Re: high system cpu load during intense disk i/o

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Andrew Morton wrote:
On Mon, 06 Aug 2007 16:20:30 +0200 Dimitrios Apostolou <[email protected]> wrote:

Andrew Morton wrote:
On Sun, 5 Aug 2007 19:03:12 +0300 Dimitrios Apostolou <[email protected]> wrote:

was my report so complicated?
We're bad.

Seems that your context switch rate when running two instances of
badblocks against two different disks went batshit insane.  It doesn't
happen here.

Please capture the `vmstat 1' output while running the problematic
workload.

The oom-killing could have been unrelated to the CPU load problem.  iirc
badblocks uses a lot of memory, so it might have been genuine.  Keep an eye
on the /proc/meminfo output and send the kernel dmesg output from the
oom-killing event.
Please see the attached files. Unfortunately I don't see any useful info in them:
	*_before: before running any badblocks process
*_while: while running badblocks process, but without any cron job having kicked in
	*_bad: 5 minutes later that some cron jobs kicked in

About the OOM killer, indeed I believe that it is unrelated. It started killing after about 2 days, that hundreds of processes were stuck as running and taking up memory, so I suppose the 256 MB RAM were truly filled. I just mentioned it because its behaviour is completely non-helpful. It doesn't touch the badblocks process, it rarely touches the stuck as running cron jobs, but it kills other irrelevant processes. If you still want the killing logs, tell me and I'll search for them.

ah.  Your context-switch rate during the dual-badblocks run is not high at
all.

I suspect I was fooled by the oprofile output, which showed tremendous
amounts of load in schedule() and switch_to().  The percentages which
opreport shows are the percentage of non-halted CPU time.  So if you have a
function in the kernel which is using 1% of the total CPU, and the CPU is
halted for 95% of the time, it appears that the function is taking 20% of
CPU!

The fix for that is to boot with the "idle=poll" boot parameter, to make
the CPU spin when it has nothing else to do.

I'm attaching the new oprofile output. I can't see any difference however. :-s


Dimitris


Mon Aug  6 21:46:59 EEST 2007
+ opcontrol --vmlinux=/usr/src/linux-2.6.22-ARCH/vmlinux
+ opcontrol --start
Using default event: CPU_CLK_UNHALTED:100000:0:1:1
Daemon started.
Profiler running.
+ sleep 5
+ opcontrol --shutdown
Stopping profiling.
Killing daemon.
+ echo

+ echo

+ echo

+ opreport
CPU: PIII, speed 798.025 MHz (estimated)
Counted CPU_CLK_UNHALTED events (clocks processor is not halted) with a unit mask of 0x00 (No unit mask) count 100000
CPU_CLK_UNHALT...|
  samples|      %|
------------------
     7917 57.2658 vmlinux
     2204 15.9421 libc-2.6.so
      958  6.9295 libpython2.5.so.1.0
      815  5.8951 ide_core
      773  5.5913 perl
      242  1.7505 ld-2.6.so
      216  1.5624 mpop
      204  1.4756 bash
      121  0.8752 libgnutls.so.13.3.0
       64  0.4629 badblocks
	CPU_CLK_UNHALT...|
	  samples|      %|
	------------------
	       48 75.0000 badblocks
	       10 15.6250 anon (tgid:4338 range:0xb7f6c000-0xb7f6d000)
	        6  9.3750 anon (tgid:4339 range:0xb7f64000-0xb7f65000)
       46  0.3327 ISO8859-1.so
       37  0.2676 ext3
       34  0.2459 imap-login
	CPU_CLK_UNHALT...|
	  samples|      %|
	------------------
	       31 91.1765 imap-login
	        1  2.9412 anon (tgid:3989 range:0xb7f80000-0xb7f81000)
	        1  2.9412 anon (tgid:3990 range:0xb7f72000-0xb7f73000)
	        1  2.9412 anon (tgid:4332 range:0xb7fd6000-0xb7fd7000)
       33  0.2387 libext2fs.so.2.4
       24  0.1736 jbd
       24  0.1736 libpthread-2.6.so
       21  0.1519 gawk
       15  0.1085 oprofile
       13  0.0940 libcrypto.so.0.9.8
       12  0.0868 ide_disk
       11  0.0796 skge
        7  0.0506 sshd
        6  0.0434 dovecot-auth
	CPU_CLK_UNHALT...|
	  samples|      %|
	------------------
	        5 83.3333 dovecot-auth
	        1 16.6667 anon (tgid:3971 range:0xb7f8c000-0xb7f8d000)
        4  0.0289 libnetsnmp.so.15.0.0
        4  0.0289 libnetsnmpmibs.so.15.0.0
        4  0.0289 imap
        4  0.0289 dovecot
        3  0.0217 grep
        3  0.0217 reiserfs
        3  0.0217 locale-archive
        1  0.0072 libdl-2.6.so
        1  0.0072 init
        1  0.0072 screen-4.0.3
+ echo

+ echo

+ echo

+ opreport -l /usr/src/linux-2.6.22-ARCH/vmlinux
CPU: PIII, speed 798.025 MHz (estimated)
Counted CPU_CLK_UNHALTED events (clocks processor is not halted) with a unit mask of 0x00 (No unit mask) count 100000
samples  %        symbol name
2477     31.2871  __switch_to
1625     20.5255  schedule
246       3.1072  mask_and_ack_8259A
222       2.8041  __blockdev_direct_IO
147       1.8568  follow_page
107       1.3515  put_page
106       1.3389  do_wp_page
91        1.1494  native_load_tls
88        1.1115  __bio_add_page
80        1.0105  delay_tsc
63        0.7958  __handle_mm_fault
50        0.6316  submit_page_section
49        0.6189  get_page_from_freelist
48        0.6063  dio_bio_add_page
45        0.5684  dequeue_task
41        0.5179  get_user_pages
40        0.5052  bio_alloc_bioset
39        0.4926  enable_8259A_irq
38        0.4800  dio_send_cur_page
38        0.4800  page_address
38        0.4800  sysenter_past_esp
37        0.4673  dio_get_page
37        0.4673  find_get_page
36        0.4547  bio_add_page
36        0.4547  kmem_cache_alloc
36        0.4547  unmap_vmas
35        0.4421  kmem_cache_free
34        0.4295  blk_rq_map_sg
33        0.4168  blk_recount_segments
32        0.4042  do_page_fault
31        0.3916  generic_file_direct_write
30        0.3789  __generic_file_aio_write_nolock
30        0.3789  vm_normal_page
28        0.3537  __link_path_walk
28        0.3537  __mutex_lock_slowpath
26        0.3284  irq_entries_start
25        0.3158  filemap_nopage
25        0.3158  vfs_write
23        0.2905  find_vma
22        0.2779  __d_lookup
22        0.2779  dio_bio_complete
22        0.2779  mark_page_accessed
21        0.2653  add_timer_randomness
21        0.2653  max_block
21        0.2653  page_fault
19        0.2400  restore_all
18        0.2274  __add_entropy_words
18        0.2274  preempt_schedule
17        0.2147  __copy_to_user_ll
17        0.2147  __generic_unplug_device
17        0.2147  do_sys_poll
17        0.2147  fget_light
17        0.2147  math_state_restore
16        0.2021  __mod_timer
16        0.2021  generic_file_direct_IO
16        0.2021  preempt_schedule_irq
15        0.1895  block_llseek
15        0.1895  do_sync_write
14        0.1768  current_fs_time
14        0.1768  do_generic_mapping_read
14        0.1768  mempool_free
14        0.1768  native_flush_tlb_single
14        0.1768  radix_tree_lookup
14        0.1768  rw_verify_area
13        0.1642  __alloc_pages
13        0.1642  __make_request
13        0.1642  _spin_lock_irqsave
13        0.1642  cond_resched
12        0.1516  cfq_completed_request
12        0.1516  strnlen_user
11        0.1389  __mutex_unlock_slowpath
11        0.1389  do_lookup
11        0.1389  generic_make_request
11        0.1389  get_request
11        0.1389  restore_nocheck
10        0.1263  blkdev_direct_IO
10        0.1263  load_elf_binary
10        0.1263  unix_poll
9         0.1137  cfq_insert_request
9         0.1137  cfq_set_request
9         0.1137  copy_page_range
9         0.1137  do_mmap_pgoff
9         0.1137  elv_insert
9         0.1137  generic_file_aio_write_nolock
9         0.1137  generic_permission
9         0.1137  recalc_task_prio
8         0.1010  blkdev_get_blocks
8         0.1010  cache_reap
8         0.1010  dio_new_bio
8         0.1010  file_update_time
8         0.1010  sys_llseek
8         0.1010  vsnprintf
7         0.0884  bio_put
7         0.0884  blk_backing_dev_unplug
7         0.0884  cfq_dispatch_requests
7         0.0884  copy_process
7         0.0884  device_not_available
7         0.0884  disk_round_stats
7         0.0884  elv_queue_empty
7         0.0884  free_block
7         0.0884  generic_unplug_device
7         0.0884  hrtimer_interrupt
7         0.0884  kmap_atomic_prot
7         0.0884  mutex_remove_waiter
7         0.0884  need_resched
7         0.0884  page_remove_rmap
7         0.0884  permission
6         0.0758  __blk_put_request
6         0.0758  __copy_from_user_ll
6         0.0758  __copy_user_intel
6         0.0758  __end_that_request_first
6         0.0758  __find_get_block_slow
6         0.0758  bio_init
6         0.0758  blk_remove_plug
6         0.0758  cfq_may_queue
6         0.0758  dio_cleanup
6         0.0758  dio_complete
6         0.0758  dput
6         0.0758  getname
6         0.0758  inotify_inode_queue_event
6         0.0758  kfree
6         0.0758  memcpy
6         0.0758  mempool_alloc
6         0.0758  path_walk
6         0.0758  rb_erase
6         0.0758  read_tsc
6         0.0758  task_rq_lock
6         0.0758  try_to_wake_up
6         0.0758  vfs_llseek
5         0.0632  __const_udelay
5         0.0632  __fput
5         0.0632  blk_plug_device
5         0.0632  cfq_remove_request
5         0.0632  copy_strings
5         0.0632  current_io_context
5         0.0632  debug_mutex_add_waiter
5         0.0632  dnotify_parent
5         0.0632  do_IRQ
5         0.0632  do_filp_open
5         0.0632  do_path_lookup
5         0.0632  drain_array
5         0.0632  elv_rqhash_add
5         0.0632  free_poll_entry
5         0.0632  generic_segment_checks
5         0.0632  handle_level_irq
5         0.0632  idle_cpu
5         0.0632  init_request_from_bio
5         0.0632  io_schedule
5         0.0632  ip_append_data
5         0.0632  note_interrupt
5         0.0632  proc_sys_lookup_table_one
5         0.0632  sched_clock
5         0.0632  sys_write
5         0.0632  up_read
4         0.0505  __dentry_open
4         0.0505  __freed_request
4         0.0505  __pagevec_lru_add_active
4         0.0505  _atomic_dec_and_lock
4         0.0505  bdev_read_only
4         0.0505  cfq_queue_empty
4         0.0505  copy_to_user
4         0.0505  debug_mutex_free_waiter
4         0.0505  do_munmap
4         0.0505  do_sync_read
4         0.0505  do_wait
4         0.0505  dummy_inode_permission
4         0.0505  elv_completed_request
4         0.0505  end_that_request_last
4         0.0505  filemap_write_and_wait
4         0.0505  find_extend_vma
4         0.0505  find_vma_prev
4         0.0505  generic_file_aio_read
4         0.0505  get_empty_filp
4         0.0505  get_request_wait
4         0.0505  hweight32
4         0.0505  internal_add_timer
4         0.0505  irq_exit
4         0.0505  native_read_tsc
4         0.0505  number
4         0.0505  poll_freewait
4         0.0505  proc_lookup
4         0.0505  setup_arg_pages
4         0.0505  should_remove_suid
4         0.0505  sock_poll
4         0.0505  submit_bio
4         0.0505  tick_sched_timer
4         0.0505  unmap_region
4         0.0505  vma_adjust
3         0.0379  __atomic_notifier_call_chain
3         0.0379  __do_page_cache_readahead
3         0.0379  __elv_add_request
3         0.0379  __find_get_block
3         0.0379  __mark_inode_dirty
3         0.0379  __pte_alloc
3         0.0379  anon_vma_prepare
3         0.0379  anon_vma_unlink
3         0.0379  bio_endio
3         0.0379  bit_waitqueue
3         0.0379  call_rcu
3         0.0379  cfq_init_prio_data
3         0.0379  cfq_put_queue
3         0.0379  cfq_service_tree_add
3         0.0379  clear_bdi_congested
3         0.0379  common_interrupt
3         0.0379  credit_entropy_store
3         0.0379  deactivate_task
3         0.0379  debug_mutex_lock_common
3         0.0379  debug_mutex_unlock
3         0.0379  del_timer
3         0.0379  down_read_trylock
3         0.0379  dummy_inode_getattr
3         0.0379  elv_dispatch_sort
3         0.0379  elv_may_queue
3         0.0379  elv_put_request
3         0.0379  elv_set_request
3         0.0379  enqueue_task
3         0.0379  error_code
3         0.0379  flush_old_exec
3         0.0379  free_hot_cold_page
3         0.0379  generic_fillattr
3         0.0379  kmem_cache_zalloc
3         0.0379  link_path_walk
3         0.0379  lock_timer_base
3         0.0379  locks_remove_flock
3         0.0379  may_expand_vm
3         0.0379  native_load_esp0
3         0.0379  open_namei
3         0.0379  path_lookup_open
3         0.0379  pipe_poll
3         0.0379  proc_flush_task
3         0.0379  release_vm86_irqs
3         0.0379  remove_vma
3         0.0379  rq_init
3         0.0379  sock_alloc_send_skb
3         0.0379  strncpy_from_user
3         0.0379  sys_mmap2
3         0.0379  sys_mprotect
3         0.0379  touch_atime
3         0.0379  vfs_read
3         0.0379  vm_acct_memory
3         0.0379  vm_stat_account
3         0.0379  vma_link
2         0.0253  I_BDEV
2         0.0253  __dec_zone_state
2         0.0253  __group_complete_signal
2         0.0253  __inc_zone_state
2         0.0253  __mutex_lock_interruptible_slowpath
2         0.0253  __path_lookup_intent_open
2         0.0253  __pollwait
2         0.0253  __rb_rotate_right
2         0.0253  __vm_enough_memory
2         0.0253  __vma_link_rb
2         0.0253  __wake_up
2         0.0253  __wake_up_bit
2         0.0253  alloc_inode
2         0.0253  anon_vma_ctor
2         0.0253  bio_alloc
2         0.0253  bio_free
2         0.0253  bio_fs_destructor
2         0.0253  bio_get_nr_vecs
2         0.0253  bio_phys_segments
2         0.0253  blk_queue_bounce
2         0.0253  cache_alloc_refill
2         0.0253  check_pgt_cache
2         0.0253  debug_mutex_set_owner
2         0.0253  dio_bio_end_io
2         0.0253  dio_zero_block
2         0.0253  do_notify_parent
2         0.0253  do_notify_resume
2         0.0253  do_sys_open
2         0.0253  down_read
2         0.0253  dst_alloc
2         0.0253  effective_prio
2         0.0253  elv_dequeue_request
2         0.0253  elv_next_request
2         0.0253  file_free_rcu
2         0.0253  file_read_actor
2         0.0253  filp_close
2         0.0253  find_next_bit
2         0.0253  find_next_zero_bit
2         0.0253  find_vma_prepare
2         0.0253  flush_tlb_mm
2         0.0253  flush_tlb_page
2         0.0253  generic_file_mmap
2         0.0253  get_index
2         0.0253  get_unused_fd
2         0.0253  getnstimeofday
2         0.0253  handle_IRQ_event
2         0.0253  icmp_push_reply
2         0.0253  icmp_send
2         0.0253  kill_fasync
2         0.0253  kunmap_atomic
2         0.0253  lru_cache_add_active
2         0.0253  mntput_no_expire
2         0.0253  native_read_cr0
2         0.0253  notifier_call_chain
2         0.0253  ordered_bio_endio
2         0.0253  page_cache_readahead
2         0.0253  percpu_counter_mod
2         0.0253  poll_initwait
2         0.0253  profile_munmap
2         0.0253  put_filp
2         0.0253  put_io_context
2         0.0253  quicklist_trim
2         0.0253  radix_tree_gang_lookup_tag
2         0.0253  rb_insert_color
2         0.0253  remove_suid
2         0.0253  resume_userspace
2         0.0253  sched_balance_self
2         0.0253  seq_printf
2         0.0253  smp_apic_timer_interrupt
2         0.0253  sys_brk
2         0.0253  sys_fstat64
2         0.0253  sys_read
2         0.0253  sys_rt_sigaction
2         0.0253  sys_stat64
2         0.0253  system_call
2         0.0253  vma_merge
2         0.0253  work_notifysig
2         0.0253  zone_watermark_ok
1         0.0126  __activate_task
1         0.0126  __alloc_skb
1         0.0126  __blocking_notifier_call_chain
1         0.0126  __bread
1         0.0126  __delay
1         0.0126  __do_softirq
1         0.0126  __follow_mount
1         0.0126  __iget
1         0.0126  __ip_select_ident
1         0.0126  __put_user_4
1         0.0126  __rb_rotate_left
1         0.0126  __rcu_process_callbacks
1         0.0126  __rmqueue
1         0.0126  __sigqueue_alloc
1         0.0126  __sigqueue_free
1         0.0126  __sk_dst_check
1         0.0126  __tasklet_schedule
1         0.0126  __tcp_ack_snd_check
1         0.0126  __tcp_push_pending_frames
1         0.0126  __user_walk_fd
1         0.0126  __vma_link
1         0.0126  _read_lock_irqsave
1         0.0126  account_system_time
1         0.0126  account_user_time
1         0.0126  add_disk_randomness
1         0.0126  add_wait_queue
1         0.0126  all_vm_events
1         0.0126  alloc_buffer_head
1         0.0126  alloc_pid
1         0.0126  anon_pipe_buf_release
1         0.0126  anon_vma_link
1         0.0126  arch_setup_additional_pages
1         0.0126  bio_hw_segments
1         0.0126  blk_do_ordered
1         0.0126  blk_start_queueing
1         0.0126  blockable_page_cache_readahead
1         0.0126  blocking_notifier_call_chain
1         0.0126  bmap
1         0.0126  can_vma_merge_after
1         0.0126  cfq_add_rq_rb
1         0.0126  cfq_choose_req
1         0.0126  cfq_cic_rb_lookup
1         0.0126  cfq_rb_erase
1         0.0126  check_userspace
1         0.0126  copy_semundo
1         0.0126  core_sys_select
1         0.0126  cp_new_stat64
1         0.0126  csum_partial_copy_generic
1         0.0126  d_alloc
1         0.0126  dec_zone_page_state
1         0.0126  dequeue_signal
1         0.0126  devinet_ioctl
1         0.0126  do_fork
1         0.0126  do_group_exit
1         0.0126  do_sigaction
1         0.0126  drive_stat_acct
1         0.0126  dummy_capable
1         0.0126  dummy_file_alloc_security
1         0.0126  dummy_task_kill
1         0.0126  dummy_vm_enough_memory
1         0.0126  dup_fd
1         0.0126  elv_rb_add
1         0.0126  end_that_request_first
1         0.0126  exit_itimers
1         0.0126  fasync_helper
1         0.0126  fget
1         0.0126  file_kill
1         0.0126  file_move
1         0.0126  file_ra_state_init
1         0.0126  flush_sigqueue
1         0.0126  fn_hash_lookup
1         0.0126  fput
1         0.0126  free_page_and_swap_cache
1         0.0126  free_pgtables
1         0.0126  get_futex_key
1         0.0126  get_io_context
1         0.0126  get_task_mm
1         0.0126  hrtimer_try_to_cancel
1         0.0126  icmp_glue_bits
1         0.0126  ifind_fast
1         0.0126  inotify_dentry_parent_queue_event
1         0.0126  invalidate_inode_buffers
1         0.0126  ip_route_input
1         0.0126  irq_enter
1         0.0126  local_bh_enable_ip
1         0.0126  may_open
1         0.0126  mempool_alloc_slab
1         0.0126  mempool_free_slab
1         0.0126  n_tty_receive_buf
1         0.0126  native_apic_write
1         0.0126  native_set_pte_at
1         0.0126  open_exec
1         0.0126  opost
1         0.0126  page_add_file_rmap
1         0.0126  pipe_release
1         0.0126  pipe_write
1         0.0126  prio_tree_insert
1         0.0126  prio_tree_remove
1         0.0126  proc_sys_lookup_table
1         0.0126  profile_tick
1         0.0126  pty_chars_in_buffer
1         0.0126  put_tty_queue
1         0.0126  rb_first
1         0.0126  recalc_sigpending_tsk
1         0.0126  release_open_intent
1         0.0126  release_task
1         0.0126  restore_sigcontext
1         0.0126  ret_from_exception
1         0.0126  ret_from_intr
1         0.0126  scheduler_tick
1         0.0126  search_binary_handler
1         0.0126  secure_ip_id
1         0.0126  show_stat
1         0.0126  sigprocmask
1         0.0126  snprintf
1         0.0126  sock_fasync
1         0.0126  softlockup_tick
1         0.0126  special_mapping_nopage
1         0.0126  split_vma
1         0.0126  sys_access
1         0.0126  sys_clone
1         0.0126  sys_execve
1         0.0126  sys_futex
1         0.0126  sys_open
1         0.0126  sys_rt_sigprocmask
1         0.0126  syscall_exit
1         0.0126  sysctl_head_next
1         0.0126  task_running_tick
1         0.0126  tcp_poll
1         0.0126  tcp_rcv_space_adjust
1         0.0126  tcp_recvmsg
1         0.0126  tcp_transmit_skb
1         0.0126  test_set_page_writeback
1         0.0126  tick_do_update_jiffies64
1         0.0126  tick_program_event
1         0.0126  timespec_trunc
1         0.0126  try_to_del_timer_sync
1         0.0126  tty_ioctl
1         0.0126  tty_ldisc_ref_wait
1         0.0126  udp_flush_pending_frames
1         0.0126  unuse_table
1         0.0126  update_process_times
1         0.0126  update_wall_time
1         0.0126  vfs_stat_fd
1         0.0126  vma_prio_tree_remove
1         0.0126  wake_up_inode
1         0.0126  wake_up_new_task
1         0.0126  wake_up_process
1         0.0126  write_cache_pages
Mon Aug  6 21:38:04 EEST 2007
Using default event: CPU_CLK_UNHALTED:100000:0:1:1
Daemon started.
Profiler running.
Stopping profiling.
Killing daemon.



CPU: PIII, speed 798.025 MHz (estimated)
Counted CPU_CLK_UNHALTED events (clocks processor is not halted) with a unit mask of 0x00 (No unit mask) count 100000
CPU_CLK_UNHALT...|
  samples|      %|
------------------
    40131 97.6495 vmlinux
      318  0.7738 libc-2.6.so
      168  0.4088 oprofiled
	CPU_CLK_UNHALT...|
	  samples|      %|
	------------------
	      167 99.4048 oprofiled
	        1  0.5952 anon (tgid:4159 range:0xb7f55000-0xb7f56000)
      162  0.3942 bash
      133  0.3236 ld-2.6.so
       51  0.1241 oprofile
       49  0.1192 ISO8859-1.so
       33  0.0803 ext3
       20  0.0487 jbd
        5  0.0122 locale-archive
        4  0.0097 gawk
        4  0.0097 imap-login
        3  0.0073 grep
        3  0.0073 reiserfs
        2  0.0049 cat
        2  0.0049 libcrypto.so.0.9.8
        2  0.0049 dovecot-auth
        1  0.0024 ide_core
        1  0.0024 ide_disk
        1  0.0024 libncurses.so.5.6
        1  0.0024 which
        1  0.0024 libnetsnmp.so.15.0.0
        1  0.0024 libnetsnmpmibs.so.15.0.0
        1  0.0024 dovecot
	CPU_CLK_UNHALT...|
	  samples|      %|
	------------------
	        1 100.000 anon (tgid:3968 range:0xb7fa7000-0xb7fa8000)



CPU: PIII, speed 798.025 MHz (estimated)
Counted CPU_CLK_UNHALTED events (clocks processor is not halted) with a unit mask of 0x00 (No unit mask) count 100000
samples  %        symbol name
39019    97.2291  cpu_idle
263       0.6554  poll_idle
131       0.3264  quicklist_trim
92        0.2292  do_wp_page
50        0.1246  check_pgt_cache
44        0.1096  __handle_mm_fault
37        0.0922  get_page_from_freelist
31        0.0772  page_fault
21        0.0523  unmap_vmas
15        0.0374  __copy_to_user_ll
13        0.0324  filemap_nopage
12        0.0299  radix_tree_lookup
11        0.0274  copy_process
10        0.0249  __link_path_walk
10        0.0249  sysenter_past_esp
9         0.0224  do_page_fault
9         0.0224  find_get_page
8         0.0199  kmem_cache_free
6         0.0150  __d_lookup
6         0.0150  __find_get_block
6         0.0150  page_address
5         0.0125  _atomic_dec_and_lock
5         0.0125  do_mmap_pgoff
5         0.0125  free_hot_cold_page
5         0.0125  kmem_cache_alloc
5         0.0125  load_elf_binary
5         0.0125  strnlen_user
4         0.0100  __wake_up_bit
4         0.0100  copy_page_range
4         0.0100  d_alloc
4         0.0100  error_code
4         0.0100  find_vma
4         0.0100  flush_tlb_mm
4         0.0100  inode_init_once
4         0.0100  kmap_atomic_prot
4         0.0100  put_page
4         0.0100  restore_nocheck
4         0.0100  schedule
4         0.0100  vm_normal_page
3         0.0075  __follow_mount
3         0.0075  __mutex_lock_slowpath
3         0.0075  __rmqueue
3         0.0075  anon_vma_unlink
3         0.0075  ktime_get_ts
3         0.0075  mark_page_accessed
3         0.0075  memcpy
3         0.0075  prio_tree_insert
3         0.0075  strncpy_from_user
3         0.0075  sys_close
2         0.0050  __atomic_notifier_call_chain
2         0.0050  __find_get_block_slow
2         0.0050  __lookup_mnt
2         0.0050  __mutex_unlock_slowpath
2         0.0050  __rb_rotate_left
2         0.0050  __rcu_process_callbacks
2         0.0050  __switch_to
2         0.0050  anon_vma_prepare
2         0.0050  cache_alloc_refill
2         0.0050  debug_mutex_add_waiter
2         0.0050  do_path_lookup
2         0.0050  dup_fd
2         0.0050  generic_fillattr
2         0.0050  generic_make_request
2         0.0050  get_task_mm
2         0.0050  get_unused_fd
2         0.0050  getnstimeofday
2         0.0050  hrtimer_interrupt
2         0.0050  hweight32
2         0.0050  inotify_dentry_parent_queue_event
2         0.0050  link_path_walk
2         0.0050  mask_and_ack_8259A
2         0.0050  may_open
2         0.0050  path_walk
2         0.0050  pgd_alloc
2         0.0050  preempt_schedule
2         0.0050  proc_lookup
2         0.0050  tick_nohz_restart_sched_tick
2         0.0050  unlink_file_vma
2         0.0050  vm_stat_account
2         0.0050  vma_merge
2         0.0050  zone_watermark_ok
1         0.0025  __alloc_pages
1         0.0025  __alloc_skb
1         0.0025  __copy_from_user_ll
1         0.0025  __copy_user_intel
1         0.0025  __dentry_open
1         0.0025  __do_softirq
1         0.0025  __end_that_request_first
1         0.0025  __fput
1         0.0025  __free_pages
1         0.0025  __getblk
1         0.0025  __inc_zone_state
1         0.0025  __kmalloc
1         0.0025  __pagevec_lru_add
1         0.0025  __pte_alloc
1         0.0025  __put_task_struct
1         0.0025  __tasklet_schedule
1         0.0025  __vm_enough_memory
1         0.0025  __vma_link_rb
1         0.0025  _read_lock_irqsave
1         0.0025  _spin_lock_irqsave
1         0.0025  account_user_time
1         0.0025  alloc_buffer_head
1         0.0025  alloc_inode
1         0.0025  apic_timer_interrupt
1         0.0025  arch_get_unmapped_area_topdown
1         0.0025  arch_pick_mmap_layout
1         0.0025  attach_pid
1         0.0025  bio_init
1         0.0025  block_read_full_page
1         0.0025  cache_reap
1         0.0025  call_rcu
1         0.0025  can_share_swap_page
1         0.0025  cfq_set_request
1         0.0025  check_userspace
1         0.0025  cleanup_timers
1         0.0025  clockevents_program_event
1         0.0025  clocksource_get_next
1         0.0025  compute_creds
1         0.0025  copy_from_user
1         0.0025  copy_strings
1         0.0025  create_read_pipe
1         0.0025  current_fs_time
1         0.0025  current_io_context
1         0.0025  d_instantiate
1         0.0025  d_splice_alias
1         0.0025  debug_mutex_unlock
1         0.0025  delayed_put_task_struct
1         0.0025  dnotify_flush
1         0.0025  dnotify_parent
1         0.0025  do_exit
1         0.0025  do_fcntl
1         0.0025  do_lookup
1         0.0025  do_munmap
1         0.0025  do_notify_resume
1         0.0025  do_softirq
1         0.0025  do_sys_open
1         0.0025  do_wait
1         0.0025  down_read_trylock
1         0.0025  down_write
1         0.0025  dput
1         0.0025  dummy_inode_getattr
1         0.0025  eligible_child
1         0.0025  elv_dispatch_sort
1         0.0025  end_buffer_write_sync
1         0.0025  enqueue_hrtimer
1         0.0025  exit_mmap
1         0.0025  fget
1         0.0025  fget_light
1         0.0025  file_read_actor
1         0.0025  filp_close
1         0.0025  find_busiest_group
1         0.0025  find_lock_page
1         0.0025  find_next_zero_bit
1         0.0025  find_or_create_page
1         0.0025  find_vma_prev
1         0.0025  flush_old_exec
1         0.0025  flush_sigqueue
1         0.0025  flush_tlb_page
1         0.0025  fput
1         0.0025  free_block
1         0.0025  free_page_and_swap_cache
1         0.0025  free_pgtables
1         0.0025  free_poll_entry
1         0.0025  generic_file_mmap
1         0.0025  generic_segment_checks
1         0.0025  get_empty_filp
1         0.0025  get_next_timer_interrupt
1         0.0025  getname
1         0.0025  inode_change_ok
1         0.0025  internal_add_timer
1         0.0025  invalidate_inode_buffers
1         0.0025  kill_fasync
1         0.0025  kmap
1         0.0025  kmem_cache_zalloc
1         0.0025  ktime_get
1         0.0025  kunmap_atomic
1         0.0025  ll_back_merge_fn
1         0.0025  lookup_hash
1         0.0025  lookup_mnt
1         0.0025  lru_cache_add_active
1         0.0025  mempool_free_slab
1         0.0025  mm_alloc
1         0.0025  mm_release
1         0.0025  mmput
1         0.0025  mntput_no_expire
1         0.0025  native_set_pte_at
1         0.0025  number
1         0.0025  page_add_file_rmap
1         0.0025  page_add_new_anon_rmap
1         0.0025  page_remove_rmap
1         0.0025  page_waitqueue
1         0.0025  path_release
1         0.0025  peer_avl_rebalance
1         0.0025  percpu_counter_mod
1         0.0025  permission
1         0.0025  pipe_write
1         0.0025  prio_tree_replace
1         0.0025  proc_flush_task
1         0.0025  proc_pid_lookup
1         0.0025  radix_tree_tag_set
1         0.0025  rb_insert_color
1         0.0025  remove_vma
1         0.0025  restore_all
1         0.0025  rm_from_queue_full
1         0.0025  rw_verify_area
1         0.0025  sched_balance_self
1         0.0025  set_bh_page
1         0.0025  set_normalized_timespec
1         0.0025  set_task_comm
1         0.0025  setup_sigcontext
1         0.0025  show_stat
1         0.0025  sync_page
1         0.0025  sys_dup2
1         0.0025  sys_faccessat
1         0.0025  sys_ftruncate
1         0.0025  sys_read
1         0.0025  sys_rt_sigprocmask
1         0.0025  sys_select
1         0.0025  task_rq_lock
1         0.0025  task_running_tick
1         0.0025  tcp_poll
1         0.0025  tick_do_update_jiffies64
1         0.0025  tick_nohz_stop_sched_tick
1         0.0025  try_to_wake_up
1         0.0025  unix_poll
1         0.0025  unlock_buffer
1         0.0025  up_read
1         0.0025  update_wall_time
1         0.0025  vfs_getattr
1         0.0025  vfs_permission
1         0.0025  vfs_read
1         0.0025  vm_acct_memory
1         0.0025  vsnprintf
1         0.0025  wake_up_inode
1         0.0025  wake_up_new_task
1         0.0025  work_notifysig
procs -----------memory---------- ---swap-- -----io---- -system-- ----cpu----
 r  b   swpd   free   buff  cache   si   so    bi    bo   in   cs us sy id wa
 4  2      0 161676   9716  55700    0    0   248  2020   50  131  5  4 84  7
 4  2      0 161668   9716  55704    0    0     0 16000  253  504 80 20  0  0
 3  2      0 161668   9716  55704    0    0     0 16000  249  522 66 34  0  0
 3  2      0 161608   9716  55704    0    0     0 15936  251  508 80 20  0  0
 3  2      0 161548   9716  55704    0    0     0 15936  249  523 73 28  0  0
 4  2      0 161488   9716  55704    0    0     0 15936  250  517 84 16  0  0
 3  2      0 161488   9724  55704    0    0     0 15876  252  469 57 43  0  0
 4  2      0 161428   9724  55704    0    0     0 15872  253  504 60 40  0  0
 3  2      0 161428   9724  55704    0    0     0 15936  248  500 24 76  0  0
 4  2      0 161428   9740  55704    0    0     0 15840  258  475 52 48  0  0

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