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Commit 750ed158 authored by Ingo Molnar's avatar Ingo Molnar
Browse files

Merge branch 'tip/perf/core' of... 

Merge branch 'tip/perf/core' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace into perf/core
parents 3f7edb16 7e40798f

kernel/trace/ftrace.c

+2 −2
Original line number Diff line number Diff line
@@ -1638,8 +1638,8 @@ ftrace_failures_open(struct inode *inode, struct file *file) 


	ret = ftrace_avail_open(inode, file);

	if (!ret) {

		m = (struct seq_file *)file->private_data;

		iter = (struct ftrace_iterator *)m->private;

		m = file->private_data;

		iter = m->private;

		iter->flags = FTRACE_ITER_FAILURES;

	}

kernel/trace/trace.c

+1 −1
Original line number Diff line number Diff line
@@ -2196,7 +2196,7 @@ int tracing_open_generic(struct inode *inode, struct file *filp) 


static int tracing_release(struct inode *inode, struct file *file)

{

	struct seq_file *m = (struct seq_file *)file->private_data;

	struct seq_file *m = file->private_data;

	struct trace_iterator *iter;

	int cpu;

kernel/trace/trace.h

+4 −0
Original line number Diff line number Diff line
@@ -343,6 +343,10 @@ void trace_function(struct trace_array *tr, 
		    unsigned long ip,

		    unsigned long parent_ip,

		    unsigned long flags, int pc);

void trace_graph_function(struct trace_array *tr,

		    unsigned long ip,

		    unsigned long parent_ip,

		    unsigned long flags, int pc);

void trace_default_header(struct seq_file *m);

void print_trace_header(struct seq_file *m, struct trace_iterator *iter);

int trace_empty(struct trace_iterator *iter);

kernel/trace/trace_functions_graph.c

+79 −7
Original line number Diff line number Diff line
@@ -262,6 +262,34 @@ int trace_graph_thresh_entry(struct ftrace_graph_ent *trace) 
		return trace_graph_entry(trace);

}



static void

__trace_graph_function(struct trace_array *tr,

		unsigned long ip, unsigned long flags, int pc)

{

	u64 time = trace_clock_local();

	struct ftrace_graph_ent ent = {

		.func  = ip,

		.depth = 0,

	};

	struct ftrace_graph_ret ret = {

		.func     = ip,

		.depth    = 0,

		.calltime = time,

		.rettime  = time,

	};



	__trace_graph_entry(tr, &ent, flags, pc);

	__trace_graph_return(tr, &ret, flags, pc);

}



void

trace_graph_function(struct trace_array *tr,

		unsigned long ip, unsigned long parent_ip,

		unsigned long flags, int pc)

{

	__trace_graph_function(tr, ip, flags, pc);

}



void __trace_graph_return(struct trace_array *tr,

				struct ftrace_graph_ret *trace,

				unsigned long flags,
@@ -888,12 +916,20 @@ check_irq_entry(struct trace_iterator *iter, u32 flags, 
		unsigned long addr, int depth)

{

	int cpu = iter->cpu;

	int *depth_irq;

	struct fgraph_data *data = iter->private;

	int *depth_irq = &(per_cpu_ptr(data->cpu_data, cpu)->depth_irq);



	if (flags & TRACE_GRAPH_PRINT_IRQS)

	/*

	 * If we are either displaying irqs, or we got called as

	 * a graph event and private data does not exist,

	 * then we bypass the irq check.

	 */

	if ((flags & TRACE_GRAPH_PRINT_IRQS) ||

	    (!data))

		return 0;



	depth_irq = &(per_cpu_ptr(data->cpu_data, cpu)->depth_irq);



	/*

	 * We are inside the irq code

	 */
@@ -926,12 +962,20 @@ static int 
check_irq_return(struct trace_iterator *iter, u32 flags, int depth)

{

	int cpu = iter->cpu;

	int *depth_irq;

	struct fgraph_data *data = iter->private;

	int *depth_irq = &(per_cpu_ptr(data->cpu_data, cpu)->depth_irq);



	if (flags & TRACE_GRAPH_PRINT_IRQS)

	/*

	 * If we are either displaying irqs, or we got called as

	 * a graph event and private data does not exist,

	 * then we bypass the irq check.

	 */

	if ((flags & TRACE_GRAPH_PRINT_IRQS) ||

	    (!data))

		return 0;



	depth_irq = &(per_cpu_ptr(data->cpu_data, cpu)->depth_irq);



	/*

	 * We are not inside the irq code.

	 */
@@ -1163,7 +1207,7 @@ print_graph_comment(struct trace_seq *s, struct trace_entry *ent, 




enum print_line_t

print_graph_function_flags(struct trace_iterator *iter, u32 flags)

__print_graph_function_flags(struct trace_iterator *iter, u32 flags)

{

	struct ftrace_graph_ent_entry *field;

	struct fgraph_data *data = iter->private;
@@ -1226,7 +1270,18 @@ print_graph_function_flags(struct trace_iterator *iter, u32 flags) 
static enum print_line_t

print_graph_function(struct trace_iterator *iter)

{

	return print_graph_function_flags(iter, tracer_flags.val);

	return __print_graph_function_flags(iter, tracer_flags.val);

}



enum print_line_t print_graph_function_flags(struct trace_iterator *iter,

					     u32 flags)

{

	if (trace_flags & TRACE_ITER_LATENCY_FMT)

		flags |= TRACE_GRAPH_PRINT_DURATION;

	else

		flags |= TRACE_GRAPH_PRINT_ABS_TIME;



	return __print_graph_function_flags(iter, flags);

}



static enum print_line_t
@@ -1258,7 +1313,7 @@ static void print_lat_header(struct seq_file *s, u32 flags) 
	seq_printf(s, "#%.*s|||| /                     \n", size, spaces);

}



void print_graph_headers_flags(struct seq_file *s, u32 flags)

static void __print_graph_headers_flags(struct seq_file *s, u32 flags)

{

	int lat = trace_flags & TRACE_ITER_LATENCY_FMT;
@@ -1299,6 +1354,23 @@ void print_graph_headers(struct seq_file *s) 
	print_graph_headers_flags(s, tracer_flags.val);

}



void print_graph_headers_flags(struct seq_file *s, u32 flags)

{

	struct trace_iterator *iter = s->private;



	if (trace_flags & TRACE_ITER_LATENCY_FMT) {

		/* print nothing if the buffers are empty */

		if (trace_empty(iter))

			return;



		print_trace_header(s, iter);

		flags |= TRACE_GRAPH_PRINT_DURATION;

	} else

		flags |= TRACE_GRAPH_PRINT_ABS_TIME;



	__print_graph_headers_flags(s, flags);

}



void graph_trace_open(struct trace_iterator *iter)

{

	/* pid and depth on the last trace processed */

kernel/trace/trace_irqsoff.c

+55 −97
Original line number Diff line number Diff line
@@ -87,14 +87,22 @@ static __cacheline_aligned_in_smp unsigned long max_sequence; 


#ifdef CONFIG_FUNCTION_TRACER

/*

 * irqsoff uses its own tracer function to keep the overhead down:

 * Prologue for the preempt and irqs off function tracers.

 *

 * Returns 1 if it is OK to continue, and data->disabled is

 *            incremented.

 *         0 if the trace is to be ignored, and data->disabled

 *            is kept the same.

 *

 * Note, this function is also used outside this ifdef but

 *  inside the #ifdef of the function graph tracer below.

 *  This is OK, since the function graph tracer is

 *  dependent on the function tracer.

 */

static void

irqsoff_tracer_call(unsigned long ip, unsigned long parent_ip)

static int func_prolog_dec(struct trace_array *tr,

			   struct trace_array_cpu **data,

			   unsigned long *flags)

{

	struct trace_array *tr = irqsoff_trace;

	struct trace_array_cpu *data;

	unsigned long flags;

	long disabled;

	int cpu;
@@ -106,17 +114,37 @@ irqsoff_tracer_call(unsigned long ip, unsigned long parent_ip) 
	 */

	cpu = raw_smp_processor_id();

	if (likely(!per_cpu(tracing_cpu, cpu)))

		return;

		return 0;



	local_save_flags(flags);

	local_save_flags(*flags);

	/* slight chance to get a false positive on tracing_cpu */

	if (!irqs_disabled_flags(flags))

		return;

	if (!irqs_disabled_flags(*flags))

		return 0;



	data = tr->data[cpu];

	disabled = atomic_inc_return(&data->disabled);

	*data = tr->data[cpu];

	disabled = atomic_inc_return(&(*data)->disabled);



	if (likely(disabled == 1))

		return 1;



	atomic_dec(&(*data)->disabled);



	return 0;

}



/*

 * irqsoff uses its own tracer function to keep the overhead down:

 */

static void

irqsoff_tracer_call(unsigned long ip, unsigned long parent_ip)

{

	struct trace_array *tr = irqsoff_trace;

	struct trace_array_cpu *data;

	unsigned long flags;



	if (!func_prolog_dec(tr, &data, &flags))

		return;



	trace_function(tr, ip, parent_ip, flags, preempt_count());



	atomic_dec(&data->disabled);
@@ -155,30 +183,16 @@ static int irqsoff_graph_entry(struct ftrace_graph_ent *trace) 
	struct trace_array *tr = irqsoff_trace;

	struct trace_array_cpu *data;

	unsigned long flags;

	long disabled;

	int ret;

	int cpu;

	int pc;



	cpu = raw_smp_processor_id();

	if (likely(!per_cpu(tracing_cpu, cpu)))

	if (!func_prolog_dec(tr, &data, &flags))

		return 0;



	local_save_flags(flags);

	/* slight chance to get a false positive on tracing_cpu */

	if (!irqs_disabled_flags(flags))

		return 0;



	data = tr->data[cpu];

	disabled = atomic_inc_return(&data->disabled);



	if (likely(disabled == 1)) {

	pc = preempt_count();

	ret = __trace_graph_entry(tr, trace, flags, pc);

	} else

		ret = 0;



	atomic_dec(&data->disabled);



	return ret;

}
@@ -187,27 +201,13 @@ static void irqsoff_graph_return(struct ftrace_graph_ret *trace) 
	struct trace_array *tr = irqsoff_trace;

	struct trace_array_cpu *data;

	unsigned long flags;

	long disabled;

	int cpu;

	int pc;



	cpu = raw_smp_processor_id();

	if (likely(!per_cpu(tracing_cpu, cpu)))

	if (!func_prolog_dec(tr, &data, &flags))

		return;



	local_save_flags(flags);

	/* slight chance to get a false positive on tracing_cpu */

	if (!irqs_disabled_flags(flags))

		return;



	data = tr->data[cpu];

	disabled = atomic_inc_return(&data->disabled);



	if (likely(disabled == 1)) {

	pc = preempt_count();

	__trace_graph_return(tr, trace, flags, pc);

	}



	atomic_dec(&data->disabled);

}
@@ -229,75 +229,33 @@ static void irqsoff_trace_close(struct trace_iterator *iter) 


static enum print_line_t irqsoff_print_line(struct trace_iterator *iter)

{

	u32 flags = GRAPH_TRACER_FLAGS;



	if (trace_flags & TRACE_ITER_LATENCY_FMT)

		flags |= TRACE_GRAPH_PRINT_DURATION;

	else

		flags |= TRACE_GRAPH_PRINT_ABS_TIME;



	/*

	 * In graph mode call the graph tracer output function,

	 * otherwise go with the TRACE_FN event handler

	 */

	if (is_graph())

		return print_graph_function_flags(iter, flags);

		return print_graph_function_flags(iter, GRAPH_TRACER_FLAGS);



	return TRACE_TYPE_UNHANDLED;

}



static void irqsoff_print_header(struct seq_file *s)

{

	if (is_graph()) {

		struct trace_iterator *iter = s->private;

		u32 flags = GRAPH_TRACER_FLAGS;



		if (trace_flags & TRACE_ITER_LATENCY_FMT) {

			/* print nothing if the buffers are empty */

			if (trace_empty(iter))

				return;



			print_trace_header(s, iter);

			flags |= TRACE_GRAPH_PRINT_DURATION;

		} else

			flags |= TRACE_GRAPH_PRINT_ABS_TIME;



		print_graph_headers_flags(s, flags);

	} else

	if (is_graph())

		print_graph_headers_flags(s, GRAPH_TRACER_FLAGS);

	else

		trace_default_header(s);

}



static void

trace_graph_function(struct trace_array *tr,

		 unsigned long ip, unsigned long flags, int pc)

{

	u64 time = trace_clock_local();

	struct ftrace_graph_ent ent = {

		.func  = ip,

		.depth = 0,

	};

	struct ftrace_graph_ret ret = {

		.func     = ip,

		.depth    = 0,

		.calltime = time,

		.rettime  = time,

	};



	__trace_graph_entry(tr, &ent, flags, pc);

	__trace_graph_return(tr, &ret, flags, pc);

}



static void

__trace_function(struct trace_array *tr,

		 unsigned long ip, unsigned long parent_ip,

		 unsigned long flags, int pc)

{

	if (!is_graph())

	if (is_graph())

		trace_graph_function(tr, ip, parent_ip, flags, pc);

	else

		trace_function(tr, ip, parent_ip, flags, pc);

	else {

		trace_graph_function(tr, parent_ip, flags, pc);

		trace_graph_function(tr, ip, flags, pc);

	}

}



#else