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Date: Mon, 26 Apr 2010 18:47:52 +0100 From: Ben Hutchings <bhutchings@...arflare.com> To: Tom Herbert <therbert@...gle.com> Cc: Eric Dumazet <eric.dumazet@...il.com>, davem@...emloft.net, netdev@...r.kernel.org Subject: Re: [PATCH] bnx2x: add support for receive hashing On Mon, 2010-04-26 at 10:38 -0700, Tom Herbert wrote: > > Hi Tom > > > > I tested this rxhash feature on my bnx2x card, using latest net-next-2.6 > > and appropriate ethtool > > > > ethtool -k eth1 rxhash on > > > > Then I used my pktgen script, to flood machine with flows with udp dst > > port varying between 4000 and 4015. > > > > Software generated rxhash is OK (16 different values). > > > > But with bnx2x provided hash, all skb were hashed to same rxhash > > value :( > > > > What are the specs of this hardware hash ? > > It seems to not care of udp source/destination ports. > > > > It would appear that way :-(. I was going to ping Broadcom folks to > see if there's support for UDP. [...] Unfortunately the widely-implemented Toeplitz hash functions are defined only for TCP/IPv4, TCP/IPv6, IPv4 and IPv6. Ben. -- Ben Hutchings, Senior Software Engineer, Solarflare Communications Not speaking for my employer; that's the marketing department's job. They asked us to note that Solarflare product names are trademarked. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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