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Ingo Molnar 82f67cd9fc [PATCH] Add debugging feature /proc/timer_stat 
Add /proc/timer_stats support: debugging feature to profile timer expiration.
Both the starting site, process/PID and the expiration function is captured.
This allows the quick identification of timer event sources in a system.

Sample output:

# echo 1 > /proc/timer_stats
# cat /proc/timer_stats
Timer Stats Version: v0.1
Sample period: 4.010 s
  24,     0 swapper          hrtimer_stop_sched_tick (hrtimer_sched_tick)
  11,     0 swapper          sk_reset_timer (tcp_delack_timer)
   6,     0 swapper          hrtimer_stop_sched_tick (hrtimer_sched_tick)
   2,     1 swapper          queue_delayed_work_on (delayed_work_timer_fn)
  17,     0 swapper          hrtimer_restart_sched_tick (hrtimer_sched_tick)
   2,     1 swapper          queue_delayed_work_on (delayed_work_timer_fn)
   4,  2050 pcscd            do_nanosleep (hrtimer_wakeup)
   5,  4179 sshd             sk_reset_timer (tcp_write_timer)
   4,  2248 yum-updatesd     schedule_timeout (process_timeout)
  18,     0 swapper          hrtimer_restart_sched_tick (hrtimer_sched_tick)
   3,     0 swapper          sk_reset_timer (tcp_delack_timer)
   1,     1 swapper          neigh_table_init_no_netlink (neigh_periodic_timer)
   2,     1 swapper          e1000_up (e1000_watchdog)
   1,     1 init             schedule_timeout (process_timeout)
100 total events, 25.24 events/sec

[ cleanups and hrtimers support from Thomas Gleixner <tglx@linutronix.de> ]
[bunk@stusta.de: nr_entries can become static]
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: john stultz <johnstul@us.ibm.com>
Cc: Roman Zippel <zippel@linux-m68k.org>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 		2007-02-16 08:13:59 -08:00
..
reed_solomon
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zlib_deflate
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zlib_inflate
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.gitignore
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Kconfig [PATCH] sort the devres mess out 2007-02-11 11:18:07 -08:00
Kconfig.debug [PATCH] Add debugging feature /proc/timer_stat 2007-02-16 08:13:59 -08:00
Makefile [PATCH] sort the devres mess out 2007-02-11 11:18:07 -08:00
audit.c
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bitmap.c [PATCH] Numerous fixes to kernel-doc info in source files. 2007-02-11 10:51:32 -08:00
bitrev.c [PATCH] add MODULE_* attributes to bit reversal library 2006-12-10 10:07:52 -08:00
bug.c [PATCH] Generic BUG implementation 2006-12-08 08:28:39 -08:00
bust_spinlocks.c [PATCH] Extract and use wake_up_klogd() 2007-02-11 10:51:34 -08:00
cmdline.c [PATCH] Numerous fixes to kernel-doc info in source files. 2007-02-11 10:51:32 -08:00
cpumask.c
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crc-ccitt.c
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crc16.c
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crc32.c [PATCH] crc32: replace bitreverse by bitrev32 2006-12-08 08:28:39 -08:00
crc32defs.h
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ctype.c
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debug_locks.c
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dec_and_lock.c
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devres.c [PATCH] pci_iomap_regions() error handling fix 2007-02-16 08:13:55 -08:00
div64.c
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dump_stack.c
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extable.c
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fault-inject.c Remove stack unwinder for now 2006-12-15 08:47:51 -08:00
find_next_bit.c
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gen_crc32table.c
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genalloc.c
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halfmd4.c
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hweight.c
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idr.c [PATCH] Numerous fixes to kernel-doc info in source files. 2007-02-11 10:51:32 -08:00
inflate.c
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int_sqrt.c
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iomap.c [PATCH] sort the devres mess out 2007-02-11 11:18:07 -08:00
iomap_copy.c
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ioremap.c [PATCH] uml problems with linux/io.h 2006-12-13 09:05:52 -08:00
irq_regs.c
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kernel_lock.c
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klist.c
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kobject.c [PATCH] Numerous fixes to kernel-doc info in source files. 2007-02-11 10:51:32 -08:00
kobject_uevent.c kobject: kobject_uevent() returns manageable value 2006-12-20 10:56:44 -08:00
kref.c kref refcnt and false positives 2006-12-20 10:56:43 -08:00
libcrc32c.c
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list_debug.c [PATCH] More list debugging context 2006-12-07 08:39:35 -08:00
locking-selftest-hardirq.h
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locking-selftest-mutex.h
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locking-selftest-rlock-hardirq.h
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locking-selftest-rlock-softirq.h
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locking-selftest-rlock.h
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locking-selftest-rsem.h
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locking-selftest-softirq.h
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locking-selftest-spin-hardirq.h
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locking-selftest-spin-softirq.h
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locking-selftest-spin.h
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locking-selftest-wlock-hardirq.h
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locking-selftest-wlock-softirq.h
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locking-selftest-wlock.h
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locking-selftest-wsem.h
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locking-selftest.c [PATCH] lockdep: show more details about self-test failures 2006-12-07 08:39:43 -08:00
parser.c
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percpu_counter.c
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plist.c
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prio_tree.c
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radix-tree.c [PATCH] hotplug CPU: clean up hotcpu_notifier() use 2006-12-07 08:39:39 -08:00
random32.c
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rbtree.c
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reciprocal_div.c [PATCH] SLAB: use a multiply instead of a divide in obj_to_index() 2006-12-13 09:05:49 -08:00
rwsem-spinlock.c
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rwsem.c
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semaphore-sleepers.c
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sha1.c [PATCH] Numerous fixes to kernel-doc info in source files. 2007-02-11 10:51:32 -08:00
smp_processor_id.c
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sort.c [PATCH] Numerous fixes to kernel-doc info in source files. 2007-02-11 10:51:32 -08:00
spinlock_debug.c
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string.c [PATCH] Numerous fixes to kernel-doc info in source files. 2007-02-11 10:51:32 -08:00
swiotlb.c [PATCH] swiotlb uninlinings 2007-02-12 09:48:29 -08:00
textsearch.c [PATCH] Numerous fixes to kernel-doc info in source files. 2007-02-11 10:51:32 -08:00
ts_bm.c
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ts_fsm.c
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ts_kmp.c
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vsprintf.c [PATCH] scnprintf(): fix a comment 2007-02-12 09:48:28 -08:00