From mboxrd@z Thu Jan 1 00:00:00 1970 From: Vlad Zolotarov Subject: Re: [PATCH v3 0/6] Enable VF RSS for Niantic Date: Mon, 05 Jan 2015 15:02:28 +0200 Message-ID: <54AA8B64.4060602@cloudius-systems.com> References: <1419389808-9559-1-git-send-email-changchun.ouyang@intel.com> <1419398584-19520-1-git-send-email-changchun.ouyang@intel.com> <549A8E7C.7010806@cloudius-systems.com> <20150105103802.GB13152@bricha3-MOBL3> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Cc: "dev-VfR2kkLFssw@public.gmane.org" To: Bruce Richardson , "Ouyang, Changchun" Return-path: In-Reply-To: <20150105103802.GB13152@bricha3-MOBL3> 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 01/05/15 12:38, Bruce Richardson wrote: > On Thu, Dec 25, 2014 at 01:46:54AM +0000, Ouyang, Changchun wrote: >> Hi, >> >>> -----Original Message----- >>> From: Vlad Zolotarov [mailto:vladz-RmZWMc9puTNJc61us3aD9laTQe2KTcn/@public.gmane.org] >>> Sent: Wednesday, December 24, 2014 5:59 PM >>> To: Ouyang, Changchun; dev-VfR2kkLFssw@public.gmane.org >>> Subject: Re: [dpdk-dev] [PATCH v3 0/6] Enable VF RSS for Niantic >>> > > >>> On the contrary - it's a very good idea! We use DPDK on Amazon's guests >>> with enhanced networking and we have no access to the PF. We still need to >>> know the RSS redirection rules for our VF pool. From the 82599 spec, chapter >>> 4.6.10.1.1: "redirection table is common to all the pools and only indicates the >>> queue inside the pool to use once the pool is chosen". In that case we need >>> to get the whole 128 entries of the RETA. Is there a reason why we can't have >>> it? >>> >> Due to hardware limitation, VF could not query its own reta table, because there is not its own reta, >> The reta table shared by pf and all vfs. >> If you need know it, query them on pf is feasible way to do it. >> > It's not feasible if you only have access to a guest. :-) > IMHO since the guest is seeing the results of the RSS redirection table, > it should be able to query the table, if it wants. It should not, however, > be able to modify the table, as it is owned by the PF. This is exactly what I meant! ;) The problem at the moment is that upstream PF driver has no VF-PF command for that and I'm in the process of pushing the patch for it. Then it's accepted (and pushed into the Amazon's HV ;)) then DPDK's VF driver may proceed with what u and me are suggesting. Not related question to Intel guys: I can't find a x550 spec in the net. Can anybody tell me where it may be found? ;) > > Regards, > /Bruce >