From: Tomasz Chmielewski <mangoo@wpkg.org>
To: Chris Mason <chris.mason@oracle.com>
Cc: linux-btrfs <linux-btrfs@vger.kernel.org>
Subject: Re: Interesting problem with write data.
Date: Thu, 18 Nov 2010 15:57:34 +0100 [thread overview]
Message-ID: <4CE53EDE.0@wpkg.org> (raw)
In-Reply-To: <1290090160-sup-1717@think>
On 18.11.2010 15:23, Chris Mason wrote:
> Excerpts from Tomasz Chmielewski's message of 2010-11-18 07:03:31 -0500:
>>> Recently, I made a btrfs to use. And I met slowness problem. Trying
>>> to diag it. I found this:
>>> 1. dd if=/dev/zero of=test count=1024 bs=1MB
>>> This is fast, at about 25MB/s, and reasonable iowait.
>>> 2. dd if=/dev/zero of=test count=1 bs=1GB
>>> This is pretty slow, at about 1.5MB/s, and 90%+ iowait, constantly.
>>> May I know why it works like this? Thanks.
>>
>> Reproducible here to some extent with 2.6.37-rc2.
>>
>> Interesting is, it only happens for me when I mount the filesystem, dd a smaller file, then a bigger one, in that order.
>>
>> Any subsequent dd / sync / rm usage doesn't seem to trigger it anymore (have to umount / mount again to trigger this).
>
> I'm going to guess this is the flushing threads, could you please run
> vmstat and see if there is a stream of reads?
I guess you meant this during the second dd run:
# vmstat -p /dev/sdb4 1
sdb4 reads read sectors writes requested writes
95130 802552 88431 76340880
95288 803880 88431 76340880
95439 805144 88431 76340880
95574 806288 88431 76340880
95671 807112 88431 76340880
95777 807984 88431 76340880
95925 809232 88431 76340880
96143 811072 88431 76340880
96293 812344 88431 76340880
(...)
> sysrq-w during the second dd would show it as well.
[27821.905901] SysRq : Show Blocked State
[27821.905906] task PC stack pid father
[27821.905949] btrfs-transac D ffff88050cf01a58 0 7969 2 0x00000000
[27821.905954] ffff88050f2e5ac0 0000000000000046 29ea5679c098e259 ffff88050f2e5fd8
[27821.905959] 00000000000139c0 00000000000139c0 ffff88050f2e5fd8 ffff88050f2e5fd8
[27821.905963] 00000000000139c0 ffff88050cf01a58 ffff88050cf01a60 ffff88050cf016c0
[27821.905968] Call Trace:
[27821.905977] [<ffffffff8159fc4e>] io_schedule+0x5e/0xa0
[27821.905982] [<ffffffff81109f15>] sync_page+0x45/0x60
[27821.905987] [<ffffffff815a03da>] __wait_on_bit_lock+0x5a/0xb0
[27821.905990] [<ffffffff81109ed0>] ? sync_page+0x0/0x60
[27821.905994] [<ffffffff81109e9a>] __lock_page+0x6a/0x80
[27821.905999] [<ffffffff81085e40>] ? wake_bit_function+0x0/0x40
[27821.906004] [<ffffffff81115277>] ? pagevec_lookup_tag+0x27/0x40
[27821.906031] [<ffffffffa023e8c3>] extent_write_cache_pages+0x1a3/0x2d0 [btrfs]
[27821.906047] [<ffffffffa023e370>] ? flush_write_bio+0x0/0x10 [btrfs]
[27821.906063] [<ffffffffa02425a0>] ? __extent_writepage+0x0/0x610 [btrfs]
[27821.906079] [<ffffffffa023ea44>] extent_writepages+0x54/0x70 [btrfs]
[27821.906095] [<ffffffffa022c210>] ? btrfs_get_extent+0x0/0x830 [btrfs]
[27821.906111] [<ffffffffa0223a88>] btrfs_writepages+0x28/0x30 [btrfs]
[27821.906115] [<ffffffff81114261>] do_writepages+0x21/0x40
[27821.906118] [<ffffffff8110a4de>] __filemap_fdatawrite_range+0x5e/0x70
[27821.906122] [<ffffffff8110aa2c>] filemap_flush+0x1c/0x20
[27821.906138] [<ffffffffa023dd52>] btrfs_run_ordered_operations+0x192/0x200 [btrfs]
[27821.906154] [<ffffffffa0221791>] btrfs_commit_transaction+0x71/0x620 [btrfs]
[27821.906158] [<ffffffff815a067e>] ? mutex_lock+0x1e/0x50
[27821.906162] [<ffffffff81085e00>] ? autoremove_wake_function+0x0/0x40
[27821.906177] [<ffffffffa021c4f2>] transaction_kthread+0x242/0x250 [btrfs]
[27821.906191] [<ffffffffa021c2b0>] ? transaction_kthread+0x0/0x250 [btrfs]
[27821.906195] [<ffffffff81085727>] kthread+0x97/0xa0
[27821.906200] [<ffffffff8100cf24>] kernel_thread_helper+0x4/0x10
[27821.906204] [<ffffffff81085690>] ? kthread+0x0/0xa0
[27821.906207] [<ffffffff8100cf20>] ? kernel_thread_helper+0x0/0x10
[27821.906210] flush-btrfs-6 D ffff8805c9bf5e98 0 8028 2 0x00000000
[27821.906215] ffff8805b889d6c0 0000000000000046 ffff8805b889d680 ffff8805b889dfd8
[27821.906219] 00000000000139c0 00000000000139c0 ffff8805b889dfd8 ffff8805b889dfd8
[27821.906223] 00000000000139c0 ffff8805c9bf5e98 ffff8805c9bf5ea0 ffff8805c9bf5b00
[27821.906228] Call Trace:
[27821.906240] [<ffffffffa020d31e>] wait_block_group_cache_progress+0xde/0x110 [btrfs]
[27821.906245] [<ffffffff81085e00>] ? autoremove_wake_function+0x0/0x40
[27821.906249] [<ffffffff81085e00>] ? autoremove_wake_function+0x0/0x40
[27821.906261] [<ffffffffa0213608>] ? cache_block_group+0x188/0x2b0 [btrfs]
[27821.906274] [<ffffffffa0213b13>] find_free_extent+0x3e3/0xb30 [btrfs]
[27821.906278] [<ffffffff81054e48>] ? finish_task_switch+0x68/0xe0
[27821.906291] [<ffffffffa0212e43>] ? do_chunk_alloc+0x153/0x1d0 [btrfs]
[27821.906304] [<ffffffffa0214315>] btrfs_reserve_extent+0xb5/0x170 [btrfs]
[27821.906320] [<ffffffffa022688b>] cow_file_range+0x19b/0x360 [btrfs]
[27821.906336] [<ffffffffa022d8be>] run_delalloc_range+0x6e/0x80 [btrfs]
[27821.906351] [<ffffffffa0242a3a>] __extent_writepage+0x49a/0x610 [btrfs]
[27821.906356] [<ffffffff812cfe40>] ? radix_tree_gang_lookup_tag_slot+0x90/0xd0
[27821.906360] [<ffffffff8110bde5>] ? find_get_pages_tag+0x45/0xf0
[27821.906376] [<ffffffffa023e928>] extent_write_cache_pages+0x208/0x2d0 [btrfs]
[27821.906392] [<ffffffffa023e370>] ? flush_write_bio+0x0/0x10 [btrfs]
[27821.906407] [<ffffffffa02425a0>] ? __extent_writepage+0x0/0x610 [btrfs]
[27821.906424] [<ffffffffa023ea44>] extent_writepages+0x54/0x70 [btrfs]
[27821.906440] [<ffffffffa022c210>] ? btrfs_get_extent+0x0/0x830 [btrfs]
[27821.906455] [<ffffffffa0223a88>] btrfs_writepages+0x28/0x30 [btrfs]
[27821.906459] [<ffffffff81114261>] do_writepages+0x21/0x40
[27821.906464] [<ffffffff811820ab>] writeback_single_inode+0xab/0x200
[27821.906469] [<ffffffff8118246c>] writeback_sb_inodes+0xdc/0x150
[27821.906473] [<ffffffff81182652>] writeback_inodes_wb+0xd2/0xf0
[27821.906478] [<ffffffff8118286f>] wb_writeback+0x1ff/0x310
[27821.906482] [<ffffffff81182a8d>] wb_do_writeback+0x6d/0xe0
[27821.906486] [<ffffffff81182b00>] ? bdi_writeback_thread+0x0/0x260
[27821.906490] [<ffffffff81182bb3>] bdi_writeback_thread+0xb3/0x260
[27821.906495] [<ffffffff81182b00>] ? bdi_writeback_thread+0x0/0x260
[27821.906499] [<ffffffff81085727>] kthread+0x97/0xa0
[27821.906503] [<ffffffff8100cf24>] kernel_thread_helper+0x4/0x10
[27821.906507] [<ffffffff81085690>] ? kthread+0x0/0xa0
[27821.906510] [<ffffffff8100cf20>] ? kernel_thread_helper+0x0/0x10
[27821.906513] btrfs-cache-8 D ffff88050c5fde98 0 8089 2 0x00000000
[27821.906517] ffff88051c3a9b60 0000000000000046 ffff88051c3a9b00 ffff88051c3a9fd8
[27821.906522] 00000000000139c0 00000000000139c0 ffff88051c3a9fd8 ffff88051c3a9fd8
[27821.906526] 00000000000139c0 ffff88050c5fde98 ffff88050c5fdea0 ffff88050c5fdb00
[27821.906530] Call Trace:
[27821.906534] [<ffffffff8159fc4e>] io_schedule+0x5e/0xa0
[27821.906538] [<ffffffff81109f15>] sync_page+0x45/0x60
[27821.906542] [<ffffffff815a051e>] __wait_on_bit+0x5e/0x90
[27821.906545] [<ffffffff81109ed0>] ? sync_page+0x0/0x60
[27821.906548] [<ffffffff8110a065>] wait_on_page_bit+0x75/0x80
[27821.906553] [<ffffffff81085e40>] ? wake_bit_function+0x0/0x40
[27821.906568] [<ffffffffa023e308>] ? submit_one_bio+0x88/0xa0 [btrfs]
[27821.906584] [<ffffffffa0244348>] read_extent_buffer_pages+0x2b8/0x380 [btrfs]
[27821.906598] [<ffffffffa021c120>] ? btree_get_extent+0x0/0x190 [btrfs]
[27821.906613] [<ffffffffa021d47e>] btree_read_extent_buffer_pages+0x5e/0xc0 [btrfs]
[27821.906630] [<ffffffffa021d55c>] read_tree_block+0x3c/0x60 [btrfs]
[27821.906642] [<ffffffffa0203a08>] read_block_for_search+0xe8/0x1d0 [btrfs]
[27821.906654] [<ffffffffa0208993>] btrfs_search_slot+0x3d3/0x600 [btrfs]
[27821.906666] [<ffffffffa0211193>] caching_kthread+0x153/0x3e0 [btrfs]
[27821.906679] [<ffffffffa0211040>] ? caching_kthread+0x0/0x3e0 [btrfs]
[27821.906683] [<ffffffff81085727>] kthread+0x97/0xa0
[27821.906687] [<ffffffff8100cf24>] kernel_thread_helper+0x4/0x10
[27821.906691] [<ffffffff81085690>] ? kthread+0x0/0xa0
[27821.906695] [<ffffffff8100cf20>] ? kernel_thread_helper+0x0/0x10
[27821.906698] Sched Debug Version: v0.09, 2.6.37-020637rc2-generic #201011160905
[27821.906701] now at 27832930.981275 msecs
[27821.906703] .jiffies : 4297720589
[27821.906706] .sysctl_sched_latency : 24.000000
[27821.906708] .sysctl_sched_min_granularity : 3.000000
[27821.906710] .sysctl_sched_wakeup_granularity : 4.000000
[27821.906712] .sysctl_sched_child_runs_first : 0
[27821.906714] .sysctl_sched_features : 31855
[27821.906717] .sysctl_sched_tunable_scaling : 1 (logaritmic)
[27821.906720]
[27821.906721] cpu#0, 3073.849 MHz
[27821.906722] .nr_running : 1
[27821.906725] .load : 1024
[27821.906727] .nr_switches : 31602424
[27821.906729] .nr_load_updates : 1233322
[27821.906731] .nr_uninterruptible : 0
[27821.906733] .next_balance : 4297.720590
[27821.906735] .curr->pid : 8056
[27821.906737] .clock : 27821905.756718
[27821.906739] .cpu_load[0] : 0
[27821.906741] .cpu_load[1] : 0
[27821.906743] .cpu_load[2] : 0
[27821.906744] .cpu_load[3] : 4
[27821.906746] .cpu_load[4] : 26
[27821.906748] .yld_count : 19611
[27821.906750] .sched_switch : 0
[27821.906752] .sched_count : 50345565
[27821.906754] .sched_goidle : 14570774
[27821.906756] .avg_idle : 875098
[27821.906758] .ttwu_count : 16130569
[27821.906760] .ttwu_local : 4655514
[27821.906762] .bkl_count : 0
[27821.906765]
[27821.906765] cfs_rq[0]:/
[27821.906767] .exec_clock : 2537027.925314
[27821.906770] .MIN_vruntime : 0.000001
[27821.906772] .min_vruntime : 1983458.623883
[27821.906774] .max_vruntime : 0.000001
[27821.906776] .spread : 0.000000
[27821.906778] .spread0 : 0.000000
[27821.906780] .nr_running : 1
[27821.906783] .load : 1024
[27821.906785] .nr_spread_over : 11
[27821.906786] .shares : 0
[27821.906789]
[27821.906789] rt_rq[0]:/
[27821.906791] .rt_nr_running : 0
[27821.906793] .rt_throttled : 0
[27821.906795] .rt_time : 0.000000
[27821.906797] .rt_runtime : 950.000000
[27821.906799]
[27821.906800] runnable tasks:
[27821.906801] task PID tree-key switches prio exec-runtime sum-exec sum-sleep
[27821.906802] ----------------------------------------------------------------------------------------------------------
[27821.906820] R bash 8056 1983446.623883 56 120 1983446.623883 12.115923 33377.263784 /
[27821.906828]
[27821.906829] cpu#1, 3073.849 MHz
[27821.906831] .nr_running : 0
[27821.906833] .load : 0
[27821.906835] .nr_switches : 13412412
[27821.906837] .nr_load_updates : 499440
[27821.906839] .nr_uninterruptible : 0
[27821.906841] .next_balance : 4297.720590
[27821.906843] .curr->pid : 0
[27821.906845] .clock : 27821905.768860
[27821.906847] .cpu_load[0] : 0
[27821.906849] .cpu_load[1] : 0
[27821.906850] .cpu_load[2] : 0
[27821.906852] .cpu_load[3] : 0
[27821.906854] .cpu_load[4] : 0
[27821.906856] .yld_count : 14079
[27821.906858] .sched_switch : 0
[27821.906860] .sched_count : 13912141
[27821.906862] .sched_goidle : 6345593
[27821.906864] .avg_idle : 776881
[27821.906866] .ttwu_count : 6900627
[27821.906867] .ttwu_local : 2420071
[27821.906869] .bkl_count : 0
[27821.906871]
[27821.906872] cfs_rq[1]:/
[27821.906874] .exec_clock : 1416231.470534
[27821.906876] .MIN_vruntime : 0.000001
[27821.906878] .min_vruntime : 1862178.757372
[27821.906880] .max_vruntime : 0.000001
[27821.906883] .spread : 0.000000
[27821.906885] .spread0 : -121279.866511
[27821.906887] .nr_running : 0
[27821.906889] .load : 0
[27821.906891] .nr_spread_over : 7
[27821.906892] .shares : 0
[27821.906894]
[27821.906895] rt_rq[1]:/
[27821.906897] .rt_nr_running : 0
[27821.906898] .rt_throttled : 0
[27821.906900] .rt_time : 0.000000
[27821.906903] .rt_runtime : 950.000000
[27821.906905]
[27821.906905] runnable tasks:
[27821.906906] task PID tree-key switches prio exec-runtime sum-exec sum-sleep
[27821.906908] ----------------------------------------------------------------------------------------------------------
[27821.906925]
[27821.906925] cpu#2, 3073.849 MHz
[27821.906927] .nr_running : 0
[27821.906929] .load : 0
[27821.906931] .nr_switches : 5352740
[27821.906933] .nr_load_updates : 226631
[27821.906935] .nr_uninterruptible : 0
[27821.906937] .next_balance : 4297.720518
[27821.906939] .curr->pid : 0
[27821.906941] .clock : 27821899.402595
[27821.906943] .cpu_load[0] : 0
[27821.906944] .cpu_load[1] : 0
[27821.906946] .cpu_load[2] : 0
[27821.906948] .cpu_load[3] : 0
[27821.906950] .cpu_load[4] : 0
[27821.906952] .yld_count : 12852
[27821.906954] .sched_switch : 0
[27821.906955] .sched_count : 97641962
[27821.906957] .sched_goidle : 2593371
[27821.906959] .avg_idle : 1000000
[27821.906961] .ttwu_count : 2720117
[27821.906963] .ttwu_local : 1211500
[27821.906965] .bkl_count : 0
[27821.906967]
[27821.906968] cfs_rq[2]:/
[27821.906969] .exec_clock : 539665.750622
[27821.906972] .MIN_vruntime : 0.000001
[27821.906974] .min_vruntime : 979243.698927
[27821.906976] .max_vruntime : 0.000001
[27821.906978] .spread : 0.000000
[27821.906980] .spread0 : -1004214.924956
[27821.906982] .nr_running : 0
[27821.906984] .load : 0
[27821.906986] .nr_spread_over : 2
[27821.906988] .shares : 0
[27821.906990]
[27821.906990] rt_rq[2]:/
[27821.906992] .rt_nr_running : 0
[27821.906994] .rt_throttled : 0
[27821.906996] .rt_time : 0.000000
[27821.906998] .rt_runtime : 950.000000
[27821.907000]
[27821.907000] runnable tasks:
[27821.907001] task PID tree-key switches prio exec-runtime sum-exec sum-sleep
[27821.907003] ----------------------------------------------------------------------------------------------------------
[27821.907020]
[27821.907020] cpu#3, 3073.849 MHz
[27821.907022] .nr_running : 0
[27821.907024] .load : 0
[27821.907026] .nr_switches : 4338722
[27821.907028] .nr_load_updates : 185831
[27821.907030] .nr_uninterruptible : 1
[27821.907032] .next_balance : 4297.720522
[27821.907034] .curr->pid : 0
[27821.907036] .clock : 27821898.870612
[27821.907038] .cpu_load[0] : 0
[27821.907040] .cpu_load[1] : 0
[27821.907041] .cpu_load[2] : 0
[27821.907043] .cpu_load[3] : 0
[27821.907045] .cpu_load[4] : 0
[27821.907047] .yld_count : 9927
[27821.907049] .sched_switch : 0
[27821.907051] .sched_count : 4384763
[27821.907053] .sched_goidle : 2134236
[27821.907055] .avg_idle : 1000000
[27821.907056] .ttwu_count : 2186291
[27821.907058] .ttwu_local : 1326886
[27821.907060] .bkl_count : 0
[27821.907062]
[27821.907063] cfs_rq[3]:/
[27821.907065] .exec_clock : 390748.348572
[27821.907067] .MIN_vruntime : 0.000001
[27821.907069] .min_vruntime : 448271.166097
[27821.907071] .max_vruntime : 0.000001
[27821.907073] .spread : 0.000000
[27821.907076] .spread0 : -1535187.457786
[27821.907078] .nr_running : 0
[27821.907079] .load : 0
[27821.907081] .nr_spread_over : 0
[27821.907083] .shares : 0
[27821.907085]
[27821.907086] rt_rq[3]:/
[27821.907087] .rt_nr_running : 0
[27821.907089] .rt_throttled : 0
[27821.907091] .rt_time : 0.000000
[27821.907093] .rt_runtime : 950.000000
[27821.907095]
[27821.907096] runnable tasks:
[27821.907097] task PID tree-key switches prio exec-runtime sum-exec sum-sleep
[27821.907098] ----------------------------------------------------------------------------------------------------------
[27821.907115]
[27821.907116] cpu#4, 3073.849 MHz
[27821.907117] .nr_running : 0
[27821.907119] .load : 0
[27821.907121] .nr_switches : 24842999
[27821.907123] .nr_load_updates : 1379012
[27821.907125] .nr_uninterruptible : 1
[27821.907127] .next_balance : 4297.720589
[27821.907129] .curr->pid : 0
[27821.907131] .clock : 27821905.758645
[27821.907133] .cpu_load[0] : 0
[27821.907135] .cpu_load[1] : 0
[27821.907137] .cpu_load[2] : 0
[27821.907139] .cpu_load[3] : 0
[27821.907140] .cpu_load[4] : 0
[27821.907142] .yld_count : 2300
[27821.907144] .sched_switch : 0
[27821.907146] .sched_count : 65229040
[27821.907148] .sched_goidle : 11461698
[27821.907150] .avg_idle : 887631
[27821.907152] .ttwu_count : 12710203
[27821.907154] .ttwu_local : 5179927
[27821.907156] .bkl_count : 0
[27821.907158]
[27821.907158] cfs_rq[4]:/
[27821.907160] .exec_clock : 1848261.240989
[27821.907162] .MIN_vruntime : 0.000001
[27821.907165] .min_vruntime : 1286897.532002
[27821.907167] .max_vruntime : 0.000001
[27821.907169] .spread : 0.000000
[27821.907171] .spread0 : -696561.091881
[27821.907173] .nr_running : 0
[27821.907175] .load : 0
[27821.907177] .nr_spread_over : 18
[27821.907179] .shares : 0
[27821.907181]
[27821.907181] rt_rq[4]:/
[27821.907183] .rt_nr_running : 0
[27821.907185] .rt_throttled : 0
[27821.907187] .rt_time : 0.000000
[27821.907189] .rt_runtime : 950.000000
[27821.907191]
[27821.907192] runnable tasks:
[27821.907192] task PID tree-key switches prio exec-runtime sum-exec sum-sleep
[27821.907194] ----------------------------------------------------------------------------------------------------------
[27821.907211]
[27821.907212] cpu#5, 3073.849 MHz
[27821.907213] .nr_running : 0
[27821.907215] .load : 0
[27821.907217] .nr_switches : 7485077
[27821.907219] .nr_load_updates : 343812
[27821.907221] .nr_uninterruptible : 1
[27821.907223] .next_balance : 4297.720533
[27821.907225] .curr->pid : 0
[27821.907227] .clock : 27821905.227220
[27821.907229] .cpu_load[0] : 0
[27821.907231] .cpu_load[1] : 0
[27821.907233] .cpu_load[2] : 2
[27821.907235] .cpu_load[3] : 14
[27821.907237] .cpu_load[4] : 20
[27821.907239] .yld_count : 1593
[27821.907241] .sched_switch : 0
[27821.907242] .sched_count : 7578803
[27821.907244] .sched_goidle : 3586457
[27821.907246] .avg_idle : 1000000
[27821.907248] .ttwu_count : 3791131
[27821.907250] .ttwu_local : 2276119
[27821.907252] .bkl_count : 0
[27821.907254]
[27821.907254] cfs_rq[5]:/
[27821.907256] .exec_clock : 834916.137534
[27821.907259] .MIN_vruntime : 0.000001
[27821.907261] .min_vruntime : 1947261.991735
[27821.907263] .max_vruntime : 0.000001
[27821.907265] .spread : 0.000000
[27821.907267] .spread0 : -36196.632148
[27821.907269] .nr_running : 0
[27821.907271] .load : 0
[27821.907273] .nr_spread_over : 258
[27821.907275] .shares : 0
[27821.907277]
[27821.907277] rt_rq[5]:/
[27821.907279] .rt_nr_running : 0
[27821.907281] .rt_throttled : 0
[27821.907283] .rt_time : 0.000000
[27821.907285] .rt_runtime : 950.000000
[27821.907287]
[27821.907288] runnable tasks:
[27821.907288] task PID tree-key switches prio exec-runtime sum-exec sum-sleep
[27821.907290] ----------------------------------------------------------------------------------------------------------
[27821.907307]
[27821.907308] cpu#6, 3073.849 MHz
[27821.907309] .nr_running : 0
[27821.907311] .load : 0
[27821.907313] .nr_switches : 4594609
[27821.907315] .nr_load_updates : 195127
[27821.907317] .nr_uninterruptible : 0
[27821.907319] .next_balance : 4297.720586
[27821.907321] .curr->pid : 0
[27821.907323] .clock : 27821865.850588
[27821.907325] .cpu_load[0] : 0
[27821.907327] .cpu_load[1] : 0
[27821.907329] .cpu_load[2] : 0
[27821.907330] .cpu_load[3] : 0
[27821.907332] .cpu_load[4] : 0
[27821.907334] .yld_count : 3353
[27821.907336] .sched_switch : 0
[27821.907338] .sched_count : 65086942
[27821.907340] .sched_goidle : 2242685
[27821.907342] .avg_idle : 1000000
[27821.907344] .ttwu_count : 2306870
[27821.907346] .ttwu_local : 1594375
[27821.907348] .bkl_count : 0
[27821.907349]
[27821.907350] cfs_rq[6]:/
[27821.907352] .exec_clock : 460353.440029
[27821.907354] .MIN_vruntime : 0.000001
[27821.907356] .min_vruntime : 441798.411668
[27821.907358] .max_vruntime : 0.000001
[27821.907360] .spread : 0.000000
[27821.907363] .spread0 : -1541660.212215
[27821.907365] .nr_running : 0
[27821.907367] .load : 0
[27821.907368] .nr_spread_over : 129
[27821.907370] .shares : 0
[27821.907372]
[27821.907373] rt_rq[6]:/
[27821.907375] .rt_nr_running : 0
[27821.907376] .rt_throttled : 0
[27821.907379] .rt_time : 0.000000
[27821.907381] .rt_runtime : 950.000000
[27821.907383]
[27821.907383] runnable tasks:
[27821.907384] task PID tree-key switches prio exec-runtime sum-exec sum-sleep
[27821.907386] ----------------------------------------------------------------------------------------------------------
[27821.907402]
[27821.907403] cpu#7, 3073.849 MHz
[27821.907405] .nr_running : 0
[27821.907407] .load : 0
[27821.907409] .nr_switches : 2802446
[27821.907411] .nr_load_updates : 163535
[27821.907413] .nr_uninterruptible : 0
[27821.907415] .next_balance : 4297.720561
[27821.907417] .curr->pid : 0
[27821.907419] .clock : 27821897.359831
[27821.907421] .cpu_load[0] : 1024
[27821.907423] .cpu_load[1] : 512
[27821.907425] .cpu_load[2] : 256
[27821.907426] .cpu_load[3] : 128
[27821.907428] .cpu_load[4] : 64
[27821.907430] .yld_count : 18218
[27821.907432] .sched_switch : 0
[27821.907434] .sched_count : 2840187
[27821.907436] .sched_goidle : 1383917
[27821.907438] .avg_idle : 881625
[27821.907440] .ttwu_count : 1405661
[27821.907442] .ttwu_local : 911128
[27821.907443] .bkl_count : 0
[27821.907445]
[27821.907446] cfs_rq[7]:/
[27821.907448] .exec_clock : 485889.715855
[27821.907450] .MIN_vruntime : 0.000001
[27821.907452] .min_vruntime : 464448.209419
[27821.907454] .max_vruntime : 0.000001
[27821.907457] .spread : 0.000000
[27821.907459] .spread0 : -1519010.414464
[27821.907461] .nr_running : 0
[27821.907462] .load : 0
[27821.907464] .nr_spread_over : 38
[27821.907466] .shares : 0
[27821.907468]
[27821.907469] rt_rq[7]:/
[27821.907471] .rt_nr_running : 0
[27821.907472] .rt_throttled : 0
[27821.907474] .rt_time : 0.000000
[27821.907477] .rt_runtime : 950.000000
[27821.907478]
[27821.907479] runnable tasks:
[27821.907480] task PID tree-key switches prio exec-runtime sum-exec sum-sleep
[27821.907482] ----------------------------------------------------------------------------------------------------------
[27821.907498]
--
Tomasz Chmielewski
http://wpkg.org
next prev parent reply other threads:[~2010-11-18 14:57 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-18 12:03 Interesting problem with write data Tomasz Chmielewski
2010-11-18 14:23 ` Chris Mason
2010-11-18 14:57 ` Tomasz Chmielewski [this message]
2010-11-18 15:07 ` Chris Mason
2010-11-18 15:39 ` Tomasz Chmielewski
2010-11-18 15:54 ` Chris Mason
2010-11-18 16:00 ` Tomasz Chmielewski
2010-11-18 16:07 ` Chris Mason
-- strict thread matches above, loose matches on Subject: below --
2010-11-18 6:19 Magicloud Magiclouds
2010-11-18 10:36 ` Wout Mertens
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4CE53EDE.0@wpkg.org \
--to=mangoo@wpkg.org \
--cc=chris.mason@oracle.com \
--cc=linux-btrfs@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.