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ftrace: introduce tracing_reset_online_cpus() helper

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Impact: cleanup

This patch factors out common code from multiple tracers into a
tracing_reset_online_cpus() function and converts the tracers to use it.

Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Pekka J Enberg 2008-12-19 12:08:39 +02:00 committed by Ingo Molnar
parent 30cd324e97
commit 213cc06079
8 changed files with 20 additions and 63 deletions
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10
kernel/trace/trace.c
View File

@ -679,6 +679,16 @@ void tracing_reset(struct trace_array *tr, int cpu)
ftrace_enable_cpu();
}
void tracing_reset_online_cpus(struct trace_array *tr)
{
int cpu;
tr->time_start = ftrace_now(tr->cpu);
for_each_online_cpu(cpu)
tracing_reset(tr, cpu);
}
#define SAVED_CMDLINES 128
static unsigned map_pid_to_cmdline[PID_MAX_DEFAULT+1];
static unsigned map_cmdline_to_pid[SAVED_CMDLINES];

1
kernel/trace/trace.h
View File

@ -374,6 +374,7 @@ struct trace_iterator {
int tracing_is_enabled(void);
void trace_wake_up(void);
void tracing_reset(struct trace_array *tr, int cpu);
void tracing_reset_online_cpus(struct trace_array *tr);
int tracing_open_generic(struct inode *inode, struct file *filp);
struct dentry *tracing_init_dentry(void);
void init_tracer_sysprof_debugfs(struct dentry *d_tracer);

12
kernel/trace/trace_boot.c
View File

@ -37,16 +37,6 @@ void disable_boot_trace(void)
tracing_stop_sched_switch_record();
}
static void reset_boot_trace(struct trace_array *tr)
{
int cpu;
tr->time_start = ftrace_now(tr->cpu);
for_each_online_cpu(cpu)
tracing_reset(tr, cpu);
}
static int boot_trace_init(struct trace_array *tr)
{
int cpu;
@ -130,7 +120,7 @@ struct tracer boot_tracer __read_mostly =
{
.name = "initcall",
.init = boot_trace_init,
.reset = reset_boot_trace,
.reset = tracing_reset_online_cpus,
.print_line = initcall_print_line,
};

14
kernel/trace/trace_functions.c
View File

@ -16,20 +16,10 @@
#include "trace.h"
static void function_reset(struct trace_array *tr)
{
int cpu;
tr->time_start = ftrace_now(tr->cpu);
for_each_online_cpu(cpu)
tracing_reset(tr, cpu);
}
static void start_function_trace(struct trace_array *tr)
{
tr->cpu = get_cpu();
function_reset(tr);
tracing_reset_online_cpus(tr);
put_cpu();
tracing_start_cmdline_record();
@ -55,7 +45,7 @@ static void function_trace_reset(struct trace_array *tr)
static void function_trace_start(struct trace_array *tr)
{
function_reset(tr);
tracing_reset_online_cpus(tr);
}
static struct tracer function_trace __read_mostly =

14
kernel/trace/trace_hw_branches.c
View File

@ -25,16 +25,6 @@ static DEFINE_PER_CPU(unsigned char[SIZEOF_BTS], buffer);
#define this_buffer per_cpu(buffer, smp_processor_id())
static void bts_trace_reset(struct trace_array *tr)
{
int cpu;
tr->time_start = ftrace_now(tr->cpu);
for_each_online_cpu(cpu)
tracing_reset(tr, cpu);
}
static void bts_trace_start_cpu(void *arg)
{
if (this_tracer)
@ -54,7 +44,7 @@ static void bts_trace_start(struct trace_array *tr)
{
int cpu;
bts_trace_reset(tr);
tracing_reset_online_cpus(tr);
for_each_cpu_mask(cpu, cpu_possible_map)
smp_call_function_single(cpu, bts_trace_start_cpu, NULL, 1);
@ -78,7 +68,7 @@ static void bts_trace_stop(struct trace_array *tr)
static int bts_trace_init(struct trace_array *tr)
{
bts_trace_reset(tr);
tracing_reset_online_cpus(tr);
bts_trace_start(tr);
return 0;

6
kernel/trace/trace_mmiotrace.c
View File

@ -22,14 +22,10 @@ static unsigned long prev_overruns;
static void mmio_reset_data(struct trace_array *tr)
{
int cpu;
overrun_detected = false;
prev_overruns = 0;
tr->time_start = ftrace_now(tr->cpu);
for_each_online_cpu(cpu)
tracing_reset(tr, cpu);
tracing_reset_online_cpus(tr);
}
static int mmio_trace_init(struct trace_array *tr)

14
kernel/trace/trace_sched_switch.c
View File

@ -72,16 +72,6 @@ probe_sched_wakeup(struct rq *__rq, struct task_struct *wakee)
local_irq_restore(flags);
}
static void sched_switch_reset(struct trace_array *tr)
{
int cpu;
tr->time_start = ftrace_now(tr->cpu);
for_each_online_cpu(cpu)
tracing_reset(tr, cpu);
}
static int tracing_sched_register(void)
{
int ret;
@ -197,7 +187,7 @@ void tracing_sched_switch_assign_trace(struct trace_array *tr)
static void start_sched_trace(struct trace_array *tr)
{
sched_switch_reset(tr);
tracing_reset_online_cpus(tr);
tracing_start_sched_switch_record();
}
@ -221,7 +211,7 @@ static void sched_switch_trace_reset(struct trace_array *tr)
static void sched_switch_trace_start(struct trace_array *tr)
{
sched_switch_reset(tr);
tracing_reset_online_cpus(tr);
tracing_start_sched_switch();
}

12
kernel/trace/trace_sysprof.c
View File

@ -234,20 +234,10 @@ static void stop_stack_timers(void)
stop_stack_timer(cpu);
}
static void stack_reset(struct trace_array *tr)
{
int cpu;
tr->time_start = ftrace_now(tr->cpu);
for_each_online_cpu(cpu)
tracing_reset(tr, cpu);
}
static void start_stack_trace(struct trace_array *tr)
{
mutex_lock(&sample_timer_lock);
stack_reset(tr);
tracing_reset_online_cpus(tr);
start_stack_timers();
tracer_enabled = 1;
mutex_unlock(&sample_timer_lock);