From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261783AbVDCOhq (ORCPT ); Sun, 3 Apr 2005 10:37:46 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261782AbVDCOhq (ORCPT ); Sun, 3 Apr 2005 10:37:46 -0400 Received: from holly.csn.ul.ie ([136.201.105.4]:20366 "EHLO holly.csn.ul.ie") by vger.kernel.org with ESMTP id S261783AbVDCOhg (ORCPT ); Sun, 3 Apr 2005 10:37:36 -0400 Date: Sun, 3 Apr 2005 15:37:36 +0100 (IST) From: Mel Gorman X-X-Sender: mel@skynet To: Linux Memory Management List , Linux Kernel Mailing List Subject: AIM9 slowdowns between 2.6.11 and 2.6.12-rc1 Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org While testing the page placement policy patches on 2.6.12-rc1, I noticed that aim9 is showing significant slowdowns on page allocation-related tests. An excerpt of the results is at the end of this mail but it shows that page_test is allocating 18000 less pages. I did not check who has been recently changing the buddy allocator but they might want to run a benchmark or two to make sure this is not something specific to my setup. root@monocle:~# grep _test vmregressbench-2.6.11-standard/aim9/log.txt 7 page_test 60.01 4420 73.65439 125212.46 System Allocations & Pages/second 8 brk_test 60.00 1732 28.86667 490733.33 System Memory Allocations/second 9 jmp_test 60.01 252898 4214.26429 4214264.29 Non-local gotos/second 10 signal_test 60.00 5983 99.71667 99716.67 Signal Traps/second 11 exec_test 60.01 788 13.13114 65.66 Program Loads/second 12 fork_test 60.06 986 16.41692 1641.69 Task Creations/second 13 link_test 60.00 6302 105.03333 6617.10 Link/Unlink Pairs/second root@monocle:~# grep _test vmregressbench-2.6.12-rc1-standard/aim9/log.txt 7 page_test 60.01 3784 63.05616 107195.47 System Allocations & Pages/second 8 brk_test 60.02 1194 19.89337 338187.27 System Memory Allocations/second 9 jmp_test 60.00 252312 4205.20000 4205200.00 Non-local gotos/second 10 signal_test 60.00 3731 62.18333 62183.33 Signal Traps/second 11 exec_test 60.08 762 12.68309 63.42 Program Loads/second 12 fork_test 60.04 864 14.39041 1439.04 Task Creations/second 13 link_test 60.01 4723 78.70355 4958.32 Link/Unlink Pairs/second -- Mel Gorman Part-time Phd Student Java Applications Developer University of Limerick IBM Dublin Software Lab