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authorMathieu Desnoyers <mathieu.desnoyers@polymtl.ca>2008-07-18 12:16:17 -0400
committerIngo Molnar <mingo@elte.hu>2008-10-14 10:32:26 +0200
commitb07c3f193a8074aa4afe43cfa8ae38ec4c7ccfa9 (patch)
tree7d2b1d9efc5a8e24cb07c8d7f0b3e056fec8f150 /kernel/trace/trace_sched_wakeup.c
parent0a16b6075843325dc402edf80c1662838b929aff (diff)
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ftrace: port to tracepoints
Porting the trace_mark() used by ftrace to tracepoints. (cleanup) Changelog : - Change error messages : marker -> tracepoint [ mingo@elte.hu: conflict resolutions ] Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Acked-by: 'Peter Zijlstra' <peterz@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/trace/trace_sched_wakeup.c')
-rw-r--r--kernel/trace/trace_sched_wakeup.c135
1 files changed, 34 insertions, 101 deletions
diff --git a/kernel/trace/trace_sched_wakeup.c b/kernel/trace/trace_sched_wakeup.c
index e303ccb62cd..08206b4e29c 100644
--- a/kernel/trace/trace_sched_wakeup.c
+++ b/kernel/trace/trace_sched_wakeup.c
@@ -15,7 +15,7 @@
#include <linux/kallsyms.h>
#include <linux/uaccess.h>
#include <linux/ftrace.h>
-#include <linux/marker.h>
+#include <trace/sched.h>
#include "trace.h"
@@ -112,18 +112,18 @@ static int report_latency(cycle_t delta)
}
static void notrace
-wakeup_sched_switch(void *private, void *rq, struct task_struct *prev,
+probe_wakeup_sched_switch(struct rq *rq, struct task_struct *prev,
struct task_struct *next)
{
unsigned long latency = 0, t0 = 0, t1 = 0;
- struct trace_array **ptr = private;
- struct trace_array *tr = *ptr;
struct trace_array_cpu *data;
cycle_t T0, T1, delta;
unsigned long flags;
long disabled;
int cpu;
+ tracing_record_cmdline(prev);
+
if (unlikely(!tracer_enabled))
return;
@@ -140,11 +140,11 @@ wakeup_sched_switch(void *private, void *rq, struct task_struct *prev,
return;
/* The task we are waiting for is waking up */
- data = tr->data[wakeup_cpu];
+ data = wakeup_trace->data[wakeup_cpu];
/* disable local data, not wakeup_cpu data */
cpu = raw_smp_processor_id();
- disabled = atomic_inc_return(&tr->data[cpu]->disabled);
+ disabled = atomic_inc_return(&wakeup_trace->data[cpu]->disabled);
if (likely(disabled != 1))
goto out;
@@ -155,7 +155,7 @@ wakeup_sched_switch(void *private, void *rq, struct task_struct *prev,
if (unlikely(!tracer_enabled || next != wakeup_task))
goto out_unlock;
- trace_function(tr, data, CALLER_ADDR1, CALLER_ADDR2, flags);
+ trace_function(wakeup_trace, data, CALLER_ADDR1, CALLER_ADDR2, flags);
/*
* usecs conversion is slow so we try to delay the conversion
@@ -174,39 +174,14 @@ wakeup_sched_switch(void *private, void *rq, struct task_struct *prev,
t0 = nsecs_to_usecs(T0);
t1 = nsecs_to_usecs(T1);
- update_max_tr(tr, wakeup_task, wakeup_cpu);
+ update_max_tr(wakeup_trace, wakeup_task, wakeup_cpu);
out_unlock:
- __wakeup_reset(tr);
+ __wakeup_reset(wakeup_trace);
__raw_spin_unlock(&wakeup_lock);
local_irq_restore(flags);
out:
- atomic_dec(&tr->data[cpu]->disabled);
-}
-
-static notrace void
-sched_switch_callback(void *probe_data, void *call_data,
- const char *format, va_list *args)
-{
- struct task_struct *prev;
- struct task_struct *next;
- struct rq *__rq;
-
- /* skip prev_pid %d next_pid %d prev_state %ld */
- (void)va_arg(*args, int);
- (void)va_arg(*args, int);
- (void)va_arg(*args, long);
- __rq = va_arg(*args, typeof(__rq));
- prev = va_arg(*args, typeof(prev));
- next = va_arg(*args, typeof(next));
-
- tracing_record_cmdline(prev);
-
- /*
- * If tracer_switch_func only points to the local
- * switch func, it still needs the ptr passed to it.
- */
- wakeup_sched_switch(probe_data, __rq, prev, next);
+ atomic_dec(&wakeup_trace->data[cpu]->disabled);
}
static void __wakeup_reset(struct trace_array *tr)
@@ -240,19 +215,24 @@ static void wakeup_reset(struct trace_array *tr)
}
static void
-wakeup_check_start(struct trace_array *tr, struct task_struct *p,
- struct task_struct *curr)
+probe_wakeup(struct rq *rq, struct task_struct *p)
{
int cpu = smp_processor_id();
unsigned long flags;
long disabled;
+ if (likely(!tracer_enabled))
+ return;
+
+ tracing_record_cmdline(p);
+ tracing_record_cmdline(current);
+
if (likely(!rt_task(p)) ||
p->prio >= wakeup_prio ||
- p->prio >= curr->prio)
+ p->prio >= current->prio)
return;
- disabled = atomic_inc_return(&tr->data[cpu]->disabled);
+ disabled = atomic_inc_return(&wakeup_trace->data[cpu]->disabled);
if (unlikely(disabled != 1))
goto out;
@@ -264,7 +244,7 @@ wakeup_check_start(struct trace_array *tr, struct task_struct *p,
goto out_locked;
/* reset the trace */
- __wakeup_reset(tr);
+ __wakeup_reset(wakeup_trace);
wakeup_cpu = task_cpu(p);
wakeup_prio = p->prio;
@@ -274,74 +254,37 @@ wakeup_check_start(struct trace_array *tr, struct task_struct *p,
local_save_flags(flags);
- tr->data[wakeup_cpu]->preempt_timestamp = ftrace_now(cpu);
- trace_function(tr, tr->data[wakeup_cpu],
+ wakeup_trace->data[wakeup_cpu]->preempt_timestamp = ftrace_now(cpu);
+ trace_function(wakeup_trace, wakeup_trace->data[wakeup_cpu],
CALLER_ADDR1, CALLER_ADDR2, flags);
out_locked:
__raw_spin_unlock(&wakeup_lock);
out:
- atomic_dec(&tr->data[cpu]->disabled);
-}
-
-static notrace void
-wake_up_callback(void *probe_data, void *call_data,
- const char *format, va_list *args)
-{
- struct trace_array **ptr = probe_data;
- struct trace_array *tr = *ptr;
- struct task_struct *curr;
- struct task_struct *task;
- struct rq *__rq;
-
- if (likely(!tracer_enabled))
- return;
-
- /* Skip pid %d state %ld */
- (void)va_arg(*args, int);
- (void)va_arg(*args, long);
- /* now get the meat: "rq %p task %p rq->curr %p" */
- __rq = va_arg(*args, typeof(__rq));
- task = va_arg(*args, typeof(task));
- curr = va_arg(*args, typeof(curr));
-
- tracing_record_cmdline(task);
- tracing_record_cmdline(curr);
-
- wakeup_check_start(tr, task, curr);
+ atomic_dec(&wakeup_trace->data[cpu]->disabled);
}
static void start_wakeup_tracer(struct trace_array *tr)
{
int ret;
- ret = marker_probe_register("kernel_sched_wakeup",
- "pid %d state %ld ## rq %p task %p rq->curr %p",
- wake_up_callback,
- &wakeup_trace);
+ ret = register_trace_sched_wakeup(probe_wakeup);
if (ret) {
- pr_info("wakeup trace: Couldn't add marker"
+ pr_info("wakeup trace: Couldn't activate tracepoint"
" probe to kernel_sched_wakeup\n");
return;
}
- ret = marker_probe_register("kernel_sched_wakeup_new",
- "pid %d state %ld ## rq %p task %p rq->curr %p",
- wake_up_callback,
- &wakeup_trace);
+ ret = register_trace_sched_wakeup_new(probe_wakeup);
if (ret) {
- pr_info("wakeup trace: Couldn't add marker"
+ pr_info("wakeup trace: Couldn't activate tracepoint"
" probe to kernel_sched_wakeup_new\n");
goto fail_deprobe;
}
- ret = marker_probe_register("kernel_sched_schedule",
- "prev_pid %d next_pid %d prev_state %ld "
- "## rq %p prev %p next %p",
- sched_switch_callback,
- &wakeup_trace);
+ ret = register_trace_sched_switch(probe_wakeup_sched_switch);
if (ret) {
- pr_info("sched trace: Couldn't add marker"
+ pr_info("sched trace: Couldn't activate tracepoint"
" probe to kernel_sched_schedule\n");
goto fail_deprobe_wake_new;
}
@@ -363,28 +306,18 @@ static void start_wakeup_tracer(struct trace_array *tr)
return;
fail_deprobe_wake_new:
- marker_probe_unregister("kernel_sched_wakeup_new",
- wake_up_callback,
- &wakeup_trace);
+ unregister_trace_sched_wakeup_new(probe_wakeup);
fail_deprobe:
- marker_probe_unregister("kernel_sched_wakeup",
- wake_up_callback,
- &wakeup_trace);
+ unregister_trace_sched_wakeup(probe_wakeup);
}
static void stop_wakeup_tracer(struct trace_array *tr)
{
tracer_enabled = 0;
unregister_ftrace_function(&trace_ops);
- marker_probe_unregister("kernel_sched_schedule",
- sched_switch_callback,
- &wakeup_trace);
- marker_probe_unregister("kernel_sched_wakeup_new",
- wake_up_callback,
- &wakeup_trace);
- marker_probe_unregister("kernel_sched_wakeup",
- wake_up_callback,
- &wakeup_trace);
+ unregister_trace_sched_switch(probe_wakeup_sched_switch);
+ unregister_trace_sched_wakeup_new(probe_wakeup);
+ unregister_trace_sched_wakeup(probe_wakeup);
}
static void wakeup_tracer_init(struct trace_array *tr)