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

..

blktrace.c

kernel: trace: blktrace: remove redundent memcpy() in compat_blk_trace_setup()

2013-11-08 09:04:30 -07:00

ftrace.c

ftrace: Initialize the ftrace profiler for each possible cpu

2013-12-16 10:53:46 -05:00

Kconfig

ring-buffer: Select IRQ_WORK

2013-05-03 19:24:17 -04:00

Makefile

trace: Stop compiling in trace_clock unconditionally

2012-09-13 22:52:08 -04:00

power-traces.c

PM / tracing: remove deprecated power trace API

2013-01-26 00:39:12 +01:00

ring_buffer_benchmark.c

…

ring_buffer.c

sched/clock, x86: Use a static_key for sched_clock_stable

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

rpm-traces.c

…

trace_branch.c

tracing: Update event filters for multibuffer

2013-11-05 16:50:20 -05:00

trace_clock.c

tracing: Add "uptime" trace clock that uses jiffies

2013-03-15 00:36:09 -04:00

trace_entries.h

tracing: Add trace_puts() for even faster trace_printk() tracing

2013-03-15 00:35:55 -04:00

trace_event_perf.c

perf/trace: Properly use u64 to hold event_id

2013-11-19 16:57:44 +01:00

trace_events_filter_test.h

…

trace_events_filter.c

tracing: Update event filters for multibuffer

2013-11-05 16:50:20 -05:00

trace_events.c

tracing: Only run synchronize_sched() at instance deletion time

2013-12-05 14:22:30 -05:00

trace_export.c

tracing: Update event filters for multibuffer

2013-11-05 16:50:20 -05:00

trace_functions_graph.c

tracing: Do not use signed enums with unsigned long long in fgragh output

2013-11-06 15:26:56 -05:00

trace_functions.c

tracing: Add ref_data to function and fgraph tracer structs

2013-07-18 21:31:31 -04:00

trace_irqsoff.c

tracing: Use flag buffer_disabled for irqsoff tracer

2013-07-01 20:34:28 -04:00

trace_kdb.c

tracing: Consolidate max_tr into main trace_array structure

2013-03-15 00:35:40 -04:00

trace_kprobe.c

tracing: Update event filters for multibuffer

2013-11-05 16:50:20 -05:00

trace_mmiotrace.c

tracing: Update event filters for multibuffer

2013-11-05 16:50:20 -05:00

trace_nop.c

…

trace_output.c

ftrace, sched: Add TRACE_FLAG_PREEMPT_RESCHED

2013-11-11 12:43:39 +01:00

trace_output.h

tracing: Rename trace_event_mutex to trace_event_sem

2013-03-15 13:22:10 -04:00

trace_printk.c

tracing: Add __tracepoint_string() to export string pointers

2013-07-26 13:39:44 -04:00

trace_probe.c

tracing: Replace strict_strto* with kstrto*

2012-10-31 16:45:23 -04:00

trace_probe.h

uprobes/tracing: Introduce is_trace_uprobe_enabled()

2013-02-08 18:24:30 +01:00

trace_sched_switch.c

tracing: Update event filters for multibuffer

2013-11-05 16:50:20 -05:00

trace_sched_wakeup.c

sched/deadline: Add SCHED_DEADLINE inheritance logic

2014-01-13 13:42:56 +01:00

trace_selftest_dynamic.c

…

trace_selftest.c

sched/deadline: Add latency tracing for SCHED_DEADLINE tasks

2014-01-13 13:41:11 +01:00

trace_stack.c

Merge tag 'trace-3.10' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

2013-04-29 13:55:38 -07:00

trace_stat.c

trace/trace_stat: use rbtree postorder iteration helper instead of opencoding

2013-11-05 16:01:47 -05:00

trace_stat.h

…

trace_syscalls.c

tracing: Only run synchronize_sched() at instance deletion time

2013-12-05 14:22:30 -05:00

trace_uprobe.c

tracing: Update event filters for multibuffer

2013-11-05 16:50:20 -05:00

trace.c

Merge tag 'trace-3.13' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

2013-11-16 12:23:18 -08:00

trace.h

Merge tag 'trace-3.13' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

2013-11-16 12:23:18 -08:00