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ftrace: timestamp syncing, prepare

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rename and uninline now() to ftrace_now().

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 21:20:46 +02:00 committed by Thomas Gleixner
parent 4bf39a9411
commit 750ed1a407
7 changed files with 16 additions and 14 deletions
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4
kernel/trace/ftrace.c
View file

@ -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;

7
kernel/trace/trace.c
View file

@ -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) |

5
kernel/trace/trace.h
View file

@ -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

2
kernel/trace/trace_functions.c
View file

@ -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]);

6
kernel/trace/trace_irqsoff.c
View file

@ -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 @@ check_critical_timing(struct trace_array *tr,
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);

2
kernel/trace/trace_sched_switch.c
View file

@ -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]);

4
kernel/trace/trace_sched_wakeup.c
View file

@ -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: