diff options
Diffstat (limited to 'kernel/trace')
| -rw-r--r-- | kernel/trace/trace.c | 72 |
1 files changed, 47 insertions, 25 deletions
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index fa5cee639962..7392070ffc39 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -1845,6 +1845,33 @@ static void s_stop(struct seq_file *m, void *p) trace_event_read_unlock(); } +static void +get_total_entries(struct trace_array *tr, unsigned long *total, unsigned long *entries) +{ + unsigned long count; + int cpu; + + *total = 0; + *entries = 0; + + for_each_tracing_cpu(cpu) { + count = ring_buffer_entries_cpu(tr->buffer, cpu); + /* + * If this buffer has skipped entries, then we hold all + * entries for the trace and we need to ignore the + * ones before the time stamp. + */ + if (tr->data[cpu]->skipped_entries) { + count -= tr->data[cpu]->skipped_entries; + /* total is the same as the entries */ + *total += count; + } else + *total += count + + ring_buffer_overrun_cpu(tr->buffer, cpu); + *entries += count; + } +} + static void print_lat_help_header(struct seq_file *m) { seq_puts(m, "# _------=> CPU# \n"); @@ -1857,14 +1884,27 @@ static void print_lat_help_header(struct seq_file *m) seq_puts(m, "# \\ / ||||| \\ | / \n"); } -static void print_func_help_header(struct seq_file *m) +static void print_event_info(struct trace_array *tr, struct seq_file *m) { + unsigned long total; + unsigned long entries; + + get_total_entries(tr, &total, &entries); + seq_printf(m, "# entries-in-buffer/entries-written: %lu/%lu #P:%d\n", + entries, total, num_online_cpus()); + seq_puts(m, "#\n"); +} + +static void print_func_help_header(struct trace_array *tr, struct seq_file *m) +{ + print_event_info(tr, m); seq_puts(m, "# TASK-PID CPU# TIMESTAMP FUNCTION\n"); seq_puts(m, "# | | | | |\n"); } -static void print_func_help_header_irq(struct seq_file *m) +static void print_func_help_header_irq(struct trace_array *tr, struct seq_file *m) { + print_event_info(tr, m); seq_puts(m, "# _-----=> irqs-off\n"); seq_puts(m, "# / _----=> need-resched\n"); seq_puts(m, "# | / _---=> hardirq/softirq\n"); @@ -1881,32 +1921,14 @@ print_trace_header(struct seq_file *m, struct trace_iterator *iter) struct trace_array *tr = iter->tr; struct trace_array_cpu *data = tr->data[tr->cpu]; struct tracer *type = current_trace; - unsigned long entries = 0; - unsigned long total = 0; - unsigned long count; + unsigned long entries; + unsigned long total; const char *name = "preemption"; - int cpu; if (type) name = type->name; - - for_each_tracing_cpu(cpu) { - count = ring_buffer_entries_cpu(tr->buffer, cpu); - /* - * If this buffer has skipped entries, then we hold all - * entries for the trace and we need to ignore the - * ones before the time stamp. - */ - if (tr->data[cpu]->skipped_entries) { - count -= tr->data[cpu]->skipped_entries; - /* total is the same as the entries */ - total += count; - } else - total += count + - ring_buffer_overrun_cpu(tr->buffer, cpu); - entries += count; - } + get_total_entries(tr, &total, &entries); seq_printf(m, "# %s latency trace v1.1.5 on %s\n", name, UTS_RELEASE); @@ -2184,9 +2206,9 @@ void trace_default_header(struct seq_file *m) } else { if (!(trace_flags & TRACE_ITER_VERBOSE)) { if (trace_flags & TRACE_ITER_IRQ_INFO) - print_func_help_header_irq(m); + print_func_help_header_irq(iter->tr, m); else - print_func_help_header(m); + print_func_help_header(iter->tr, m); } } } |