From: Steven Rostedt <rostedt@goodmis.org>
To: linux-kernel@vger.kernel.org
Cc: Ingo Molnar <mingo@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Frederic Weisbecker <fweisbec@gmail.com>,
Yoshihiro YUNOMAE <yoshihiro.yunomae.ez@hitachi.com>,
David Sharp <dhsharp@google.com>
Subject: [PATCH 16/22] tracing: Show raw time stamp on stats per cpu using counter or tsc mode for trace_clock
Date: Fri, 02 Nov 2012 09:33:08 -0400 [thread overview]
Message-ID: <20121102133500.904920696@goodmis.org> (raw)
In-Reply-To: 20121102133251.998500247@goodmis.org
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From: Yoshihiro YUNOMAE <yoshihiro.yunomae.ez@hitachi.com>
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/1349998076-15495-6-git-send-email-dhsharp@google.com
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Yoshihiro YUNOMAE <yoshihiro.yunomae.ez@hitachi.com>
Signed-off-by: David Sharp <dhsharp@google.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
---
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 e0e7a8d..599b29a 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -4452,13 +4452,24 @@ 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);
--
1.7.10.4
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next prev parent reply other threads:[~2012-11-02 13:36 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-02 13:32 [PATCH 00/22] [GIT PULL][3.8] tracing: updates Steven Rostedt
2012-11-02 13:32 ` [PATCH 01/22] tracing: Replace strict_strto* with kstrto* Steven Rostedt
2012-11-02 13:32 ` [PATCH 02/22] tracing: Allow tracers to start at core initcall Steven Rostedt
2012-11-02 13:32 ` [PATCH 03/22] tracing: Change tracers integer flags to bool Steven Rostedt
2012-11-02 13:32 ` [PATCH 04/22] ring-buffer: Add a dropped events counter Steven Rostedt
2012-11-02 13:32 ` [PATCH 05/22] tracing: Expand ring buffer when trace_printk() is used Steven Rostedt
2012-11-02 13:32 ` [PATCH 06/22] tracing: Enable comm recording if " Steven Rostedt
2012-11-02 13:32 ` [PATCH 07/22] tracing: Have tracing_sched_wakeup_trace() use standard unlock_commit Steven Rostedt
2012-11-02 13:33 ` [PATCH 08/22] tracing: Cache comms only after an event occurred Steven Rostedt
2012-11-02 13:33 ` [PATCH 09/22] tracing: Trivial cleanup Steven Rostedt
2012-11-02 13:33 ` [PATCH 10/22] tracing: Cleanup unnecessary function declarations Steven Rostedt
2012-11-02 13:33 ` [PATCH 11/22] linux/kernel.h: Remove duplicate trace_printk declaration Steven Rostedt
2012-11-02 13:33 ` [PATCH 12/22] tracing,x86: Add a TSC trace_clock Steven Rostedt
2012-11-02 13:33 ` [PATCH 13/22] tracing: Reset ring buffer when changing trace_clocks Steven Rostedt
2012-11-02 13:33 ` [PATCH 14/22] tracing: Format non-nanosec times from tsc clock without a decimal point Steven Rostedt
2012-11-02 13:33 ` [PATCH 15/22] ring-buffer: Change unsigned long type of ring_buffer_oldest_event_ts() to u64 Steven Rostedt
2012-11-02 13:33 ` Steven Rostedt [this message]
2012-11-02 13:33 ` [PATCH 17/22] tracing: Separate open function from set_event and available_events Steven Rostedt
2012-11-02 13:33 ` [PATCH 18/22] tracing: Remove unused function unregister_tracer() Steven Rostedt
2012-11-02 13:33 ` [PATCH 19/22] tracing: Make tracing_enabled be equal to tracing_on Steven Rostedt
2012-11-02 13:33 ` [PATCH 20/22] tracing: Remove deprecated tracing_enabled file Steven Rostedt
2012-11-02 13:33 ` [PATCH 21/22] tracing: Use irq_work for wake ups and remove *_nowake_*() functions Steven Rostedt
2012-11-02 13:33 ` [PATCH 22/22] tracing: Add trace_options kernel command line parameter Steven Rostedt
2012-11-02 14:08 ` [PATCH 00/22] [GIT PULL][3.8] tracing: updates Steven Rostedt
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