From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750964AbVJXD5y (ORCPT ); Sun, 23 Oct 2005 23:57:54 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750965AbVJXD5y (ORCPT ); Sun, 23 Oct 2005 23:57:54 -0400 Received: from gateway-1237.mvista.com ([12.44.186.158]:42990 "EHLO hermes.mvista.com") by vger.kernel.org with ESMTP id S1750962AbVJXD5x (ORCPT ); Sun, 23 Oct 2005 23:57:53 -0400 Subject: Re: Robust Futexes status From: Sven-Thorsten Dietrich To: david singleton Cc: robustmutexes@lists.osdl.org, Roy Reichwein , linux-kernel@vger.kernel.org, Kevin Morgan In-Reply-To: References: Content-Type: text/plain Date: Sun, 23 Oct 2005 20:48:00 -0700 Message-Id: <1130125681.5296.5.camel@imap.mvista.com> Mime-Version: 1.0 X-Mailer: Evolution 2.2.3 (2.2.3-2.fc4) Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Sun, 2005-10-23 at 13:52 -0700, david singleton wrote: > Inaky Perez-Gonzalez has a wonderful suite of performance, stress and > functionality tests for the fusyn pthreads mutex package. > The graphs are just to show relative performance for the different > flavor kernels. The > kernel's perform quite closely regardless of the 'flavor' of kernel. > The kernels have quite a few > debugging options turned so I can look for any problems so performance > is not optimal. > The Mutex ownership change seems to climb with waiting threads. Its hard to tell with the log-n X-axis scale, but does this possibly correlate to the deadlock-detect option? If Deadlock-detect is enabled we should be seeing a graph proportional to n-squared on a linear X axis. If deadlock detect is disabled, the wait time should plateau for very large N. Sven > It appears the robust futex functionality is healthy in all flavors of > kernel. > > > > David > > > > -- *********************************** Sven-Thorsten Dietrich Real-Time Software Architect MontaVista Software, Inc. 1237 East Arques Ave. Sunnyvale, CA 94085 Phone: 408.992.4515 Fax: 408.328.9204 http://www.mvista.com Platform To Innovate ***********************************