From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751918AbWGATmZ (ORCPT ); Sat, 1 Jul 2006 15:42:25 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751919AbWGATmZ (ORCPT ); Sat, 1 Jul 2006 15:42:25 -0400 Received: from pentafluge.infradead.org ([213.146.154.40]:50141 "EHLO pentafluge.infradead.org") by vger.kernel.org with ESMTP id S1751918AbWGATmY (ORCPT ); Sat, 1 Jul 2006 15:42:24 -0400 Subject: Re: [patch 0/2] sLeAZY FPU feature From: Arjan van de Ven To: Nick Piggin Cc: linux-kernel@vger.kernel.org, akpm@osdl.org, ak@suse.de In-Reply-To: <44A6B387.80207@yahoo.com.au> References: <1151773893.3195.45.camel@laptopd505.fenrus.org> <44A6B387.80207@yahoo.com.au> Content-Type: text/plain Date: Sat, 01 Jul 2006 21:42:22 +0200 Message-Id: <1151782942.3195.56.camel@laptopd505.fenrus.org> Mime-Version: 1.0 X-Mailer: Evolution 2.2.3 (2.2.3-2.fc4) Content-Transfer-Encoding: 7bit X-SRS-Rewrite: SMTP reverse-path rewritten from by pentafluge.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Sun, 2006-07-02 at 03:40 +1000, Nick Piggin wrote: > What sort of test? the one I did was long running FPU app (calculating PI using FPU) > Any idea of the results for a best case microbenchmark > (something like two threads ping-pong a couple of futexes between them, > in between doing a single FPU op) ok I wrote a test scenario for this; the performance gain I get with this is 8.5% the FPU part of the hot loop I used is A = 0.3 * (A+B); with A and B doubles