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SubjectSome 2.4.9 vs. 2.4.10 results
Hi all,

I just thought I'd pop in my two cents on this whole topic. In short
form, on my Alpha GS80 (8 CPUs, 8 GB, 40 U160 disks/4x2channel adapters,
2 NUMA nodes) 2.4.9 is almost unusable while 2.4.10 flies quite nicely.
Under 2.4.9 even things as simple as a mke2fs on a single 18 GB drive
took minutes, while under 2.4.10 only seconds. When I say 2.4.10, it's
actually 2.4.10+the vm_tweak patch.

I'm attaching a copy of the results of an AIM VII "shared" run as well as
a lockstat report from a 500 user datapoint under 2.4.10. If there is
desire, I can generate a lockstat report for 2.4.9 as well. I'm also
going to see if I can get our profiling package to work on this system
again, and if so I'll forward along those results as well.

And not to bring up another old string, but just for giggles I removed
the lock_kernel()/unlock_kernel() in llseek() to see what came of it.
In short, a 2.2% gain in throughput and nearly 50% drop in the amount of
time the kernel_lock is taken under this load. Definitely looking
forward to 2.5. ;) Anyway, if there is something else anyone would be
interested in that would be useful to run under this load (or a
different set of statistics), feel free to let me know.

- Pete
Column explanation:
Tasks: the number of "users" simulated, roughly a load factor
Jobs/Min: the "throughput" of the system at this load
JTI: a mathematical calculation of the fairness of the scheduler
Real: amount of "wall" time this load took to complete
CPU: amount of "CPU" time this load took to complete
J/S/T: stands for "Jobs per Second per Task"
user: reported user-space time in seconds
sys: reported system (i.e. kernel) time in seconds
idle/wait: reported "other" time in seconds (mostly disk wait)
The test stops when the "Tasks" column exceeds the "Jobs/Min" column - what AIM calls "crossover". I didn't use the "adaptive" timer which finds the exact crossover, as that's not what I was looking for.

Linux 2.4.9
-----------
Benchmark Version Machine Run Date
AIM Multiuser Benchmark - Suite VII "1.0" sundown2 Oct 2 07:47:40 2001

Tasks Jobs/Min JTI Real CPU J/S/T user sys idle/wait
1 11.8 100 492.0 10.9 0.1972 1.4 16.7 3917.9
500 2801.9 97 1038.6 7724.7 0.0934 701.0 7049.8 558.0
1000 1584.9 97 3672.2 20877.7 0.0264 1403.5 19525.2 8448.7
1500 977.3 98 8932.7 40021.1 0.0109 2118.2 37992.6 31350.9

Linux 2.4.10
------------
Benchmark Version Machine Run Date
AIM Multiuser Benchmark - Suite VII "1.0" sundown2 Oct 1 15:19:53 2001

Tasks Jobs/Min JTI Real CPU J/S/T user sys idle/wait
1 45.3 100 128.3 4.2 0.7558 1.4 4.0 1021.4
500 9365.5 97 310.7 1983.8 0.3122 683.7 1301.3 500.7
1000 4250.0 98 1369.4 6144.7 0.0708 1384.7 4772.7 4798.0
1500 4022.7 98 2170.2 9567.2 0.0447 2077.3 7531.2 7752.9
2000 2832.5 98 4109.4 14865.7 0.0236 2773.5 12142.4 17959.6
2500 1881.5 98 7733.4 20815.3 0.0125 3482.7 17349.2 41035.0
System: Linux sundown2.zk3.dec.com 2.4.10 #1 SMP Mon Oct 1 12:53:08 EST 2001 alpha
Total counts
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
SPINLOCKS HOLD WAIT
UTIL CON MEAN( MAX ) MEAN( MAX )(% CPU) TOTAL NOWAIT SPIN RJECT NAME

5.1% 6.5us(3348ms) 128us(2187ms)(0.00%) 150957750 94.9% 5.1% 0% *TOTAL*

0.00% 1.4% 0.6us( 59ms) 14us( 66ms)(0.00%) 5802063 98.6% 1.4% 0% dcache_lock
0.00% 2.2% 0.1us( 18us) 8.8us( 801us)(0.00%) 117683 97.8% 2.2% 0% d_alloc+0x1b4
0.00% 3.4% 0.2us( 183us) 8.2us( 954us)(0.00%) 121495 96.6% 3.4% 0% d_delete+0x30
0.00% 0.02% 0.3us( 2.6us) 9.9us( 18us)(0.00%) 8937 100% 0.02% 0% d_delete+0x10c
0.00% 2.9% 0.1us( 201us) 8.3us(2212us)(0.00%) 239178 97.1% 2.9% 0% d_instantiate+0x6c
0.00% 1.8% 0.8us( 59ms) 14us( 59ms)(0.00%) 3799941 98.2% 1.8% 0% d_lookup+0x8c
0.00% 0.10% 0.1us( 8.6us) 8.5us( 93us)(0.00%) 117183 100% 0.10% 0% d_rehash+0xa0
0.00% 0% 0.1us( 1.5us) 0us 936 100% 0% 0% d_unhash+0x8c
0.00% 6.1% 0.7us( 4.0us) 8.2us( 46us)(0.00%) 1501 93.9% 6.1% 0% path_walk+0x170
0.00% 0.05% 0.4us( 57ms) 15us( 401us)(0.00%) 1298224 100% 0.05% 0% path_walk+0x3cc
0.00% 0% 0.2us( 9.3us) 0us 897 100% 0% 0% path_walk+0x6a0
0.00% 0% 1.2us( 3.1us) 0us 78 100% 0% 0% path_walk+0x8fc
0.00% 0% 11us( 222us) 0us 624 100% 0% 0% prune_dcache+0x3c
0.00% 0% 0.6us( 41ms) 0us 87949 100% 0% 0% prune_dcache+0x240
0.00% 0% 45us( 323us) 0us 936 100% 0% 0% select_parent+0x38
0.00% 2.4% 2.4us( 18us) 714us( 66ms)(0.00%) 6501 97.6% 2.4% 0% sys_getcwd+0x16c

0.00% 1.5% 2.1us( 71us) 3.9us( 49us)(0.00%) 2286450 98.5% 1.5% 0% device_request_lock
0.00% 2.4% 0.4us( 5.1us) 4.1us( 49us)(0.00%) 1143120 97.6% 2.4% 0% __scsi_release_command+0x38
0.00% 0.57% 3.9us( 71us) 2.8us( 7.1us)(0.00%) 1143330 99.4% 0.57% 0% scsi_allocate_device+0x70

0.00% 1.9% 0.5us( 31ms) 7.7us( 31ms)(0.00%) 2436724 98.1% 1.9% 0% files_lock
0.00% 2.2% 0.1us(3084us) 5.6us(1076us)(0.00%) 812209 97.8% 2.2% 0% file_move+0x38
0.00% 2.2% 0.2us( 350us) 10us( 31ms)(0.00%) 800474 97.8% 2.2% 0% fput+0x10c
0.00% 1.3% 1.1us( 31ms) 6.3us(2052us)(0.00%) 811100 98.7% 1.3% 0% get_empty_filp+0x30
0.00% 1.1% 0.9us( 4.9us) 5.4us( 15us)(0.00%) 2323 98.9% 1.1% 0% get_empty_filp+0x14c
0.00% 0.28% 0.1us( 6.4us) 7.7us( 17us)(0.00%) 10618 99.7% 0.28% 0% put_filp+0x4c

0.00% 1.5% 0.8us(1458us) 5.0us(5681us)(0.00%) 3165251 98.5% 1.5% 0% inode_lock
0.00% 2.3% 0.2us( 724us) 5.0us(5681us)(0.00%) 1140118 97.7% 2.3% 0% __mark_inode_dirty+0x6c
0.00% 0.69% 0.1us(1458us) 6.4us(1263us)(0.00%) 783000 99.3% 0.69% 0% generic_osync_inode+0x80
0.00% 1.5% 0.2us( 173us) 5.4us( 871us)(0.00%) 83059 98.5% 1.5% 0% get_empty_inode+0x54
0.00% 0.50% 0.4us( 7.1us) 4.0us( 12us)(0.00%) 8404 99.5% 0.50% 0% get_new_inode+0x74
0.00% 0% 5.9us( 37us) 0us 23 100% 0% 0% get_super_to_sync+0x28
0.00% 0.91% 0.5us( 7.0us) 4.0us( 18us)(0.00%) 18624 99.1% 0.91% 0% iget4+0x84
0.00% 1.1% 0.2us( 206us) 4.0us( 19us)(0.00%) 74054 98.9% 1.1% 0% insert_inode_hash+0x78
0.00% 0% 0.5us( 2.3us) 0us 20 100% 0% 0% sync_inodes_sb+0x3c
0.00% 0% 1.4us( 3.0us) 0us 444 100% 0% 0% sync_inodes_sb+0x19c
0.00% 1.8% 10us( 16us) 701us( 701us)(0.00%) 57 98.2% 1.8% 0% sync_unlocked_inodes+0x2c
0.00% 0.27% 2.4us( 184us) 3.6us( 16us)(0.00%) 24414 99.7% 0.27% 0% sync_unlocked_inodes+0x1ac
0.00% 0.11% 0.4us( 472us) 5.3us( 57us)(0.00%) 516517 99.9% 0.11% 0% write_inode_now+0x48
0.00% 2.2% 3.9us(1355us) 4.1us( 510us)(0.00%) 516517 97.8% 2.2% 0% write_inode_now+0x25c

0.00% 12.2% 6.3us( 83us) 13us(1131us)(0.00%) 6911039 87.8% 12.2% 0% io_request_lock
0.00% 6.4% 0.1us( 0.4us) 2.5us( 5.3us)(0.00%) 78 93.6% 6.4% 0% __get_request_wait+0x7c
0.00% 16.0% 6.6us( 36us) 13us( 885us)(0.00%) 1216991 84.0% 16.0% 0% __make_request+0x13c
0.00% 7.4% 14us( 32us) 9.3us( 21us)(0.00%) 352 92.6% 7.4% 0% do_isp1020_intr_handler+0x4c
0.00% 17.5% 10us( 83us) 12us(1131us)(0.00%) 1121137 82.5% 17.5% 0% generic_unplug_device+0x34
0.00% 17.5% 19us( 62us) 13us( 794us)(0.00%) 1142769 82.5% 17.5% 0% scsi_dispatch_cmd+0x140
0.00% 10.5% 8.7us( 23us) 9.4us( 40us)(0.00%) 352 89.5% 10.5% 0% scsi_dispatch_cmd+0x1dc
0.00% 5.2% 0.0us( 2.9us) 13us( 127us)(0.00%) 1142768 94.8% 5.2% 0% scsi_finish_command+0x4c
0.00% 0.28% 0.2us( 8.0us) 5.2us( 5.2us)(0.00%) 352 99.7% 0.28% 0% scsi_old_done+0x740
0.00% 15.7% 1.1us( 31us) 12us( 134us)(0.00%) 1143120 84.3% 15.7% 0% scsi_queue_next_request+0x48
0.00% 1.2% 0.3us( 32us) 15us( 433us)(0.00%) 1143120 98.8% 1.2% 0% scsi_request_fn+0x490

0.00% 13.2% 9.4us( 69ms) 83us(2187ms)(0.00%) 8323717 86.8% 13.2% 0% kernel_flag
0.00% 6.0% 0.9us( 9.4us) 134us(7015us)(0.00%) 12196 94.0% 6.0% 0% chrdev_open+0x70
0.00% 21.5% 0.7us( 8.5us) 111us(2877us)(0.00%) 8293 78.5% 21.5% 0% de_put+0x3c
0.00% 27.2% 464us( 69ms) 146us( 13ms)(0.00%) 62702 72.8% 27.2% 0% do_exit+0x1a4
0.00% 9.7% 17us(6217us) 40us(4783us)(0.00%) 74053 90.3% 9.7% 0% ext2_delete_inode+0x38
0.00% 13.5% 0.2us( 767us) 25us( 163ms)(0.00%) 706419 86.5% 13.5% 0% ext2_discard_prealloc+0x38
0.00% 14.6% 5.3us( 13ms) 60us(1814ms)(0.00%) 1774326 85.4% 14.6% 0% ext2_get_block+0x84
0.00% 18.6% 44us(7402us) 207us( 896ms)(0.00%) 516517 81.4% 18.6% 0% ext2_write_inode+0x40
0.00% 0% 99us( 206us) 0us 3 100% 0% 0% fsync_dev+0x40
0.00% 26.5% 4.0us( 80us) 161us( 13ms)(0.00%) 10618 73.5% 26.5% 0% get_chrfops+0xf8
0.00% 14.0% 8.5us(1355us) 68us( 68ms)(0.00%) 100173 86.0% 14.0% 0% lookup_hash+0xc8
0.00% 11.5% 3.1us(1260us) 36us( 69ms)(0.00%) 502464 88.5% 11.5% 0% notify_change+0xa0
0.00% 21.4% 30us( 65us) 135us(4200us)(0.00%) 500 78.6% 21.4% 0% osf_shmat+0x48
0.00% 25.0% 31us( 789us) 144us(7949us)(0.00%) 8505 75.0% 25.0% 0% real_lookup+0xd0
0.00% 21.5% 13us(7861us) 175us( 151ms)(0.00%) 643746 78.5% 21.5% 0% schedule+0x594
0.00% 21.1% 4911us(7887us) 77us( 300us)(0.00%) 57 78.9% 21.1% 0% sync_old_buffers+0x38
0.00% 17.5% 1.0us( 168us) 87us(8398us)(0.00%) 25198 82.5% 17.5% 0% sys_ioctl+0x70
0.00% 10.3% 0.1us( 498us) 54us(2187ms)(0.00%) 3504008 89.7% 10.3% 0% sys_lseek+0x88
0.00% 0% 3.1us( 6.7us) 0us 39 100% 0% 0% sys_sysctl+0x7c
0.00% 0% 8.6us( 34us) 0us 63 100% 0% 0% tty_write+0x278
0.00% 8.3% 17us(6743us) 22us(8082us)(0.00%) 73118 91.7% 8.3% 0% vfs_create+0xdc
0.00% 9.7% 5.8us(1171us) 65us( 84ms)(0.00%) 47441 90.3% 9.7% 0% vfs_link+0xf8
0.00% 0% 67us( 194us) 0us 936 100% 0% 0% vfs_mkdir+0xd0
0.00% 12.1% 11us(1034us) 43us( 30ms)(0.00%) 130847 87.9% 12.1% 0% vfs_readdir+0xec
0.00% 0% 11us( 31us) 0us 936 100% 0% 0% vfs_rmdir+0x21c
0.00% 12.7% 6.4us( 664us) 40us( 82ms)(0.00%) 120559 87.3% 12.7% 0% vfs_unlink+0x188

0.00% 5.1% 0.8us( 13ms) 9.2us( 318ms)(0.00%) 18109739 94.9% 5.1% 0% lru_list_lock
0.00% 3.5% 2.9us( 71us) 14us( 222us)(0.00%) 7539 96.5% 3.5% 0% __bforget+0x28
0.00% 0.24% 0.1us( 299us) 10us( 451us)(0.00%) 2428859 99.8% 0.24% 0% buffer_insert_inode_data_queue+0x30
0.00% 2.2% 0.1us( 605us) 7.7us(1500us)(0.00%) 1682552 97.8% 2.2% 0% buffer_insert_inode_queue+0x30
0.00% 11.6% 0.1us( 318us) 7.5us(7457us)(0.00%) 783000 88.4% 11.6% 0% fsync_inode_buffers+0x40
0.00% 9.7% 0.3us( 9.4us) 7.4us(4675us)(0.00%) 119500 90.3% 9.7% 0% fsync_inode_buffers+0x13c
0.00% 5.1% 0.3us( 9.2us) 9.3us( 931us)(0.00%) 119500 94.9% 5.1% 0% fsync_inode_buffers+0x200
0.00% 0.73% 0.4us( 508us) 8.3us(5688us)(0.00%) 783000 99.3% 0.73% 0% fsync_inode_data_buffers+0x40
0.00% 7.9% 0.1us( 817us) 12us( 318ms)(0.00%) 848000 92.1% 7.9% 0% fsync_inode_data_buffers+0x13c
0.00% 4.7% 0.3us( 768us) 18us( 13ms)(0.00%) 846833 95.3% 4.7% 0% fsync_inode_data_buffers+0x200
0.00% 7.4% 1.4us(1448us) 8.4us( 13ms)(0.00%) 2312782 92.6% 7.4% 0% getblk+0x4c
0.00% 5.0% 0.2us( 59us) 13us(4357us)(0.00%) 91352 95.0% 5.0% 0% inode_has_buffers+0x30
0.00% 6.0% 0.2us( 87us) 8.9us(5212us)(0.00%) 83057 94.0% 6.0% 0% invalidate_inode_buffers+0x30
0.00% 3.5% 5332us( 13ms) 10.0us( 14us)(0.00%) 57 96.5% 3.5% 0% kupdate+0x11c
0.00% 0.10% 0.1us( 33us) 9.4us( 104us)(0.00%) 783000 99.9% 0.10% 0% osync_inode_buffers+0x40
0.00% 0.16% 0.2us( 191us) 9.3us( 645us)(0.00%) 783000 99.8% 0.16% 0% osync_inode_data_buffers+0x40
0.00% 8.1% 1.1us(1315us) 8.8us( 105ms)(0.00%) 5545785 91.9% 8.1% 0% refile_buffer+0x2c
0.00% 8.5% 27us( 91us) 17us( 226us)(0.00%) 316 91.5% 8.5% 0% sync_old_buffers+0xb8
0.00% 2.7% 3.7us( 855us) 9.0us(1000us)(0.00%) 891124 97.3% 2.7% 0% try_to_free_buffers+0x64
0.00% 0% 2.5us( 26us) 0us 24 100% 0% 0% wait_for_locked_buffers+0x3c
0.00% 0% 18us( 27us) 0us 459 100% 0% 0% write_unlocked_buffers+0x2c

0.00% 7.3% 0.4us(1172us) 5.7us( 125ms)(0.00%) 21414541 92.7% 7.3% 0% pagecache_lock
0.00% 9.7% 0.9us(1172us) 5.7us(1345us)(0.00%) 2995090 90.3% 9.7% 0% __find_get_page+0x38
0.00% 7.1% 0.1us( 546us) 5.8us( 125ms)(0.00%) 8965440 92.9% 7.1% 0% __find_lock_page+0x38
0.00% 7.4% 0.1us( 2.3us) 5.4us( 29us)(0.00%) 500 92.6% 7.4% 0% __set_page_dirty+0x34
0.00% 7.2% 7.4us( 15us) 3.5us( 14us)(0.00%) 500 92.8% 7.2% 0% add_to_page_cache+0x48
0.00% 6.2% 3.6us( 923us) 5.9us( 466us)(0.00%) 891572 93.8% 6.2% 0% add_to_page_cache_unique+0x44
0.00% 8.1% 0.2us(1149us) 5.7us( 41ms)(0.00%) 5186669 91.9% 8.1% 0% do_generic_file_read+0x258
0.00% 0% 2.7us( 12us) 0us 20 100% 0% 0% do_generic_file_read+0x5b8
0.00% 4.5% 0.1us( 525us) 5.0us( 989us)(0.00%) 541375 95.5% 4.5% 0% filemap_fdatasync+0x48
0.00% 4.5% 0.1us( 14us) 4.9us( 911us)(0.00%) 541375 95.5% 4.5% 0% filemap_fdatawait+0x34
0.00% 1.7% 0.1us( 2.4us) 5.1us( 7.4us)(0.00%) 237 98.3% 1.7% 0% page_cache_read+0x7c
0.00% 6.7% 0.2us( 427us) 6.1us( 12ms)(0.00%) 891624 93.3% 6.7% 0% remove_inode_page+0x54
0.00% 6.3% 0.2us( 382us) 5.0us( 839us)(0.00%) 508515 93.7% 6.3% 0% truncate_inode_pages+0x54
0.00% 3.4% 0.2us( 200us) 6.3us( 751us)(0.00%) 891624 96.6% 3.4% 0% truncate_list_pages+0x2ac

0.00% 71.0% 62us( 529us) 310us( 62ms)(0.00%) 3906233 29.0% 71.0% 0% runqueue_lock
0.00% 64.8% 2.6us( 14us) 172us( 43ms)(0.00%) 1608940 35.2% 64.8% 0% __wake_up+0xc8
0.00% 20.7% 0.0us( 3.2us) 226us( 57ms)(0.00%) 500501 79.3% 20.7% 0% deliver_signal+0x58
0.00% 42.4% 2.4us( 6.6us) 224us( 735us)(0.00%) 118 57.6% 42.4% 0% process_timeout+0x3c
0.00% 83.2% 4.0us( 12us) 660us( 31ms)(0.00%) 1025 16.8% 83.2% 0% schedule_tail+0xa4
0.00% 90.9% 139us( 529us) 397us( 62ms)(0.00%) 1706685 9.1% 90.9% 0% schedule+0xfc
0.00% 70.1% 4.5us( 13us) 1028us( 55ms)(0.00%) 24689 29.9% 70.1% 0% schedule+0x534
0.00% 29.0% 29us( 205us) 154us( 697us)(0.00%) 310 71.0% 29.0% 0% schedule+0x654
0.00% 86.0% 3.8us( 11us) 394us( 55ms)(0.00%) 63965 14.0% 86.0% 0% wake_up_process+0x44

0.00% 2.5% 0.1us( 37us) 2.6us( 24us)(0.00%) 2541315 97.5% 2.5% 0% timerlist_lock
0.00% 1.7% 0.2us( 6.5us) 2.1us( 24us)(0.00%) 1143367 98.3% 1.7% 0% add_timer+0x3c
0.00% 3.6% 0.1us( 4.5us) 2.7us( 13us)(0.00%) 1146093 96.4% 3.6% 0% del_timer+0x38
0.00% 1.9% 0.2us( 3.2us) 3.1us( 11us)(0.00%) 62820 98.1% 1.9% 0% del_timer_sync+0x48
0.00% 2.4% 0.3us( 5.2us) 3.9us( 16us)(0.00%) 84360 97.6% 2.4% 0% mod_timer+0x3c
0.00% 0.07% 0.2us( 37us) 3.3us( 8.7us)(0.00%) 104039 100% 0.07% 0% timer_bh+0x148
0.00% 0.47% 3.3us( 24us) 6.6us( 8.9us)(0.00%) 636 99.5% 0.47% 0% timer_bh+0x39c

0.00% 1.4% 0.2us(1115us) 11us( 59ms)(0.00%) 6961760 98.6% 1.4% 0% atomic_dec_and_lock+0x2c
0.00% 2.0% 0.6us( 7.1us) 143us( 915us)(0.00%) 1578341 98.0% 2.0% 0% remove_wait_queue+0x3c
0.00% 1.0% 0.5us( 12us) 2.3us( 29us)(0.00%) 3515524 99.0% 1.0% 0% rmqueue+0x64

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
RWLOCK READS HOLD MAX RDR BUSY PERIOD WAIT
UTIL CON MEAN RDRS MEAN( MAX ) MEAN( MAX )( %CPU) TOTAL NOWAIT SPIN NAME

0.34% 8.7us(1417us)(0.00%) 21605003 99.7% 0.34% *TOTAL*

0.00% 4.6% 1.2us 2 1.2us( 15us) 4.9us( 39us)(0.00%) 12196 95.4% 4.6% chrdevs_lock
4.6% 4.9us( 39us)(0.00%) 12196 95.4% 4.6% get_chrfops+0x54

0.00% 3.2% 0.9us 3 114us(4373ms) 6.5us( 828us)(0.00%) 1774074 96.8% 3.2% hash_table_lock
3.2% 6.5us( 828us)(0.00%) 1774074 96.8% 3.2% get_hash_table+0x3c

0.00% 1.6% Data Sync Error 5003us(4374ms) 22us(1417us)(0.00%) 748135 98.4% 1.6% tasklist_lock
0% 0us 67 100% 0% count_active_tasks+0x24
0.38% 3.7us( 10us)(0.00%) 62702 99.6% 0.38% exit_notify+0x34
0% 0us 2 100% 0% get_pid+0xac
0% 0us 1 100% 0% kill_pg_info+0x50
1.8% 16us( 877us)(0.00%) 500000 98.2% 1.8% kill_something_info+0x14c
0% 0us 310 100% 0% schedule+0x5d8
0% 0us 1 100% 0% sys_setsid+0x24
1.4% 44us(1417us)(0.00%) 185052 98.6% 1.4% sys_wait4+0x94

0.00% 2.7% 0.5us 2 140us(3773ms) 3.0us( 40us)(0.00%) 180933 97.3% 2.7% xtime_lock
2.7% 3.0us( 40us)(0.00%) 180933 97.3% 2.7% do_gettimeofday+0x48

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
RWLOCK WRITES HOLD WAIT (ALL) WAIT (WW)
UTIL CON MEAN( MAX ) MEAN( MAX )( %CPU) MEAN( MAX ) TOTAL NOWAIT SPIN( WW ) NAME

0.63% 1.5us(1144us) 143us( 68ms)(0.00%) 14us(9399us) 6361658 99.4% 0.52%(0.11%) *TOTAL*

0.00% 2.5% 0.4us( 6.7us) 9.4us( 40us)(0.00%) 4.7us( 40us) 3911 97.5% 0%( 2.5%) dn_lock
0.00% 2.5% 0.4us( 6.7us) 9.4us( 40us)(0.00%) 4.7us( 40us) 3911 97.5% 0%( 2.5%) fcntl_dirnotify+0xb8

0.00% 9.2% 25us(1144us) 326us( 68ms)(0.00%) 55us(9399us) 188108 90.8% 8.3%(0.90%) tasklist_lock
0.00% 11.5% 1.9us( 10us) 353us( 50ms)(0.00%) 66us( 700us) 62704 88.5% 10.4%( 1.2%) do_fork+0x5fc
0.00% 4.0% 71us(1144us) 90us( 68ms)(0.00%) 4.7us( 42us) 62702 96.0% 2.9%( 1.2%) exit_notify+0x21c
0.00% 12.0% 1.9us( 9.8us) 381us( 55ms)(0.00%) 190us(9399us) 62702 88.0% 11.6%(0.35%) release_task+0xf0
_________________________________________________________________________________________________________________________
Number of read locks found=13
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