diff options
| author | Yoshihiro YUNOMAE <[email protected]> | 2012-11-13 12:18:23 -0800 |
|---|---|---|
| committer | Steven Rostedt <[email protected]> | 2012-11-13 15:49:11 -0500 |
| commit | 11043d8b125671a32253cddb0b05177be0e976f6 (patch) | |
| tree | 9f440aeb014d66b3f284ff25cbae395c0d1a77fb | |
| parent | 8be0709f10e3dd5d7d07933ad61a9f18c4b93ca5 (diff) | |
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/[email protected]
Cc: Frederic Weisbecker <[email protected]>
Cc: Ingo Molnar <[email protected]>
Signed-off-by: Yoshihiro YUNOMAE <[email protected]>
Signed-off-by: David Sharp <[email protected]>
Signed-off-by: Steven Rostedt <[email protected]>
| -rw-r--r-- | kernel/trace/trace.c | 23 |
1 files changed, 17 insertions, 6 deletions
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index d943e69569cd..b69cc380322d 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); |