From mboxrd@z Thu Jan 1 00:00:00 1970 From: Vlad Zolotarov Subject: Re: DPDK RSS support for ixgbevf PMD Date: Tue, 16 Dec 2014 17:36:12 +0200 Message-ID: <5490516C.8090202@cloudius-systems.com> References: <6168753.p4Vk7dlKkK@xps13> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Cc: dev-VfR2kkLFssw@public.gmane.org, Avi Kivity , Gleb Natapov To: Thomas Monjalon Return-path: In-Reply-To: <6168753.p4Vk7dlKkK@xps13> List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces-VfR2kkLFssw@public.gmane.org Sender: "dev" 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. vlad > >> I wonder if there are any blockers to add this capability to the ixgbevf >> PMD and if not is it scheduled to some time soon? > Please jump in the above thread for your questions. > > My turn to ask a question: > Does it mean DPDK is going to be supported in your system (OSv)? > I've seen it in the OSv roadmap. > Could we have more details about how it would be integrated? > > Thanks