From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <40365887.6020204@movaris.com> Date: Fri, 20 Feb 2004 10:57:11 -0800 From: Kirk True MIME-Version: 1.0 Subject: Re: LTP VM test slower under 2.6.3 than 2.4.20 References: <40363778.20900@movaris.com> <3800000.1077295177@[10.10.2.4]> In-Reply-To: <3800000.1077295177@[10.10.2.4]> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: "Martin J. Bligh" Cc: kernelnewbies , Linux-MM@kvack.org List-ID: Hi all, > A kernel profile might help. Here's the profiles comparing the two versions. I don't understand why no "do_page_fault" shows up under 2.4.20 or why "gunzip" does. Kirk ------------------------------------------------- 2.6.3: # readprofile -r;./mem01;readprofile -m /boot/System.map-2.6.3 \ >> captured_profile2.6.3 1446 poll_idle 24.9310 4 delay_tsc 0.1667 71 do_page_fault 0.0536 41 schedule 0.0238 13 __might_sleep 0.0637 1 prepare_to_wait 0.0068 1 put_files_struct 0.0042 3229 do_softirq 16.3081 1 run_timer_softirq 0.0022 4807 total 0.0262 2.4.20: # readprofile -r;./mem01;readprofile -m /boot/System.map-2.4.20 \ >> captured_profile2.4.20 347 gunzip 0.1559 8 acpi_restore_state_mem 0.0021 2 proc_dostring 0.0033 3 access_process_vm 0.0054 2 __mod_timer 0.0038 1 del_timer 0.0065 1 update_one_process 0.0036 1 notifier_chain_unregister 0.0052 365 total 0.0020 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: aart@kvack.org