mirror of https://gitee.com/openkylin/linux.git
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>
This commit is contained in:
Mathieu Desnoyers
Ingo Molnar
parent
0a16b60758
commit
b07c3f193a
|
|
@ -9,8 +9,8 @@
|
|||
#include <linux/debugfs.h>
|
||||
#include <linux/kallsyms.h>
|
||||
#include <linux/uaccess.h>
|
||||
#include <linux/marker.h>
|
||||
#include <linux/ftrace.h>
|
||||
#include <trace/sched.h>
|
||||
|
||||
#include "trace.h"
|
||||
|
||||
|
|
@ -19,16 +19,17 @@ static int __read_mostly tracer_enabled;
|
|||
static atomic_t sched_ref;
|
||||
|
||||
static void
|
||||
sched_switch_func(void *private, void *__rq, struct task_struct *prev,
|
||||
probe_sched_switch(struct rq *__rq, struct task_struct *prev,
|
||||
struct task_struct *next)
|
||||
{
|
||||
struct trace_array **ptr = private;
|
||||
struct trace_array *tr = *ptr;
|
||||
struct trace_array_cpu *data;
|
||||
unsigned long flags;
|
||||
long disabled;
|
||||
int cpu;
|
||||
|
||||
if (!atomic_read(&sched_ref))
|
||||
return;
|
||||
|
||||
tracing_record_cmdline(prev);
|
||||
tracing_record_cmdline(next);
|
||||
|
||||
|
|
@ -37,95 +38,42 @@ sched_switch_func(void *private, void *__rq, struct task_struct *prev,
|
|||
|
||||
local_irq_save(flags);
|
||||
cpu = raw_smp_processor_id();
|
||||
data = tr->data[cpu];
|
||||
data = ctx_trace->data[cpu];
|
||||
disabled = atomic_inc_return(&data->disabled);
|
||||
|
||||
if (likely(disabled == 1))
|
||||
tracing_sched_switch_trace(tr, data, prev, next, flags);
|
||||
tracing_sched_switch_trace(ctx_trace, data, prev, next, flags);
|
||||
|
||||
atomic_dec(&data->disabled);
|
||||
local_irq_restore(flags);
|
||||
}
|
||||
|
||||
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;
|
||||
|
||||
if (!atomic_read(&sched_ref))
|
||||
return;
|
||||
|
||||
/* 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));
|
||||
|
||||
/*
|
||||
* If tracer_switch_func only points to the local
|
||||
* switch func, it still needs the ptr passed to it.
|
||||
*/
|
||||
sched_switch_func(probe_data, __rq, prev, next);
|
||||
}
|
||||
|
||||
static void
|
||||
wakeup_func(void *private, void *__rq, struct task_struct *wakee, struct
|
||||
task_struct *curr)
|
||||
probe_sched_wakeup(struct rq *__rq, struct task_struct *wakee)
|
||||
{
|
||||
struct trace_array **ptr = private;
|
||||
struct trace_array *tr = *ptr;
|
||||
struct trace_array_cpu *data;
|
||||
unsigned long flags;
|
||||
long disabled;
|
||||
int cpu;
|
||||
|
||||
if (!tracer_enabled)
|
||||
if (!likely(tracer_enabled))
|
||||
return;
|
||||
|
||||
tracing_record_cmdline(curr);
|
||||
tracing_record_cmdline(current);
|
||||
|
||||
local_irq_save(flags);
|
||||
cpu = raw_smp_processor_id();
|
||||
data = tr->data[cpu];
|
||||
data = ctx_trace->data[cpu];
|
||||
disabled = atomic_inc_return(&data->disabled);
|
||||
|
||||
if (likely(disabled == 1))
|
||||
tracing_sched_wakeup_trace(tr, data, wakee, curr, flags);
|
||||
tracing_sched_wakeup_trace(ctx_trace, data, wakee, current,
|
||||
flags);
|
||||
|
||||
atomic_dec(&data->disabled);
|
||||
local_irq_restore(flags);
|
||||
}
|
||||
|
||||
static notrace void
|
||||
wake_up_callback(void *probe_data, void *call_data,
|
||||
const char *format, va_list *args)
|
||||
{
|
||||
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_func(probe_data, __rq, task, curr);
|
||||
}
|
||||
|
||||
static void sched_switch_reset(struct trace_array *tr)
|
||||
{
|
||||
int cpu;
|
||||
|
|
@ -140,60 +88,40 @@ static int tracing_sched_register(void)
|
|||
{
|
||||
int ret;
|
||||
|
||||
ret = marker_probe_register("kernel_sched_wakeup",
|
||||
"pid %d state %ld ## rq %p task %p rq->curr %p",
|
||||
wake_up_callback,
|
||||
&ctx_trace);
|
||||
ret = register_trace_sched_wakeup(probe_sched_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;
|
||||
}
|
||||
|
||||
ret = marker_probe_register("kernel_sched_wakeup_new",
|
||||
"pid %d state %ld ## rq %p task %p rq->curr %p",
|
||||
wake_up_callback,
|
||||
&ctx_trace);
|
||||
ret = register_trace_sched_wakeup_new(probe_sched_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,
|
||||
&ctx_trace);
|
||||
ret = register_trace_sched_switch(probe_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;
|
||||
}
|
||||
|
||||
return ret;
|
||||
fail_deprobe_wake_new:
|
||||
marker_probe_unregister("kernel_sched_wakeup_new",
|
||||
wake_up_callback,
|
||||
&ctx_trace);
|
||||
unregister_trace_sched_wakeup_new(probe_sched_wakeup);
|
||||
fail_deprobe:
|
||||
marker_probe_unregister("kernel_sched_wakeup",
|
||||
wake_up_callback,
|
||||
&ctx_trace);
|
||||
unregister_trace_sched_wakeup(probe_sched_wakeup);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void tracing_sched_unregister(void)
|
||||
{
|
||||
marker_probe_unregister("kernel_sched_schedule",
|
||||
sched_switch_callback,
|
||||
&ctx_trace);
|
||||
marker_probe_unregister("kernel_sched_wakeup_new",
|
||||
wake_up_callback,
|
||||
&ctx_trace);
|
||||
marker_probe_unregister("kernel_sched_wakeup",
|
||||
wake_up_callback,
|
||||
&ctx_trace);
|
||||
unregister_trace_sched_switch(probe_sched_switch);
|
||||
unregister_trace_sched_wakeup_new(probe_sched_wakeup);
|
||||
unregister_trace_sched_wakeup(probe_sched_wakeup);
|
||||
}
|
||||
|
||||
static void tracing_start_sched_switch(void)
|
||||
|
|
|
|||
|
|
@ -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(!rt_task(p)) ||
|
||||
p->prio >= wakeup_prio ||
|
||||
p->prio >= curr->prio)
|
||||
if (likely(!tracer_enabled))
|
||||
return;
|
||||
|
||||
disabled = atomic_inc_return(&tr->data[cpu]->disabled);
|
||||
tracing_record_cmdline(p);
|
||||
tracing_record_cmdline(current);
|
||||
|
||||
if (likely(!rt_task(p)) ||
|
||||
p->prio >= wakeup_prio ||
|
||||
p->prio >= current->prio)
|
||||
return;
|
||||
|
||||
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)
|
||||
|
|
|
|||
Loading…
Reference in New Issue