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ftrace: sched special

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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 21:20:53 +02:00 committed by Thomas Gleixner
parent 36fc25a9f4
commit 88a4216c3e
4 changed files with 36 additions and 3 deletions
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6
include/linux/sched.h
View file

@ -2138,6 +2138,8 @@ extern void
ftrace_wake_up_task(void *rq, struct task_struct *wakee,
struct task_struct *curr);
extern void ftrace_all_fair_tasks(void *__rq, void *__tr, void *__data);
extern void
ftrace_special(unsigned long arg1, unsigned long arg2, unsigned long arg3);
#else
static inline void
ftrace_ctx_switch(void *rq, struct task_struct *prev, struct task_struct *next)
@ -2155,6 +2157,10 @@ ftrace_wake_up_task(void *rq, struct task_struct *wakee,
static inline void ftrace_all_fair_tasks(void *__rq, void *__tr, void *__data)
{
}
static inline void
ftrace_special(unsigned long arg1, unsigned long arg2, unsigned long arg3)
{
}
#endif
extern long sched_setaffinity(pid_t pid, const cpumask_t *new_mask);

3
kernel/sched_fair.c
View file

@ -1061,6 +1061,8 @@ wake_affine(struct rq *rq, struct sched_domain *this_sd, struct rq *this_rq,
if (!(this_sd->flags & SD_WAKE_AFFINE))
return 0;
ftrace_special(__LINE__, curr->se.avg_overlap, sync);
ftrace_special(__LINE__, p->se.avg_overlap, -1);
/*
* If the currently running task will sleep within
* a reasonable amount of time then attract this newly
@ -1238,6 +1240,7 @@ static void check_preempt_wakeup(struct rq *rq, struct task_struct *p)
if (unlikely(se == pse))
return;
ftrace_special(__LINE__, p->pid, se->last_wakeup);
cfs_rq_of(pse)->next = pse;
/*

6
kernel/trace/trace.c
View file

@ -1251,7 +1251,7 @@ print_lat_fmt(struct trace_iterator *iter, unsigned int trace_idx, int cpu)
comm);
break;
case TRACE_SPECIAL:
trace_seq_printf(s, " %ld %ld %ld\n",
trace_seq_printf(s, "# %ld %ld %ld\n",
entry->special.arg1,
entry->special.arg2,
entry->special.arg3);
@ -1335,7 +1335,7 @@ static int print_trace_fmt(struct trace_iterator *iter)
return 0;
break;
case TRACE_SPECIAL:
ret = trace_seq_printf(s, " %ld %ld %ld\n",
ret = trace_seq_printf(s, "# %ld %ld %ld\n",
entry->special.arg1,
entry->special.arg2,
entry->special.arg3);
@ -1400,7 +1400,7 @@ static int print_raw_fmt(struct trace_iterator *iter)
break;
case TRACE_SPECIAL:
case TRACE_STACK:
ret = trace_seq_printf(s, " %ld %ld %ld\n",
ret = trace_seq_printf(s, "# %ld %ld %ld\n",
entry->special.arg1,
entry->special.arg2,
entry->special.arg3);

24
kernel/trace/trace_sched_switch.c
View file

@ -103,6 +103,30 @@ ftrace_wake_up_task(void *__rq, struct task_struct *wakee,
wakeup_sched_wakeup(wakee, curr);
}
void
ftrace_special(unsigned long arg1, unsigned long arg2, unsigned long arg3)
{
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))
__trace_special(tr, data, arg1, arg2, arg3);
atomic_dec(&data->disabled);
local_irq_restore(flags);
}
static void sched_switch_reset(struct trace_array *tr)
{
int cpu;