Ilpo Järvinen a écrit :

On Fri, 31 Oct 2008, Eric Dumazet wrote:

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David Miller a écrit :

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From: "Ilpo Järvinen" <redacted>
Date: Fri, 31 Oct 2008 11:40:16 +0200 (EET)

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Let me remind that it is just a single process, so no ping-pong 

& other

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lock related cache effects should play any significant role here, 

no? (I'm

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no expert though :-)).
Not locks or ping-pongs perhaps, I guess.  So it just sends and

receives over a socket, implementing both ends of the communication
in the same process?

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If hash chain conflicts do happen for those 2 sockets, just 

traversing

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the chain 2 entries deep could show up.

tbench is very sensible to cache line ping-pongs (on SMP machines of 
course)

...Sorry to disappoint you but we were discussion there on my AIM9 
tcp_test results :-).

Well, before you added AIM9 on this topic, we were focusing on tbench :)

Sorry to disappoint you :)