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

..

irq

[PATCH] Add a function to handle interrupt affinity setting

2007-02-16 08:13:56 -08:00

power

[PATCH] swsusp: Change pm_ops handling by userland interface

2007-02-11 10:51:20 -08:00

time

[PATCH] Add debugging feature /proc/timer_stat

2007-02-16 08:13:59 -08:00

.gitignore

gitignore: ignore more generated files

2006-01-03 11:35:26 +01:00

acct.c

[PATCH] kernel: change uses of f_{dentry, vfsmnt} to use f_path

2006-12-08 08:28:42 -08:00

audit.c

[PATCH] Add include/linux/freezer.h and move definitions from sched.h

2006-12-07 08:39:27 -08:00

audit.h

[PATCH] audit: AUDIT_PERM support

2006-09-11 13:32:30 -04:00

auditfilter.c

[PATCH] audit: fix audit_filter_user_rules() initialization bug

2007-02-11 10:51:34 -08:00

auditsc.c

[PATCH] struct path: convert kernel

2006-12-08 08:28:46 -08:00

capability.c

[PATCH] pid: replace do/while_each_task_pid with do/while_each_pid_task

2007-02-12 09:48:32 -08:00

compat.c

[PATCH] Common compat_sys_sysinfo

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

configs.c

[PATCH] struct seq_operations and struct file_operations constification

2006-12-07 08:39:46 -08:00

cpu.c

[PATCH] swsusp: Change code ordering in disk.c

2007-02-11 10:51:19 -08:00

cpuset.c

[PATCH] mark struct inode_operations const 2

2007-02-12 09:48:46 -08:00

delayacct.c

[PATCH] slab: remove kmem_cache_t

2006-12-07 08:39:25 -08:00

dma.c

[PATCH] struct seq_operations and struct file_operations constification

2006-12-07 08:39:46 -08:00

exec_domain.c

Remove obsolete #include <linux/config.h>

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

exit.c

[PATCH] pid: replace is_orphaned_pgrp with is_current_pgrp_orphaned

2007-02-12 09:48:32 -08:00

extable.c

[PATCH] symbol_put_addr() locks kernel

2006-05-15 11:20:55 -07:00

fork.c

[PATCH] hrtimers: namespace and enum cleanup

2007-02-16 08:13:58 -08:00

futex_compat.c

[PATCH] __user annotations: futex

2006-10-10 15:37:22 -07:00

futex.c

[PATCH] hrtimers: namespace and enum cleanup

2007-02-16 08:13:58 -08:00

hrtimer.c

[PATCH] Add debugging feature /proc/timer_stat

2007-02-16 08:13:59 -08:00

itimer.c

[PATCH] hrtimers: prevent possible itimer DoS

2007-02-16 08:13:59 -08:00

kallsyms.c

[PATCH] move kallsyms data to .rodata

2006-12-08 08:28:37 -08:00

Kconfig.hz

[PATCH] HZ: 300Hz support

2006-12-07 08:39:36 -08:00

Kconfig.preempt

…

kexec.c

Merge branch 'release' of master.kernel.org:/pub/scm/linux/kernel/git/aegl/linux-2.6

2006-12-07 15:39:22 -08:00

kfifo.c

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

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

kmod.c

[PATCH] x86-64: Allow to run a program when a machine check event is detected

2007-02-13 13:26:23 +01:00

kprobes.c

[PATCH] kprobes: replace magic numbers with enum

2007-01-30 16:01:35 -08:00

ksysfs.c

Remove obsolete #include <linux/config.h>

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

kthread.c

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

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

latency.c

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

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

lockdep_internals.h

[PATCH] lockdep: more chains

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

lockdep_proc.c

[PATCH] remove many unneeded #includes of sched.h

2007-02-14 08:09:54 -08:00

lockdep.c

[PATCH] lockdep: add graph depth information to /proc/lockdep

2007-02-11 10:51:26 -08:00

Makefile

[PATCH] sysctl: move utsname sysctls to their own file

2007-02-14 08:09:58 -08:00

module.c

/sys/modules/*/holders

2007-02-07 10:37:12 -08:00

mutex-debug.c

[PATCH] remove many unneeded #includes of sched.h

2007-02-14 08:09:54 -08:00

mutex-debug.h

[PATCH] lockdep: better lock debugging

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

mutex.c

[PATCH] lockdep: avoid lockdep warning in md

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

mutex.h

[PATCH] lockdep: prove mutex locking correctness

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

nsproxy.c

Revert "[PATCH] namespaces: fix exit race by splitting exit"

2007-01-30 13:35:18 -08:00

panic.c

[PATCH] Add TAINT_USER and ability to set taint flags from userspace

2007-02-11 10:51:29 -08:00

params.c

/sys/modules/*/holders

2007-02-07 10:37:12 -08:00

pid.c

[PATCH] namespaces: fix task exit disaster

2007-01-30 13:40:36 -08:00

posix-cpu-timers.c

[PATCH] posix-cpu-timers: prevent signal delivery starvation

2006-10-17 08:18:43 -07:00

posix-timers.c

[PATCH] hrtimers: add high resolution timer support

2007-02-16 08:13:59 -08:00

printk.c

[PATCH] order of lockdep off/on in vprintk() should be changed

2007-02-11 11:18:06 -08:00

profile.c

[PATCH] proc: remove useless (and buggy) ->nlink settings

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

ptrace.c

[PATCH] pidspace: is_init()

2006-09-29 09:18:12 -07:00

rcupdate.c

[PATCH] rcu: add a prefetch() in rcu_do_batch()

2006-12-07 08:39:40 -08:00

rcutorture.c

[PATCH] rcu: rcutorture suspend fix

2006-12-30 10:55:55 -08:00

relay.c

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

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

resource.c

[PATCH] remove many unneeded #includes of sched.h

2007-02-14 08:09:54 -08:00

rtmutex_common.h

[PATCH] pi-futex: futex_lock_pi/futex_unlock_pi support

2006-06-27 17:32:47 -07:00

rtmutex-debug.c

Remove all inclusions of <linux/config.h>

2006-10-04 03:38:54 -04:00

rtmutex-debug.h

[PATCH] lockdep: better lock debugging

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

rtmutex-tester.c

[PATCH] Add include/linux/freezer.h and move definitions from sched.h

2006-12-07 08:39:27 -08:00

rtmutex.c

[PATCH] hrtimers: namespace and enum cleanup

2007-02-16 08:13:58 -08:00

rtmutex.h

[PATCH] lockdep: better lock debugging

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

rwsem.c

[PATCH] lockdep: prove rwsem locking correctness

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

sched.c

[PATCH] i386: paravirt CPU hypercall batching mode

2007-02-13 13:26:21 +01:00

seccomp.c

…

signal.c

[PATCH] hrtimers: prevent possible itimer DoS

2007-02-16 08:13:59 -08:00

softirq.c

[PATCH] tick-management: dyntick / highres functionality

2007-02-16 08:13:59 -08:00

softlockup.c

[PATCH] check return value of cpu_callback

2006-09-29 09:18:14 -07:00

spinlock.c

[PATCH] lockdep: spin_lock_irqsave_nested()

2006-11-25 13:28:34 -08:00

srcu.c

[PATCH] SRCU: report out-of-memory errors

2006-10-04 07:55:30 -07:00

stacktrace.c

[PATCH] lockdep: stacktrace subsystem, core

2006-07-03 15:27:02 -07:00

stop_machine.c

[PATCH] stop_machine.c copyright

2006-09-29 09:18:24 -07:00

sys_ni.c

[PATCH] Create compat_sys_migrate_pages

2006-11-03 12:27:59 -08:00

sys.c

[PATCH] pid: replace do/while_each_task_pid with do/while_each_pid_task

2007-02-12 09:48:32 -08:00

sysctl.c

[PATCH] sysctl: add a parent entry to ctl_table and set the parent entry

2007-02-14 08:10:00 -08:00

taskstats.c

[PATCH] taskstats: cleanup reply assembling

2006-12-07 08:39:34 -08:00

time.c

[PATCH] Fix multiple conversion bugs in msecs_to_jiffies

2007-02-16 08:13:56 -08:00

timer.c

[PATCH] Add debugging feature /proc/timer_stat

2007-02-16 08:13:59 -08:00

tsacct.c

[PATCH] io-accounting: via taskstats

2006-12-10 09:55:41 -08:00

uid16.c

[PATCH] Add more prevent_tail_call()

2006-04-19 16:27:18 -07:00

user.c

[PATCH] slab: remove kmem_cache_t

2006-12-07 08:39:25 -08:00

utsname_sysctl.c

[PATCH] sysctl: remove insert_at_head from register_sysctl

2007-02-14 08:09:59 -08:00

utsname.c

[PATCH] namespaces: utsname: implement CLONE_NEWUTS flag

2006-10-02 07:57:22 -07:00

wait.c

[PATCH] uninline init_waitqueue_head()

2006-07-10 13:24:25 -07:00

workqueue.c

[PATCH] Add debugging feature /proc/timer_stat

2007-02-16 08:13:59 -08:00