Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Wed, 18 Apr 2001 08:02:11 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Wed, 18 Apr 2001 08:02:01 -0400 Received: from router-100M.swansea.linux.org.uk ([194.168.151.17]:27909 "EHLO the-village.bc.nu") by vger.kernel.org with ESMTP id ; Wed, 18 Apr 2001 08:01:46 -0400 Subject: Re: performance degradation on -ac tree To: jjs@mirai.cx (J Sloan) Date: Wed, 18 Apr 2001 13:03:24 +0100 (BST) Cc: linux-kernel@vger.kernel.org (linux-kernel) In-Reply-To: <3ADD140E.A4E2974D@mirai.cx> from "J Sloan" at Apr 17, 2001 09:12:00 PM X-Mailer: ELM [version 2.5 PL1] MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-Id: From: Alan Cox Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org > I have noticed that with e.g. the 2.4.0-test kernels, and e.g. > 2.4.2, netperf to localhost gets between 350-400 MB/s. > With recent -ac kernels, e.g. 2.4.3-ac5, netperf to localhost > gets more like 250 MB/sec. Thats one to ask Dave Miller. > The same activity with recent -ac kernels feels like running > through molasses, very sluggish, and it is I who am repeatedly > outmaneuvered and embarrassed. It's quite awful. The 2.4.3ac VM is far from ideal at the moment. Its a lot smoother for server use and it doesnt spend so much time randomly killing wrong things but it does stall too much - 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/