Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Tue, 18 Dec 2001 04:45:20 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Tue, 18 Dec 2001 04:45:10 -0500 Received: from mail.loewe-komp.de ([62.156.155.230]:18442 "EHLO mail.loewe-komp.de") by vger.kernel.org with ESMTP id ; Tue, 18 Dec 2001 04:44:52 -0500 Message-ID: <3C1F10AA.A2D5367@loewe-komp.de> Date: Tue, 18 Dec 2001 10:47:22 +0100 From: Peter =?iso-8859-1?Q?W=E4chtler?= Organization: LOEWE. Hannover X-Mailer: Mozilla 4.78 [de] (X11; U; Linux 2.4.16 i686) X-Accept-Language: de, en MIME-Version: 1.0 To: "Ahmed, Zameer" CC: linux-kernel@vger.kernel.org Subject: Re: Turning off nagle algorithm in 2.2.x and 2.4.x kernels? In-Reply-To: Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org "Ahmed, Zameer" schrieb: > > Hi, > Is there a way to turn off nagle compression in the kernel for 2.2.x > and 2.4.x kernels? For the same custom app used under Solaris and Linux. > Turning off nagle algorithm boosted perf on Solaris, I tried commenting out > > #bool 'IP: Disable NAGLE algorithm (normally enabled)' CONFIG_TCP_NAGLE_OF > > from the net/ipv4/Config.in 2.2.19 kernel and still the degradation in > network performance for packts in midsize persists > I tried the 2.4.16 kernel. This gave me very slight improvement, but not > quite what is expected. > there is a setsockopt() - apply it to the fd returned from accept() man 7 tcp SOCKET OPTIONS To set or get a TCP socket option, call getsockopt(2) to read or setsockopt(2) to write the option with the socket family argument set to SOL_TCP. In addition, most SOL_IP socket options are valid on TCP sockets. For more informa? tion see ip(7). TCP_NODELAY Turn the Nagle algorithm off. This means that pack? ets are always sent as soon as possible and no unnecessary delays are introduced, at the cost of more packets in the network. Expects an integer boolean flag. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/