received and put in any of 4 queues on guest depend on hash value of the packet. You could let packet IP address increased continuously and make those packets distribute to different queues.
Thanks Changchun
