redonkable/remarkable-linux
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remarkable-linux/kernel/trace
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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
power-traces.c
ring_buffer.c sched/clock, x86: Use a static_key for sched_clock_stable 2014-01-13 15:13:13 +01:00
ring_buffer_benchmark.c
rpm-traces.c
trace.c This batch of changes is mostly clean ups and small bug fixes. 2013-11-16 12:23:18 -08:00
trace.h This batch of changes is mostly clean ups and small bug fixes. 2013-11-16 12:23:18 -08:00
trace_branch.c tracing: Update event filters for multibuffer 2013-11-05 16:50:20 -05:00
trace_clock.c
trace_entries.h
trace_event_perf.c perf/trace: Properly use u64 to hold event_id 2013-11-19 16:57:44 +01:00
trace_events.c tracing: Only run synchronize_sched() at instance deletion time 2013-12-05 14:22:30 -05:00
trace_events_filter.c tracing: Update event filters for multibuffer 2013-11-05 16:50:20 -05:00
trace_events_filter_test.h
trace_export.c tracing: Update event filters for multibuffer 2013-11-05 16:50:20 -05:00
trace_functions.c tracing: Add ref_data to function and fgraph tracer structs 2013-07-18 21:31:31 -04:00
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_irqsoff.c tracing: Use flag buffer_disabled for irqsoff tracer 2013-07-01 20:34:28 -04:00
trace_kdb.c
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
trace_printk.c tracing: Add __tracepoint_string() to export string pointers 2013-07-26 13:39:44 -04:00
trace_probe.c
trace_probe.h
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.c sched/deadline: Add latency tracing for SCHED_DEADLINE tasks 2014-01-13 13:41:11 +01:00
trace_selftest_dynamic.c
trace_stack.c Tracing updates for Linux 3.10 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