linux/kernel/trace
Steven Rostedt e1e232ca6b tracing: Add trace_clock=<clock> kernel parameter
Being able to change the trace clock at boot can be advantageous if
you need a better source of when things happen across CPUs. The default
trace clock is the fastest, but it uses local clocks which may not be
synced across CPUs and it does not let you know when events took place
with respect to events on other CPUs.

The global trace clock can help in this case, and if you do not care
about timings, the counter "clock" is the best, as that is just a  simple
atomic counter that is incremented for every event.

Usage is to add "trace_clock=counter" on the kernel command line. You
can replace counter with "global" or any of the clocks listed in
/sys/kernel/debug/tracing/trace_clock

Suggested-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Appreciated-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2014-02-20 12:32:54 -05:00
..
blktrace.c tracing: Pass trace_array to set_flag callback 2014-02-20 12:13:07 -05:00
ftrace.c ftrace: Allow for function tracing instance to filter functions 2014-02-20 12:29:07 -05:00
Kconfig ring-buffer: Select IRQ_WORK 2013-05-03 19:24:17 -04:00
Makefile tracing: Add basic event trigger framework 2013-12-20 18:40:22 -05:00
power-traces.c PM / tracing: remove deprecated power trace API 2013-01-26 00:39:12 +01:00
ring_buffer_benchmark.c tracing: Use NUMA allocation for per-cpu ring buffer pages 2011-06-14 22:04:39 -04:00
ring_buffer.c ring-buffer: Fix first commit on sub-buffer having non-zero delta 2014-02-11 13:38:54 -05:00
rpm-traces.c PM / Runtime: Introduce trace points for tracing rpm_* functions 2011-09-27 22:53:27 +02:00
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 tracing/filter: Add startup tests for events filter 2011-08-19 14:35:59 -04:00
trace_events_filter.c tracing: Add and use generic set_trigger_filter() implementation 2013-12-21 22:02:17 -05:00
trace_events_trigger.c tracing: Show available event triggers when no trigger is set 2014-01-09 21:20:32 -05:00
trace_events.c tracing: Move ftrace_event_file() out of DYNAMIC_FTRACE ifdef 2013-12-21 22:02:17 -05:00
trace_export.c tracing: Update event filters for multibuffer 2013-11-05 16:50:20 -05:00
trace_functions_graph.c tracing: Pass trace_array to set_flag callback 2014-02-20 12:13:07 -05:00
trace_functions.c ftrace: Allow for function tracing instance to filter functions 2014-02-20 12:29:07 -05:00
trace_irqsoff.c tracing: Pass trace_array to flag_changed callback 2014-02-20 12:13:08 -05:00
trace_kdb.c tracing: Consolidate max_tr into main trace_array structure 2013-03-15 00:35:40 -04:00
trace_kprobe.c tracing/uprobes: Support ftrace_event_file base multibuffer 2014-02-20 12:30:09 -05:00
trace_mmiotrace.c tracing: Update event filters for multibuffer 2013-11-05 16:50:20 -05:00
trace_nop.c tracing: Set up infrastructure to allow tracers for instances 2014-02-20 12:13:10 -05:00
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/uprobes: Add @+file_offset fetch method 2014-01-02 20:57:05 -05:00
trace_probe.h tracing/uprobes: Support ftrace_event_file base multibuffer 2014-02-20 12:30:09 -05:00
trace_sched_switch.c tracing: Update event filters for multibuffer 2013-11-05 16:50:20 -05:00
trace_sched_wakeup.c tracing: Pass trace_array to flag_changed callback 2014-02-20 12:13:08 -05:00
trace_selftest_dynamic.c ftrace: Add self-tests for multiple function trace users 2011-05-18 19:24:51 -04:00
trace_selftest.c sched/deadline: Add latency tracing for SCHED_DEADLINE tasks 2014-01-13 13:41:11 +01:00
trace_stack.c tracing: Add generic tracing_lseek() function 2014-01-02 16:17:12 -05:00
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: Consolidate event trigger code 2014-01-09 21:20:07 -05:00
trace_uprobe.c tracing/uprobes: Support mix of ftrace and perf 2014-02-20 12:30:11 -05:00
trace.c tracing: Add trace_clock=<clock> kernel parameter 2014-02-20 12:32:54 -05:00
trace.h ftrace: Allow for function tracing instance to filter functions 2014-02-20 12:29:07 -05:00