sched, trace: update trace_sched_wakeup()

Impact: extend the wakeup tracepoint with the info whether the wakeup was real

Add the information needed to distinguish 'real' wakeups from 'false'
wakeups.

Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/include/trace/sched.h b/include/trace/sched.h
index bc4c9ea..0d81098 100644 (file)
--- a/include/trace/sched.h
+++ b/include/trace/sched.h
@@ -17,8 +17,8 @@ DECLARE_TRACE(sched_wait_task,
                TPARGS(rq, p));
 
 DECLARE_TRACE(sched_wakeup,
-       TPPROTO(struct rq *rq, struct task_struct *p),
-               TPARGS(rq, p));
+       TPPROTO(struct rq *rq, struct task_struct *p, int success),
+               TPARGS(rq, p, success));
 
 DECLARE_TRACE(sched_wakeup_new,
        TPPROTO(struct rq *rq, struct task_struct *p, int success),

diff --git a/kernel/sched.c b/kernel/sched.c
index ceda579..dcb39bc 100644 (file)
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -2324,7 +2324,7 @@ out_activate:
        success = 1;
 
 out_running:
-       trace_sched_wakeup(rq, p);
+       trace_sched_wakeup(rq, p, success);
        check_preempt_curr(rq, p, sync);
 
        p->state = TASK_RUNNING;

diff --git a/kernel/trace/trace_sched_switch.c b/kernel/trace/trace_sched_switch.c
index add2c1f..df175cb 100644 (file)
--- a/kernel/trace/trace_sched_switch.c
+++ b/kernel/trace/trace_sched_switch.c
@@ -49,7 +49,7 @@ probe_sched_switch(struct rq *__rq, struct task_struct *prev,
 }
 
 static void
-probe_sched_wakeup(struct rq *__rq, struct task_struct *wakee)
+probe_sched_wakeup(struct rq *__rq, struct task_struct *wakee, int success)
 {
        struct trace_array_cpu *data;
        unsigned long flags;

diff --git a/kernel/trace/trace_sched_wakeup.c b/kernel/trace/trace_sched_wakeup.c
index 0067b49..43586b6 100644 (file)
--- a/kernel/trace/trace_sched_wakeup.c
+++ b/kernel/trace/trace_sched_wakeup.c
@@ -211,7 +211,7 @@ static void wakeup_reset(struct trace_array *tr)
 }
 
 static void
-probe_wakeup(struct rq *rq, struct task_struct *p)
+probe_wakeup(struct rq *rq, struct task_struct *p, int success)
 {
        int cpu = smp_processor_id();
        unsigned long flags;