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perf annotate: Introduce annotation__scnprintf_samples_period() method

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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: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2018-04-03 15:19:47 -03:00
parent ef9ff6017e
commit b213eac245
2 changed files with 50 additions and 0 deletions
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38
tools/perf/util/annotate.c
View file

@ -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, }