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ftrace: add wakeup events to sched tracer

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Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Ingo Molnar
2008-05-12 21:20:51 +02:00
committed by Thomas Gleixner
parent e309b41dd6
commit 57422797dc
5 changed files with 88 additions and 5 deletions
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36
kernel/trace/trace_sched_switch.c
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@@ -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;