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Date: Thu, 22 Mar 2012 15:29:54 -0700 From: Eric Dumazet <eric.dumazet@...il.com> To: Josh Hunt <joshhunt00@...il.com> Cc: Hagen Paul Pfeifer <hagen@...u.net>, netdev@...r.kernel.org Subject: Re: long-lived tcp connection question On Thu, 2012-03-22 at 17:27 -0500, Josh Hunt wrote: > On Thu, Mar 22, 2012 at 4:51 PM, Hagen Paul Pfeifer <hagen@...u.net> wrote: > > * Josh Hunt | 2012-03-22 11:56:19 [-0500]: > > > >>Given things like web sockets with presumably long-lived persistent > >>tcp connections and a sparse amount of data, I was wondering if there > >>are currently any mechanisms in the kernel or out of tree projects > >>which work on reducing the overhead these connections require? > >>Possibly storing their state after a certain period of inactivity and > >>then reviving them when work needs to be done? I'm thinking something > >>along the lines of the state info stored for time-wait sockets and > >>then the ability to resurrect it on an incoming packet. Keeping > >>resources around for such connections seems inefficient although > >>possibly unavoidable. > > > > Do you referring to something like this: > > > > https://datatracker.ietf.org/doc/draft-ietf-tcpm-fastopen/ > > > > The Linux code is not released yet, but I know that the required storage > > overhead is small. Search the IETF email archive for more background > > information about the topic. > > > > Hagen > > > > No, this deals more with the overhead of establishing a connection. > I'm asking more about the overhead associated with holding on to > long-lived connections which may not be doing much. > So what are the actual numbers for this overhead per socket ? -- 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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