Steven Rostedt 6cd8a4bb2f ftrace: trace preempt off critical timings ... Add preempt off timings. A lot of kernel core code is taken from the RT patch latency trace that was written by Ingo Molnar. This adds "preemptoff" and "preemptirqsoff" to /debugfs/tracing/available_tracers Now instead of just tracing irqs off, preemption off can be selected to be recorded. When this is selected, it shares the same files as irqs off timings. One can either trace preemption off, irqs off, or one or the other off. By echoing "preemptoff" into /debugfs/tracing/current_tracer, recording of preempt off only is performed. "irqsoff" will only record the time irqs are disabled, but "preemptirqsoff" will take the total time irqs or preemption are disabled. Runtime switching of these options is now supported by simpling echoing in the appropriate trace name into /debugfs/tracing/current_tracer. Signed-off-by: Steven Rostedt <srostedt@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>		2008-05-23 20:32:54 +02:00
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ftrace.c
Kconfig	ftrace: trace preempt off critical timings	2008-05-23 20:32:54 +02:00
Makefile	ftrace: trace preempt off critical timings	2008-05-23 20:32:54 +02:00
trace.c
trace.h
trace_functions.c	ftrace: function tracer	2008-05-23 20:32:13 +02:00
trace_irqsoff.c	ftrace: trace preempt off critical timings	2008-05-23 20:32:54 +02:00
trace_sched_switch.c	ftrace: add tracing of context switches	2008-05-23 20:32:27 +02:00
trace_sched_wakeup.c	ftrace: tracer for scheduler wakeup latency	2008-05-23 20:32:36 +02:00