Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 11043d8b authored by Yoshihiro YUNOMAE's avatar Yoshihiro YUNOMAE Committed by Steven Rostedt
Browse files

tracing: Show raw time stamp on stats per cpu using counter or tsc mode for trace_clock 

Show raw time stamp values for stats per cpu if you choose counter or tsc mode
for trace_clock. Although a unit of tracing time stamp is nsec in local or global mode,
the units in counter and TSC mode are tracing counter and cycles respectively.
Link: http://lkml.kernel.org/r/1352837903-32191-3-git-send-email-dhsharp@google.com



Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Signed-off-by: default avatarYoshihiro YUNOMAE <yoshihiro.yunomae.ez@hitachi.com>
Signed-off-by: default avatarDavid Sharp <dhsharp@google.com>
Signed-off-by: default avatarSteven Rostedt <rostedt@goodmis.org>
parent 8be0709f

kernel/trace/trace.c

+17 −6
Original line number Diff line number Diff line
@@ -4388,13 +4388,24 @@ tracing_stats_read(struct file *filp, char __user *ubuf, 
	cnt = ring_buffer_bytes_cpu(tr->buffer, cpu);

	trace_seq_printf(s, "bytes: %ld\n", cnt);



	if (trace_clocks[trace_clock_id].in_ns) {

		/* local or global for trace_clock */

		t = ns2usecs(ring_buffer_oldest_event_ts(tr->buffer, cpu));

		usec_rem = do_div(t, USEC_PER_SEC);

	trace_seq_printf(s, "oldest event ts: %5llu.%06lu\n", t, usec_rem);

		trace_seq_printf(s, "oldest event ts: %5llu.%06lu\n",

								t, usec_rem);



		t = ns2usecs(ring_buffer_time_stamp(tr->buffer, cpu));

		usec_rem = do_div(t, USEC_PER_SEC);

		trace_seq_printf(s, "now ts: %5llu.%06lu\n", t, usec_rem);

	} else {

		/* counter or tsc mode for trace_clock */

		trace_seq_printf(s, "oldest event ts: %llu\n",

				ring_buffer_oldest_event_ts(tr->buffer, cpu));



		trace_seq_printf(s, "now ts: %llu\n",

				ring_buffer_time_stamp(tr->buffer, cpu));

	}



	cnt = ring_buffer_dropped_events_cpu(tr->buffer, cpu);

	trace_seq_printf(s, "dropped events: %ld\n", cnt);