Matt Wagantall e1b2469529 trace: cpu_freq_switch: Add profiler for CPU frequency switch times ... It is sometimes useful to profile how long CPU frequency switches take, and traces have already been added for this purpose. Make use of these and the trace_stat framework to generate statistical histograms of frequency switch times in the following format: # cat /sys/kernel/debug/tracing/trace_stat/cpu_freq_switch CPU START_KHZ END_KHZ COUNT AVG_US MIN_US MAX_US | | | | | | | 0 384000 1512000 3 2787 1648 3418 0 486000 384000 1 1129 1129 1129 0 1458000 384000 1 3174 3174 3174 0 1512000 384000 1 3265 3265 3265 0 1512000 486000 1 3235 3235 3235 0 1512000 1458000 1 213 213 213 0 1512000 1512000 1 0 0 0 Profiling is disabled by default (since it does incur some overhead). It can be enabled or re-disabled echoing 1 or 0 to /sys/kernel/debug/tracing/cpu_freq_switch_profile_enabled Change-Id: I3ef7f9d681b7bd13bcaa031003b10312afe1aefe Signed-off-by: Matt Wagantall <mattw@codeaurora.org>		2016-03-23 20:57:45 -07:00
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blktrace.c	block/fs: keep track of the task that dirtied the page	2016-03-22 11:02:00 -07:00
bpf_trace.c	bpf: make tracing helpers gpl only	2015-10-26 21:53:34 -07:00
ftrace.c	Most of the changes are clean ups and small fixes. Some of them have	2015-11-06 13:30:20 -08:00
gpu-traces.c	trace/events: add gpu trace events	2016-02-16 13:53:26 -08:00
ipc_logging.c	trace: ipc_logging: Use virtual counter	2016-03-22 11:07:57 -07:00
ipc_logging_debug.c	trace: Add snapshot of ipc_logging driver	2016-03-22 11:07:56 -07:00
ipc_logging_private.h	trace: Add snapshot of ipc_logging driver	2016-03-22 11:07:56 -07:00
Kconfig	trace: cpu_freq_switch: Add profiler for CPU frequency switch times	2016-03-23 20:57:45 -07:00
Makefile	trace: cpu_freq_switch: Add profiler for CPU frequency switch times	2016-03-23 20:57:45 -07:00
msm_rtb.c	trace: rtb: disable RTB in the first panic notifier	2016-03-01 12:22:26 -08:00
power-traces.c	PM / sleep: export suspend_resume trace event	2015-01-30 02:10:41 +01:00
ring_buffer.c	ring-buffer: Put back the length if crossed page with add_timestamp	2015-11-24 09:27:25 -05:00
ring_buffer_benchmark.c	ring_buffer: Remove unneeded smp_wmb() before wakeup of reader benchmark	2015-11-03 16:19:02 -05:00
rpm-traces.c	PM / Runtime: Introduce trace points for tracing rpm_* functions	2011-09-27 22:53:27 +02:00
trace.c	Merge remote-tracking branch 'lsk-44/linux-linaro-lsk-v4.4' into 44rc2	2016-03-23 20:51:00 -07:00
trace.h	trace: Add an option to show tgids in trace output	2016-02-16 13:53:27 -08:00
trace_benchmark.c	tracing: Only benchmark the time tracepoints take if tracing is on	2015-11-02 13:34:58 -05:00
trace_benchmark.h	tracing: Add tracepoint benchmark tracepoint	2014-05-29 22:49:54 -04:00
trace_branch.c	tracing: Remove {start,stop}_branch_trace	2015-10-21 10:10:09 -04:00
trace_clock.c	tracing: Export tracing clock functions	2015-05-12 15:56:57 -04:00
trace_cpu_freq_switch.c	trace: cpu_freq_switch: Add profiler for CPU frequency switch times	2016-03-23 20:57:45 -07:00
trace_entries.h	tracing: %pF is only for function pointers	2015-03-25 08:57:22 -04:00
trace_event_perf.c	treewide: Remove old email address	2015-11-23 09:44:58 +01:00
trace_events.c	tracing: Add sched_wakeup_new and sched_waking tracepoints for pid filter	2015-12-01 16:08:05 -05:00
trace_events_filter.c	tracing: is_legal_op() can return boolean	2015-11-02 14:26:51 -05:00
trace_events_filter_test.h	tracing/filter: Add startup tests for events filter	2011-08-19 14:35:59 -04:00
trace_events_trigger.c	tracing: Rename ftrace_raw_##call event structures to trace_event_raw_##call	2015-05-13 21:48:40 -04:00
trace_export.c	tracing: ftrace_event_is_function() can return boolean	2015-11-02 14:28:05 -05:00
trace_functions.c	tracing/trivial: Fix typos and make an int into a bool	2014-11-20 10:05:36 -05:00
trace_functions_graph.c	trace: add non-hierarchical function_graph option	2016-02-16 13:53:27 -08:00
trace_irqsoff.c	tracing: report_latency() in trace_irqsoff.c can return boolean	2015-11-02 14:20:19 -05:00
trace_kdb.c	tracing: Move trace_flags from global to a trace_array field	2015-09-30 15:22:55 -04:00
trace_kprobe.c	lib: introduce strncpy_from_unsafe()	2015-08-28 16:27:27 -07:00
trace_mmiotrace.c	tracing: Pass trace_array into trace_buffer_unlock_commit()	2015-09-25 17:38:44 -04:00
trace_nop.c	tracing: Remove unneeded includes of debugfs.h and fs.h	2015-01-22 11:19:48 -05:00
trace_output.c	trace: fix compilation for 4.1	2016-02-16 13:53:29 -08:00
trace_output.h	tracing: Turn seq_print_user_ip() into a static function	2015-09-28 10:16:12 -04:00
trace_printk.c	tracing: Fix setting of start_index in find_next()	2016-01-04 15:22:47 -05:00
trace_probe.c	trace: Don't use __weak in header files	2015-03-25 08:57:23 -04:00
trace_probe.h	kernel/trace_probe: is_good_name can be boolean	2015-09-22 13:11:30 -04:00
trace_sched_switch.c	sched/core: Fix trace_sched_switch()	2015-10-06 17:08:15 +02:00
trace_sched_wakeup.c	sched: add affinity, task load information to sched tracepoints	2016-03-23 19:59:31 -07:00
trace_selftest.c	Seems that Peter Zijlstra added a new check that is making old	2014-10-12 07:28:55 -04:00
trace_selftest_dynamic.c	ftrace: Add self-tests for multiple function trace users	2011-05-18 19:24:51 -04:00
trace_seq.c	tracing: use %*pb[l] to print bitmaps including cpumasks and nodemasks	2015-02-13 21:21:37 -08:00
trace_stack.c	tracing/stacktrace: Show entire trace if passed in function not found	2016-02-17 12:30:57 -08:00
trace_stat.c	tracing: Convert the tracing facility over to use tracefs	2015-02-03 12:48:41 -05:00
trace_stat.h
trace_syscalls.c	tracing: Move trace_flags from global to a trace_array field	2015-09-30 15:22:55 -04:00
trace_uprobe.c	tracing/uprobes: Do not print '0x (null)' when offset is 0	2015-08-26 10:43:01 -03:00