From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261678AbVGZFx5 (ORCPT ); Tue, 26 Jul 2005 01:53:57 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261720AbVGZFx5 (ORCPT ); Tue, 26 Jul 2005 01:53:57 -0400 Received: from imf18aec.mail.bellsouth.net ([205.152.59.66]:36833 "EHLO imf18aec.mail.bellsouth.net") by vger.kernel.org with ESMTP id S261678AbVGZFx4 (ORCPT ); Tue, 26 Jul 2005 01:53:56 -0400 Message-ID: <012401c591a6$9a2e2040$0b00000a@solidwaste> From: To: "Florin Malita" , "Linux Kernel Mailing List" References: <20050724191211.48495.qmail@web53608.mail.yahoo.com> <1122248869.10835.25.camel@localhost.localdomain> Subject: Re: kernel 2.6 speed Date: Tue, 26 Jul 2005 01:55:18 -0400 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1506 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1506 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org ----- Original Message ----- From: "Florin Malita" To: "Linux Kernel Mailing List" Sent: Monday, July 25, 2005 12:10 AM Subject: Re: kernel 2.6 speed > On 7/24/05, Alan Cox wrote: > > time() isn't a hot > > path in the real world. > > That's what you would expect but I've straced stuff calling > gettimeofday() in huge bursts every other second. Obviously braindead > stuff but so is "the real world" most of the time() ... :) Anything time stamping things it processes many of will call some sort of time function pretty often. Could happen frequently with certain classes of applications. OS/2's "infoseg" approach was a pretty "high speed low drag" way to eliminate a trip into the kernel for all but the most esoteric time requirements.