From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S266034AbUBCQr0 (ORCPT ); Tue, 3 Feb 2004 11:47:26 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S266039AbUBCQr0 (ORCPT ); Tue, 3 Feb 2004 11:47:26 -0500 Received: from s4.uklinux.net ([80.84.72.14]:21938 "EHLO mail2.uklinux.net") by vger.kernel.org with ESMTP id S266034AbUBCQrN (ORCPT ); Tue, 3 Feb 2004 11:47:13 -0500 To: Andrew Morton Cc: linux-kernel@vger.kernel.org, Nick Piggin Subject: Re: 2.6.1 slower than 2.4, smp/scsi/sw-raid/reiserfs References: <87oesieb75.fsf@codematters.co.uk> <20040202194626.191cbb95.akpm@osdl.org> From: Philip Martin Date: Tue, 03 Feb 2004 16:46:14 +0000 In-Reply-To: <20040202194626.191cbb95.akpm@osdl.org> (Andrew Morton's message of "Mon, 2 Feb 2004 19:46:26 -0800") Message-ID: <87llnk2js9.fsf@codematters.co.uk> User-Agent: Gnus/5.1002 (Gnus v5.10.2) XEmacs/21.4 (Common Lisp, linux) 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 Andrew Morton writes: > Could you generate a kernel profile? Add `profile=1' to the kernel boot > command line and run: > > sudo readprofile -r > sudo readprofile -M10 > time make -j4 > readprofile -n -v -m /boot/System.map | sort -n +2 | tail -40 | tee ~/profile.txt >&2 > > on both 2.4 and 2.6? Make sure the System.map is appropriate to the > currently-running kernel. 2.4.24 239.24user 85.80system 2:50.73elapsed 190%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (1741932major+1948496minor)pagefaults 0swaps c013bcd8 fput 366 1.5000 c017c154 search_by_key 377 0.1010 c01242dc sys_rt_sigprocmask 399 0.6786 c022b388 strnlen_user 427 4.8523 c013210c kmem_cache_alloc 431 1.3814 c0134968 __alloc_pages 445 0.6825 c012d628 filemap_nopage 449 0.8909 c0133168 delta_nr_inactive_pages 452 5.6500 c0114478 flush_tlb_page 533 4.5948 c012c76c do_generic_file_read 536 0.4573 c012c18c unlock_page 608 5.8462 c013300c lru_cache_add 609 5.2500 c0135fa4 get_swaparea_info 622 1.0436 c012b514 set_page_dirty 630 4.0385 c0129b3c handle_mm_fault 655 3.5598 c0117a68 schedule 678 0.5168 c0119444 mm_init 695 3.4750 c01195dc copy_mm 705 0.9375 c0119d60 do_fork 822 0.4061 c012a894 find_vma 822 9.7857 c01089b0 system_call 865 15.4464 c0135094 free_page_and_swap_cache 899 17.2885 c0145050 link_path_walk 977 0.3972 c01284a0 __free_pte 1016 14.1111 c012c2d8 __find_get_page 1032 16.1250 c0128500 clear_page_tables 1112 4.9643 c014e514 d_lookup 1131 3.9824 c011de3c exit_notify 1216 1.7471 c0134290 __free_pages_ok 1357 1.9956 c012ce8c file_read_actor 1515 10.8214 c0134538 rmqueue 2011 3.3970 c0134c7c __free_pages 2122 66.3125 c012999c do_no_page 2849 6.8486 c0116a3c do_page_fault 3996 3.3922 c01285e0 copy_page_range 4671 10.4263 c01287a0 zap_page_range 5395 6.1029 c01298bc do_anonymous_page 6867 30.6562 c0129364 do_wp_page 20003 37.8845 c0106d60 default_idle 66782 1284.2692 00000000 total 154891 0.1278 2.6.1 248.82user 122.01system 3:37.24elapsed 170%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (474major+3768844minor)pagefaults 0swaps c011e450 mm_init 441 1.8375 c0114658 sched_clock 452 3.7667 c0108ac8 copy_thread 462 0.8431 c010a79c syscall_call 471 42.8182 c010b1e0 error_code 477 8.5179 c0127a1c del_timer_sync 492 3.7273 c01229e0 wait_task_zombie 535 1.1239 c0121970 put_files_struct 556 2.8958 c010c570 handle_IRQ_event 621 7.0568 c011fbe0 do_fork 642 1.6895 c0128d18 flush_signal_handlers 661 9.7206 c0123ec0 do_softirq 675 3.3088 c011add4 wake_up_forked_process 721 1.7672 c0110d1c old_mmap 866 2.6728 c0122d78 sys_wait4 889 1.5223 c012c638 sys_rt_sigaction 905 3.7090 c01168b8 flush_tlb_mm 1020 6.8919 c012b0a4 get_signal_to_deliver 1374 1.4494 c0123e38 current_kernel_time 1555 22.8676 c011afc8 schedule_tail 1636 9.0889 c01223e8 do_exit 1719 1.7613 c011df4f .text.lock.sched 2228 7.7093 c012b560 sys_rt_sigprocmask 2439 7.0901 c012c0a0 do_sigaction 2709 4.0074 c011e3c8 dup_task_struct 3056 22.4706 c011de6c __preempt_spin_lock 3096 38.7000 c011ec08 copy_files 3133 3.5602 c012b474 sigprocmask 3433 14.5466 c011c2e0 __wake_up 3495 45.9868 c0121d58 exit_notify 3945 2.3482 c0121150 release_task 4053 7.3960 c011bbf0 schedule 6904 4.3150 c011694c flush_tlb_page 7057 44.1063 c011e6d4 copy_mm 7931 7.6851 c010a770 system_call 8361 190.0227 c011efe0 copy_process 8654 2.8171 c0119588 pte_alloc_one 15888 248.2500 c01199b8 do_page_fault 44374 37.2265 c01086b0 default_idle 739276 14216.8462 00000000 total 896883 5.5028 -- Philip Martin