diff options
Diffstat (limited to 'Documentation/lockstat.txt')
| -rw-r--r-- | Documentation/lockstat.txt | 51 |
1 files changed, 33 insertions, 18 deletions
diff --git a/Documentation/lockstat.txt b/Documentation/lockstat.txt index 4ba4664ce5c3..9cb9138f7a79 100644 --- a/Documentation/lockstat.txt +++ b/Documentation/lockstat.txt | |||
| @@ -71,35 +71,50 @@ Look at the current lock statistics: | |||
| 71 | 71 | ||
| 72 | # less /proc/lock_stat | 72 | # less /proc/lock_stat |
| 73 | 73 | ||
| 74 | 01 lock_stat version 0.2 | 74 | 01 lock_stat version 0.3 |
| 75 | 02 ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | 75 | 02 ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| 76 | 03 class name con-bounces contentions waittime-min waittime-max waittime-total acq-bounces acquisitions holdtime-min holdtime-max holdtime-total | 76 | 03 class name con-bounces contentions waittime-min waittime-max waittime-total acq-bounces acquisitions holdtime-min holdtime-max holdtime-total |
| 77 | 04 ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | 77 | 04 ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| 78 | 05 | 78 | 05 |
| 79 | 06 &inode->i_data.tree_lock-W: 15 21657 0.18 1093295.30 11547131054.85 58 10415 0.16 87.51 6387.60 | 79 | 06 &mm->mmap_sem-W: 233 538 18446744073708 22924.27 607243.51 1342 45806 1.71 8595.89 1180582.34 |
| 80 | 07 &inode->i_data.tree_lock-R: 0 0 0.00 0.00 0.00 23302 231198 0.25 8.45 98023.38 | 80 | 07 &mm->mmap_sem-R: 205 587 18446744073708 28403.36 731975.00 1940 412426 0.58 187825.45 6307502.88 |
| 81 | 08 -------------------------- | 81 | 08 --------------- |
| 82 | 09 &inode->i_data.tree_lock 0 [<ffffffff8027c08f>] add_to_page_cache+0x5f/0x190 | 82 | 09 &mm->mmap_sem 487 [<ffffffff8053491f>] do_page_fault+0x466/0x928 |
| 83 | 10 | 83 | 10 &mm->mmap_sem 179 [<ffffffff802a6200>] sys_mprotect+0xcd/0x21d |
| 84 | 11 ............................................................................................................................................................................................... | 84 | 11 &mm->mmap_sem 279 [<ffffffff80210a57>] sys_mmap+0x75/0xce |
| 85 | 12 | 85 | 12 &mm->mmap_sem 76 [<ffffffff802a490b>] sys_munmap+0x32/0x59 |
| 86 | 13 dcache_lock: 1037 1161 0.38 45.32 774.51 6611 243371 0.15 306.48 77387.24 | 86 | 13 --------------- |
| 87 | 14 ----------- | 87 | 14 &mm->mmap_sem 270 [<ffffffff80210a57>] sys_mmap+0x75/0xce |
| 88 | 15 dcache_lock 180 [<ffffffff802c0d7e>] sys_getcwd+0x11e/0x230 | 88 | 15 &mm->mmap_sem 431 [<ffffffff8053491f>] do_page_fault+0x466/0x928 |
| 89 | 16 dcache_lock 165 [<ffffffff802c002a>] d_alloc+0x15a/0x210 | 89 | 16 &mm->mmap_sem 138 [<ffffffff802a490b>] sys_munmap+0x32/0x59 |
| 90 | 17 dcache_lock 33 [<ffffffff8035818d>] _atomic_dec_and_lock+0x4d/0x70 | 90 | 17 &mm->mmap_sem 145 [<ffffffff802a6200>] sys_mprotect+0xcd/0x21d |
| 91 | 18 dcache_lock 1 [<ffffffff802beef8>] shrink_dcache_parent+0x18/0x130 | 91 | 18 |
| 92 | 19 ............................................................................................................................................................................................... | ||
| 93 | 20 | ||
| 94 | 21 dcache_lock: 621 623 0.52 118.26 1053.02 6745 91930 0.29 316.29 118423.41 | ||
| 95 | 22 ----------- | ||
| 96 | 23 dcache_lock 179 [<ffffffff80378274>] _atomic_dec_and_lock+0x34/0x54 | ||
| 97 | 24 dcache_lock 113 [<ffffffff802cc17b>] d_alloc+0x19a/0x1eb | ||
| 98 | 25 dcache_lock 99 [<ffffffff802ca0dc>] d_rehash+0x1b/0x44 | ||
| 99 | 26 dcache_lock 104 [<ffffffff802cbca0>] d_instantiate+0x36/0x8a | ||
| 100 | 27 ----------- | ||
| 101 | 28 dcache_lock 192 [<ffffffff80378274>] _atomic_dec_and_lock+0x34/0x54 | ||
| 102 | 29 dcache_lock 98 [<ffffffff802ca0dc>] d_rehash+0x1b/0x44 | ||
| 103 | 30 dcache_lock 72 [<ffffffff802cc17b>] d_alloc+0x19a/0x1eb | ||
| 104 | 31 dcache_lock 112 [<ffffffff802cbca0>] d_instantiate+0x36/0x8a | ||
| 92 | 105 | ||
| 93 | This excerpt shows the first two lock class statistics. Line 01 shows the | 106 | This excerpt shows the first two lock class statistics. Line 01 shows the |
| 94 | output version - each time the format changes this will be updated. Line 02-04 | 107 | output version - each time the format changes this will be updated. Line 02-04 |
| 95 | show the header with column descriptions. Lines 05-10 and 13-18 show the actual | 108 | show the header with column descriptions. Lines 05-18 and 20-31 show the actual |
| 96 | statistics. These statistics come in two parts; the actual stats separated by a | 109 | statistics. These statistics come in two parts; the actual stats separated by a |
| 97 | short separator (line 08, 14) from the contention points. | 110 | short separator (line 08, 13) from the contention points. |
| 98 | 111 | ||
| 99 | The first lock (05-10) is a read/write lock, and shows two lines above the | 112 | The first lock (05-18) is a read/write lock, and shows two lines above the |
| 100 | short separator. The contention points don't match the column descriptors, | 113 | short separator. The contention points don't match the column descriptors, |
| 101 | they have two: contentions and [<IP>] symbol. | 114 | they have two: contentions and [<IP>] symbol. The second set of contention |
| 115 | points are the points we're contending with. | ||
| 102 | 116 | ||
| 117 | The integer part of the time values is in us. | ||
| 103 | 118 | ||
| 104 | View the top contending locks: | 119 | View the top contending locks: |
| 105 | 120 | ||