Commit bac524d3 authored by Peter Zijlstra's avatar Peter Zijlstra Committed by Thomas Gleixner
Browse files

ftrace: trace next state 



Signed-off-by: default avatarPeter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent 88a4216c

kernel/trace/trace.c

+25 −10
Original line number Diff line number Diff line
@@ -736,6 +736,7 @@ tracing_sched_switch_trace(struct trace_array *tr, 
	entry->ctx.prev_state	= prev->state;

	entry->ctx.next_pid	= next->pid;

	entry->ctx.next_prio	= next->prio;

	entry->ctx.next_state	= next->state;

	__trace_stack(tr, data, flags, 4);

	spin_unlock_irqrestore(&data->lock, irq_flags);

}
@@ -759,6 +760,7 @@ tracing_sched_wakeup_trace(struct trace_array *tr, 
	entry->ctx.prev_state	= curr->state;

	entry->ctx.next_pid	= wakee->pid;

	entry->ctx.next_prio	= wakee->prio;

	entry->ctx.next_state	= wakee->state;

	__trace_stack(tr, data, flags, 5);

	spin_unlock_irqrestore(&data->lock, irq_flags);
@@ -1207,7 +1209,7 @@ print_lat_fmt(struct trace_iterator *iter, unsigned int trace_idx, int cpu) 
	unsigned long abs_usecs;

	unsigned long rel_usecs;

	char *comm;

	int S;

	int S, T;

	int i;



	if (!next_entry)
@@ -1241,14 +1243,17 @@ print_lat_fmt(struct trace_iterator *iter, unsigned int trace_idx, int cpu) 
	case TRACE_WAKE:

		S = entry->ctx.prev_state < sizeof(state_to_char) ?

			state_to_char[entry->ctx.prev_state] : 'X';

		T = entry->ctx.next_state < sizeof(state_to_char) ?

			state_to_char[entry->ctx.next_state] : 'X';



		comm = trace_find_cmdline(entry->ctx.next_pid);

		trace_seq_printf(s, " %5d:%3d:%c %s %5d:%3d %s\n",

		trace_seq_printf(s, " %5d:%3d:%c %s %5d:%3d:%c %s\n",

				 entry->ctx.prev_pid,

				 entry->ctx.prev_prio,

				 S, entry->type == TRACE_CTX ? "==>" : "  +",

				 entry->ctx.next_pid,

				 entry->ctx.next_prio,

				 comm);

				 T, comm);

		break;

	case TRACE_SPECIAL:

		trace_seq_printf(s, "# %ld %ld %ld\n",
@@ -1280,7 +1285,7 @@ static int print_trace_fmt(struct trace_iterator *iter) 
	unsigned long secs;

	char *comm;

	int ret;

	int S;

	int S, T;

	int i;



	entry = iter->ent;
@@ -1324,13 +1329,16 @@ static int print_trace_fmt(struct trace_iterator *iter) 
	case TRACE_WAKE:

		S = entry->ctx.prev_state < sizeof(state_to_char) ?

			state_to_char[entry->ctx.prev_state] : 'X';

		ret = trace_seq_printf(s, " %5d:%3d:%c %s %5d:%3d\n",

		T = entry->ctx.next_state < sizeof(state_to_char) ?

			state_to_char[entry->ctx.next_state] : 'X';

		ret = trace_seq_printf(s, " %5d:%3d:%c %s %5d:%3d:%c\n",

				       entry->ctx.prev_pid,

				       entry->ctx.prev_prio,

				       S,

				       entry->type == TRACE_CTX ? "==>" : "  +",

				       entry->ctx.next_pid,

				       entry->ctx.next_prio);

				       entry->ctx.next_prio,

				       T);

		if (!ret)

			return 0;

		break;
@@ -1367,7 +1375,7 @@ static int print_raw_fmt(struct trace_iterator *iter) 
	struct trace_seq *s = &iter->seq;

	struct trace_entry *entry;

	int ret;

	int S;

	int S, T;



	entry = iter->ent;
@@ -1387,14 +1395,17 @@ static int print_raw_fmt(struct trace_iterator *iter) 
	case TRACE_WAKE:

		S = entry->ctx.prev_state < sizeof(state_to_char) ?

			state_to_char[entry->ctx.prev_state] : 'X';

		T = entry->ctx.next_state < sizeof(state_to_char) ?

			state_to_char[entry->ctx.next_state] : 'X';

		if (entry->type == TRACE_WAKE)

			S = '+';

		ret = trace_seq_printf(s, "%d %d %c %d %d\n",

		ret = trace_seq_printf(s, "%d %d %c %d %d %c\n",

				       entry->ctx.prev_pid,

				       entry->ctx.prev_prio,

				       S,

				       entry->ctx.next_pid,

				       entry->ctx.next_prio);

				       entry->ctx.next_prio,

				       T);

		if (!ret)

			return 0;

		break;
@@ -1428,7 +1439,7 @@ static int print_hex_fmt(struct trace_iterator *iter) 
	struct trace_seq *s = &iter->seq;

	unsigned char newline = '\n';

	struct trace_entry *entry;

	int S;

	int S, T;



	entry = iter->ent;
@@ -1445,6 +1456,8 @@ static int print_hex_fmt(struct trace_iterator *iter) 
	case TRACE_WAKE:

		S = entry->ctx.prev_state < sizeof(state_to_char) ?

			state_to_char[entry->ctx.prev_state] : 'X';

		T = entry->ctx.next_state < sizeof(state_to_char) ?

			state_to_char[entry->ctx.next_state] : 'X';

		if (entry->type == TRACE_WAKE)

			S = '+';

		SEQ_PUT_HEX_FIELD_RET(s, entry->ctx.prev_pid);
@@ -1453,6 +1466,7 @@ static int print_hex_fmt(struct trace_iterator *iter) 
		SEQ_PUT_HEX_FIELD_RET(s, entry->ctx.next_pid);

		SEQ_PUT_HEX_FIELD_RET(s, entry->ctx.next_prio);

		SEQ_PUT_HEX_FIELD_RET(s, entry->fn.parent_ip);

		SEQ_PUT_HEX_FIELD_RET(s, T);

		break;

	case TRACE_SPECIAL:

	case TRACE_STACK:
@@ -1488,6 +1502,7 @@ static int print_bin_fmt(struct trace_iterator *iter) 
		SEQ_PUT_FIELD_RET(s, entry->ctx.prev_state);

		SEQ_PUT_FIELD_RET(s, entry->ctx.next_pid);

		SEQ_PUT_FIELD_RET(s, entry->ctx.next_prio);

		SEQ_PUT_FIELD_RET(s, entry->ctx.next_state);

		break;

	case TRACE_SPECIAL:

	case TRACE_STACK:

kernel/trace/trace.h

+1 −0
Original line number Diff line number Diff line
@@ -23,6 +23,7 @@ struct ctx_switch_entry { 
	unsigned char		prev_state;

	unsigned int		next_pid;

	unsigned char		next_prio;

	unsigned char		next_state;

};



/*