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Date: Thu, 5 Nov 2009 19:03:02 +0200 From: Octavian Purdila <opurdila@...acom.com> To: Eric Dumazet <eric.dumazet@...il.com> Cc: Lucian Adrian Grijincu <lgrijincu@...acom.com>, netdev@...r.kernel.org Subject: Re: [RFC] [PATCH] udp: optimize lookup of UDP sockets to by including destination address in the hash key On Thursday 05 November 2009 18:36:50 you wrote: > Octavian Purdila a écrit : > > IIRC, we first saw this issue in VoIP tests with up to 16000 sockets > > bound on a certain port and IP addresses (each IP address is assigned to > > a particular interface). We need this setup in order to emulate lots of > > VoIP users each with a different IP address and possible a different L2 > > encapsulation. > > Interesting case indeed, is it SIP 5060 port or RTP ports ? > (I want to know how many messages per second you want to receive) > > An rbtree with 16000 elements has 15 levels, its a lot, but OK > for small trafic. > Yep the signaling port not the RTP port, and yes I think there is a fairly small amount of traffic and rbtree might work. BTW, there is another side of this problem, the time to bind() those 16K sockets before starting the test - at least on 2.6.7 we didn't yet get to look at this issue on a recent kernel. Thanks, tavi -- 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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