From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261460AbVGIJCw (ORCPT ); Sat, 9 Jul 2005 05:02:52 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263171AbVGIJCw (ORCPT ); Sat, 9 Jul 2005 05:02:52 -0400 Received: from tag.witbe.net ([81.88.96.48]:1229 "EHLO tag.witbe.net") by vger.kernel.org with ESMTP id S261460AbVGIJCv (ORCPT ); Sat, 9 Jul 2005 05:02:51 -0400 Message-Id: <200507090901.j6991PD22890@tag.witbe.net> Reply-To: From: "Paul Rolland" To: "'Kristian Benoit'" , Cc: , , , , , , , , , , , , , , Subject: Re: PREEMPT_RT and I-PIPE: the numbers, part 4 Date: Sat, 9 Jul 2005 11:01:24 +0200 Organization: Witbe MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit X-Mailer: Microsoft Office Outlook, Build 11.0.6353 In-Reply-To: <42CF05BE.3070908@opersys.com> X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1441 Thread-Index: AcWEEmNKNNT3RLi0ThOm8hxRLAgb7QAUb2pw x-ncc-regid: fr.witbe Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hello, > "IRQ & hd" run: > Measurements | Vanilla | preempt_rt | ipipe > ---------------+-------------+----------------+------------- > fork | 101us | 94us (-7%) | 103us (+2%) > open/close | 2.9us | 2.9us (~) | 3.0us (+3%) > execve | 366us | 370us (+1%) | 372us (+2%) > select 500fd | 14.3us | 18.1us (+27%) | 14.5us (+1%) > mmap | 794us | 654us (+18%) | 822us (+4%) ^^^^^^^^^^^^ You mean -18%, not +18% I think. Just having a quick long at the numbers, it seems that now the "weak" part in PREEMPT_RT is the select 500fd test. Ingo, any idea about this one ? Regards, Paul