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authorRusty Russell <rusty@rustcorp.com.au>2008-12-31 07:35:57 -0500
committerRusty Russell <rusty@rustcorp.com.au>2008-12-31 07:35:57 -0500
commit2ca1a615835d9f4990f42102ab1f2ef434e7e89c (patch)
tree726cf3d5f29a6c66c44e4bd68e7ebed2fd83d059 /Documentation/lockstat.txt
parente12f0102ac81d660c9f801d0a0e10ccf4537a9de (diff)
parent6a94cb73064c952255336cc57731904174b2c58f (diff)
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Conflicts: arch/x86/kernel/io_apic.c
Diffstat (limited to 'Documentation/lockstat.txt')
-rw-r--r--Documentation/lockstat.txt51
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
7401 lock_stat version 0.2 7401 lock_stat version 0.3
7502 ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- 7502 -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
7603 class name con-bounces contentions waittime-min waittime-max waittime-total acq-bounces acquisitions holdtime-min holdtime-max holdtime-total 7603 class name con-bounces contentions waittime-min waittime-max waittime-total acq-bounces acquisitions holdtime-min holdtime-max holdtime-total
7704 ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- 7704 -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
7805 7805
7906 &inode->i_data.tree_lock-W: 15 21657 0.18 1093295.30 11547131054.85 58 10415 0.16 87.51 6387.60 7906 &mm->mmap_sem-W: 233 538 18446744073708 22924.27 607243.51 1342 45806 1.71 8595.89 1180582.34
8007 &inode->i_data.tree_lock-R: 0 0 0.00 0.00 0.00 23302 231198 0.25 8.45 98023.38 8007 &mm->mmap_sem-R: 205 587 18446744073708 28403.36 731975.00 1940 412426 0.58 187825.45 6307502.88
8108 -------------------------- 8108 ---------------
8209 &inode->i_data.tree_lock 0 [<ffffffff8027c08f>] add_to_page_cache+0x5f/0x190 8209 &mm->mmap_sem 487 [<ffffffff8053491f>] do_page_fault+0x466/0x928
8310 8310 &mm->mmap_sem 179 [<ffffffff802a6200>] sys_mprotect+0xcd/0x21d
8411 ............................................................................................................................................................................................... 8411 &mm->mmap_sem 279 [<ffffffff80210a57>] sys_mmap+0x75/0xce
8512 8512 &mm->mmap_sem 76 [<ffffffff802a490b>] sys_munmap+0x32/0x59
8613 dcache_lock: 1037 1161 0.38 45.32 774.51 6611 243371 0.15 306.48 77387.24 8613 ---------------
8714 ----------- 8714 &mm->mmap_sem 270 [<ffffffff80210a57>] sys_mmap+0x75/0xce
8815 dcache_lock 180 [<ffffffff802c0d7e>] sys_getcwd+0x11e/0x230 8815 &mm->mmap_sem 431 [<ffffffff8053491f>] do_page_fault+0x466/0x928
8916 dcache_lock 165 [<ffffffff802c002a>] d_alloc+0x15a/0x210 8916 &mm->mmap_sem 138 [<ffffffff802a490b>] sys_munmap+0x32/0x59
9017 dcache_lock 33 [<ffffffff8035818d>] _atomic_dec_and_lock+0x4d/0x70 9017 &mm->mmap_sem 145 [<ffffffff802a6200>] sys_mprotect+0xcd/0x21d
9118 dcache_lock 1 [<ffffffff802beef8>] shrink_dcache_parent+0x18/0x130 9118
9219 ...............................................................................................................................................................................................
9320
9421 dcache_lock: 621 623 0.52 118.26 1053.02 6745 91930 0.29 316.29 118423.41
9522 -----------
9623 dcache_lock 179 [<ffffffff80378274>] _atomic_dec_and_lock+0x34/0x54
9724 dcache_lock 113 [<ffffffff802cc17b>] d_alloc+0x19a/0x1eb
9825 dcache_lock 99 [<ffffffff802ca0dc>] d_rehash+0x1b/0x44
9926 dcache_lock 104 [<ffffffff802cbca0>] d_instantiate+0x36/0x8a
10027 -----------
10128 dcache_lock 192 [<ffffffff80378274>] _atomic_dec_and_lock+0x34/0x54
10229 dcache_lock 98 [<ffffffff802ca0dc>] d_rehash+0x1b/0x44
10330 dcache_lock 72 [<ffffffff802cc17b>] d_alloc+0x19a/0x1eb
10431 dcache_lock 112 [<ffffffff802cbca0>] d_instantiate+0x36/0x8a
92 105
93This excerpt shows the first two lock class statistics. Line 01 shows the 106This excerpt shows the first two lock class statistics. Line 01 shows the
94output version - each time the format changes this will be updated. Line 02-04 107output version - each time the format changes this will be updated. Line 02-04
95show the header with column descriptions. Lines 05-10 and 13-18 show the actual 108show the header with column descriptions. Lines 05-18 and 20-31 show the actual
96statistics. These statistics come in two parts; the actual stats separated by a 109statistics. These statistics come in two parts; the actual stats separated by a
97short separator (line 08, 14) from the contention points. 110short separator (line 08, 13) from the contention points.
98 111
99The first lock (05-10) is a read/write lock, and shows two lines above the 112The first lock (05-18) is a read/write lock, and shows two lines above the
100short separator. The contention points don't match the column descriptors, 113short separator. The contention points don't match the column descriptors,
101they have two: contentions and [<IP>] symbol. 114they have two: contentions and [<IP>] symbol. The second set of contention
115points are the points we're contending with.
102 116
117The integer part of the time values is in us.
103 118
104View the top contending locks: 119View the top contending locks:
105 120
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-26 04:24:08 -0500