[PATCH] introduce dbg_printf_pevent_info() function

[Sergey Senozhatsky]

Introduce dbg_printf_pevent_info() for event debugging simplification.
Events are printed to STDERR, one event per line.
(pevent trace_seq_do_printf() uses STDOUT, making it difficult to read through
mixed powertop and trace_seq outputs).

$ powertop 2>events
$ less events
prev_comm=ksoftirqd/0 prev_pid=3 prev_prio=120 prev_state=0x1 next_comm=swapper/0 next_pid=0 next_prio=120
prev_comm=swapper/0 prev_pid=0 prev_prio=120 prev_state=0x0 next_comm=ksoftirqd/0 next_pid=3 next_prio=120
prev_comm=ksoftirqd/0 prev_pid=3 prev_prio=120 prev_state=0x1 next_comm=swapper/0 next_pid=0 next_prio=120
prev_comm=swapper/0 prev_pid=0 prev_prio=120 prev_state=0x0 next_comm=X next_pid=2795 next_prio=119
[..]

Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky-***@public.gmane.org>

---

src/process/do_process.cpp | 13 ++++++++++++-
1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/src/process/do_process.cpp b/src/process/do_process.cpp
index c030d47..7c27e08 100644
--- a/src/process/do_process.cpp
+++ b/src/process/do_process.cpp
@@ -186,7 +186,18 @@ int dont_blame_me(char *comm)
return 0;
}

-
+static void dbg_printf_pevent_info(struct event_format *event, struct record *rec)
+{
+ static struct trace_seq s;
+
+ event->pevent->print_raw = 1;
+ trace_seq_init(&s);
+ pevent_event_info(&s, event, rec);
+ trace_seq_putc(&s, '\n');
+ trace_seq_terminate(&s);
+ fprintf(stderr, "%.*s", s.len, s.buffer);
+ trace_seq_destroy(&s);
+}

void perf_process_bundle::handle_trace_point(void *trace, int cpu, uint64_t time)
{