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

fix file specification in comments

2006-10-03 23:01:26 +02:00

zlib_deflate

[PATCH] zlib_inflate: Upgrade library code to a recent version

2006-06-22 15:05:58 -07:00

zlib_inflate

[PATCH] Fix ppc32 zImage inflate

2006-07-31 13:28:37 -07:00

.gitignore

Add some basic .gitignore files

2005-10-18 08:26:15 -07:00

audit.c

[PATCH] fix missing ifdefs in syscall classes hookup for generic targets

2006-09-22 17:48:56 -07:00

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

[PATCH] highest_possible_node_id() linkage fix

2006-10-20 10:26:43 -07:00

crc16.c

[PATCH] kernel-doc for lib/crc*.c

2006-06-25 10:01:20 -07:00

crc32.c

[PATCH] crc32: replace bitreverse by bitrev32

2006-12-08 08:28:39 -08:00

crc32defs.h

Linux-2.6.12-rc2

2005-04-16 15:20:36 -07:00

crc-ccitt.c

[PATCH] kernel-doc for lib/crc*.c

2006-06-25 10:01:20 -07:00

ctype.c

Linux-2.6.12-rc2

2005-04-16 15:20:36 -07:00

debug_locks.c

[PATCH] lockdep: better lock debugging

2006-07-03 15:27:01 -07:00

dec_and_lock.c

[PATCH] atomic: dec_and_lock use atomic primitives

2006-01-08 20:13:48 -08:00

devres.c

[PATCH] pci_iomap_regions() error handling fix

2007-02-16 08:13:55 -08:00

div64.c

Linux-2.6.12-rc2

2005-04-16 15:20:36 -07:00

dump_stack.c

Linux-2.6.12-rc2

2005-04-16 15:20:36 -07:00

extable.c

Remove obsolete #include <linux/config.h>

2006-06-30 19:25:36 +02:00

fault-inject.c

Remove stack unwinder for now

2006-12-15 08:47:51 -08:00

find_next_bit.c

[PATCH] bitops: generic ext2_{set,clear,test,find_first_zero,find_next_zero}_bit()

2006-03-26 08:57:11 -08:00

gen_crc32table.c

Linux-2.6.12-rc2

2005-04-16 15:20:36 -07:00

genalloc.c

[PATCH] make genpool allocator adhere to kernel-doc standards

2006-10-02 07:57:12 -07:00

halfmd4.c

Linux-2.6.12-rc2

2005-04-16 15:20:36 -07:00

hweight.c

[PATCH] optimize hweight64 for x86_64

2006-09-26 10:52:38 +02:00

idr.c

[PATCH] Numerous fixes to kernel-doc info in source files.

2007-02-11 10:51:32 -08:00

inflate.c

[PATCH] Update in-kernel zlib routines

2005-08-05 16:23:21 -07:00

int_sqrt.c

[PATCH] lib: Fix bug in int_sqrt() for 64 bit longs

2006-02-03 08:32:08 -08:00

iomap_copy.c

[PATCH] add __iowrite64_copy

2006-06-20 20:24:58 -07:00

iomap.c

[PATCH] sort the devres mess out

2007-02-11 11:18:07 -08:00

ioremap.c

[PATCH] uml problems with linux/io.h

2006-12-13 09:05:52 -08:00

irq_regs.c

[PATCH] irq_reqs: export __irq_regs

2006-10-06 08:53:40 -07:00

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

kernel_lock.c

[PATCH] lockdep: prove spinlock rwlock locking correctness

2006-07-03 15:27:04 -07:00

klist.c

Driver core: Don't call put methods while holding a spinlock

2006-09-25 21:08:40 -07:00

kobject_uevent.c

kobject: kobject_uevent() returns manageable value

2006-12-20 10:56:44 -08:00

kobject.c

[PATCH] Numerous fixes to kernel-doc info in source files.

2007-02-11 10:51:32 -08:00

kref.c

kref refcnt and false positives

2006-12-20 10:56:43 -08:00

libcrc32c.c

[PATCH] constify libcrc32c table

2006-06-25 10:01:09 -07:00

list_debug.c

[PATCH] More list debugging context

2006-12-07 08:39:35 -08:00

locking-selftest-hardirq.h

[PATCH] lockdep: locking API self tests

2006-07-03 15:27:03 -07:00

locking-selftest-mutex.h

[PATCH] lockdep: locking API self tests

2006-07-03 15:27:03 -07:00

locking-selftest-rlock-hardirq.h

[PATCH] lockdep: locking API self tests

2006-07-03 15:27:03 -07:00

locking-selftest-rlock-softirq.h

[PATCH] lockdep: locking API self tests

2006-07-03 15:27:03 -07:00

locking-selftest-rlock.h

[PATCH] lockdep: locking API self tests

2006-07-03 15:27:03 -07:00

locking-selftest-rsem.h

[PATCH] lockdep: locking API self tests

2006-07-03 15:27:03 -07:00

locking-selftest-softirq.h

[PATCH] lockdep: locking API self tests

2006-07-03 15:27:03 -07:00

locking-selftest-spin-hardirq.h

[PATCH] lockdep: locking API self tests

2006-07-03 15:27:03 -07:00

locking-selftest-spin-softirq.h

[PATCH] lockdep: locking API self tests

2006-07-03 15:27:03 -07:00

locking-selftest-spin.h

[PATCH] lockdep: locking API self tests

2006-07-03 15:27:03 -07:00

locking-selftest-wlock-hardirq.h

[PATCH] lockdep: locking API self tests

2006-07-03 15:27:03 -07:00

locking-selftest-wlock-softirq.h

[PATCH] lockdep: locking API self tests

2006-07-03 15:27:03 -07:00

locking-selftest-wlock.h

[PATCH] lockdep: locking API self tests

2006-07-03 15:27:03 -07:00

locking-selftest-wsem.h

[PATCH] lockdep: locking API self tests

2006-07-03 15:27:03 -07:00

locking-selftest.c

[PATCH] lockdep: show more details about self-test failures

2006-12-07 08:39:43 -08:00

Makefile

[PATCH] sort the devres mess out

2007-02-11 11:18:07 -08:00

parser.c

Linux-2.6.12-rc2

2005-04-16 15:20:36 -07:00

percpu_counter.c

[PATCH] percpu counter data type changes to suppport more than 2**31 ext3 free blocks counter

2006-06-23 07:43:06 -07:00

plist.c

[PATCH] pi-futex: add plist implementation

2006-06-27 17:32:46 -07:00

prio_tree.c

Linux-2.6.12-rc2

2005-04-16 15:20:36 -07:00

radix-tree.c

[PATCH] hotplug CPU: clean up hotcpu_notifier() use

2006-12-07 08:39:39 -08:00

random32.c

[PATCH] severing module.h->sched.h

2006-12-04 02:00:22 -05:00

rbtree.c

[PATCH] rbtree: fixed reversed RB_EMPTY_NODE and rb_next/prev

2006-09-30 20:26:56 +02:00

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

Lockdep: add lockdep_set_class_and_subclass() and lockdep_set_subclass()

2006-10-11 01:45:14 -04:00

rwsem.c

Lockdep: add lockdep_set_class_and_subclass() and lockdep_set_subclass()

2006-10-11 01:45:14 -04:00

semaphore-sleepers.c

Remove obsolete #include <linux/config.h>

2006-06-30 19:25:36 +02:00

sha1.c

[PATCH] Numerous fixes to kernel-doc info in source files.

2007-02-11 10:51:32 -08:00

smp_processor_id.c

[PATCH] fix missing includes

2005-10-30 17:37:32 -08:00

sort.c

[PATCH] Numerous fixes to kernel-doc info in source files.

2007-02-11 10:51:32 -08:00

spinlock_debug.c

[PATCH] x86: all cpu backtrace

2006-12-07 02:14:01 +01:00

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

[TEXTSEARCH]: Fix Boyer Moore initialization bug

2006-08-22 14:33:58 -07:00

ts_fsm.c

[PATCH] lib/ts_fsm.c: constify structs

2006-09-29 09:18:23 -07:00

ts_kmp.c

Remove obsolete #include <linux/config.h>

2006-06-30 19:25:36 +02:00

vsprintf.c

[PATCH] scnprintf(): fix a comment

2007-02-12 09:48:28 -08:00