tools lib traceevent: Add support for extracting trace_clock in report

If trace-cmd extracts trace_clock, trace-cmd reads trace_clock data from
the trace.dat and switches outputting format of timestamp for each
trace_clock.

Signed-off-by: Yoshihiro YUNOMAE <yoshihiro.yunomae.ez@hitachi.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/r/20130424231305.14877.86147.stgit@yunodevel
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c
index d1c2a6a..deedff9 100644 (file)
--- a/tools/lib/traceevent/event-parse.c
+++ b/tools/lib/traceevent/event-parse.c
@@ -305,6 +305,11 @@ int pevent_register_comm(struct pevent *pevent, const char *comm, int pid)
        return 0;
 }
 
+void pevent_register_trace_clock(struct pevent *pevent, char *trace_clock)
+{
+       pevent->trace_clock = trace_clock;
+}
+
 struct func_map {
        unsigned long long              addr;
        char                            *func;
@@ -4443,8 +4448,21 @@ void pevent_event_info(struct trace_seq *s, struct event_format *event,
        trace_seq_terminate(s);
 }
 
+static bool is_timestamp_in_us(char *trace_clock, bool use_trace_clock)
+{
+       if (!use_trace_clock)
+               return true;
+
+       if (!strcmp(trace_clock, "local") || !strcmp(trace_clock, "global")
+           || !strcmp(trace_clock, "uptime") || !strcmp(trace_clock, "perf"))
+               return true;
+
+       /* trace_clock is setting in tsc or counter mode */
+       return false;
+}
+
 void pevent_print_event(struct pevent *pevent, struct trace_seq *s,
-                       struct pevent_record *record)
+                       struct pevent_record *record, bool use_trace_clock)
 {
        static const char *spaces = "                    "; /* 20 spaces */
        struct event_format *event;
@@ -4457,9 +4475,14 @@ void pevent_print_event(struct pevent *pevent, struct trace_seq *s,
        int pid;
        int len;
        int p;
+       bool use_usec_format;
 
-       secs = record->ts / NSECS_PER_SEC;
-       nsecs = record->ts - secs * NSECS_PER_SEC;
+       use_usec_format = is_timestamp_in_us(pevent->trace_clock,
+                                                       use_trace_clock);
+       if (use_usec_format) {
+               secs = record->ts / NSECS_PER_SEC;
+               nsecs = record->ts - secs * NSECS_PER_SEC;
+       }
 
        if (record->size < 0) {
                do_warning("ug! negative record size %d", record->size);
@@ -4484,15 +4507,20 @@ void pevent_print_event(struct pevent *pevent, struct trace_seq *s,
        } else
                trace_seq_printf(s, "%16s-%-5d [%03d]", comm, pid, record->cpu);
 
-       if (pevent->flags & PEVENT_NSEC_OUTPUT) {
-               usecs = nsecs;
-               p = 9;
-       } else {
-               usecs = (nsecs + 500) / NSECS_PER_USEC;
-               p = 6;
-       }
+       if (use_usec_format) {
+               if (pevent->flags & PEVENT_NSEC_OUTPUT) {
+                       usecs = nsecs;
+                       p = 9;
+               } else {
+                       usecs = (nsecs + 500) / NSECS_PER_USEC;
+                       p = 6;
+               }
 
-       trace_seq_printf(s, " %5lu.%0*lu: %s: ", secs, p, usecs, event->name);
+               trace_seq_printf(s, " %5lu.%0*lu: %s: ",
+                                       secs, p, usecs, event->name);
+       } else
+               trace_seq_printf(s, " %12llu: %s: ",
+                                       record->ts, event->name);
 
        /* Space out the event names evenly. */
        len = strlen(event->name);

diff --git a/tools/lib/traceevent/event-parse.h b/tools/lib/traceevent/event-parse.h
index c37b202..7503edf 100644 (file)
--- a/tools/lib/traceevent/event-parse.h
+++ b/tools/lib/traceevent/event-parse.h
@@ -20,6 +20,7 @@
 #ifndef _PARSE_EVENTS_H
 #define _PARSE_EVENTS_H
 
+#include <stdbool.h>
 #include <stdarg.h>
 #include <regex.h>
 
@@ -450,6 +451,8 @@ struct pevent {
 
        /* cache */
        struct event_format *last_event;
+
+       char *trace_clock;
 };
 
 static inline void pevent_set_flag(struct pevent *pevent, int flag)
@@ -527,6 +530,7 @@ enum trace_flag_type {
 };
 
 int pevent_register_comm(struct pevent *pevent, const char *comm, int pid);
+void pevent_register_trace_clock(struct pevent *pevent, char *trace_clock);
 int pevent_register_function(struct pevent *pevent, char *name,
                             unsigned long long addr, char *mod);
 int pevent_register_print_string(struct pevent *pevent, char *fmt,
@@ -534,7 +538,7 @@ int pevent_register_print_string(struct pevent *pevent, char *fmt,
 int pevent_pid_is_registered(struct pevent *pevent, int pid);
 
 void pevent_print_event(struct pevent *pevent, struct trace_seq *s,
-                       struct pevent_record *record);
+                       struct pevent_record *record, bool use_trace_clock);
 
 int pevent_parse_header_page(struct pevent *pevent, char *buf, unsigned long size,
                             int long_size);