On Thu, Mar 01, 2007 at 03:47:17PM +0100, Ingo Molnar ([EMAIL PROTECTED]) wrote: > > * Evgeniy Polyakov <[EMAIL PROTECTED]> wrote: > > > CPU: AMD64 processors, speed 2210.08 MHz (estimated) > > Counted CPU_CLK_UNHALTED events (Cycles outside of halt state) with a unit > > mask of 0x00 (No unit mask) count 100000 > > samples % symbol name > > 195750 67.3097 cpu_idle > > 14111 4.8521 enter_idle > > 4979 1.7121 IRQ0x51_interrupt > > 4765 1.6385 tcp_v4_rcv > > the pretty much only meaningful way to measure this is to: > > - start a really long 'ab' testrun. Something like "ab -c 8000 -t 600". > - let the system get into 'steady state': i.e. CPU load at 100% > - reset the oprofile counters, then start an oprofile run for 60 > seconds. > - stop the oprofile run. > - stop the test. > > this way there wont be that many 'cpu_idle' entries in your profiles, > and the profiles between the two event delivery mechanisms will be > directly comparable.
They are there, since ab runs only 50k requests. If I change it to something noticebly more than 50/80k, ab crashes: # ab -c8000 -t 600 -n800000000 http://192.168.0.48/ This is ApacheBench, Version 2.0.40-dev <$Revision: 1.146 $> apache-2.0 Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/ Copyright 2006 The Apache Software Foundation, http://www.apache.org/ Benchmarking 192.168.0.48 (be patient) Segmentation fault Are there any other tool suitable for such loads? I only tested httperf (which is worse, since it uses poll/select) and 'ab'. Btw, host machine runs 100% too, so it is possible that client side is broken (too). > > In that tests I got epoll perf about 4400 req/s, kevent was about > > 5300. > > So we are now up to epoll being 83% of kevent's performance - while the > noise of numbers seen today alone is around 100% ... Could you update > the files two URLs that you posted before, with the code that you used > for the above numbers: And in a couple of moments I resent profile with 6100 r/s, and now attached with 6300. > http://tservice.net.ru/~s0mbre/archive/kevent/evserver_epoll.c > http://tservice.net.ru/~s0mbre/archive/kevent/evserver_kevent.c Plus http://tservice.net.ru/~s0mbre/archive/kevent/evserver_common.c which contains common request handling function > thanks, > > Ingo -- Evgeniy Polyakov
CPU: AMD64 processors, speed 2210.08 MHz (estimated) Counted CPU_CLK_UNHALTED events (Cycles outside of halt state) with a unit mask of 0x00 (No unit mask) count 100000 samples % symbol name 168753 65.1189 cpu_idle 12451 4.8046 enter_idle 4814 1.8576 tcp_v4_rcv 3980 1.5358 IRQ0x51_interrupt 3142 1.2124 tcp_ack 2738 1.0565 kmem_cache_free 2346 0.9053 kfree 2341 0.9034 memset_c 1927 0.7436 csum_partial_copy_generic 1723 0.6649 ip_route_input 1650 0.6367 dev_queue_xmit 1452 0.5603 ip_output 1416 0.5464 handle_IRQ_event 1335 0.5152 ip_rcv 1326 0.5117 tcp_rcv_state_process 1069 0.4125 schedule 960 0.3704 __do_softirq 943 0.3639 tcp_sendmsg 915 0.3531 ip_queue_xmit 907 0.3500 tcp_v4_do_rcv 897 0.3461 fget 894 0.3450 system_call 890 0.3434 csum_partial 877 0.3384 tcp_transmit_skb 845 0.3261 netif_receive_skb 822 0.3172 ip_local_deliver 812 0.3133 kmem_cache_alloc 788 0.3041 local_bh_enable 773 0.2983 __alloc_skb 771 0.2975 kfree_skbmem 764 0.2948 __d_lookup 757 0.2921 __tcp_push_pending_frames 734 0.2832 pfifo_fast_enqueue 720 0.2778 copy_user_generic_string 627 0.2419 net_rx_action 603 0.2327 pfifo_fast_dequeue 586 0.2261 ret_from_intr 562 0.2169 __link_path_walk 561 0.2165 sock_wfree 549 0.2118 __fput 547 0.2111 __kfree_skb 543 0.2095 get_unused_fd 534 0.2061 number 527 0.2034 sysret_check 516 0.1991 preempt_schedule 508 0.1960 skb_clone 496 0.1914 tcp_parse_options 487 0.1879 _atomic_dec_and_lock 470 0.1814 tcp_poll 469 0.1810 __ip_route_output_key 466 0.1798 rt_hash_code 464 0.1790 tcp_recvmsg 421 0.1625 dput 420 0.1621 tcp_rcv_established 412 0.1590 __tcp_select_window 407 0.1571 exit_idle 394 0.1520 rb_erase 381 0.1470 sys_close 375 0.1447 __mod_timer 365 0.1408 d_alloc 363 0.1401 mask_and_ack_8259A 335 0.1293 lock_timer_base 315 0.1216 cache_alloc_refill 307 0.1185 ret_from_sys_call 300 0.1158 do_path_lookup 299 0.1154 eth_type_trans 298 0.1150 find_next_zero_bit 294 0.1134 tcp_data_queue 286 0.1104 dentry_iput 285 0.1100 ip_append_data 263 0.1015 thread_return 257 0.0992 __dentry_open 255 0.0984 sock_recvmsg 255 0.0984 tcp_rtt_estimator 252 0.0972 sys_fcntl 250 0.0965 tcp_current_mss 248 0.0957 sk_stream_mem_schedule 240 0.0926 call_softirq 233 0.0899 sys_recvfrom 229 0.0884 cache_grow 221 0.0853 vsnprintf 215 0.0830 tcp_send_fin 214 0.0826 do_generic_mapping_read 213 0.0822 call_rcu 213 0.0822 common_interrupt 203 0.0783 do_lookup 196 0.0756 inotify_dentry_parent_queue_event 191 0.0737 memcpy_c 188 0.0725 filp_close 180 0.0695 release_sock 180 0.0695 sock_def_readable 178 0.0687 get_page_from_freelist 177 0.0683 do_sys_open 174 0.0671 restore_args 172 0.0664 strncpy_from_user 167 0.0644 fget_light 162 0.0625 clear_inode 161 0.0621 link_path_walk 159 0.0614 generic_drop_inode 157 0.0606 get_empty_filp 156 0.0602 __skb_checksum_complete 153 0.0590 del_timer 152 0.0587 update_send_head 151 0.0583 percpu_counter_mod 150 0.0579 current_fs_time 150 0.0579 schedule_timeout 150 0.0579 skb_checksum 149 0.0575 fd_install 145 0.0560 sock_close 143 0.0552 try_to_wake_up 142 0.0548 generic_permission 135 0.0521 __put_unused_fd 133 0.0513 new_inode 132 0.0509 half_md4_transform 131 0.0506 alloc_inode 130 0.0502 bictcp_cong_avoid 130 0.0502 memcmp 127 0.0490 tcp_init_tso_segs 126 0.0486 tcp_sync_mss 125 0.0482 __do_page_cache_readahead 125 0.0482 find_get_page 123 0.0475 lookup_mnt 117 0.0451 rb_insert_color 114 0.0440 tcp_v4_send_check 112 0.0432 mod_timer 109 0.0421 page_cache_readahead 101 0.0390 __path_lookup_intent_open 100 0.0386 __wake_up_bit 100 0.0386 may_open 100 0.0386 tcp_snd_test 97 0.0374 tcp_check_space 96 0.0370 expand_files 96 0.0370 skb_copy_datagram_iovec 95 0.0367 getname 95 0.0367 igrab 94 0.0363 open_namei 93 0.0359 groups_search 92 0.0355 dnotify_flush 91 0.0351 locks_remove_posix 91 0.0351 memmove 90 0.0347 sk_reset_timer 89 0.0343 tcp_send_ack 88 0.0340 copy_page_c 88 0.0340 tcp_select_initial_window 87 0.0336 sock_common_recvmsg 85 0.0328 sock_release 83 0.0320 IRQ0x20_interrupt 83 0.0320 file_free_rcu 80 0.0309 rw_verify_area 79 0.0305 d_instantiate 79 0.0305 permission 79 0.0305 put_page 77 0.0297 cond_resched 77 0.0297 get_task_mm 77 0.0297 touch_atime 75 0.0289 __follow_mount 75 0.0289 inotify_inode_queue_event 74 0.0286 file_move 73 0.0282 copy_to_user 71 0.0274 tcp_v4_tw_remember_stamp 69 0.0266 wake_up_inode 65 0.0251 prepare_to_wait 65 0.0251 sockfd_lookup 65 0.0251 tcp_event_data_recv 64 0.0247 file_kill 64 0.0247 fput 62 0.0239 __handle_mm_fault 62 0.0239 tcp_setsockopt 61 0.0235 sock_sendmsg 60 0.0232 __wake_up 59 0.0228 page_fault 57 0.0220 locks_remove_flock 54 0.0208 sk_stream_rfree 54 0.0208 sprintf 53 0.0205 inet_sendmsg 53 0.0205 retint_kernel 51 0.0197 iret_label 51 0.0197 tcp_cwnd_validate 49 0.0189 tcp_rcv_space_adjust 48 0.0185 inode_init_once 48 0.0185 mutex_unlock 45 0.0174 finish_wait 45 0.0174 mntput_no_expire 44 0.0170 __delay 44 0.0170 __tcp_ack_snd_check 43 0.0166 inet_sock_destruct 42 0.0162 try_to_del_timer_sync 41 0.0158 free_hot_cold_page 41 0.0158 memset 40 0.0154 __rb_rotate_left 40 0.0154 init_once 40 0.0154 sys_open 40 0.0154 tcp_unhash 39 0.0150 generic_file_open 39 0.0150 tcp_cong_avoid 38 0.0147 __lookup_mnt 38 0.0147 bit_waitqueue 36 0.0139 clear_page_c 36 0.0139 iput 33 0.0127 in_group_p 33 0.0127 inet_sk_rebuild_header 33 0.0127 sock_fasync 33 0.0127 tcp_init_cwnd 32 0.0123 memcpy_toiovec 32 0.0123 sk_stop_timer 32 0.0123 unmap_vmas 31 0.0120 blockable_page_cache_readahead 30 0.0116 _spin_lock_bh 30 0.0116 inet_getname 29 0.0112 __put_user_8 28 0.0108 copy_from_user 27 0.0104 do_filp_open 26 0.0100 tcp_v4_destroy_sock 25 0.0096 __alloc_pages 24 0.0093 apic_timer_interrupt 24 0.0093 do_page_fault 24 0.0093 file_ra_state_init 24 0.0093 hrtimer_run_queues 24 0.0093 vfs_permission 23 0.0089 tcp_slow_start 23 0.0089 zone_watermark_ok 22 0.0085 mutex_lock 21 0.0081 destroy_inode 21 0.0081 init_timer 21 0.0081 invalidate_inode_buffers 21 0.0081 sk_alloc 19 0.0073 exit_intr 16 0.0062 copy_page_range 15 0.0058 find_vma 14 0.0054 retint_swapgs 14 0.0054 wake_up_bit 13 0.0050 __down_read 12 0.0046 do_wp_page 12 0.0046 mark_page_accessed 11 0.0042 __get_user_4 11 0.0042 __tcp_checksum_complete_user 10 0.0039 vm_normal_page 9 0.0035 __up_read 8 0.0031 rcu_start_batch 8 0.0031 retint_restore_args 8 0.0031 timespec_trunc 7 0.0027 __find_get_block 7 0.0027 error_exit 7 0.0027 flush_tlb_page 6 0.0023 _write_lock_bh 6 0.0023 copy_process 6 0.0023 free_hot_page 6 0.0023 inode_has_buffers 6 0.0023 kmem_flagcheck 6 0.0023 retint_check 5 0.0019 __rb_rotate_right 5 0.0019 del_timer_sync 5 0.0019 nameidata_to_filp 4 0.0015 __down_read_trylock 4 0.0015 __getblk 4 0.0015 __mutex_init 4 0.0015 __set_page_dirty_nobuffers 4 0.0015 _read_lock_irqsave 4 0.0015 do_mmap_pgoff 4 0.0015 error_sti 4 0.0015 free_pgd_range 4 0.0015 load_elf_binary 4 0.0015 mmput 3 0.0012 __iget 3 0.0012 _spin_lock_irqsave 3 0.0012 bio_endio 3 0.0012 copy_strings 3 0.0012 cpuset_update_task_memory_state 3 0.0012 d_lookup 3 0.0012 exit_itimers 3 0.0012 filemap_nopage 3 0.0012 find_vma_prepare 3 0.0012 free_pages 3 0.0012 generic_fillattr 3 0.0012 generic_make_request 3 0.0012 memcpy 3 0.0012 prio_tree_insert 3 0.0012 put_unused_fd 3 0.0012 run_local_timers 3 0.0012 unmap_region 3 0.0012 vma_prio_tree_remove 2 7.7e-04 __clear_user 2 7.7e-04 __find_get_block_slow 2 7.7e-04 __strnlen_user 2 7.7e-04 __vm_enough_memory 2 7.7e-04 add_to_page_cache 2 7.7e-04 add_wait_queue 2 7.7e-04 alloc_pages_current 2 7.7e-04 anon_vma_prepare 2 7.7e-04 dnotify_parent 2 7.7e-04 do_exit 2 7.7e-04 do_munmap 2 7.7e-04 do_select 2 7.7e-04 dup_fd 2 7.7e-04 exit_mmap 2 7.7e-04 find_mergeable_anon_vma 2 7.7e-04 free_pgtables 2 7.7e-04 lru_cache_add_active 2 7.7e-04 mempool_free 2 7.7e-04 page_add_file_rmap 2 7.7e-04 page_remove_rmap 2 7.7e-04 page_waitqueue 2 7.7e-04 path_release 2 7.7e-04 prio_tree_replace 2 7.7e-04 pty_chars_in_buffer 2 7.7e-04 remove_vma 2 7.7e-04 retint_with_reschedule 2 7.7e-04 run_workqueue 2 7.7e-04 seq_puts 2 7.7e-04 split_vma 2 7.7e-04 sys_mmap 2 7.7e-04 sys_mprotect 2 7.7e-04 sys_rt_sigprocmask 2 7.7e-04 truncate_inode_pages_range 2 7.7e-04 vfs_lstat_fd 2 7.7e-04 vm_acct_memory 2 7.7e-04 vma_adjust 2 7.7e-04 vma_link 1 3.9e-04 __block_prepare_write 1 3.9e-04 __bread 1 3.9e-04 __d_path 1 3.9e-04 __down_write 1 3.9e-04 __down_write_nested 1 3.9e-04 __end_that_request_first 1 3.9e-04 __free_pages 1 3.9e-04 __generic_file_aio_write_nolock 1 3.9e-04 __make_request 1 3.9e-04 __page_set_anon_rmap 1 3.9e-04 __pagevec_lru_add_active 1 3.9e-04 __put_user_4 1 3.9e-04 __remove_shared_vm_struct 1 3.9e-04 __up_write 1 3.9e-04 __vma_link_rb 1 3.9e-04 _read_lock_bh 1 3.9e-04 activate_page 1 3.9e-04 anon_vma_unlink 1 3.9e-04 block_write_full_page 1 3.9e-04 cap_bprm_apply_creds 1 3.9e-04 cap_vm_enough_memory 1 3.9e-04 clear_page_dirty_for_io 1 3.9e-04 cond_resched_lock 1 3.9e-04 cp_new_stat 1 3.9e-04 create_empty_buffers 1 3.9e-04 dentry_unhash 1 3.9e-04 do_brk 1 3.9e-04 do_mpage_readpage 1 3.9e-04 do_mremap 1 3.9e-04 do_sigaction 1 3.9e-04 do_wait 1 3.9e-04 drop_buffers 1 3.9e-04 eligible_child 1 3.9e-04 exit_sem 1 3.9e-04 file_read_actor 1 3.9e-04 filldir64 1 3.9e-04 flush_signal_handlers 1 3.9e-04 generic_block_bmap 1 3.9e-04 generic_file_llseek 1 3.9e-04 generic_file_mmap 1 3.9e-04 get_index 1 3.9e-04 get_signal_to_deliver 1 3.9e-04 get_stack 1 3.9e-04 get_unmapped_area 1 3.9e-04 get_vma_policy 1 3.9e-04 init_request_from_bio 1 3.9e-04 inode_setattr 1 3.9e-04 is_bad_inode 1 3.9e-04 kref_put 1 3.9e-04 lru_add_drain 1 3.9e-04 may_delete 1 3.9e-04 mm_release 1 3.9e-04 n_tty_ioctl 1 3.9e-04 nr_blockdev_pages 1 3.9e-04 page_add_new_anon_rmap 1 3.9e-04 pipe_poll 1 3.9e-04 preempt_schedule_irq 1 3.9e-04 proc_lookup 1 3.9e-04 ptregscall_common 1 3.9e-04 put_files_struct 1 3.9e-04 radix_tree_tag_clear 1 3.9e-04 rb_prev 1 3.9e-04 recalc_bh_state 1 3.9e-04 release_pages 1 3.9e-04 sched_exec 1 3.9e-04 sched_fork 1 3.9e-04 seq_escape 1 3.9e-04 set_close_on_exec 1 3.9e-04 set_fs_pwd 1 3.9e-04 set_personality_64bit 1 3.9e-04 shrink_dcache_parent 1 3.9e-04 sock_map_fd 1 3.9e-04 strchr 1 3.9e-04 submit_bio 1 3.9e-04 sys_dup2 1 3.9e-04 sys_faccessat 1 3.9e-04 sys_munmap 1 3.9e-04 sys_rt_sigaction 1 3.9e-04 tty_write 1 3.9e-04 unlink_file_vma 1 3.9e-04 unlock_page 1 3.9e-04 vfs_read 1 3.9e-04 vfs_readdir 1 3.9e-04 vma_merge 1 3.9e-04 vma_prio_tree_insert 1 3.9e-04 wake_up_new_task 1 3.9e-04 writeback_inodes 1 3.9e-04 zonelist_policy
