Commit-ID: 11043d8b125671a32253cddb0b05177be0e976f6
Gitweb: http://git.kernel.org/tip/11043d8b125671a32253cddb0b05177be0e976f6
Author: Yoshihiro YUNOMAE <yoshihiro.yunomae.ez@xxxxxxxxxxx>
AuthorDate: Tue, 13 Nov 2012 12:18:23 -0800
Committer: Steven Rostedt <rostedt@xxxxxxxxxxx>
CommitDate: Tue, 13 Nov 2012 15:49:11 -0500
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@xxxxxxxxxx
Cc: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Signed-off-by: Yoshihiro YUNOMAE <yoshihiro.yunomae.ez@xxxxxxxxxxx>
Signed-off-by: David Sharp <dhsharp@xxxxxxxxxx>
Signed-off-by: Steven Rostedt <rostedt@xxxxxxxxxxx>
---
kernel/trace/trace.c | 23 +++++++++++++++++------
1 file changed, 17 insertions(+), 6 deletions(-)
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index d943e69..b69cc38 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -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);
- 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);
+ 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);
+
+ 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));
- 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);
+ 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);
--
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