Commit b213eac2 authored by Arnaldo Carvalho de Melo's avatar Arnaldo Carvalho de Melo
Browse files

perf annotate: Introduce annotation__scnprintf_samples_period() method 

To print a string using the total period (nr_events) and the number of
samples for a given annotation, i.e. for a given symbol, the counterpart
to hists__scnprintf_samples_period(), that is for all the samples in a
session (be it a live session, think 'perf top' or a perf.data file,
think 'perf report').

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Martin Liška <mliska@suse.cz>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=196935
Link: https://lkml.kernel.org/n/tip-goj2wu4fxutc8vd46mw3yg14@git.kernel.org


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent ef9ff601

tools/perf/util/annotate.c

+38 −0
Original line number Diff line number Diff line
@@ -17,6 +17,7 @@ 
#include "config.h"

#include "cache.h"

#include "symbol.h"

#include "units.h"

#include "debug.h"

#include "annotate.h"

#include "evsel.h"
@@ -2597,6 +2598,43 @@ out_free_offsets: 
	return -1;

}



int __annotation__scnprintf_samples_period(struct annotation *notes,

					   char *bf, size_t size,

					   struct perf_evsel *evsel,

					   bool show_freq)

{

	const char *ev_name = perf_evsel__name(evsel);

	char ref[30] = " show reference callgraph, ";

	char sample_freq_str[64] = "";

	unsigned long nr_samples = 0;

	int nr_members = 1;

	bool enable_ref = false;

	u64 nr_events = 0;

	char unit;

	int i;



	if (perf_evsel__is_group_event(evsel))

                nr_members = evsel->nr_members;



	for (i = 0; i < nr_members; i++) {

		struct sym_hist *ah = annotation__histogram(notes, evsel->idx + i);



		nr_samples += ah->nr_samples;

		nr_events  += ah->period;

	}



	if (symbol_conf.show_ref_callgraph && strstr(ev_name, "call-graph=no"))

		enable_ref = true;



	if (show_freq)

		scnprintf(sample_freq_str, sizeof(sample_freq_str), " %d Hz,", evsel->attr.sample_freq);



	nr_samples = convert_unit(nr_samples, &unit);

	return scnprintf(bf, size, "Samples: %lu%c of event%s '%s',%s%sEvent count (approx.): %" PRIu64,

			 nr_samples, unit, evsel->nr_members > 1 ? "s" : "",

			 ev_name, sample_freq_str, enable_ref ? ref : " ", nr_events);

}



#define ANNOTATION__CFG(n) \

	{ .name = #n, .value = &annotation__default_options.n, }

tools/perf/util/annotate.h

+12 −0
Original line number Diff line number Diff line
@@ -151,6 +151,18 @@ double annotation_line__max_percent(struct annotation_line *al, struct annotatio 
void annotation_line__write(struct annotation_line *al, struct annotation *notes,

			    struct annotation_write_ops *ops);



int __annotation__scnprintf_samples_period(struct annotation *notes,

					   char *bf, size_t size,

					   struct perf_evsel *evsel,

					   bool show_freq);



static inline int annotation__scnprintf_samples_period(struct annotation *notes,

						       char *bf, size_t size,

						       struct perf_evsel *evsel)

{

	return __annotation__scnprintf_samples_period(notes, bf, size, evsel, true);

}



int disasm_line__scnprintf(struct disasm_line *dl, char *bf, size_t size, bool raw);

size_t disasm__fprintf(struct list_head *head, FILE *fp);

void symbol__calc_percent(struct symbol *sym, struct perf_evsel *evsel);

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