Messages in this thread | | | Subject | Re: [RFC] [TCP 1/3] tcp: Add MSG_NEW_PACKET flag to indicate preferable packet boundaries | From | Andreas Gruenbacher <> | Date | Mon, 02 Jul 2012 13:00:56 +0200 |
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On Fri, 2012-06-29 at 19:15 +0200, Eric Dumazet wrote: > On Fri, 2012-06-29 at 17:38 +0200, Andreas Gruenbacher wrote: > > > The primary use case is fast Gigabit (10 or more) Ethernet connections > > with jumbo frames and switches that support them. There, frames will go > > through unchanged and you can zero-copy receive all the time. > > > > Not sure how well the approach scales to other kinds of connections; it > > may work often enough to be worth it. When things get distorted between > > the sender and the receiver and tcp_recvbio() fails, the data can still > > be copied out of the socket as before. > > If you have a packet loss, receiver can and will coalesce frames.
That's alright as long as we'll get "back to normal" eventually; the only effect will be that we'll copy data out of the socket receive buffers for a while. There will be extremely little packet loss on the kinds of networks that we want to use this on.
Thanks, Andreas
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