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tracing: Fix branch tracer header

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Before patch:

  # tracer: branch
  #
  #           TASK-PID    CPU#    TIMESTAMP  FUNCTION
  #              | |       |          |         |
             <...>-2981  [000] 24008.872738: [  ok  ] trace_irq_handler_exit:irq_event_types.h:41
             <...>-2981  [000] 24008.872742: [  ok  ] note_interrupt:spurious.c:229
  ...

After patch:

  # tracer: branch
  #
  #           TASK-PID    CPU#    TIMESTAMP  CORRECT  FUNC:FILE:LINE
  #              | |       |          |         |       |
             <...>-2985  [000] 26329.142970: [  ok  ] slab_free:slub.c:1776
             <...>-2985  [000] 26329.142972: [  ok  ] trace_kmem_cache_free:kmem_event_types.h:191
  ...

Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Tom Zanussi <tzanussi@gmail.com>
LKML-Reference: <49E2F19A.3040006@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Zhaolei 2009-04-13 16:02:34 +08:00 committed by Ingo Molnar
parent a3d03ecaf9
commit 557055bebe
1 changed files with 8 additions and 0 deletions
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8
kernel/trace/trace_branch.c
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@ -155,6 +155,13 @@ static enum print_line_t trace_branch_print(struct trace_iterator *iter,
return TRACE_TYPE_HANDLED; return TRACE_TYPE_HANDLED;
} }
static void branch_print_header(struct seq_file *s)
{
seq_puts(s, "# TASK-PID CPU# TIMESTAMP CORRECT"
" FUNC:FILE:LINE\n");
seq_puts(s, "# | | | | | "
" |\n");
}
static struct trace_event trace_branch_event = { static struct trace_event trace_branch_event = {
.type = TRACE_BRANCH, .type = TRACE_BRANCH,
@ -169,6 +176,7 @@ static struct tracer branch_trace __read_mostly =
#ifdef CONFIG_FTRACE_SELFTEST #ifdef CONFIG_FTRACE_SELFTEST
.selftest = trace_selftest_startup_branch, .selftest = trace_selftest_startup_branch,
#endif /* CONFIG_FTRACE_SELFTEST */ #endif /* CONFIG_FTRACE_SELFTEST */
.print_header = branch_print_header,
}; };
__init static int init_branch_tracer(void) __init static int init_branch_tracer(void)