Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758709AbXEKN1W (ORCPT ); Fri, 11 May 2007 09:27:22 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1758535AbXEKN0r (ORCPT ); Fri, 11 May 2007 09:26:47 -0400 Received: from mx1.redhat.com ([66.187.233.31]:54141 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752403AbXEKN0j (ORCPT ); Fri, 11 May 2007 09:26:39 -0400 Message-Id: <20070511131541.992688403@chello.nl> User-Agent: quilt/0.46-1 Date: Fri, 11 May 2007 15:15:41 +0200 From: Peter Zijlstra To: linux-mm@kvack.org, linux-kernel@vger.kernel.org Cc: Oleg Nesterov , Andrew Morton , Ingo Molnar , Thomas Gleixner , Nick Piggin Subject: [PATCH 0/2] convert mmap_sem to a scalable rw_mutex Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1447 Lines: 43 I was toying with a scalable rw_mutex and found that it gives ~10% reduction in system time on ebizzy runs (without the MADV_FREE patch). 2-way x86_64 pentium D box: 2.6.21 /usr/bin/time ./ebizzy -m -P 60.10user 137.72system 1:49.59elapsed 180%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (0major+33555877minor)pagefaults 0swaps /usr/bin/time ./ebizzy -m -P 59.73user 139.50system 1:50.28elapsed 180%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (0major+33555878minor)pagefaults 0swaps /usr/bin/time ./ebizzy -m -P 59.49user 137.74system 1:49.22elapsed 180%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (0major+33555877minor)pagefaults 0swaps 2.6.21-rw_mutex /usr/bin/time ./ebizzy -m -P 57.85user 124.30system 1:42.99elapsed 176%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (0major+33555877minor)pagefaults 0swaps /usr/bin/time ./ebizzy -m -P 58.09user 124.11system 1:43.18elapsed 176%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (0major+33555876minor)pagefaults 0swaps /usr/bin/time ./ebizzy -m -P 57.36user 124.92system 1:43.52elapsed 176%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (0major+33555877minor)pagefaults 0swaps -- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/