From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Sun, 8 Dec 2002 16:20:55 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Sun, 8 Dec 2002 16:20:55 -0500 Received: from holomorphy.com ([66.224.33.161]:61077 "EHLO holomorphy") by vger.kernel.org with ESMTP id ; Sun, 8 Dec 2002 16:20:54 -0500 Date: Sun, 8 Dec 2002 13:28:08 -0800 From: William Lee Irwin III To: Manfred Spraul Cc: anton@samba.org, linux-kernel@vger.kernel.org Subject: Re: 2.5.50-BK + 24 CPUs Message-ID: <20021208212808.GY9882@holomorphy.com> Mail-Followup-To: William Lee Irwin III , Manfred Spraul , anton@samba.org, linux-kernel@vger.kernel.org References: <3DF3B7FB.9010902@colorfullife.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <3DF3B7FB.9010902@colorfullife.com> User-Agent: Mutt/1.3.25i Organization: The Domain of Holomorphy Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Anton wrote: >> ie during the compile we scheduled 56283 times, and 41984 of them were >> caused by pipes. On Sun, Dec 08, 2002 at 10:22:03PM +0100, Manfred Spraul wrote: > The linux pipe implementation has only a page sized buffer - with 4 kB > pages, transfering 1 MB through a pipe means at 512 context switches. Hmm. What happened to that pipe buffer size increase patch? That sounds like it might help here, but only if those things are trying to shove more than 4KB through the pipe at a time. Bill