From 57422797dc009fc83766bcf230d29dbe6e08e21e Mon Sep 17 00:00:00 2001 From: Ingo Molnar Date: Mon, 12 May 2008 21:20:51 +0200 Subject: ftrace: add wakeup events to sched tracer Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner --- kernel/trace/trace_sched_switch.c | 36 ++++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) (limited to 'kernel/trace/trace_sched_switch.c') diff --git a/kernel/trace/trace_sched_switch.c b/kernel/trace/trace_sched_switch.c index b738eac..8b1cf1a 100644 --- a/kernel/trace/trace_sched_switch.c +++ b/kernel/trace/trace_sched_switch.c @@ -41,6 +41,29 @@ ctx_switch_func(struct task_struct *prev, struct task_struct *next) local_irq_restore(flags); } +static void wakeup_func(struct task_struct *wakee, struct task_struct *curr) +{ + struct trace_array *tr = ctx_trace; + struct trace_array_cpu *data; + unsigned long flags; + long disabled; + int cpu; + + if (!tracer_enabled) + return; + + local_irq_save(flags); + cpu = raw_smp_processor_id(); + data = tr->data[cpu]; + disabled = atomic_inc_return(&data->disabled); + + if (likely(disabled == 1)) + tracing_sched_wakeup_trace(tr, data, wakee, curr, flags); + + atomic_dec(&data->disabled); + local_irq_restore(flags); +} + void ftrace_ctx_switch(struct task_struct *prev, struct task_struct *next) { tracing_record_cmdline(prev); @@ -57,6 +80,19 @@ void ftrace_ctx_switch(struct task_struct *prev, struct task_struct *next) wakeup_sched_switch(prev, next); } +void +ftrace_wake_up_task(struct task_struct *wakee, struct task_struct *curr) +{ + tracing_record_cmdline(curr); + + wakeup_func(wakee, curr); + + /* + * Chain to the wakeup tracer (this is a NOP if disabled): + */ + wakeup_sched_wakeup(wakee, curr); +} + static void sched_switch_reset(struct trace_array *tr) { int cpu; -- cgit v1.1