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Date: Tue, 20 Feb 2007 14:23:13 +0300 From: Evgeniy Polyakov <johnpol@....mipt.ru> To: Eric Dumazet <dada1@...mosbay.com> Cc: David Miller <davem@...emloft.net>, akepner@....com, linux@...izon.com, netdev@...r.kernel.org, bcrl@...ck.org Subject: Re: Extensible hashing and RCU On Tue, Feb 20, 2007 at 12:10:22PM +0100, Eric Dumazet (dada1@...mosbay.com) wrote: > Please explain why you chose h = jhash_2words(faddr, laddr, ports); > h ^= h >> 16; > h ^= h >> 8; > > jhash is very good, no need to try to be smarter, shufling some bytes... and > adding artifacts. If distribution is fair its whift produces still fair distribution. In the discussion linked at that test I also produced results without shifts, which were exactly the same. -- Evgeniy Polyakov - 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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