forked from Minki/linux
libtraceevent, perf tools: Changes in tep_print_event_* APIs
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
Arnaldo Carvalho de Melo
parent
4cb3c6d546
commit
38847db974
@ -302,33 +302,6 @@ void tep_set_local_bigendian(struct tep_handle *tep, enum tep_endian endian)
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tep->host_bigendian = endian;
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}
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/**
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* tep_is_latency_format - get if the latency output format is configured
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* @tep: a handle to the tep_handle
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*
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* This returns true if the latency output format is configured
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* If @tep is NULL, false is returned.
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*/
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bool tep_is_latency_format(struct tep_handle *tep)
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{
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if (tep)
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return (tep->latency_format);
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return false;
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}
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/**
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* tep_set_latency_format - set the latency output format
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* @tep: a handle to the tep_handle
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* @lat: non zero for latency output format
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*
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* This sets the latency output format
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*/
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void tep_set_latency_format(struct tep_handle *tep, int lat)
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{
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if (tep)
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tep->latency_format = lat;
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}
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/**
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* tep_is_old_format - get if an old kernel is used
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* @tep: a handle to the tep_handle
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@ -344,19 +317,6 @@ bool tep_is_old_format(struct tep_handle *tep)
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return false;
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}
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/**
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* tep_set_print_raw - set a flag to force print in raw format
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* @tep: a handle to the tep_handle
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* @print_raw: the new value of the print_raw flag
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*
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* This sets a flag to force print in raw format
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*/
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void tep_set_print_raw(struct tep_handle *tep, int print_raw)
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{
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if (tep)
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tep->print_raw = print_raw;
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}
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/**
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* tep_set_test_filters - set a flag to test a filter string
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* @tep: a handle to the tep_handle
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@ -28,8 +28,6 @@ struct tep_handle {
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enum tep_endian file_bigendian;
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enum tep_endian host_bigendian;
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int latency_format;
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int old_format;
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int cpus;
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@ -70,8 +68,6 @@ struct tep_handle {
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int ld_offset;
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int ld_size;
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int print_raw;
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int test_filters;
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int flags;
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@ -5212,24 +5212,20 @@ out_failed:
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}
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}
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/**
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* tep_data_latency_format - parse the data for the latency format
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* @tep: a handle to the trace event parser context
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* @s: the trace_seq to write to
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* @record: the record to read from
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*
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/*
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* This parses out the Latency format (interrupts disabled,
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* need rescheduling, in hard/soft interrupt, preempt count
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* and lock depth) and places it into the trace_seq.
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*/
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void tep_data_latency_format(struct tep_handle *tep,
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struct trace_seq *s, struct tep_record *record)
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static void data_latency_format(struct tep_handle *tep, struct trace_seq *s,
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char *format, struct tep_record *record)
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{
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static int check_lock_depth = 1;
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static int check_migrate_disable = 1;
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static int lock_depth_exists;
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static int migrate_disable_exists;
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unsigned int lat_flags;
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struct trace_seq sq;
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unsigned int pc;
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int lock_depth = 0;
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int migrate_disable = 0;
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@ -5237,6 +5233,7 @@ void tep_data_latency_format(struct tep_handle *tep,
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int softirq;
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void *data = record->data;
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trace_seq_init(&sq);
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lat_flags = parse_common_flags(tep, data);
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pc = parse_common_pc(tep, data);
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/* lock_depth may not always exist */
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@ -5264,7 +5261,7 @@ void tep_data_latency_format(struct tep_handle *tep,
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hardirq = lat_flags & TRACE_FLAG_HARDIRQ;
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softirq = lat_flags & TRACE_FLAG_SOFTIRQ;
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trace_seq_printf(s, "%c%c%c",
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trace_seq_printf(&sq, "%c%c%c",
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(lat_flags & TRACE_FLAG_IRQS_OFF) ? 'd' :
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(lat_flags & TRACE_FLAG_IRQS_NOSUPPORT) ?
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'X' : '.',
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@ -5274,24 +5271,32 @@ void tep_data_latency_format(struct tep_handle *tep,
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hardirq ? 'h' : softirq ? 's' : '.');
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if (pc)
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trace_seq_printf(s, "%x", pc);
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trace_seq_printf(&sq, "%x", pc);
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else
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trace_seq_putc(s, '.');
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trace_seq_printf(&sq, ".");
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if (migrate_disable_exists) {
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if (migrate_disable < 0)
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trace_seq_putc(s, '.');
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trace_seq_printf(&sq, ".");
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else
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trace_seq_printf(s, "%d", migrate_disable);
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trace_seq_printf(&sq, "%d", migrate_disable);
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}
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if (lock_depth_exists) {
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if (lock_depth < 0)
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trace_seq_putc(s, '.');
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trace_seq_printf(&sq, ".");
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else
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trace_seq_printf(s, "%d", lock_depth);
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trace_seq_printf(&sq, "%d", lock_depth);
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}
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if (sq.state == TRACE_SEQ__MEM_ALLOC_FAILED) {
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s->state = TRACE_SEQ__MEM_ALLOC_FAILED;
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return;
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}
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trace_seq_terminate(&sq);
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trace_seq_puts(s, sq.buffer);
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trace_seq_destroy(&sq);
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trace_seq_terminate(s);
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}
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@ -5452,21 +5457,16 @@ int tep_cmdline_pid(struct tep_handle *tep, struct tep_cmdline *cmdline)
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return cmdline->pid;
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}
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/**
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* tep_event_info - parse the data into the print format
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* @s: the trace_seq to write to
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* @event: the handle to the event
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* @record: the record to read from
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*
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/*
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* This parses the raw @data using the given @event information and
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* writes the print format into the trace_seq.
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*/
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void tep_event_info(struct trace_seq *s, struct tep_event *event,
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struct tep_record *record)
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static void print_event_info(struct trace_seq *s, char *format, bool raw,
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struct tep_event *event, struct tep_record *record)
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{
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int print_pretty = 1;
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if (event->tep->print_raw || (event->flags & TEP_EVENT_FL_PRINTRAW))
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if (raw || (event->flags & TEP_EVENT_FL_PRINTRAW))
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tep_print_fields(s, record->data, record->size, event);
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else {
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@ -5481,20 +5481,6 @@ void tep_event_info(struct trace_seq *s, struct tep_event *event,
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trace_seq_terminate(s);
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}
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static bool is_timestamp_in_us(char *trace_clock, bool use_trace_clock)
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{
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if (!trace_clock || !use_trace_clock)
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return true;
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if (!strcmp(trace_clock, "local") || !strcmp(trace_clock, "global")
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|| !strcmp(trace_clock, "uptime") || !strcmp(trace_clock, "perf")
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|| !strncmp(trace_clock, "mono", 4))
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return true;
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/* trace_clock is setting in tsc or counter mode */
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return false;
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}
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/**
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* tep_find_event_by_record - return the event from a given record
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* @tep: a handle to the trace event parser context
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@ -5518,129 +5504,195 @@ tep_find_event_by_record(struct tep_handle *tep, struct tep_record *record)
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return tep_find_event(tep, type);
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}
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/**
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* tep_print_event_task - Write the event task comm, pid and CPU
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* @tep: a handle to the trace event parser context
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* @s: the trace_seq to write to
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* @event: the handle to the record's event
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* @record: The record to get the event from
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*
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* Writes the tasks comm, pid and CPU to @s.
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/*
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* Writes the timestamp of the record into @s. Time divisor and precision can be
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* specified as part of printf @format string. Example:
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* "%3.1000d" - divide the time by 1000 and print the first 3 digits
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* before the dot. Thus, the timestamp "123456000" will be printed as
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* "123.456"
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*/
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void tep_print_event_task(struct tep_handle *tep, struct trace_seq *s,
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struct tep_event *event,
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struct tep_record *record)
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static void print_event_time(struct tep_handle *tep, struct trace_seq *s,
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char *format, struct tep_event *event,
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struct tep_record *record)
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{
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unsigned long long time;
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char *divstr;
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int prec = 0, pr;
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int div = 0;
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int p10 = 1;
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if (isdigit(*(format + 1)))
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prec = atoi(format + 1);
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divstr = strchr(format, '.');
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if (divstr && isdigit(*(divstr + 1)))
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div = atoi(divstr + 1);
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time = record->ts;
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if (div)
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time /= div;
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pr = prec;
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while (pr--)
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p10 *= 10;
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if (p10 > 1 && p10 < time)
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trace_seq_printf(s, "%5llu.%0*llu", time / p10, prec, time % p10);
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else
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trace_seq_printf(s, "%12llu\n", time);
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}
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struct print_event_type {
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enum {
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EVENT_TYPE_INT = 1,
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EVENT_TYPE_STRING,
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EVENT_TYPE_UNKNOWN,
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} type;
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char format[32];
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};
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static void print_string(struct tep_handle *tep, struct trace_seq *s,
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struct tep_record *record, struct tep_event *event,
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const char *arg, struct print_event_type *type)
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{
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void *data = record->data;
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const char *comm;
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int pid;
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pid = parse_common_pid(tep, data);
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comm = find_cmdline(tep, pid);
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if (tep->latency_format)
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trace_seq_printf(s, "%8.8s-%-5d %3d", comm, pid, record->cpu);
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else
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trace_seq_printf(s, "%16s-%-5d [%03d]", comm, pid, record->cpu);
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}
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/**
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* tep_print_event_time - Write the event timestamp
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* @tep: a handle to the trace event parser context
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* @s: the trace_seq to write to
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* @event: the handle to the record's event
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* @record: The record to get the event from
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* @use_trace_clock: Set to parse according to the @tep->trace_clock
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*
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* Writes the timestamp of the record into @s.
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*/
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void tep_print_event_time(struct tep_handle *tep, struct trace_seq *s,
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struct tep_event *event,
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struct tep_record *record,
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bool use_trace_clock)
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{
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unsigned long secs;
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unsigned long usecs;
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unsigned long nsecs;
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int p;
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bool use_usec_format;
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use_usec_format = is_timestamp_in_us(tep->trace_clock, use_trace_clock);
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if (use_usec_format) {
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secs = record->ts / NSEC_PER_SEC;
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nsecs = record->ts - secs * NSEC_PER_SEC;
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if (strncmp(arg, TEP_PRINT_LATENCY, strlen(TEP_PRINT_LATENCY)) == 0) {
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data_latency_format(tep, s, type->format, record);
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} else if (strncmp(arg, TEP_PRINT_COMM, strlen(TEP_PRINT_COMM)) == 0) {
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pid = parse_common_pid(tep, record->data);
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comm = find_cmdline(tep, pid);
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trace_seq_printf(s, type->format, comm);
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} else if (strncmp(arg, TEP_PRINT_INFO_RAW, strlen(TEP_PRINT_INFO_RAW)) == 0) {
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print_event_info(s, type->format, true, event, record);
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} else if (strncmp(arg, TEP_PRINT_INFO, strlen(TEP_PRINT_INFO)) == 0) {
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print_event_info(s, type->format, false, event, record);
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} else if (strncmp(arg, TEP_PRINT_NAME, strlen(TEP_PRINT_NAME)) == 0) {
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trace_seq_printf(s, type->format, event->name);
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} else {
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trace_seq_printf(s, "[UNKNOWN TEP TYPE %s]", arg);
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}
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if (tep->latency_format) {
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tep_data_latency_format(tep, s, record);
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}
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if (use_usec_format) {
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if (tep->flags & TEP_NSEC_OUTPUT) {
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usecs = nsecs;
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p = 9;
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} else {
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usecs = (nsecs + 500) / NSEC_PER_USEC;
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/* To avoid usecs larger than 1 sec */
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if (usecs >= USEC_PER_SEC) {
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usecs -= USEC_PER_SEC;
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secs++;
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}
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p = 6;
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}
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trace_seq_printf(s, " %5lu.%0*lu:", secs, p, usecs);
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} else
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trace_seq_printf(s, " %12llu:", record->ts);
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}
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/**
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* tep_print_event_data - Write the event data section
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* @tep: a handle to the trace event parser context
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* @s: the trace_seq to write to
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* @event: the handle to the record's event
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* @record: The record to get the event from
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*
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* Writes the parsing of the record's data to @s.
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*/
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void tep_print_event_data(struct tep_handle *tep, struct trace_seq *s,
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struct tep_event *event,
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struct tep_record *record)
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static void print_int(struct tep_handle *tep, struct trace_seq *s,
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struct tep_record *record, struct tep_event *event,
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int arg, struct print_event_type *type)
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{
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static const char *spaces = " "; /* 20 spaces */
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int len;
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int param;
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trace_seq_printf(s, " %s: ", event->name);
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/* Space out the event names evenly. */
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len = strlen(event->name);
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if (len < 20)
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trace_seq_printf(s, "%.*s", 20 - len, spaces);
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tep_event_info(s, event, record);
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}
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void tep_print_event(struct tep_handle *tep, struct trace_seq *s,
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struct tep_record *record, bool use_trace_clock)
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{
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struct tep_event *event;
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event = tep_find_event_by_record(tep, record);
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if (!event) {
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int i;
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int type = trace_parse_common_type(tep, record->data);
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do_warning("ug! no event found for type %d", type);
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trace_seq_printf(s, "[UNKNOWN TYPE %d]", type);
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for (i = 0; i < record->size; i++)
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trace_seq_printf(s, " %02x",
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((unsigned char *)record->data)[i]);
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switch (arg) {
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case TEP_PRINT_CPU:
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param = record->cpu;
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break;
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case TEP_PRINT_PID:
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param = parse_common_pid(tep, record->data);
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break;
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case TEP_PRINT_TIME:
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return print_event_time(tep, s, type->format, event, record);
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default:
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return;
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}
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trace_seq_printf(s, type->format, param);
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}
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tep_print_event_task(tep, s, event, record);
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tep_print_event_time(tep, s, event, record, use_trace_clock);
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tep_print_event_data(tep, s, event, record);
|
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static int tep_print_event_param_type(char *format,
|
||||
struct print_event_type *type)
|
||||
{
|
||||
char *str = format + 1;
|
||||
int i = 1;
|
||||
|
||||
type->type = EVENT_TYPE_UNKNOWN;
|
||||
while (*str) {
|
||||
switch (*str) {
|
||||
case 'd':
|
||||
case 'u':
|
||||
case 'i':
|
||||
case 'x':
|
||||
case 'X':
|
||||
case 'o':
|
||||
type->type = EVENT_TYPE_INT;
|
||||
break;
|
||||
case 's':
|
||||
type->type = EVENT_TYPE_STRING;
|
||||
break;
|
||||
}
|
||||
str++;
|
||||
i++;
|
||||
if (type->type != EVENT_TYPE_UNKNOWN)
|
||||
break;
|
||||
}
|
||||
memset(type->format, 0, 32);
|
||||
memcpy(type->format, format, i < 32 ? i : 31);
|
||||
return i;
|
||||
}
|
||||
|
||||
/**
|
||||
* tep_print_event - Write various event information
|
||||
* @tep: a handle to the trace event parser context
|
||||
* @s: the trace_seq to write to
|
||||
* @record: The record to get the event from
|
||||
* @format: a printf format string. Supported event fileds:
|
||||
* 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. If any width is specified in
|
||||
* the format string, the event information will be printed
|
||||
* in raw format.
|
||||
* Writes the specified event information into @s.
|
||||
*/
|
||||
void tep_print_event(struct tep_handle *tep, struct trace_seq *s,
|
||||
struct tep_record *record, const char *fmt, ...)
|
||||
{
|
||||
struct print_event_type type;
|
||||
char *format = strdup(fmt);
|
||||
char *current = format;
|
||||
char *str = format;
|
||||
int offset;
|
||||
va_list args;
|
||||
struct tep_event *event;
|
||||
|
||||
if (!format)
|
||||
return;
|
||||
|
||||
event = tep_find_event_by_record(tep, record);
|
||||
va_start(args, fmt);
|
||||
while (*current) {
|
||||
current = strchr(str, '%');
|
||||
if (!current) {
|
||||
trace_seq_puts(s, str);
|
||||
break;
|
||||
}
|
||||
memset(&type, 0, sizeof(type));
|
||||
offset = tep_print_event_param_type(current, &type);
|
||||
*current = '\0';
|
||||
trace_seq_puts(s, str);
|
||||
current += offset;
|
||||
switch (type.type) {
|
||||
case EVENT_TYPE_STRING:
|
||||
print_string(tep, s, record, event,
|
||||
va_arg(args, char*), &type);
|
||||
break;
|
||||
case EVENT_TYPE_INT:
|
||||
print_int(tep, s, record, event,
|
||||
va_arg(args, int), &type);
|
||||
break;
|
||||
case EVENT_TYPE_UNKNOWN:
|
||||
default:
|
||||
trace_seq_printf(s, "[UNKNOWN TYPE]");
|
||||
break;
|
||||
}
|
||||
str = current;
|
||||
|
||||
}
|
||||
va_end(args);
|
||||
free(format);
|
||||
}
|
||||
|
||||
static int events_id_cmp(const void *a, const void *b)
|
||||
|
||||
@ -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);
|
||||
|
||||
@ -750,7 +750,8 @@ static int parse_gfp_flags(struct evsel *evsel, struct perf_sample *sample,
|
||||
}
|
||||
|
||||
trace_seq_init(&seq);
|
||||
tep_event_info(&seq, evsel->tp_format, &record);
|
||||
tep_print_event(evsel->tp_format->tep,
|
||||
&seq, &record, "%s", TEP_PRINT_INFO);
|
||||
|
||||
str = strtok_r(seq.buffer, " ", &pos);
|
||||
while (str) {
|
||||
|
||||
@ -709,7 +709,8 @@ static char *get_trace_output(struct hist_entry *he)
|
||||
tep_print_fields(&seq, he->raw_data, he->raw_size,
|
||||
evsel->tp_format);
|
||||
} else {
|
||||
tep_event_info(&seq, evsel->tp_format, &rec);
|
||||
tep_print_event(evsel->tp_format->tep,
|
||||
&seq, &rec, "%s", TEP_PRINT_INFO);
|
||||
}
|
||||
/*
|
||||
* Trim the buffer, it starts at 4KB and we're not going to
|
||||
|
||||
@ -109,7 +109,7 @@ void event_format__fprintf(struct tep_event *event,
|
||||
record.data = data;
|
||||
|
||||
trace_seq_init(&s);
|
||||
tep_event_info(&s, event, &record);
|
||||
tep_print_event(event->tep, &s, &record, "%s", TEP_PRINT_INFO);
|
||||
trace_seq_do_fprintf(&s, fp);
|
||||
trace_seq_destroy(&s);
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user