From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Vagin Subject: Re: Slow speed of tcp connections in a network namespace Date: Sun, 30 Dec 2012 01:19:39 +0400 Message-ID: <20121229211938.GC4350@paralelels.com> References: <20121229092417.GA4038@paralelels.com> <1356789203.21409.3923.camel@edumazet-glaptop> <20121229145030.GA7959@paralelels.com> <1356802828.21409.4623.camel@edumazet-glaptop> <1356807516.4102.4.camel@edumazet-laptop> <1356810062.21409.4991.camel@edumazet-glaptop> <20121229200848.GA3389@paralelels.com> <1356815546.21409.5277.camel@edumazet-glaptop> Mime-Version: 1.0 Content-Type: text/plain; charset="koi8-r" Cc: , , =?utf-8?B?TWljaGHFgiBNaXJvc8WCYXc=?= To: Eric Dumazet Return-path: Received: from relay.parallels.com ([195.214.232.42]:33889 "EHLO relay.parallels.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753149Ab2L2VUN (ORCPT ); Sat, 29 Dec 2012 16:20:13 -0500 Content-Disposition: inline In-Reply-To: <1356815546.21409.5277.camel@edumazet-glaptop> Sender: netdev-owner@vger.kernel.org List-ID: On Sat, Dec 29, 2012 at 01:12:26PM -0800, Eric Dumazet wrote: > On Sun, 2012-12-30 at 00:08 +0400, Andrew Vagin wrote: > > > Is it right, that a received window will be less, if packets are not sorted? > > Looks like a bug. > > Not really a bug. > > TCP is very sensitive to packet reorders. I wont elaborate here as > its a bit off topic. > > Try to reorders credits/debits on your bank account, I am pretty sure > you'll lose some money or even get serious troubles. > > Of course, enabling GRO on eth0 would definitely help a bit... > > (once/iff veth driver features are fixed to allow GSO packets being > forwarded without being segmented again) > Eric, thank you for the help. I need time for thinking. I will ask you, if new questions will appear. > >