Skip to content

Commit

Permalink
perf diff: Change compute methods to work with pair directly
Browse files Browse the repository at this point in the history 
Changing compute methods to operate over hist entry and its pair
directly. This makes the code more obvious and readable, instead of all
time checking for pair being != NULL.

Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1354110769-2998-6-git-send-email-jolsa@redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
  • Loading branch information
Jiri Olsa authored and Arnaldo Carvalho de Melo committed Dec 9, 2012
1 parent fa283ad commit 05472da
Show file tree
Hide file tree
Showing 3 changed files with 46 additions and 39 deletions.
38 changes: 17 additions & 21 deletions tools/perf/builtin-diff.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -146,47 +146,40 @@ static int setup_compute(const struct option *opt, const char *str,
return -EINVAL;
}

static double get_period_percent(struct hist_entry *he, u64 period)
double perf_diff__period_percent(struct hist_entry *he, u64 period)
{
u64 total = he->hists->stats.total_period;
return (period * 100.0) / total;
}

double perf_diff__compute_delta(struct hist_entry *he)
double perf_diff__compute_delta(struct hist_entry *he, struct hist_entry *pair)
{
struct hist_entry *pair = hist_entry__next_pair(he);
double new_percent = get_period_percent(he, he->stat.period);
double old_percent = pair ? get_period_percent(pair, pair->stat.period) : 0.0;
double new_percent = perf_diff__period_percent(he, he->stat.period);
double old_percent = perf_diff__period_percent(pair, pair->stat.period);

he->diff.period_ratio_delta = new_percent - old_percent;
he->diff.computed = true;
return he->diff.period_ratio_delta;
}

double perf_diff__compute_ratio(struct hist_entry *he)
double perf_diff__compute_ratio(struct hist_entry *he, struct hist_entry *pair)
{
struct hist_entry *pair = hist_entry__next_pair(he);
double new_period = he->stat.period;
double old_period = pair ? pair->stat.period : 0;
double old_period = pair->stat.period;

he->diff.computed = true;
he->diff.period_ratio = pair ? (new_period / old_period) : 0;
he->diff.period_ratio = new_period / old_period;
return he->diff.period_ratio;
}

s64 perf_diff__compute_wdiff(struct hist_entry *he)
s64 perf_diff__compute_wdiff(struct hist_entry *he, struct hist_entry *pair)
{
struct hist_entry *pair = hist_entry__next_pair(he);
u64 new_period = he->stat.period;
u64 old_period = pair ? pair->stat.period : 0;
u64 old_period = pair->stat.period;

he->diff.computed = true;

if (!pair)
he->diff.wdiff = 0;
else
he->diff.wdiff = new_period * compute_wdiff_w2 -
old_period * compute_wdiff_w1;
he->diff.wdiff = new_period * compute_wdiff_w2 -
old_period * compute_wdiff_w1;

return he->diff.wdiff;
}
Expand Down Expand Up @@ -385,18 +378,21 @@ static void hists__precompute(struct hists *hists)

while (next != NULL) {
struct hist_entry *he = rb_entry(next, struct hist_entry, rb_node);
struct hist_entry *pair = hist_entry__next_pair(he);

next = rb_next(&he->rb_node);
if (!pair)
continue;

switch (compute) {
case COMPUTE_DELTA:
perf_diff__compute_delta(he);
perf_diff__compute_delta(he, pair);
break;
case COMPUTE_RATIO:
perf_diff__compute_ratio(he);
perf_diff__compute_ratio(he, pair);
break;
case COMPUTE_WEIGHTED_DIFF:
perf_diff__compute_wdiff(he);
perf_diff__compute_wdiff(he, pair);
break;
default:
BUG_ON(1);
Expand Down
40 changes: 25 additions & 15 deletions tools/perf/ui/hist.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -268,14 +268,18 @@ static int hpp__width_delta(struct perf_hpp *hpp __maybe_unused)

static int hpp__entry_delta(struct perf_hpp *hpp, struct hist_entry *he)
{
struct hist_entry *pair = hist_entry__next_pair(he);
const char *fmt = symbol_conf.field_sep ? "%s" : "%7.7s";
char buf[32] = " ";
double diff;
double diff = 0.0;

if (he->diff.computed)
diff = he->diff.period_ratio_delta;
else
diff = perf_diff__compute_delta(he);
if (pair) {
if (he->diff.computed)
diff = he->diff.period_ratio_delta;
else
diff = perf_diff__compute_delta(he, pair);
} else
diff = perf_diff__period_percent(he, he->stat.period);

if (fabs(diff) >= 0.01)
scnprintf(buf, sizeof(buf), "%+4.2F%%", diff);
Expand All @@ -297,14 +301,17 @@ static int hpp__width_ratio(struct perf_hpp *hpp __maybe_unused)

static int hpp__entry_ratio(struct perf_hpp *hpp, struct hist_entry *he)
{
struct hist_entry *pair = hist_entry__next_pair(he);
const char *fmt = symbol_conf.field_sep ? "%s" : "%14s";
char buf[32] = " ";
double ratio;
double ratio = 0.0;

if (he->diff.computed)
ratio = he->diff.period_ratio;
else
ratio = perf_diff__compute_ratio(he);
if (pair) {
if (he->diff.computed)
ratio = he->diff.period_ratio;
else
ratio = perf_diff__compute_ratio(he, pair);
}

if (ratio > 0.0)
scnprintf(buf, sizeof(buf), "%+14.6F", ratio);
Expand All @@ -326,14 +333,17 @@ static int hpp__width_wdiff(struct perf_hpp *hpp __maybe_unused)

static int hpp__entry_wdiff(struct perf_hpp *hpp, struct hist_entry *he)
{
struct hist_entry *pair = hist_entry__next_pair(he);
const char *fmt = symbol_conf.field_sep ? "%s" : "%14s";
char buf[32] = " ";
s64 wdiff;
s64 wdiff = 0;

if (he->diff.computed)
wdiff = he->diff.wdiff;
else
wdiff = perf_diff__compute_wdiff(he);
if (pair) {
if (he->diff.computed)
wdiff = he->diff.wdiff;
else
wdiff = perf_diff__compute_wdiff(he, pair);
}

if (wdiff != 0)
scnprintf(buf, sizeof(buf), "%14ld", wdiff);
Expand Down
7 changes: 4 additions & 3 deletions tools/perf/util/hist.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -226,8 +226,9 @@ int perf_evlist__gtk_browse_hists(struct perf_evlist *evlist __maybe_unused,

unsigned int hists__sort_list_width(struct hists *self);

double perf_diff__compute_delta(struct hist_entry *he);
double perf_diff__compute_ratio(struct hist_entry *he);
s64 perf_diff__compute_wdiff(struct hist_entry *he);
double perf_diff__compute_delta(struct hist_entry *he, struct hist_entry *pair);
double perf_diff__compute_ratio(struct hist_entry *he, struct hist_entry *pair);
s64 perf_diff__compute_wdiff(struct hist_entry *he, struct hist_entry *pair);
int perf_diff__formula(char *buf, size_t size, struct hist_entry *he);
double perf_diff__period_percent(struct hist_entry *he, u64 period);
#endif /* __PERF_HIST_H */

0 comments on commit 05472da

Please sign in to comment.