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author | Ingo Molnar <mingo@elte.hu> | 2008-05-12 19:20:51 (GMT) |
---|---|---|
committer | Thomas Gleixner <tglx@linutronix.de> | 2008-05-23 19:04:06 (GMT) |
commit | 57422797dc009fc83766bcf230d29dbe6e08e21e (patch) | |
tree | 9ba5768539c08d99679f72a9709f5e345fd359c9 /kernel/trace/trace_sched_switch.c | |
parent | e309b41dd65aa953f86765eeeecc941d8e1e8b8f (diff) | |
download | linux-57422797dc009fc83766bcf230d29dbe6e08e21e.tar.xz |
ftrace: add wakeup events to sched tracer
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'kernel/trace/trace_sched_switch.c')
-rw-r--r-- | kernel/trace/trace_sched_switch.c | 36 |
1 files changed, 36 insertions, 0 deletions
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; |