From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Wed, 19 Feb 2003 23:15:55 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Wed, 19 Feb 2003 23:15:55 -0500 Received: from franka.aracnet.com ([216.99.193.44]:16554 "EHLO franka.aracnet.com") by vger.kernel.org with ESMTP id ; Wed, 19 Feb 2003 23:15:54 -0500 Date: Wed, 19 Feb 2003 20:25:52 -0800 From: "Martin J. Bligh" To: linux-kernel cc: lse-tech Subject: Performance of partial object-based rmap Message-ID: <7490000.1045715152@[10.10.2.4]> X-Mailer: Mulberry/2.2.1 (Linux/x86) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org The performance delta between 2.5.62-mjb1 and 2.5.62-mjb2 is caused by the partial object-based rmap patch (written by Dave McCracken). I expect this patch to have an increasing impact on workloads with more processes, and it should give a substantial space saving as well as a performance increase. Results from 16x NUMA-Q system ... Profile comparison: before 15525 page_remove_rmap 6415 page_add_rmap after 2055 page_add_rmap 1983 page_remove_rmap (performance of 62 was equivalent to 61) Kernbench-2: (make -j N vmlinux, where N = 2 x num_cpus) Elapsed User System CPU 2.5.61 45.77 561.71 118.87 1486.50 2.5.62-mjb1 45.81 564.41 112.76 1478.00 2.5.62-mjb2 44.88 563.64 98.29 1474.50 Kernbench-16: (make -j N vmlinux, where N = 16 x num_cpus) Elapsed User System CPU 2.5.61 47.46 565.70 144.77 1496.33 2.5.62-mjb1 47.21 569.17 139.55 1500.67 2.5.62-mjb2 46.09 568.19 121.83 1496.67 DISCLAIMER: SPEC(tm) and the benchmark name SDET(tm) are registered trademarks of the Standard Performance Evaluation Corporation. This benchmarking was performed for research purposes only, and the run results are non-compliant and not-comparable with any published results. Results are shown as percentages of the first set displayed SDET 1 (see disclaimer) Throughput Std. Dev 2.5.61 100.0% 4.5% 2.5.62-mjb1 95.2% 3.0% 2.5.62-mjb2 97.1% 4.6% SDET 2 (see disclaimer) Throughput Std. Dev 2.5.61 100.0% 4.3% 2.5.62-mjb1 93.4% 6.6% 2.5.62-mjb2 99.4% 6.1% SDET 4 (see disclaimer) Throughput Std. Dev 2.5.61 100.0% 2.4% 2.5.62-mjb1 101.9% 7.1% 2.5.62-mjb2 116.9% 1.5% SDET 8 (see disclaimer) Throughput Std. Dev 2.5.61 100.0% 7.4% 2.5.62-mjb1 111.1% 1.8% 2.5.62-mjb2 121.8% 5.9% SDET 16 (see disclaimer) Throughput Std. Dev 2.5.61 100.0% 2.0% 2.5.62-mjb1 105.0% 2.2% 2.5.62-mjb2 107.0% 2.1% SDET 32 (see disclaimer) Throughput Std. Dev 2.5.61 100.0% 7.9% 2.5.62-mjb1 112.4% 1.2% 2.5.62-mjb2 116.8% 0.9% SDET 64 (see disclaimer) Throughput Std. Dev 2.5.61 100.0% 1.2% 2.5.62-mjb1 111.0% 0.7% 2.5.62-mjb2 116.0% 0.9%