Merge branch 'tip/perf/core' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace into perf/core
This commit is contained in:
Ingo Molnar
commit
750ed158bf
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@ -1638,8 +1638,8 @@ ftrace_failures_open(struct inode *inode, struct file *file)
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ret = ftrace_avail_open(inode, file);
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if (!ret) {
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m = (struct seq_file *)file->private_data;
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iter = (struct ftrace_iterator *)m->private;
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m = file->private_data;
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iter = m->private;
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iter->flags = FTRACE_ITER_FAILURES;
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}
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@ -2196,7 +2196,7 @@ int tracing_open_generic(struct inode *inode, struct file *filp)
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static int tracing_release(struct inode *inode, struct file *file)
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{
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struct seq_file *m = (struct seq_file *)file->private_data;
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struct seq_file *m = file->private_data;
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struct trace_iterator *iter;
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int cpu;
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@ -343,6 +343,10 @@ void trace_function(struct trace_array *tr,
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unsigned long ip,
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unsigned long parent_ip,
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unsigned long flags, int pc);
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void trace_graph_function(struct trace_array *tr,
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unsigned long ip,
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unsigned long parent_ip,
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unsigned long flags, int pc);
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void trace_default_header(struct seq_file *m);
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void print_trace_header(struct seq_file *m, struct trace_iterator *iter);
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int trace_empty(struct trace_iterator *iter);
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@ -262,6 +262,34 @@ int trace_graph_thresh_entry(struct ftrace_graph_ent *trace)
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return trace_graph_entry(trace);
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}
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static void
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__trace_graph_function(struct trace_array *tr,
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unsigned long ip, unsigned long flags, int pc)
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{
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u64 time = trace_clock_local();
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struct ftrace_graph_ent ent = {
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.func = ip,
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.depth = 0,
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};
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struct ftrace_graph_ret ret = {
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.func = ip,
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.depth = 0,
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.calltime = time,
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.rettime = time,
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};
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__trace_graph_entry(tr, &ent, flags, pc);
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__trace_graph_return(tr, &ret, flags, pc);
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}
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void
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trace_graph_function(struct trace_array *tr,
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unsigned long ip, unsigned long parent_ip,
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unsigned long flags, int pc)
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{
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__trace_graph_function(tr, ip, flags, pc);
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}
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void __trace_graph_return(struct trace_array *tr,
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struct ftrace_graph_ret *trace,
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unsigned long flags,
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@ -888,12 +916,20 @@ check_irq_entry(struct trace_iterator *iter, u32 flags,
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unsigned long addr, int depth)
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{
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int cpu = iter->cpu;
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int *depth_irq;
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struct fgraph_data *data = iter->private;
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int *depth_irq = &(per_cpu_ptr(data->cpu_data, cpu)->depth_irq);
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if (flags & TRACE_GRAPH_PRINT_IRQS)
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/*
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* If we are either displaying irqs, or we got called as
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* a graph event and private data does not exist,
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* then we bypass the irq check.
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*/
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if ((flags & TRACE_GRAPH_PRINT_IRQS) ||
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(!data))
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return 0;
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depth_irq = &(per_cpu_ptr(data->cpu_data, cpu)->depth_irq);
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/*
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* We are inside the irq code
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*/
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@ -926,12 +962,20 @@ static int
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check_irq_return(struct trace_iterator *iter, u32 flags, int depth)
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{
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int cpu = iter->cpu;
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int *depth_irq;
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struct fgraph_data *data = iter->private;
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int *depth_irq = &(per_cpu_ptr(data->cpu_data, cpu)->depth_irq);
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if (flags & TRACE_GRAPH_PRINT_IRQS)
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/*
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* If we are either displaying irqs, or we got called as
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* a graph event and private data does not exist,
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* then we bypass the irq check.
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*/
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if ((flags & TRACE_GRAPH_PRINT_IRQS) ||
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(!data))
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return 0;
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depth_irq = &(per_cpu_ptr(data->cpu_data, cpu)->depth_irq);
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/*
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* We are not inside the irq code.
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*/
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@ -1163,7 +1207,7 @@ print_graph_comment(struct trace_seq *s, struct trace_entry *ent,
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enum print_line_t
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print_graph_function_flags(struct trace_iterator *iter, u32 flags)
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__print_graph_function_flags(struct trace_iterator *iter, u32 flags)
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{
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struct ftrace_graph_ent_entry *field;
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struct fgraph_data *data = iter->private;
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@ -1226,7 +1270,18 @@ print_graph_function_flags(struct trace_iterator *iter, u32 flags)
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static enum print_line_t
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print_graph_function(struct trace_iterator *iter)
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{
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return print_graph_function_flags(iter, tracer_flags.val);
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return __print_graph_function_flags(iter, tracer_flags.val);
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}
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enum print_line_t print_graph_function_flags(struct trace_iterator *iter,
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u32 flags)
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{
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if (trace_flags & TRACE_ITER_LATENCY_FMT)
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flags |= TRACE_GRAPH_PRINT_DURATION;
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else
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flags |= TRACE_GRAPH_PRINT_ABS_TIME;
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return __print_graph_function_flags(iter, flags);
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}
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static enum print_line_t
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@ -1258,7 +1313,7 @@ static void print_lat_header(struct seq_file *s, u32 flags)
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seq_printf(s, "#%.*s|||| / \n", size, spaces);
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}
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void print_graph_headers_flags(struct seq_file *s, u32 flags)
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static void __print_graph_headers_flags(struct seq_file *s, u32 flags)
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{
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int lat = trace_flags & TRACE_ITER_LATENCY_FMT;
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@ -1299,6 +1354,23 @@ void print_graph_headers(struct seq_file *s)
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print_graph_headers_flags(s, tracer_flags.val);
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}
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void print_graph_headers_flags(struct seq_file *s, u32 flags)
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{
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struct trace_iterator *iter = s->private;
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if (trace_flags & TRACE_ITER_LATENCY_FMT) {
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/* print nothing if the buffers are empty */
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if (trace_empty(iter))
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return;
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print_trace_header(s, iter);
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flags |= TRACE_GRAPH_PRINT_DURATION;
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} else
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flags |= TRACE_GRAPH_PRINT_ABS_TIME;
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__print_graph_headers_flags(s, flags);
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}
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void graph_trace_open(struct trace_iterator *iter)
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{
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/* pid and depth on the last trace processed */
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@ -87,14 +87,22 @@ static __cacheline_aligned_in_smp unsigned long max_sequence;
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#ifdef CONFIG_FUNCTION_TRACER
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/*
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* irqsoff uses its own tracer function to keep the overhead down:
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* Prologue for the preempt and irqs off function tracers.
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*
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* Returns 1 if it is OK to continue, and data->disabled is
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* incremented.
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* 0 if the trace is to be ignored, and data->disabled
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* is kept the same.
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*
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* Note, this function is also used outside this ifdef but
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* inside the #ifdef of the function graph tracer below.
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* This is OK, since the function graph tracer is
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* dependent on the function tracer.
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*/
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static void
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irqsoff_tracer_call(unsigned long ip, unsigned long parent_ip)
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static int func_prolog_dec(struct trace_array *tr,
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struct trace_array_cpu **data,
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unsigned long *flags)
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{
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struct trace_array *tr = irqsoff_trace;
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struct trace_array_cpu *data;
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unsigned long flags;
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long disabled;
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int cpu;
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@ -106,18 +114,38 @@ irqsoff_tracer_call(unsigned long ip, unsigned long parent_ip)
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*/
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cpu = raw_smp_processor_id();
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if (likely(!per_cpu(tracing_cpu, cpu)))
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return;
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return 0;
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local_save_flags(flags);
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local_save_flags(*flags);
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/* slight chance to get a false positive on tracing_cpu */
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if (!irqs_disabled_flags(flags))
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return;
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if (!irqs_disabled_flags(*flags))
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return 0;
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data = tr->data[cpu];
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disabled = atomic_inc_return(&data->disabled);
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*data = tr->data[cpu];
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disabled = atomic_inc_return(&(*data)->disabled);
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if (likely(disabled == 1))
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trace_function(tr, ip, parent_ip, flags, preempt_count());
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return 1;
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atomic_dec(&(*data)->disabled);
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return 0;
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}
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/*
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* irqsoff uses its own tracer function to keep the overhead down:
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*/
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static void
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irqsoff_tracer_call(unsigned long ip, unsigned long parent_ip)
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{
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struct trace_array *tr = irqsoff_trace;
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struct trace_array_cpu *data;
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unsigned long flags;
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if (!func_prolog_dec(tr, &data, &flags))
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return;
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trace_function(tr, ip, parent_ip, flags, preempt_count());
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atomic_dec(&data->disabled);
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}
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@ -155,30 +183,16 @@ static int irqsoff_graph_entry(struct ftrace_graph_ent *trace)
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struct trace_array *tr = irqsoff_trace;
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struct trace_array_cpu *data;
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unsigned long flags;
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long disabled;
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int ret;
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int cpu;
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int pc;
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cpu = raw_smp_processor_id();
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if (likely(!per_cpu(tracing_cpu, cpu)))
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if (!func_prolog_dec(tr, &data, &flags))
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return 0;
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local_save_flags(flags);
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/* slight chance to get a false positive on tracing_cpu */
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if (!irqs_disabled_flags(flags))
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return 0;
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data = tr->data[cpu];
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disabled = atomic_inc_return(&data->disabled);
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if (likely(disabled == 1)) {
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pc = preempt_count();
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ret = __trace_graph_entry(tr, trace, flags, pc);
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} else
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ret = 0;
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pc = preempt_count();
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ret = __trace_graph_entry(tr, trace, flags, pc);
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atomic_dec(&data->disabled);
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return ret;
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}
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@ -187,27 +201,13 @@ static void irqsoff_graph_return(struct ftrace_graph_ret *trace)
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struct trace_array *tr = irqsoff_trace;
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struct trace_array_cpu *data;
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unsigned long flags;
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long disabled;
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int cpu;
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int pc;
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cpu = raw_smp_processor_id();
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if (likely(!per_cpu(tracing_cpu, cpu)))
|
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if (!func_prolog_dec(tr, &data, &flags))
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return;
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|
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local_save_flags(flags);
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/* slight chance to get a false positive on tracing_cpu */
|
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if (!irqs_disabled_flags(flags))
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return;
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|
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data = tr->data[cpu];
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disabled = atomic_inc_return(&data->disabled);
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|
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if (likely(disabled == 1)) {
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pc = preempt_count();
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__trace_graph_return(tr, trace, flags, pc);
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}
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|
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pc = preempt_count();
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__trace_graph_return(tr, trace, flags, pc);
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atomic_dec(&data->disabled);
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}
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|
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|
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@ -229,75 +229,33 @@ static void irqsoff_trace_close(struct trace_iterator *iter)
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|
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static enum print_line_t irqsoff_print_line(struct trace_iterator *iter)
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{
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u32 flags = GRAPH_TRACER_FLAGS;
|
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|
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if (trace_flags & TRACE_ITER_LATENCY_FMT)
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flags |= TRACE_GRAPH_PRINT_DURATION;
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else
|
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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())
|
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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
|
||||
|
|
|
|||
|
|
@ -31,13 +31,81 @@ static int wakeup_rt;
|
|||
static arch_spinlock_t wakeup_lock =
|
||||
(arch_spinlock_t)__ARCH_SPIN_LOCK_UNLOCKED;
|
||||
|
||||
static void wakeup_reset(struct trace_array *tr);
|
||||
static void __wakeup_reset(struct trace_array *tr);
|
||||
static int wakeup_graph_entry(struct ftrace_graph_ent *trace);
|
||||
static void wakeup_graph_return(struct ftrace_graph_ret *trace);
|
||||
|
||||
static int save_lat_flag;
|
||||
|
||||
#define TRACE_DISPLAY_GRAPH 1
|
||||
|
||||
static struct tracer_opt trace_opts[] = {
|
||||
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
|
||||
/* display latency trace as call graph */
|
||||
{ TRACER_OPT(display-graph, TRACE_DISPLAY_GRAPH) },
|
||||
#endif
|
||||
{ } /* Empty entry */
|
||||
};
|
||||
|
||||
static struct tracer_flags tracer_flags = {
|
||||
.val = 0,
|
||||
.opts = trace_opts,
|
||||
};
|
||||
|
||||
#define is_graph() (tracer_flags.val & TRACE_DISPLAY_GRAPH)
|
||||
|
||||
#ifdef CONFIG_FUNCTION_TRACER
|
||||
|
||||
/*
|
||||
* irqsoff uses its own tracer function to keep the overhead down:
|
||||
* Prologue for the wakeup function tracers.
|
||||
*
|
||||
* Returns 1 if it is OK to continue, and preemption
|
||||
* is disabled and data->disabled is incremented.
|
||||
* 0 if the trace is to be ignored, and preemption
|
||||
* is not disabled 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 int
|
||||
func_prolog_preempt_disable(struct trace_array *tr,
|
||||
struct trace_array_cpu **data,
|
||||
int *pc)
|
||||
{
|
||||
long disabled;
|
||||
int cpu;
|
||||
|
||||
if (likely(!wakeup_task))
|
||||
return 0;
|
||||
|
||||
*pc = preempt_count();
|
||||
preempt_disable_notrace();
|
||||
|
||||
cpu = raw_smp_processor_id();
|
||||
if (cpu != wakeup_current_cpu)
|
||||
goto out_enable;
|
||||
|
||||
*data = tr->data[cpu];
|
||||
disabled = atomic_inc_return(&(*data)->disabled);
|
||||
if (unlikely(disabled != 1))
|
||||
goto out;
|
||||
|
||||
return 1;
|
||||
|
||||
out:
|
||||
atomic_dec(&(*data)->disabled);
|
||||
|
||||
out_enable:
|
||||
preempt_enable_notrace();
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* wakeup uses its own tracer function to keep the overhead down:
|
||||
*/
|
||||
static void
|
||||
wakeup_tracer_call(unsigned long ip, unsigned long parent_ip)
|
||||
|
|
@ -45,34 +113,16 @@ wakeup_tracer_call(unsigned long ip, unsigned long parent_ip)
|
|||
struct trace_array *tr = wakeup_trace;
|
||||
struct trace_array_cpu *data;
|
||||
unsigned long flags;
|
||||
long disabled;
|
||||
int cpu;
|
||||
int pc;
|
||||
|
||||
if (likely(!wakeup_task))
|
||||
if (!func_prolog_preempt_disable(tr, &data, &pc))
|
||||
return;
|
||||
|
||||
pc = preempt_count();
|
||||
preempt_disable_notrace();
|
||||
|
||||
cpu = raw_smp_processor_id();
|
||||
if (cpu != wakeup_current_cpu)
|
||||
goto out_enable;
|
||||
|
||||
data = tr->data[cpu];
|
||||
disabled = atomic_inc_return(&data->disabled);
|
||||
if (unlikely(disabled != 1))
|
||||
goto out;
|
||||
|
||||
local_irq_save(flags);
|
||||
|
||||
trace_function(tr, ip, parent_ip, flags, pc);
|
||||
|
||||
local_irq_restore(flags);
|
||||
|
||||
out:
|
||||
atomic_dec(&data->disabled);
|
||||
out_enable:
|
||||
preempt_enable_notrace();
|
||||
}
|
||||
|
||||
|
|
@ -82,6 +132,156 @@ static struct ftrace_ops trace_ops __read_mostly =
|
|||
};
|
||||
#endif /* CONFIG_FUNCTION_TRACER */
|
||||
|
||||
static int start_func_tracer(int graph)
|
||||
{
|
||||
int ret;
|
||||
|
||||
if (!graph)
|
||||
ret = register_ftrace_function(&trace_ops);
|
||||
else
|
||||
ret = register_ftrace_graph(&wakeup_graph_return,
|
||||
&wakeup_graph_entry);
|
||||
|
||||
if (!ret && tracing_is_enabled())
|
||||
tracer_enabled = 1;
|
||||
else
|
||||
tracer_enabled = 0;
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void stop_func_tracer(int graph)
|
||||
{
|
||||
tracer_enabled = 0;
|
||||
|
||||
if (!graph)
|
||||
unregister_ftrace_function(&trace_ops);
|
||||
else
|
||||
unregister_ftrace_graph();
|
||||
}
|
||||
|
||||
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
|
||||
static int wakeup_set_flag(u32 old_flags, u32 bit, int set)
|
||||
{
|
||||
|
||||
if (!(bit & TRACE_DISPLAY_GRAPH))
|
||||
return -EINVAL;
|
||||
|
||||
if (!(is_graph() ^ set))
|
||||
return 0;
|
||||
|
||||
stop_func_tracer(!set);
|
||||
|
||||
wakeup_reset(wakeup_trace);
|
||||
tracing_max_latency = 0;
|
||||
|
||||
return start_func_tracer(set);
|
||||
}
|
||||
|
||||
static int wakeup_graph_entry(struct ftrace_graph_ent *trace)
|
||||
{
|
||||
struct trace_array *tr = wakeup_trace;
|
||||
struct trace_array_cpu *data;
|
||||
unsigned long flags;
|
||||
int pc, ret = 0;
|
||||
|
||||
if (!func_prolog_preempt_disable(tr, &data, &pc))
|
||||
return 0;
|
||||
|
||||
local_save_flags(flags);
|
||||
ret = __trace_graph_entry(tr, trace, flags, pc);
|
||||
atomic_dec(&data->disabled);
|
||||
preempt_enable_notrace();
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void wakeup_graph_return(struct ftrace_graph_ret *trace)
|
||||
{
|
||||
struct trace_array *tr = wakeup_trace;
|
||||
struct trace_array_cpu *data;
|
||||
unsigned long flags;
|
||||
int pc;
|
||||
|
||||
if (!func_prolog_preempt_disable(tr, &data, &pc))
|
||||
return;
|
||||
|
||||
local_save_flags(flags);
|
||||
__trace_graph_return(tr, trace, flags, pc);
|
||||
atomic_dec(&data->disabled);
|
||||
|
||||
preempt_enable_notrace();
|
||||
return;
|
||||
}
|
||||
|
||||
static void wakeup_trace_open(struct trace_iterator *iter)
|
||||
{
|
||||
if (is_graph())
|
||||
graph_trace_open(iter);
|
||||
}
|
||||
|
||||
static void wakeup_trace_close(struct trace_iterator *iter)
|
||||
{
|
||||
if (iter->private)
|
||||
graph_trace_close(iter);
|
||||
}
|
||||
|
||||
#define GRAPH_TRACER_FLAGS (TRACE_GRAPH_PRINT_PROC)
|
||||
|
||||
static enum print_line_t wakeup_print_line(struct trace_iterator *iter)
|
||||
{
|
||||
/*
|
||||
* 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, GRAPH_TRACER_FLAGS);
|
||||
|
||||
return TRACE_TYPE_UNHANDLED;
|
||||
}
|
||||
|
||||
static void wakeup_print_header(struct seq_file *s)
|
||||
{
|
||||
if (is_graph())
|
||||
print_graph_headers_flags(s, GRAPH_TRACER_FLAGS);
|
||||
else
|
||||
trace_default_header(s);
|
||||
}
|
||||
|
||||
static void
|
||||
__trace_function(struct trace_array *tr,
|
||||
unsigned long ip, unsigned long parent_ip,
|
||||
unsigned long flags, int pc)
|
||||
{
|
||||
if (is_graph())
|
||||
trace_graph_function(tr, ip, parent_ip, flags, pc);
|
||||
else
|
||||
trace_function(tr, ip, parent_ip, flags, pc);
|
||||
}
|
||||
#else
|
||||
#define __trace_function trace_function
|
||||
|
||||
static int wakeup_set_flag(u32 old_flags, u32 bit, int set)
|
||||
{
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
static int wakeup_graph_entry(struct ftrace_graph_ent *trace)
|
||||
{
|
||||
return -1;
|
||||
}
|
||||
|
||||
static enum print_line_t wakeup_print_line(struct trace_iterator *iter)
|
||||
{
|
||||
return TRACE_TYPE_UNHANDLED;
|
||||
}
|
||||
|
||||
static void wakeup_graph_return(struct ftrace_graph_ret *trace) { }
|
||||
static void wakeup_print_header(struct seq_file *s) { }
|
||||
static void wakeup_trace_open(struct trace_iterator *iter) { }
|
||||
static void wakeup_trace_close(struct trace_iterator *iter) { }
|
||||
#endif /* CONFIG_FUNCTION_GRAPH_TRACER */
|
||||
|
||||
/*
|
||||
* Should this new latency be reported/recorded?
|
||||
*/
|
||||
|
|
@ -152,7 +352,7 @@ probe_wakeup_sched_switch(void *ignore,
|
|||
/* The task we are waiting for is waking up */
|
||||
data = wakeup_trace->data[wakeup_cpu];
|
||||
|
||||
trace_function(wakeup_trace, CALLER_ADDR0, CALLER_ADDR1, flags, pc);
|
||||
__trace_function(wakeup_trace, CALLER_ADDR0, CALLER_ADDR1, flags, pc);
|
||||
tracing_sched_switch_trace(wakeup_trace, prev, next, flags, pc);
|
||||
|
||||
T0 = data->preempt_timestamp;
|
||||
|
|
@ -252,7 +452,7 @@ probe_wakeup(void *ignore, struct task_struct *p, int success)
|
|||
* is not called by an assembly function (where as schedule is)
|
||||
* it should be safe to use it here.
|
||||
*/
|
||||
trace_function(wakeup_trace, CALLER_ADDR1, CALLER_ADDR2, flags, pc);
|
||||
__trace_function(wakeup_trace, CALLER_ADDR1, CALLER_ADDR2, flags, pc);
|
||||
|
||||
out_locked:
|
||||
arch_spin_unlock(&wakeup_lock);
|
||||
|
|
@ -303,12 +503,8 @@ static void start_wakeup_tracer(struct trace_array *tr)
|
|||
*/
|
||||
smp_wmb();
|
||||
|
||||
register_ftrace_function(&trace_ops);
|
||||
|
||||
if (tracing_is_enabled())
|
||||
tracer_enabled = 1;
|
||||
else
|
||||
tracer_enabled = 0;
|
||||
if (start_func_tracer(is_graph()))
|
||||
printk(KERN_ERR "failed to start wakeup tracer\n");
|
||||
|
||||
return;
|
||||
fail_deprobe_wake_new:
|
||||
|
|
@ -320,7 +516,7 @@ fail_deprobe:
|
|||
static void stop_wakeup_tracer(struct trace_array *tr)
|
||||
{
|
||||
tracer_enabled = 0;
|
||||
unregister_ftrace_function(&trace_ops);
|
||||
stop_func_tracer(is_graph());
|
||||
unregister_trace_sched_switch(probe_wakeup_sched_switch, NULL);
|
||||
unregister_trace_sched_wakeup_new(probe_wakeup, NULL);
|
||||
unregister_trace_sched_wakeup(probe_wakeup, NULL);
|
||||
|
|
@ -379,9 +575,15 @@ static struct tracer wakeup_tracer __read_mostly =
|
|||
.start = wakeup_tracer_start,
|
||||
.stop = wakeup_tracer_stop,
|
||||
.print_max = 1,
|
||||
.print_header = wakeup_print_header,
|
||||
.print_line = wakeup_print_line,
|
||||
.flags = &tracer_flags,
|
||||
.set_flag = wakeup_set_flag,
|
||||
#ifdef CONFIG_FTRACE_SELFTEST
|
||||
.selftest = trace_selftest_startup_wakeup,
|
||||
#endif
|
||||
.open = wakeup_trace_open,
|
||||
.close = wakeup_trace_close,
|
||||
.use_max_tr = 1,
|
||||
};
|
||||
|
||||
|
|
@ -394,9 +596,15 @@ static struct tracer wakeup_rt_tracer __read_mostly =
|
|||
.stop = wakeup_tracer_stop,
|
||||
.wait_pipe = poll_wait_pipe,
|
||||
.print_max = 1,
|
||||
.print_header = wakeup_print_header,
|
||||
.print_line = wakeup_print_line,
|
||||
.flags = &tracer_flags,
|
||||
.set_flag = wakeup_set_flag,
|
||||
#ifdef CONFIG_FTRACE_SELFTEST
|
||||
.selftest = trace_selftest_startup_wakeup,
|
||||
#endif
|
||||
.open = wakeup_trace_open,
|
||||
.close = wakeup_trace_close,
|
||||
.use_max_tr = 1,
|
||||
};
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue