Peter Zijlstra 35af99e646 sched/clock, x86: Use a static_key for sched_clock_stable ...

In order to avoid the runtime condition and variable load turn
sched_clock_stable into a static_key.

Also provide a shorter implementation of local_clock() and
cpu_clock(int) when sched_clock_stable==1.

                        MAINLINE   PRE       POST

    sched_clock_stable: 1          1         1
    (cold) sched_clock: 329841     221876    215295
    (cold) local_clock: 301773     234692    220773
    (warm) sched_clock: 38375      25602     25659
    (warm) local_clock: 100371     33265     27242
    (warm) rdtsc:       27340      24214     24208
    sched_clock_stable: 0          0         0
    (cold) sched_clock: 382634     235941    237019
    (cold) local_clock: 396890     297017    294819
    (warm) sched_clock: 38194      25233     25609
    (warm) local_clock: 143452     71234     71232
    (warm) rdtsc:       27345      24245     24243

Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Link: http://lkml.kernel.org/n/tip-eummbdechzz37mwmpags1gjr@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>

2014-01-13 15:13:13 +01:00

..

alarmtimer.c

alarmtimer: return EINVAL instead of ENOTSUPP if rtcdev doesn't exist

2013-10-18 16:23:58 -07:00

clockevents.c

Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2013-11-12 10:36:00 +09:00

clocksource.c

time: Fix signedness bug in sysfs_get_uname() and its callers

2013-10-18 16:45:58 -07:00

jiffies.c

time: Kill xtime_lock, replacing it with jiffies_lock

2012-11-13 14:08:23 -05:00

Kconfig

nohz: Drop generic vtime obsolete dependency on CONFIG_64BIT

2013-09-30 15:37:01 +02:00

Makefile

sched_clock: Make ARM's sched_clock generic for all architectures

2013-06-12 14:02:13 -07:00

ntp_internal.h

ntp: Rework do_adjtimex to take timespec and tai arguments

2013-04-04 13:18:15 -07:00

ntp.c

Linux 3.12-rc3

2013-10-03 07:52:21 +02:00

posix-clock.c

kernel: Fix files explicitly needing EXPORT_SYMBOL infrastructure

2011-10-31 19:30:05 -04:00

sched_clock.c

sched_clock: Remove sched_clock_func() hook

2013-10-09 16:54:39 -07:00

tick-broadcast.c

tick: broadcast: Deny per-cpu clockevents from being broadcast sources

2013-10-02 11:34:06 +02:00

tick-common.c

tick: Document tick_do_timer_cpu

2013-11-19 14:59:50 +01:00

tick-internal.h

time: Fix signedness bug in sysfs_get_uname() and its callers

2013-10-18 16:45:58 -07:00

tick-oneshot.c

clockevents: Make minimum delay adjustments configurable

2011-09-08 11:10:56 +02:00

tick-sched.c

sched/clock, x86: Use a static_key for sched_clock_stable

2014-01-13 15:13:13 +01:00

timeconv.c

time: add function to convert between calendar time and broken-down time for universal use

2009-09-24 07:20:56 -07:00

timekeeping_debug.c

power: Add option to log time spent in suspend

2013-05-29 12:57:34 -07:00

timekeeping_internal.h

power: Add option to log time spent in suspend

2013-05-29 12:57:34 -07:00

timekeeping.c

time: Fix 1ns/tick drift w/ GENERIC_TIME_VSYSCALL_OLD

2013-11-22 21:08:11 +01:00

timer_list.c

timer_list: correct the iterator for timer_list

2013-08-28 19:26:38 -07:00

timer_stats.c

timer stats: Add a 'Collection: active/inactive' line to timer usage statistics

2013-10-10 09:59:25 +02:00