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    SubjectRe: XFS/btrfs performance after IO-less dirty throttling
    On Fri, Dec 16, 2011 at 08:31:57AM +0800, Dave Chinner wrote:
    > On Thu, Dec 15, 2011 at 09:31:37PM +0800, Wu Fengguang wrote:
    > > > The other big regressions happen in the XFS UKEY-thresh=100M cases.
    > >
    > > > 3.1.0+ 3.2.0-rc3
    > > > ------------------------ ------------------------
    > > > 4.17 -37.8% 2.59 fat/UKEY-thresh=100M/xfs-100dd-1-3.1.0+
    > > > 4.14 -53.3% 1.94 fat/UKEY-thresh=100M/xfs-10dd-1-3.1.0+
    > > > 6.30 +0.4% 6.33 fat/UKEY-thresh=100M/xfs-1dd-1-3.1.0+
    > >
    > > Here are more details for the 10dd case. The attached
    > > balance_dirty_pages-pause.png shows small pause time (mostly in range
    > > 10-50ms) and nr_dirtied_pause (mostly < 5), which may be the root cause.
    > >
    > > The iostat graphs show very unstable throughput and IO size often
    > > drops low.
    >
    > And it's doing shitloads more allocation work. IOWs, the delayed
    > allocation algorithms are being strangled by writeback, causing
    > fragmentation and hence not allowing enough data per thread to be
    > written at a time to maximise throughput.

    OK, good to know this. For your convenience, below is a comparison
    between 3.2.0-rc3 and 3.2.0-rc3-pause6+, where both kernels are doing
    IO-less dirty throttling and the latter does longer pause time/intervals
    and hence make XFS work better. Hopefully this comparison is more
    suitable for understanding the pause time/intervals' impact on XFS.

    > However, I'd argue that the performance of 10 concurrent writers to
    > a slow USB key formatted with XFS is so *completely irrelevant* that
    > I'd ignore it. Spend your time optimising writeback on XFS for high
    > throughputs (e.g > 500MB/s), not for shitty $5 USB keys that are 2-3
    > orders of magnitude slower than the target market for XFS...

    That makes good sense. However it's always good to understand the root
    cause (as you already did) and make sure there is no bug inside XFS
    (and the other FS) that could somehow show up elsewhere in the fast
    arrays that we care.

    I'm indeed happy that you don't care that much on that regression
    introduced by me ;-)

    Thanks,
    Fengguang
    ---

    Note: the case for 3.2.0-rc3-pause6+ is re-ran to generate the missing
    perf-stat in the previous email.

    % ./compare-xfs fat/UKEY-thresh=100M/xfs-10dd-1-3.2.0-rc3 fat/UKEY-thresh=100M/xfs-10dd-1-3.2.0-rc3-pause6+| g TOTAL
    1.94 +39.5% 2.70 TOTAL write_bw
    1995.32 +45.0% 2893.64 TOTAL io_wkB_s
    17.96 +42.1% 25.52 TOTAL io_w_s
    0.06 -42.1% 0.04 TOTAL io_wrqm_s
    0.04 +18.2% 0.04 TOTAL io_rkB_s
    0.02 +11.1% 0.02 TOTAL io_r_s
    0.00 0.00 TOTAL io_rrqm_s
    205.05 +1.2% 207.47 TOTAL io_avgrq_sz
    172.78 -14.2% 148.33 TOTAL io_avgqu_sz
    8231.55 -32.3% 5570.70 TOTAL io_await
    86.04 -18.4% 70.20 TOTAL io_svctm
    100.00 -0.0% 100.00 TOTAL io_util
    0.26 -81.7% 0.05 TOTAL cpu_user
    0.00 0.00 TOTAL cpu_nice
    0.10 +24.6% 0.12 TOTAL cpu_system
    66.28 -0.7% 65.79 TOTAL cpu_iowait
    0.00 0.00 TOTAL cpu_steal
    33.36 +2.0% 34.05 TOTAL cpu_idle
    1.94 +39.5% 2.70 TOTAL write_bw
    0.00 0.00 TOTAL writeback:writeback_nothread
    0.00 0.00 TOTAL writeback:writeback_queue
    0.00 0.00 TOTAL writeback:writeback_exec
    827.00 +20.7% 998.00 TOTAL writeback:writeback_start
    827.00 +20.7% 998.00 TOTAL writeback:writeback_written
    0.00 1.00 TOTAL writeback:writeback_wait
    402.00 -30.3% 280.00 TOTAL writeback:writeback_pages_written
    0.00 0.00 TOTAL writeback:writeback_nowork
    349.00 -32.7% 235.00 TOTAL writeback:writeback_wake_background
    80.00 +22.5% 98.00 TOTAL writeback:writeback_wake_thread
    0.00 2.00 TOTAL writeback:writeback_wake_forker_thread
    0.00 0.00 TOTAL writeback:writeback_bdi_register
    0.00 0.00 TOTAL writeback:writeback_bdi_unregister
    1.00 +100.0% 2.00 TOTAL writeback:writeback_thread_start
    1.00 +100.0% 2.00 TOTAL writeback:writeback_thread_stop
    1506.00 -1.0% 1491.00 TOTAL writeback:wbc_writepage
    666.00 +4.5% 696.00 TOTAL writeback:writeback_queue_io
    169482.00 -82.8% 29193.00 TOTAL writeback:global_dirty_state
    2910.00 -11.5% 2574.00 TOTAL writeback:bdi_dirty_ratelimit
    166968.00 -83.8% 27111.00 TOTAL writeback:balance_dirty_pages
    0.00 0.00 TOTAL writeback:writeback_congestion_wait
    0.00 0.00 TOTAL writeback:writeback_wait_iff_congested
    0.00 0.00 TOTAL writeback:writeback_single_inode_requeue
    534.00 +50.2% 802.00 TOTAL writeback:writeback_single_inode
    0.00 0.00 TOTAL block:block_rq_abort
    0.00 0.00 TOTAL block:block_rq_requeue
    10789.00 +42.0% 15323.00 TOTAL block:block_rq_complete
    11639.00 +38.1% 16078.00 TOTAL block:block_rq_insert
    11376.00 +40.0% 15927.00 TOTAL block:block_rq_issue
    0.00 0.00 TOTAL block:block_bio_bounce
    0.00 0.00 TOTAL block:block_bio_complete
    38.00 -42.1% 22.00 TOTAL block:block_bio_backmerge
    0.00 0.00 TOTAL block:block_bio_frontmerge
    11091.00 +39.8% 15500.00 TOTAL block:block_bio_queue
    11639.00 +38.1% 16079.00 TOTAL block:block_getrq
    280.00 +63.6% 458.00 TOTAL block:block_sleeprq
    1244.00 +30.5% 1623.00 TOTAL block:block_plug
    1244.00 +30.5% 1623.00 TOTAL block:block_unplug
    0.00 0.00 TOTAL block:block_split
    11091.00 +39.8% 15500.00 TOTAL block:block_bio_remap
    0.00 0.00 TOTAL block:block_rq_remap
    1.94 +39.5% 2.70 TOTAL write_bw
    0.00 0.00 TOTAL xfs:xfs_attr_list_sf
    0.00 0.00 TOTAL xfs:xfs_attr_list_sf_all
    0.00 0.00 TOTAL xfs:xfs_attr_list_leaf
    0.00 0.00 TOTAL xfs:xfs_attr_list_leaf_end
    0.00 0.00 TOTAL xfs:xfs_attr_list_full
    0.00 0.00 TOTAL xfs:xfs_attr_list_add
    0.00 0.00 TOTAL xfs:xfs_attr_list_wrong_blk
    0.00 0.00 TOTAL xfs:xfs_attr_list_notfound
    102834.00 -10.2% 92301.00 TOTAL xfs:xfs_perag_get
    0.00 0.00 TOTAL xfs:xfs_perag_get_tag
    85219.00 -11.3% 75617.00 TOTAL xfs:xfs_perag_put
    0.00 1.00 TOTAL xfs:xfs_perag_set_reclaim
    0.00 0.00 TOTAL xfs:xfs_perag_clear_reclaim
    0.00 0.00 TOTAL xfs:xfs_attr_list_node_descend
    302.00 -13.2% 262.00 TOTAL xfs:xfs_iext_insert
    93.00 +55.9% 145.00 TOTAL xfs:xfs_iext_remove
    10839.00 +3.9% 11265.00 TOTAL xfs:xfs_bmap_pre_update
    10839.00 +3.9% 11265.00 TOTAL xfs:xfs_bmap_post_update
    0.00 0.00 TOTAL xfs:xfs_extlist
    393.00 -74.8% 99.00 TOTAL xfs:xfs_buf_init
    0.00 0.00 TOTAL xfs:xfs_buf_free
    1121.00 -17.4% 926.00 TOTAL xfs:xfs_buf_hold
    14006.00 -45.4% 7650.00 TOTAL xfs:xfs_buf_rele
    652.00 -23.6% 498.00 TOTAL xfs:xfs_buf_iodone
    480.00 -20.0% 384.00 TOTAL xfs:xfs_buf_iorequest
    0.00 0.00 TOTAL xfs:xfs_buf_bawrite
    54.00 -24.1% 41.00 TOTAL xfs:xfs_buf_lock
    54.00 -24.1% 41.00 TOTAL xfs:xfs_buf_lock_done
    36012.00 -55.0% 16207.00 TOTAL xfs:xfs_buf_trylock
    3453.00 -0.8% 3426.00 TOTAL xfs:xfs_buf_unlock
    13.00 +0.0% 13.00 TOTAL xfs:xfs_buf_iowait
    15.00 +0.0% 15.00 TOTAL xfs:xfs_buf_iowait_done
    2734.00 +8.7% 2971.00 TOTAL xfs:xfs_buf_delwri_queue
    0.00 1.00 TOTAL xfs:xfs_buf_delwri_dequeue
    169.00 -34.3% 111.00 TOTAL xfs:xfs_buf_delwri_split
    0.00 0.00 TOTAL xfs:xfs_buf_get_uncached
    0.00 0.00 TOTAL xfs:xfs_bdstrat_shut
    321.00 +6.2% 341.00 TOTAL xfs:xfs_buf_item_relse
    0.00 0.00 TOTAL xfs:xfs_buf_item_iodone
    0.00 0.00 TOTAL xfs:xfs_buf_item_iodone_async
    0.00 0.00 TOTAL xfs:xfs_buf_error_relse
    0.00 0.00 TOTAL xfs:xfs_trans_read_buf_io
    0.00 0.00 TOTAL xfs:xfs_trans_read_buf_shut
    0.00 0.00 TOTAL xfs:xfs_btree_corrupt
    0.00 0.00 TOTAL xfs:xfs_da_btree_corrupt
    0.00 0.00 TOTAL xfs:xfs_reset_dqcounts
    0.00 0.00 TOTAL xfs:xfs_inode_item_push
    1661.00 +11.4% 1851.00 TOTAL xfs:xfs_buf_find
    1600.00 +14.1% 1825.00 TOTAL xfs:xfs_buf_get
    1597.00 +14.1% 1822.00 TOTAL xfs:xfs_buf_read
    482.00 -19.7% 387.00 TOTAL xfs:xfs_buf_ioerror
    1206.00 -2.7% 1173.00 TOTAL xfs:xfs_buf_item_size
    0.00 1.00 TOTAL xfs:xfs_buf_item_size_stale
    1206.00 -2.7% 1173.00 TOTAL xfs:xfs_buf_item_format
    0.00 1.00 TOTAL xfs:xfs_buf_item_format_stale
    1137.00 -11.9% 1002.00 TOTAL xfs:xfs_buf_item_pin
    1131.00 -12.4% 991.00 TOTAL xfs:xfs_buf_item_unpin
    0.00 0.00 TOTAL xfs:xfs_buf_item_unpin_stale
    149.00 -43.6% 84.00 TOTAL xfs:xfs_buf_item_trylock
    1208.00 -2.6% 1176.00 TOTAL xfs:xfs_buf_item_unlock
    0.00 1.00 TOTAL xfs:xfs_buf_item_unlock_stale
    1131.00 -12.4% 991.00 TOTAL xfs:xfs_buf_item_committed
    0.00 0.00 TOTAL xfs:xfs_buf_item_push
    149.00 -43.6% 84.00 TOTAL xfs:xfs_buf_item_pushbuf
    3.00 +0.0% 3.00 TOTAL xfs:xfs_trans_get_buf
    0.00 0.00 TOTAL xfs:xfs_trans_get_buf_recur
    19.00 -26.3% 14.00 TOTAL xfs:xfs_trans_getsb
    0.00 0.00 TOTAL xfs:xfs_trans_getsb_recur
    1503.00 -0.3% 1499.00 TOTAL xfs:xfs_trans_read_buf
    9.00 +922.2% 92.00 TOTAL xfs:xfs_trans_read_buf_recur
    2638.00 +0.3% 2646.00 TOTAL xfs:xfs_trans_log_buf
    1198.00 +4.3% 1250.00 TOTAL xfs:xfs_trans_brelse
    0.00 0.00 TOTAL xfs:xfs_trans_bjoin
    0.00 0.00 TOTAL xfs:xfs_trans_bhold
    0.00 0.00 TOTAL xfs:xfs_trans_bhold_release
    0.00 1.00 TOTAL xfs:xfs_trans_binval
    1497731.00 +45.8% 2183524.00 TOTAL xfs:xfs_ilock
    13167.00 -32.9% 8829.00 TOTAL xfs:xfs_ilock_nowait
    0.00 0.00 TOTAL xfs:xfs_ilock_demote
    1510701.00 +45.1% 2192357.00 TOTAL xfs:xfs_iunlock
    0.00 0.00 TOTAL xfs:xfs_iget_skip
    0.00 0.00 TOTAL xfs:xfs_iget_reclaim
    0.00 0.00 TOTAL xfs:xfs_iget_reclaim_fail
    0.00 0.00 TOTAL xfs:xfs_iget_hit
    0.00 0.00 TOTAL xfs:xfs_iget_miss
    33.00 +6.1% 35.00 TOTAL xfs:xfs_getattr
    0.00 0.00 TOTAL xfs:xfs_setattr
    0.00 0.00 TOTAL xfs:xfs_readlink
    0.00 0.00 TOTAL xfs:xfs_alloc_file_space
    0.00 0.00 TOTAL xfs:xfs_free_file_space
    4.00 +50.0% 6.00 TOTAL xfs:xfs_readdir
    0.00 0.00 TOTAL xfs:xfs_get_acl
    0.00 0.00 TOTAL xfs:xfs_vm_bmap
    0.00 0.00 TOTAL xfs:xfs_file_ioctl
    0.00 0.00 TOTAL xfs:xfs_file_compat_ioctl
    0.00 0.00 TOTAL xfs:xfs_ioctl_setattr
    0.00 0.00 TOTAL xfs:xfs_dir_fsync
    0.00 0.00 TOTAL xfs:xfs_file_fsync
    0.00 1.00 TOTAL xfs:xfs_destroy_inode
    246.00 +68.7% 415.00 TOTAL xfs:xfs_write_inode
    1.00 +200.0% 3.00 TOTAL xfs:xfs_evict_inode
    0.00 0.00 TOTAL xfs:xfs_dquot_dqalloc
    0.00 0.00 TOTAL xfs:xfs_dquot_dqdetach
    0.00 0.00 TOTAL xfs:xfs_ihold
    193614.00 -5.3% 183377.00 TOTAL xfs:xfs_irele
    310.00 -11.3% 275.00 TOTAL xfs:xfs_inode_pin
    315.00 -11.7% 278.00 TOTAL xfs:xfs_inode_unpin
    0.00 0.00 TOTAL xfs:xfs_inode_unpin_nowait
    1.00 +200.0% 3.00 TOTAL xfs:xfs_remove
    0.00 0.00 TOTAL xfs:xfs_link
    0.00 0.00 TOTAL xfs:xfs_lookup
    0.00 0.00 TOTAL xfs:xfs_create
    0.00 0.00 TOTAL xfs:xfs_symlink
    0.00 0.00 TOTAL xfs:xfs_rename
    0.00 0.00 TOTAL xfs:xfs_dqadjust
    0.00 0.00 TOTAL xfs:xfs_dqreclaim_want
    0.00 0.00 TOTAL xfs:xfs_dqreclaim_dirty
    0.00 0.00 TOTAL xfs:xfs_dqreclaim_unlink
    0.00 0.00 TOTAL xfs:xfs_dqattach_found
    0.00 0.00 TOTAL xfs:xfs_dqattach_get
    0.00 0.00 TOTAL xfs:xfs_dqinit
    0.00 0.00 TOTAL xfs:xfs_dqreuse
    0.00 0.00 TOTAL xfs:xfs_dqalloc
    0.00 0.00 TOTAL xfs:xfs_dqtobp_read
    0.00 0.00 TOTAL xfs:xfs_dqread
    0.00 0.00 TOTAL xfs:xfs_dqread_fail
    0.00 0.00 TOTAL xfs:xfs_dqlookup_found
    0.00 0.00 TOTAL xfs:xfs_dqlookup_want
    0.00 0.00 TOTAL xfs:xfs_dqlookup_freelist
    0.00 0.00 TOTAL xfs:xfs_dqlookup_done
    0.00 0.00 TOTAL xfs:xfs_dqget_hit
    0.00 0.00 TOTAL xfs:xfs_dqget_miss
    0.00 0.00 TOTAL xfs:xfs_dqput
    0.00 0.00 TOTAL xfs:xfs_dqput_wait
    0.00 0.00 TOTAL xfs:xfs_dqput_free
    0.00 0.00 TOTAL xfs:xfs_dqrele
    0.00 0.00 TOTAL xfs:xfs_dqflush
    0.00 0.00 TOTAL xfs:xfs_dqflush_force
    0.00 0.00 TOTAL xfs:xfs_dqflush_done
    627.00 -12.1% 551.00 TOTAL xfs:xfs_log_done_nonperm
    12.00 +483.3% 70.00 TOTAL xfs:xfs_log_done_perm
    339.00 +5.9% 359.00 TOTAL xfs:xfs_log_reserve
    0.00 0.00 TOTAL xfs:xfs_log_umount_write
    327.00 -11.6% 289.00 TOTAL xfs:xfs_log_grant_enter
    327.00 -11.6% 289.00 TOTAL xfs:xfs_log_grant_exit
    0.00 0.00 TOTAL xfs:xfs_log_grant_error
    0.00 0.00 TOTAL xfs:xfs_log_grant_sleep1
    0.00 0.00 TOTAL xfs:xfs_log_grant_wake1
    0.00 0.00 TOTAL xfs:xfs_log_grant_sleep2
    0.00 0.00 TOTAL xfs:xfs_log_grant_wake2
    0.00 0.00 TOTAL xfs:xfs_log_grant_wake_up
    6.00 +933.3% 62.00 TOTAL xfs:xfs_log_regrant_write_enter
    6.00 +933.3% 62.00 TOTAL xfs:xfs_log_regrant_write_exit
    0.00 0.00 TOTAL xfs:xfs_log_regrant_write_error
    0.00 0.00 TOTAL xfs:xfs_log_regrant_write_sleep1
    0.00 0.00 TOTAL xfs:xfs_log_regrant_write_wake1
    0.00 0.00 TOTAL xfs:xfs_log_regrant_write_sleep2
    0.00 0.00 TOTAL xfs:xfs_log_regrant_write_wake2
    0.00 0.00 TOTAL xfs:xfs_log_regrant_write_wake_up
    12.00 +483.3% 70.00 TOTAL xfs:xfs_log_regrant_reserve_enter
    6.00 +933.3% 62.00 TOTAL xfs:xfs_log_regrant_reserve_exit
    12.00 +483.3% 70.00 TOTAL xfs:xfs_log_regrant_reserve_sub
    627.00 -12.1% 551.00 TOTAL xfs:xfs_log_ungrant_enter
    627.00 -11.8% 553.00 TOTAL xfs:xfs_log_ungrant_exit
    627.00 -11.8% 553.00 TOTAL xfs:xfs_log_ungrant_sub
    261.00 -96.6% 9.00 TOTAL xfs:xfs_ail_push
    10520.00 -55.2% 4715.00 TOTAL xfs:xfs_ail_pushbuf
    0.00 0.00 TOTAL xfs:xfs_ail_pushbuf_pinned
    152.00 -28.9% 108.00 TOTAL xfs:xfs_ail_pinned
    23075.00 -66.4% 7756.00 TOTAL xfs:xfs_ail_locked
    0.00 0.00 TOTAL xfs:xfs_file_read
    296153.00 +46.5% 433727.00 TOTAL xfs:xfs_file_buffered_write
    0.00 0.00 TOTAL xfs:xfs_file_direct_write
    0.00 0.00 TOTAL xfs:xfs_file_splice_read
    0.00 0.00 TOTAL xfs:xfs_file_splice_write
    638.00 +13.9% 727.00 TOTAL xfs:xfs_writepage
    44327.00 +400.3% 221766.00 TOTAL xfs:xfs_releasepage
    44327.00 +419.4% 230216.00 TOTAL xfs:xfs_invalidatepage
    337.00 +37.4% 463.00 TOTAL xfs:xfs_map_blocks_found
    303.00 -12.2% 266.00 TOTAL xfs:xfs_map_blocks_alloc
    275503.00 +50.2% 413675.00 TOTAL xfs:xfs_get_blocks_found
    20489.00 -3.1% 19847.00 TOTAL xfs:xfs_get_blocks_alloc
    10829.00 +4.3% 11296.00 TOTAL xfs:xfs_delalloc_enospc
    0.00 0.00 TOTAL xfs:xfs_unwritten_convert
    0.00 0.00 TOTAL xfs:xfs_get_blocks_notfound
    555.00 +27.4% 707.00 TOTAL xfs:xfs_setfilesize
    6.00 +66.7% 10.00 TOTAL xfs:xfs_itruncate_data_start
    6.00 +66.7% 10.00 TOTAL xfs:xfs_itruncate_data_end
    0.00 0.00 TOTAL xfs:xfs_pagecache_inval
    6.00 +516.7% 37.00 TOTAL xfs:xfs_bunmap
    6.00 +983.3% 65.00 TOTAL xfs:xfs_alloc_busy
    0.00 0.00 TOTAL xfs:xfs_alloc_busy_enomem
    0.00 0.00 TOTAL xfs:xfs_alloc_busy_force
    0.00 0.00 TOTAL xfs:xfs_alloc_busy_reuse
    0.00 0.00 TOTAL xfs:xfs_alloc_busy_clear
    0.00 0.00 TOTAL xfs:xfs_alloc_busy_trim
    0.00 0.00 TOTAL xfs:xfs_trans_commit_lsn
    928.00 -5.0% 882.00 TOTAL xfs:xfs_agf
    6.00 +983.3% 65.00 TOTAL xfs:xfs_free_extent
    0.00 0.00 TOTAL xfs:xfs_alloc_exact_done
    0.00 0.00 TOTAL xfs:xfs_alloc_exact_notfound
    0.00 0.00 TOTAL xfs:xfs_alloc_exact_error
    0.00 0.00 TOTAL xfs:xfs_alloc_near_nominleft
    291.00 -11.7% 257.00 TOTAL xfs:xfs_alloc_near_first
    0.00 0.00 TOTAL xfs:xfs_alloc_near_greater
    0.00 0.00 TOTAL xfs:xfs_alloc_near_lesser
    0.00 0.00 TOTAL xfs:xfs_alloc_near_error
    0.00 0.00 TOTAL xfs:xfs_alloc_near_noentry
    0.00 0.00 TOTAL xfs:xfs_alloc_near_busy
    0.00 0.00 TOTAL xfs:xfs_alloc_size_neither
    0.00 0.00 TOTAL xfs:xfs_alloc_size_noentry
    2.00 +0.0% 2.00 TOTAL xfs:xfs_alloc_size_nominleft
    14.00 -14.3% 12.00 TOTAL xfs:xfs_alloc_size_done
    0.00 0.00 TOTAL xfs:xfs_alloc_size_error
    0.00 0.00 TOTAL xfs:xfs_alloc_size_busy
    0.00 0.00 TOTAL xfs:xfs_alloc_small_freelist
    0.00 0.00 TOTAL xfs:xfs_alloc_small_notenough
    5.00 +0.0% 5.00 TOTAL xfs:xfs_alloc_small_done
    0.00 0.00 TOTAL xfs:xfs_alloc_small_error
    0.00 0.00 TOTAL xfs:xfs_alloc_vextent_badargs
    0.00 0.00 TOTAL xfs:xfs_alloc_vextent_nofix
    0.00 0.00 TOTAL xfs:xfs_alloc_vextent_noagbp
    112.00 -14.3% 96.00 TOTAL xfs:xfs_alloc_vextent_loopfailed
    0.00 0.00 TOTAL xfs:xfs_alloc_vextent_allfailed
    0.00 0.00 TOTAL xfs:xfs_dir2_sf_addname
    0.00 0.00 TOTAL xfs:xfs_dir2_sf_create
    0.00 0.00 TOTAL xfs:xfs_dir2_sf_lookup
    0.00 0.00 TOTAL xfs:xfs_dir2_sf_replace
    1.00 +700.0% 8.00 TOTAL xfs:xfs_dir2_sf_removename
    0.00 0.00 TOTAL xfs:xfs_dir2_sf_toino4
    0.00 0.00 TOTAL xfs:xfs_dir2_sf_toino8
    0.00 0.00 TOTAL xfs:xfs_dir2_sf_to_block
    0.00 0.00 TOTAL xfs:xfs_dir2_block_addname
    0.00 0.00 TOTAL xfs:xfs_dir2_block_lookup
    0.00 0.00 TOTAL xfs:xfs_dir2_block_replace
    0.00 0.00 TOTAL xfs:xfs_dir2_block_removename
    0.00 0.00 TOTAL xfs:xfs_dir2_block_to_sf
    0.00 0.00 TOTAL xfs:xfs_dir2_block_to_leaf
    0.00 0.00 TOTAL xfs:xfs_dir2_leaf_addname
    0.00 0.00 TOTAL xfs:xfs_dir2_leaf_lookup
    0.00 0.00 TOTAL xfs:xfs_dir2_leaf_replace
    0.00 0.00 TOTAL xfs:xfs_dir2_leaf_removename
    0.00 0.00 TOTAL xfs:xfs_dir2_leaf_to_block
    0.00 0.00 TOTAL xfs:xfs_dir2_leaf_to_node
    0.00 0.00 TOTAL xfs:xfs_dir2_node_addname
    0.00 0.00 TOTAL xfs:xfs_dir2_node_lookup
    0.00 0.00 TOTAL xfs:xfs_dir2_node_replace
    0.00 0.00 TOTAL xfs:xfs_dir2_node_removename
    0.00 0.00 TOTAL xfs:xfs_dir2_node_to_leaf
    0.00 0.00 TOTAL xfs:xfs_dir2_leafn_add
    0.00 0.00 TOTAL xfs:xfs_dir2_leafn_remove
    0.00 0.00 TOTAL xfs:xfs_dir2_grow_inode
    0.00 0.00 TOTAL xfs:xfs_dir2_shrink_inode
    0.00 0.00 TOTAL xfs:xfs_dir2_leafn_moveents
    0.00 0.00 TOTAL xfs:xfs_swap_extent_before
    0.00 0.00 TOTAL xfs:xfs_swap_extent_after
    0.00 0.00 TOTAL xfs:xfs_log_recover_item_add
    0.00 0.00 TOTAL xfs:xfs_log_recover_item_add_cont
    0.00 0.00 TOTAL xfs:xfs_log_recover_item_reorder_head
    0.00 0.00 TOTAL xfs:xfs_log_recover_item_reorder_tail
    0.00 0.00 TOTAL xfs:xfs_log_recover_item_recover
    0.00 0.00 TOTAL xfs:xfs_log_recover_buf_not_cancel
    0.00 0.00 TOTAL xfs:xfs_log_recover_buf_cancel
    0.00 0.00 TOTAL xfs:xfs_log_recover_buf_cancel_add
    0.00 0.00 TOTAL xfs:xfs_log_recover_buf_cancel_ref_inc
    0.00 0.00 TOTAL xfs:xfs_log_recover_buf_recover
    0.00 0.00 TOTAL xfs:xfs_log_recover_buf_inode_buf
    0.00 0.00 TOTAL xfs:xfs_log_recover_buf_reg_buf
    0.00 0.00 TOTAL xfs:xfs_log_recover_buf_dquot_buf
    0.00 0.00 TOTAL xfs:xfs_log_recover_inode_recover
    0.00 0.00 TOTAL xfs:xfs_log_recover_inode_cancel
    0.00 0.00 TOTAL xfs:xfs_log_recover_inode_skip
    0.00 0.00 TOTAL xfs:xfs_discard_extent
    0.00 0.00 TOTAL xfs:xfs_discard_toosmall
    0.00 0.00 TOTAL xfs:xfs_discard_exclude
    0.00 0.00 TOTAL xfs:xfs_discard_busy
    1.94 +39.5% 2.70 TOTAL write_bw
    0.00 0.00 TOTAL nr_vmscan_write
    0.00 0.00 TOTAL nr_vmscan_immediate_reclaim
    319739.00 +42.6% 456105.00 TOTAL nr_dirtied
    297242.00 +45.8% 433527.00 TOTAL nr_written
    568782.00 +24.3% 706989.00 TOTAL numa_hit
    0.00 0.00 TOTAL numa_miss
    0.00 0.00 TOTAL numa_foreign
    8920.00 +2.8% 9171.00 TOTAL numa_interleave
    568782.00 +24.3% 706989.00 TOTAL numa_local
    0.00 0.00 TOTAL numa_other
    13047.00 +0.0% 13051.00 TOTAL pgpgin
    1238595.00 +42.6% 1766404.00 TOTAL pgpgout
    0.00 0.00 TOTAL pswpin
    0.00 0.00 TOTAL pswpout
    0.00 0.00 TOTAL pgalloc_dma
    597775.00 +23.6% 738677.00 TOTAL pgalloc_dma32
    0.00 0.00 TOTAL pgalloc_normal
    0.00 0.00 TOTAL pgalloc_movable
    969675.00 -0.4% 965391.00 TOTAL pgfree
    3887.00 +9.9% 4272.00 TOTAL pgactivate
    0.00 0.00 TOTAL pgdeactivate
    520365.00 -4.7% 496138.00 TOTAL pgfault
    194.00 +5.7% 205.00 TOTAL pgmajfault
    0.00 0.00 TOTAL pgrefill_dma
    0.00 0.00 TOTAL pgrefill_dma32
    0.00 0.00 TOTAL pgrefill_normal
    0.00 0.00 TOTAL pgrefill_movable
    0.00 0.00 TOTAL pgsteal_dma
    0.00 0.00 TOTAL pgsteal_dma32
    0.00 0.00 TOTAL pgsteal_normal
    0.00 0.00 TOTAL pgsteal_movable
    0.00 0.00 TOTAL pgscan_kswapd_dma
    0.00 0.00 TOTAL pgscan_kswapd_dma32
    0.00 0.00 TOTAL pgscan_kswapd_normal
    0.00 0.00 TOTAL pgscan_kswapd_movable
    0.00 0.00 TOTAL pgscan_direct_dma
    0.00 0.00 TOTAL pgscan_direct_dma32
    0.00 0.00 TOTAL pgscan_direct_normal
    0.00 0.00 TOTAL pgscan_direct_movable
    0.00 0.00 TOTAL zone_reclaim_failed
    0.00 0.00 TOTAL pginodesteal
    0.00 0.00 TOTAL slabs_scanned
    0.00 0.00 TOTAL kswapd_steal
    0.00 0.00 TOTAL kswapd_inodesteal
    0.00 0.00 TOTAL kswapd_low_wmark_hit_quickly
    0.00 0.00 TOTAL kswapd_high_wmark_hit_quickly
    0.00 0.00 TOTAL kswapd_skip_congestion_wait
    1.00 +0.0% 1.00 TOTAL pageoutrun
    0.00 0.00 TOTAL allocstall
    0.00 0.00 TOTAL pgrotated


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