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authorIngo Molnar <mingo@elte.hu>2008-05-12 21:20:46 +0200
committerThomas Gleixner <tglx@linutronix.de>2008-05-23 20:42:31 +0200
commit750ed1a40783432d0dcb0e6c2e813a12615d7664 (patch)
treedc2d0eae703ec2ad3fe9a5bc657da5dbe0af2385 /kernel
parent4bf39a9411a4ce8712954e03a9bd1592ee345919 (diff)
ftrace: timestamp syncing, prepare
rename and uninline now() to ftrace_now(). Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/trace/ftrace.c4
-rw-r--r--kernel/trace/trace.c7
-rw-r--r--kernel/trace/trace.h5
-rw-r--r--kernel/trace/trace_functions.c2
-rw-r--r--kernel/trace/trace_irqsoff.c6
-rw-r--r--kernel/trace/trace_sched_switch.c2
-rw-r--r--kernel/trace/trace_sched_wakeup.c4
7 files changed, 16 insertions, 14 deletions
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 97c40865a93..a15e068535f 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -531,7 +531,7 @@ static int notrace __ftrace_update_code(void *ignore)
save_ftrace_enabled = ftrace_enabled;
ftrace_enabled = 0;
- start = now(raw_smp_processor_id());
+ start = ftrace_now(raw_smp_processor_id());
ftrace_update_cnt = 0;
/* No locks needed, the machine is stopped! */
@@ -550,7 +550,7 @@ static int notrace __ftrace_update_code(void *ignore)
}
- stop = now(raw_smp_processor_id());
+ stop = ftrace_now(raw_smp_processor_id());
ftrace_update_time = stop - start;
ftrace_update_tot_cnt += ftrace_update_cnt;
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 4550afda960..e3778ab0d3f 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -42,6 +42,11 @@ ns2usecs(cycle_t nsec)
return nsec;
}
+notrace cycle_t ftrace_now(int cpu)
+{
+ return cpu_clock(cpu);
+}
+
static atomic_t tracer_counter;
static struct trace_array global_trace;
@@ -607,7 +612,7 @@ tracing_generic_entry_update(struct trace_entry *entry, unsigned long flags)
entry->idx = atomic_inc_return(&tracer_counter);
entry->preempt_count = pc & 0xff;
entry->pid = tsk->pid;
- entry->t = now(raw_smp_processor_id());
+ entry->t = ftrace_now(raw_smp_processor_id());
entry->flags = (irqs_disabled_flags(flags) ? TRACE_FLAG_IRQS_OFF : 0) |
((pc & HARDIRQ_MASK) ? TRACE_FLAG_HARDIRQ : 0) |
((pc & SOFTIRQ_MASK) ? TRACE_FLAG_SOFTIRQ : 0) |
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index b0408356f0e..30cad677e9d 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -171,10 +171,7 @@ void update_max_tr(struct trace_array *tr, struct task_struct *tsk, int cpu);
void update_max_tr_single(struct trace_array *tr,
struct task_struct *tsk, int cpu);
-static inline notrace cycle_t now(int cpu)
-{
- return cpu_clock(cpu);
-}
+extern notrace cycle_t ftrace_now(int cpu);
#ifdef CONFIG_SCHED_TRACER
extern void notrace
diff --git a/kernel/trace/trace_functions.c b/kernel/trace/trace_functions.c
index 5d8ad7a0960..e5d34b78fc9 100644
--- a/kernel/trace/trace_functions.c
+++ b/kernel/trace/trace_functions.c
@@ -20,7 +20,7 @@ static notrace void function_reset(struct trace_array *tr)
{
int cpu;
- tr->time_start = now(tr->cpu);
+ tr->time_start = ftrace_now(tr->cpu);
for_each_online_cpu(cpu)
tracing_reset(tr->data[cpu]);
diff --git a/kernel/trace/trace_irqsoff.c b/kernel/trace/trace_irqsoff.c
index 2dfebb67fdf..d2a6e6f1ad2 100644
--- a/kernel/trace/trace_irqsoff.c
+++ b/kernel/trace/trace_irqsoff.c
@@ -136,7 +136,7 @@ check_critical_timing(struct trace_array *tr,
* as long as possible:
*/
T0 = data->preempt_timestamp;
- T1 = now(cpu);
+ T1 = ftrace_now(cpu);
delta = T1-T0;
local_save_flags(flags);
@@ -186,7 +186,7 @@ out_unlock:
out:
data->critical_sequence = max_sequence;
- data->preempt_timestamp = now(cpu);
+ data->preempt_timestamp = ftrace_now(cpu);
tracing_reset(data);
ftrace(tr, data, CALLER_ADDR0, parent_ip, flags);
}
@@ -215,7 +215,7 @@ start_critical_timing(unsigned long ip, unsigned long parent_ip)
atomic_inc(&data->disabled);
data->critical_sequence = max_sequence;
- data->preempt_timestamp = now(cpu);
+ data->preempt_timestamp = ftrace_now(cpu);
data->critical_start = parent_ip ? : ip;
tracing_reset(data);
diff --git a/kernel/trace/trace_sched_switch.c b/kernel/trace/trace_sched_switch.c
index 6c9284103a6..8d656672da9 100644
--- a/kernel/trace/trace_sched_switch.c
+++ b/kernel/trace/trace_sched_switch.c
@@ -61,7 +61,7 @@ static notrace void sched_switch_reset(struct trace_array *tr)
{
int cpu;
- tr->time_start = now(tr->cpu);
+ tr->time_start = ftrace_now(tr->cpu);
for_each_online_cpu(cpu)
tracing_reset(tr->data[cpu]);
diff --git a/kernel/trace/trace_sched_wakeup.c b/kernel/trace/trace_sched_wakeup.c
index 688df965f3f..b7df825c3af 100644
--- a/kernel/trace/trace_sched_wakeup.c
+++ b/kernel/trace/trace_sched_wakeup.c
@@ -92,7 +92,7 @@ wakeup_sched_switch(struct task_struct *prev, struct task_struct *next)
* as long as possible:
*/
T0 = data->preempt_timestamp;
- T1 = now(cpu);
+ T1 = ftrace_now(cpu);
delta = T1-T0;
if (!report_latency(delta))
@@ -191,7 +191,7 @@ wakeup_check_start(struct trace_array *tr, struct task_struct *p,
local_save_flags(flags);
- tr->data[wakeup_cpu]->preempt_timestamp = now(cpu);
+ tr->data[wakeup_cpu]->preempt_timestamp = ftrace_now(cpu);
ftrace(tr, tr->data[wakeup_cpu], CALLER_ADDR1, CALLER_ADDR2, flags);
out_locked: