From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754320AbZBBIgf (ORCPT ); Mon, 2 Feb 2009 03:36:35 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751900AbZBBIg0 (ORCPT ); Mon, 2 Feb 2009 03:36:26 -0500 Received: from mail-in-06.arcor-online.net ([151.189.21.46]:56695 "EHLO mail-in-06.arcor-online.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751797AbZBBIgZ (ORCPT ); Mon, 2 Feb 2009 03:36:25 -0500 X-DKIM: Sendmail DKIM Filter v2.6.0 mail-in-17.arcor-online.net 339313B2696 Subject: Re: [Bugme-new] [Bug 12562] New: High overhead while switching or synchronizing threads on different cores From: Thomas Pilarski To: Peter Zijlstra Cc: Mike Galbraith , Andrew Morton , Gregory Haskins , bugme-daemon@bugzilla.kernel.org, linux-kernel@vger.kernel.org In-Reply-To: <1233562763.4787.71.camel@laptop> References: <20090128125604.94ed3fe0.akpm@linux-foundation.org> <1233181507.6988.14.camel@bugs-laptop> <1233220048.7835.19.camel@twins> <1233223979.5294.41.camel@bugs-laptop> <1233224644.5294.52.camel@bugs-laptop> <1233229028.4495.34.camel@laptop> <1233237934.11129.183.camel@bugs-laptop> <1233302270.6061.9.camel@marge.simson.net> <1233560635.4126.18.camel@localhost.localdomain> <1233562763.4787.71.camel@laptop> Content-Type: text/plain Date: Mon, 02 Feb 2009 09:33:20 +0100 Message-Id: <1233563600.3669.36.camel@localhost.localdomain> Mime-Version: 1.0 X-Mailer: Evolution 2.24.3 (2.24.3-1.fc10) Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Am Montag, den 02.02.2009, 09:19 +0100 schrieb Peter Zijlstra: > I suppose you'll have to go bug the glibc people about their random() > implementation. Yes, I will. > If you really need random() to perform for your application (monte-carlo > stuff?) You might be better off writing a PRNG with TLS state or > something. I just need some noise in my images.