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perf annotate: Add symbol__calc_percent function 

Add symbol__calc_percent function, that calculates annotation data for
symbol and put the data in the struct annotation_line::samples array.

Committer notes:

Made symbol__calc_percent non static to be used in the next two patches,
which will get some fixups from jolsa, doing it this way to keep this
bisectable.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20171011150158.11895-18-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jiri Olsa 2017-10-11 17:01:40 +02:00 committed by Arnaldo Carvalho de Melo
parent 7e304557ea
commit 073ae601ed
2 changed files with 62 additions and 1 deletions
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62
tools/perf/util/annotate.c
View File

@ -1628,6 +1628,62 @@ static int symbol__disassemble(struct symbol *sym, struct annotate_args *args)
goto out_remove_tmp;
}
static void calc_percent(struct sym_hist *hist,
struct annotation_data *sample,
s64 offset, s64 end)
{
unsigned int hits = 0;
u64 period = 0;
while (offset < end) {
hits += hist->addr[offset].nr_samples;
period += hist->addr[offset].period;
++offset;
}
if (hist->nr_samples) {
sample->he.period = period;
sample->he.nr_samples = hits;
sample->percent = 100.0 * hits / hist->nr_samples;
}
}
static int annotation__calc_percent(struct annotation *notes,
struct perf_evsel *evsel, s64 len)
{
struct annotation_line *al, *next;
list_for_each_entry(al, &notes->src->source, node) {
s64 end;
int i;
if (al->offset == -1)
continue;
next = annotation_line__next(al, &notes->src->source);
end = next ? next->offset : len;
for (i = 0; i < al->samples_nr; i++) {
struct annotation_data *sample;
struct sym_hist *hist;
hist = annotation__histogram(notes, evsel->idx + i);
sample = &al->samples[i];
calc_percent(hist, sample, al->offset, end);
}
}
return 0;
}
int symbol__calc_percent(struct symbol *sym, struct perf_evsel *evsel)
{
struct annotation *notes = symbol__annotation(sym);
return annotation__calc_percent(notes, evsel, symbol__size(sym));
}
int symbol__annotate(struct symbol *sym, struct map *map,
struct perf_evsel *evsel, size_t privsize,
struct arch **parch, char *cpuid)
@ -1663,7 +1719,11 @@ int symbol__annotate(struct symbol *sym, struct map *map,
}
}
return symbol__disassemble(sym, &args);
err = symbol__disassemble(sym, &args);
if (err)
return err;
return symbol__calc_percent(sym, evsel);
}
static void insert_source_line(struct rb_root *root, struct source_line *src_line)

1
tools/perf/util/annotate.h
View File

@ -107,6 +107,7 @@ int disasm_line__scnprintf(struct disasm_line *dl, char *bf, size_t size, bool r
size_t disasm__fprintf(struct list_head *head, FILE *fp);
double disasm__calc_percent(struct annotation *notes, int evidx, s64 offset,
s64 end, const char **path, struct sym_hist_entry *sample);
int symbol__calc_percent(struct symbol *sym, struct perf_evsel *evsel);
struct sym_hist {
u64 nr_samples;