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libtraceevent, perf tools: Changes in tep_print_event_* APIs

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Libtraceevent APIs for printing various trace events information are
complicated, there are complex extra parameters. To control the way
event information is printed, the user should call a set of functions in
a specific sequence.

These APIs are reimplemented to provide a more simple interface for
printing event information.

Removed APIs:

 	tep_print_event_task()
	tep_print_event_time()
	tep_print_event_data()
	tep_event_info()
	tep_is_latency_format()
	tep_set_latency_format()
	tep_data_latency_format()
	tep_set_print_raw()

A new API for printing event information is introduced:
   void tep_print_event(struct tep_handle *tep, struct trace_seq *s,
		        struct tep_record *record, const char *fmt, ...);
where "fmt" is a printf-like format string, followed by the event
fields to be printed. Supported fields:
 TEP_PRINT_PID, "%d" - event PID
 TEP_PRINT_CPU, "%d" - event CPU
 TEP_PRINT_COMM, "%s" - event command string
 TEP_PRINT_NAME, "%s" - event name
 TEP_PRINT_LATENCY, "%s" - event latency
 TEP_PRINT_TIME, %d - event time stamp. A divisor and precision
   can be specified as part of this format string:
   "%precision.divisord". Example:
   "%3.1000d" - divide the time by 1000 and print the first 3 digits
   before the dot. Thus, the time stamp "123456000" will be printed as
   "123.456"
 TEP_PRINT_INFO, "%s" - event information.
 TEP_PRINT_INFO_RAW, "%s" - event information, in raw format.

Example:
  tep_print_event(tep, s, record, "%16s-%-5d [%03d] %s %6.1000d %s %s",
		  TEP_PRINT_COMM, TEP_PRINT_PID, TEP_PRINT_CPU,
		  TEP_PRINT_LATENCY, TEP_PRINT_TIME, TEP_PRINT_NAME, TEP_PRINT_INFO);
Output:
	ls-11314 [005] d.h. 185207.366383 function __wake_up

Signed-off-by: Tzvetomir Stoyanov <tstoyanov@vmware.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: linux-trace-devel@vger.kernel.org
Cc: Patrick McLean <chutzpah@gentoo.org>
Link: http://lore.kernel.org/linux-trace-devel/20190801074959.22023-2-tz.stoyanov@gmail.com
Link: http://lore.kernel.org/lkml/20190805204355.041132030@goodmis.org
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Tzvetomir Stoyanov 2019-08-05 16:43:13 -04:00 • committed by Arnaldo Carvalho de Melo
parent 4cb3c6d546
commit 38847db974
7 changed files with 215 additions and 212 deletions
Download patch file Download diff file Expand all files Collapse all files

29
tools/lib/traceevent/event-parse.h
View file

@ -442,18 +442,18 @@ int tep_register_print_string(struct tep_handle *tep, const char *fmt,
unsigned long long addr);
bool tep_is_pid_registered(struct tep_handle *tep, int pid);
void tep_print_event_task(struct tep_handle *tep, struct trace_seq *s,
struct tep_event *event,
struct tep_record *record);
void tep_print_event_time(struct tep_handle *tep, struct trace_seq *s,
struct tep_event *event,
struct tep_record *record,
bool use_trace_clock);
void tep_print_event_data(struct tep_handle *tep, struct trace_seq *s,
struct tep_event *event,
struct tep_record *record);
#define TEP_PRINT_INFO "INFO"
#define TEP_PRINT_INFO_RAW "INFO_RAW"
#define TEP_PRINT_COMM "COMM"
#define TEP_PRINT_LATENCY "LATENCY"
#define TEP_PRINT_NAME "NAME"
#define TEP_PRINT_PID 1U
#define TEP_PRINT_TIME 2U
#define TEP_PRINT_CPU 3U
void tep_print_event(struct tep_handle *tep, struct trace_seq *s,
struct tep_record *record, bool use_trace_clock);
struct tep_record *record, const char *fmt, ...)
__attribute__ ((format (printf, 4, 5)));
int tep_parse_header_page(struct tep_handle *tep, char *buf, unsigned long size,
int long_size);
@ -525,8 +525,6 @@ tep_find_event_by_name(struct tep_handle *tep, const char *sys, const char *name
struct tep_event *
tep_find_event_by_record(struct tep_handle *tep, struct tep_record *record);
void tep_data_latency_format(struct tep_handle *tep,
struct trace_seq *s, struct tep_record *record);
int tep_data_type(struct tep_handle *tep, struct tep_record *rec);
int tep_data_pid(struct tep_handle *tep, struct tep_record *rec);
int tep_data_preempt_count(struct tep_handle *tep, struct tep_record *rec);
@ -541,8 +539,6 @@ void tep_print_field(struct trace_seq *s, void *data,
struct tep_format_field *field);
void tep_print_fields(struct trace_seq *s, void *data,
int size __maybe_unused, struct tep_event *event);
void tep_event_info(struct trace_seq *s, struct tep_event *event,
struct tep_record *record);
int tep_strerror(struct tep_handle *tep, enum tep_errno errnum,
char *buf, size_t buflen);
@ -566,12 +562,9 @@ bool tep_is_file_bigendian(struct tep_handle *tep);
void tep_set_file_bigendian(struct tep_handle *tep, enum tep_endian endian);
bool tep_is_local_bigendian(struct tep_handle *tep);
void tep_set_local_bigendian(struct tep_handle *tep, enum tep_endian endian);
bool tep_is_latency_format(struct tep_handle *tep);
void tep_set_latency_format(struct tep_handle *tep, int lat);
int tep_get_header_page_size(struct tep_handle *tep);
int tep_get_header_timestamp_size(struct tep_handle *tep);
bool tep_is_old_format(struct tep_handle *tep);
void tep_set_print_raw(struct tep_handle *tep, int print_raw);
void tep_set_test_filters(struct tep_handle *tep, int test_filters);
struct tep_handle *tep_alloc(void);