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Commit 3ed0d21e authored by Stanislav Fomichev's avatar Stanislav Fomichev Committed by Arnaldo Carvalho de Melo
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perf timechart: dynamically determine event fields offset 



Since b000c806 "tracing: Remove the extra 4 bytes of padding in
events" removed padding bytes, perf timechart got out of sync with the
kernel's trace_entry structure.

Convert perf timechart to use dynamic fields offsets (via
perf_evsel__intval) not relying on a hardcoded copy of fields layout
from the kernel.

Signed-off-by: default avatarStanislav Fomichev <stfomichev@yandex-team.ru>
Acked-by: default avatarNamhyung Kim <namhyung@kernel.org>
Cc: Chia-I Wu <olvaffe@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/20131127104459.GB3309@stfomichev-desktop


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 449867e3

tools/perf/builtin-timechart.c

+42 −77
Original line number Diff line number Diff line
@@ -306,50 +306,10 @@ static int process_exit_event(struct perf_tool *tool __maybe_unused, 
	return 0;

}



struct trace_entry {

	unsigned short		type;

	unsigned char		flags;

	unsigned char		preempt_count;

	int			pid;

	int			lock_depth;

};



#ifdef SUPPORT_OLD_POWER_EVENTS

static int use_old_power_events;

struct power_entry_old {

	struct trace_entry te;

	u64	type;

	u64	value;

	u64	cpu_id;

};

#endif



struct power_processor_entry {

	struct trace_entry te;

	u32	state;

	u32	cpu_id;

};



#define TASK_COMM_LEN 16

struct wakeup_entry {

	struct trace_entry te;

	char comm[TASK_COMM_LEN];

	int   pid;

	int   prio;

	int   success;

};



struct sched_switch {

	struct trace_entry te;

	char prev_comm[TASK_COMM_LEN];

	int  prev_pid;

	int  prev_prio;

	long prev_state; /* Arjan weeps. */

	char next_comm[TASK_COMM_LEN];

	int  next_pid;

	int  next_prio;

};



static void c_state_start(int cpu, u64 timestamp, int state)

{

	cpus_cstate_start_times[cpu] = timestamp;
@@ -409,25 +369,23 @@ static void p_state_change(int cpu, u64 timestamp, u64 new_freq) 
			turbo_frequency = max_freq;

}



static void

sched_wakeup(int cpu, u64 timestamp, int pid, struct trace_entry *te,

	     const char *backtrace)

static void sched_wakeup(int cpu, u64 timestamp, int waker, int wakee,

			 u8 flags, const char *backtrace)

{

	struct per_pid *p;

	struct wakeup_entry *wake = (void *)te;

	struct wake_event *we = zalloc(sizeof(*we));



	if (!we)

		return;



	we->time = timestamp;

	we->waker = pid;

	we->waker = waker;

	we->backtrace = backtrace;



	if ((te->flags & TRACE_FLAG_HARDIRQ) || (te->flags & TRACE_FLAG_SOFTIRQ))

	if ((flags & TRACE_FLAG_HARDIRQ) || (flags & TRACE_FLAG_SOFTIRQ))

		we->waker = -1;



	we->wakee = wake->pid;

	we->wakee = wakee;

	we->next = wake_events;

	wake_events = we;

	p = find_create_pid(we->wakee);
@@ -444,24 +402,22 @@ sched_wakeup(int cpu, u64 timestamp, int pid, struct trace_entry *te, 
	}

}



static void sched_switch(int cpu, u64 timestamp, struct trace_entry *te,

			 const char *backtrace)

static void sched_switch(int cpu, u64 timestamp, int prev_pid, int next_pid,

			 u64 prev_state, const char *backtrace)

{

	struct per_pid *p = NULL, *prev_p;

	struct sched_switch *sw = (void *)te;



	prev_p = find_create_pid(prev_pid);



	prev_p = find_create_pid(sw->prev_pid);



	p = find_create_pid(sw->next_pid);

	p = find_create_pid(next_pid);



	if (prev_p->current && prev_p->current->state != TYPE_NONE)

		pid_put_sample(sw->prev_pid, TYPE_RUNNING, cpu,

		pid_put_sample(prev_pid, TYPE_RUNNING, cpu,

			       prev_p->current->state_since, timestamp,

			       backtrace);

	if (p && p->current) {

		if (p->current->state != TYPE_NONE)

			pid_put_sample(sw->next_pid, p->current->state, cpu,

			pid_put_sample(next_pid, p->current->state, cpu,

				       p->current->state_since, timestamp,

				       backtrace);
@@ -472,9 +428,9 @@ static void sched_switch(int cpu, u64 timestamp, struct trace_entry *te, 
	if (prev_p->current) {

		prev_p->current->state = TYPE_NONE;

		prev_p->current->state_since = timestamp;

		if (sw->prev_state & 2)

		if (prev_state & 2)

			prev_p->current->state = TYPE_BLOCKED;

		if (sw->prev_state == 0)

		if (prev_state == 0)

			prev_p->current->state = TYPE_WAITING;

	}

}
@@ -586,61 +542,69 @@ static int process_sample_event(struct perf_tool *tool __maybe_unused, 
}



static int

process_sample_cpu_idle(struct perf_evsel *evsel __maybe_unused,

process_sample_cpu_idle(struct perf_evsel *evsel,

			struct perf_sample *sample,

			const char *backtrace __maybe_unused)

{

	struct power_processor_entry *ppe = sample->raw_data;

	u32 state = perf_evsel__intval(evsel, sample, "state");

	u32 cpu_id = perf_evsel__intval(evsel, sample, "cpu_id");



	if (ppe->state == (u32) PWR_EVENT_EXIT)

		c_state_end(ppe->cpu_id, sample->time);

	if (state == (u32)PWR_EVENT_EXIT)

		c_state_end(cpu_id, sample->time);

	else

		c_state_start(ppe->cpu_id, sample->time, ppe->state);

		c_state_start(cpu_id, sample->time, state);

	return 0;

}



static int

process_sample_cpu_frequency(struct perf_evsel *evsel __maybe_unused,

process_sample_cpu_frequency(struct perf_evsel *evsel,

			     struct perf_sample *sample,

			     const char *backtrace __maybe_unused)

{

	struct power_processor_entry *ppe = sample->raw_data;

	u32 state = perf_evsel__intval(evsel, sample, "state");

	u32 cpu_id = perf_evsel__intval(evsel, sample, "cpu_id");



	p_state_change(ppe->cpu_id, sample->time, ppe->state);

	p_state_change(cpu_id, sample->time, state);

	return 0;

}



static int

process_sample_sched_wakeup(struct perf_evsel *evsel __maybe_unused,

process_sample_sched_wakeup(struct perf_evsel *evsel,

			    struct perf_sample *sample,

			    const char *backtrace)

{

	struct trace_entry *te = sample->raw_data;

	u8 flags = perf_evsel__intval(evsel, sample, "common_flags");

	int waker = perf_evsel__intval(evsel, sample, "common_pid");

	int wakee = perf_evsel__intval(evsel, sample, "pid");



	sched_wakeup(sample->cpu, sample->time, sample->pid, te, backtrace);

	sched_wakeup(sample->cpu, sample->time, waker, wakee, flags, backtrace);

	return 0;

}



static int

process_sample_sched_switch(struct perf_evsel *evsel __maybe_unused,

process_sample_sched_switch(struct perf_evsel *evsel,

			    struct perf_sample *sample,

			    const char *backtrace)

{

	struct trace_entry *te = sample->raw_data;

	int prev_pid = perf_evsel__intval(evsel, sample, "prev_pid");

	int next_pid = perf_evsel__intval(evsel, sample, "next_pid");

	u64 prev_state = perf_evsel__intval(evsel, sample, "prev_state");



	sched_switch(sample->cpu, sample->time, te, backtrace);

	sched_switch(sample->cpu, sample->time, prev_pid, next_pid, prev_state,

		     backtrace);

	return 0;

}



#ifdef SUPPORT_OLD_POWER_EVENTS

static int

process_sample_power_start(struct perf_evsel *evsel __maybe_unused,

process_sample_power_start(struct perf_evsel *evsel,

			   struct perf_sample *sample,

			   const char *backtrace __maybe_unused)

{

	struct power_entry_old *peo = sample->raw_data;

	u64 cpu_id = perf_evsel__intval(evsel, sample, "cpu_id");

	u64 value = perf_evsel__intval(evsel, sample, "value");



	c_state_start(peo->cpu_id, sample->time, peo->value);

	c_state_start(cpu_id, sample->time, value);

	return 0;

}
@@ -654,13 +618,14 @@ process_sample_power_end(struct perf_evsel *evsel __maybe_unused, 
}



static int

process_sample_power_frequency(struct perf_evsel *evsel __maybe_unused,

process_sample_power_frequency(struct perf_evsel *evsel,

			       struct perf_sample *sample,

			       const char *backtrace __maybe_unused)

{

	struct power_entry_old *peo = sample->raw_data;

	u64 cpu_id = perf_evsel__intval(evsel, sample, "cpu_id");

	u64 value = perf_evsel__intval(evsel, sample, "value");



	p_state_change(peo->cpu_id, sample->time, peo->value);

	p_state_change(cpu_id, sample->time, value);

	return 0;

}

#endif /* SUPPORT_OLD_POWER_EVENTS */