From owner-freebsd-net@freebsd.org Sat Sep 22 22:49:01 2018 Return-Path: Delivered-To: freebsd-net@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 2191410A5D97 for ; Sat, 22 Sep 2018 22:49:01 +0000 (UTC) (envelope-from lev@FreeBSD.org) Received: from mailman.ysv.freebsd.org (mailman.ysv.freebsd.org [IPv6:2001:1900:2254:206a::50:5]) by mx1.freebsd.org (Postfix) with ESMTP id BC6A9859C1 for ; Sat, 22 Sep 2018 22:49:00 +0000 (UTC) (envelope-from lev@FreeBSD.org) Received: by mailman.ysv.freebsd.org (Postfix) id 8082A10A5D94; Sat, 22 Sep 2018 22:49:00 +0000 (UTC) Delivered-To: net@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 6F41E10A5D92 for ; Sat, 22 Sep 2018 22:49:00 +0000 (UTC) (envelope-from lev@FreeBSD.org) Received: from onlyone.not-for.work (onlyone.not-for.work [IPv6:2a01:4f8:201:6350::2]) by mx1.freebsd.org (Postfix) with ESMTP id 0C40F859BE; Sat, 22 Sep 2018 22:49:00 +0000 (UTC) (envelope-from lev@FreeBSD.org) Received: from lion.home.serebryakov.spb.ru (unknown [94.19.235.70]) (Authenticated sender: lev@serebryakov.spb.ru) by onlyone.not-for.work (Postfix) with ESMTPSA id DF1D843C; Sun, 23 Sep 2018 01:48:58 +0300 (MSK) Date: Sun, 23 Sep 2018 01:48:37 +0300 From: Lev Serebryakov Organization: FreeBSD Message-ID: <1083507782.20180923014837@serebryakov.spb.ru> To: net@FreeBSD.org CC: marius@FreeBSD.org Subject: Re: Looks like igb on 12-ALPHA6 (driver 7.6.1-k) and on 11-STABLE (driver 2.5.3-k) behave very differently on receive [regression?] In-Reply-To: <1377072414.20180922235207@serebryakov.spb.ru> References: <1377072414.20180922235207@serebryakov.spb.ru> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.27 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 22 Sep 2018 22:49:01 -0000 Hello Lev, Saturday, September 22, 2018, 11:52:07 PM, you wrote: > Any hints? I don't know why, but "server" host could not send more than 710Mbit/s with Ethernet flow control turned on. Turning flow control off helps. -- Best regards, Lev mailto:lev@FreeBSD.org