Thank you for your reply. But, I already read it. According to MSDN, If packets that have the same source and destination ip address are coming, then its processing CPU index or number should be the same. but, at least in Linux, It's not. I mean current CPU (return value of smp_processor()) is not the same. (in fact, I'm not concern CPU number) But there are some rules. I've traced ixgbe device driver source code (version 1.3.64). and I got a result like below.(I already said in my previous posting.)
If indirection table entry value have 1, then rx queue number 6,2 are always selected. if it is 2, then 5 and 1. and so on. I means every one of indirection table entry value is matched two of rx queue index. at this time, It's better to say about my brief testing environment. NIC : one of 82598EB AF 10G CPU : two of Quad-Core Xeon (It means 8 cpu cores, 8 rx queues and 8 tx queue by MSI-X) device driver : ixgbe version 1.3.56.17 (Yes, I know current version is 2.0.x.x) without DCA and LRO, with MSI-X OS : Linux kernel version 2.6.28-11 (Ubuntu server) Focus of my testing is if RSS is work properly in Linux (If I have right understanding about RSS), then every indirection table entry - as you already know, its index number is computed by RSS hash function - should select just one of rx queue. (I'm afraid that you are getting me wrong because of my poor English.) If I can, there is a way, then I'd like to change it like this : one to one mapping between indirection table entry value and rx qeueu index. I mean if source and destination IP address is the same, posting rx queue have to be fixed. Thank you. Best regards. Brandeburg, Jesse 쓴 글: > http://msdn.microsoft.com/en-us/library/ms795616.aspx > > -----Original Message----- > From: 배영부 [mailto:r...@piolink.com] > Sent: Monday, June 29, 2009 7:28 PM > To: e1000-devel@lists.sourceforge.net > Subject: [E1000-devel] [ixgbe] In RSS, I'd like to know algorithm that select > rx packet descriptor queue. > > Hi there, > > According to Intel 82598EB datasheet, > "RSS is a mechanism to post each received packet into one of several > descriptor queues." > but there isn't any description about algorithm to select descriptor queue. > I'm inspecting about it. But, I can't find what is it, even digging into > ixgbe device driver code. > Could anybody help me? > If there are someone who know about it, please let me know. > Thank you in advance. > > Best regards. > > P.S. sorry for my poor English again. > > ------------------------------------------------------------------------------ > _______________________________________________ > E1000-devel mailing list > E1000-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/e1000-devel > ------------------------------------------------------------------------------ _______________________________________________ E1000-devel mailing list E1000-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/e1000-devel
