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Date: Wed, 23 May 2012 19:46:50 +0200 From: Eric Dumazet <eric.dumazet@...il.com> To: David Miller <davem@...emloft.net> Cc: kmansley@...arflare.com, bhutchings@...arflare.com, netdev@...r.kernel.org Subject: Re: TCPBacklogDrops during aggressive bursts of traffic On Wed, 2012-05-23 at 13:34 -0400, David Miller wrote: > But it is the only way we can have TCP processing scheduled and > accounted to user processes. That does have value when you have lots > of flows active. > > The scheduler's ability to give the process cpu time influences > TCP's behavier, and under load if the process can't get enough > cpu time then TCP will back off. We want that. But TCP already backs off if user process is not blocked on socket input. Modern applications uses select()/poll()/epoll() on many sockets in //. Only old ones stil block on recv(). -- 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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