Ingo Molnar cf019da099 [PATCH] timer stats: speedups ...

Make timer-stats have almost zero overhead when enabled in the config but
not used.  (this way distros can enable it more easily)

Also update the documentation about overhead of timer_stats - it was
written for the first version which had a global lock and a linear list
walk based lookup ;-)

Andrew says:
And this.  Not a bugfix, but trivial and obvious and apparently some
distros don't want to enable timer_stats because of the performance
issue, but powertop uses timer_stats.

Ingo replies:
seconded. I have tested this with and without CONFIG_TIMER_STATS, with
and without timer_stats collection activated.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

2007-06-11 11:36:48 -07:00

..

irq

[PATCH] irq-devres: fix failure path of devm_request_irq()

2007-04-07 10:05:21 -07:00

power

[PATCH] swsusp: fix memory shrinker

2007-04-04 21:12:47 -07:00

time

[PATCH] timer stats: speedups

2007-06-11 11:36:48 -07:00

.gitignore

…

acct.c

…

audit.c

[PATCH] audit config lockdown

2007-02-17 21:30:12 -05:00

audit.h

…

auditfilter.c

[PATCH] minor update to rule add/delete messages (ver 2)

2007-02-17 21:30:09 -05:00

auditsc.c

[PATCH] fix deadlock in audit_log_task_context()

2007-03-14 15:27:48 -07:00

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

…

configs.c

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cpu.c

[PATCH] Fix microcode-related suspend problem

2007-04-02 10:06:09 -07:00

cpuset.c

[PATCH] cpuset: prevent information leak in cpuset_tasks_read (CVE-2007-2875)

2007-06-07 14:25:31 -07:00

delayacct.c

…

dma.c

…

exec_domain.c

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exit.c

[PATCH] pid: Properly detect orphaned process groups in exit_notify

2007-03-29 08:16:23 -07:00

extable.c

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fork.c

[PATCH] initialise pi_lock if CONFIG_RT_MUTEXES=N

2007-03-16 19:25:06 -07:00

futex_compat.c

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futex.c

[PATCH] futex: PI state locking fix

2007-03-16 19:25:06 -07:00

hrtimer.c

[PATCH] high-res timers: resume fix

2007-04-07 10:03:43 -07:00

itimer.c

[PATCH] hrtimers: prevent possible itimer DoS

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

kallsyms.c

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Kconfig.hz

…

Kconfig.preempt

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kexec.c

…

kfifo.c

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kmod.c

Revert "Driver core: let request_module() send a /sys/modules/kmod/-uevent"

2007-02-23 14:54:57 -08:00

kprobes.c

[PATCH] kprobes: list all active probes in the system

2007-02-20 17:10:14 -08:00

ksysfs.c

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kthread.c

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latency.c

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lockdep_internals.h

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lockdep_proc.c

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

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

lockdep.c

[PATCH] lockdep: debug_show_all_locks & debug_show_held_locks vs. debug_locks

2007-03-22 19:39:06 -07:00

Makefile

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

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

module.c

[PATCH] driver core: fix built-in drivers sysfs links

2007-04-02 10:06:09 -07:00

mutex-debug.c

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

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

mutex-debug.h

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mutex.c

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mutex.h

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nsproxy.c

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panic.c

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params.c

[PATCH] fix kernel oops with badly formatted module option

2007-04-12 15:31:41 -07:00

pid.c

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posix-cpu-timers.c

[PATCH] posix timers: RCU optimization for clock_gettime()

2007-02-16 08:14:00 -08:00

posix-timers.c

[PATCH] hrtimers: add high resolution timer support

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

printk.c

kernel/printk.c: comment fix

2007-02-17 20:10:16 +01:00

profile.c

…

ptrace.c

…

rcupdate.c

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rcutorture.c

[PATCH] Publish rcutorture module parameters via sysfs, read-only

2007-03-06 09:30:25 -08:00

relay.c

[PATCH] kernel-doc fixes for 2.6.20-git15 (non-drivers)

2007-03-01 14:53:37 -08:00

resource.c

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

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

rtmutex_common.h

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rtmutex-debug.c

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rtmutex-debug.h

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rtmutex-tester.c

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rtmutex.c

[PATCH] hrtimers: namespace and enum cleanup

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

rtmutex.h

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rwsem.c

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sched.c

[PATCH] Prevent going idle with softirq pending

2007-06-11 11:36:45 -07:00

seccomp.c

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signal.c

Merge master.kernel.org:/pub/scm/linux/kernel/git/kyle/parisc-2.6

2007-02-26 12:48:06 -08:00

softirq.c

[PATCH] tick-management: dyntick / highres functionality

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

softlockup.c

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spinlock.c

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srcu.c

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stacktrace.c

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stop_machine.c

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sys_ni.c

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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

Allow reading tainted flag as user

2007-04-24 08:23:08 -07:00

taskstats.c

…

time.c

[PATCH] kernel/time.c: add missing symbol exports

2007-04-04 17:35:53 -07:00

timer.c

[PATCH] clocksource: fix resume logic

2007-05-23 14:32:48 -07:00

tsacct.c

[PATCH] time: x86_64: split x86_64/kernel/time.c up

2007-02-16 08:14:00 -08:00

uid16.c

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user.c

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utsname_sysctl.c

[PATCH] sysctl: remove insert_at_head from register_sysctl

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

utsname.c

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wait.c

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workqueue.c

[PATCH] Add debugging feature /proc/timer_stat

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