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perf kvm: Add dimensions for percentages

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Add dimensions for count and time percentages, it would be useful for
user to review percentage statistics.

Reviewed-by: James Clark <james.clark@arm.com>
Signed-off-by: Leo Yan <leo.yan@linaro.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: linux-arm-kernel@lists.infradead.org
Link: https://lore.kernel.org/r/20230315145112.186603-2-leo.yan@linaro.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Leo Yan 2023-03-15 22:51:10 +08:00 committed by Arnaldo Carvalho de Melo
parent fbb70bd310
commit 32a5c2b842
1 changed files with 97 additions and 1 deletions
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98
tools/perf/builtin-kvm.c
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@ -223,10 +223,105 @@ static struct kvm_dimension dim_mean_time = {
.width = 14,
};
#define PERC_STR(__s, __v) \
({ \
scnprintf(__s, sizeof(__s), "%.2F%%", __v); \
__s; \
})
static double percent(u64 st, u64 tot)
{
return tot ? 100. * (double) st / (double) tot : 0;
}
#define EV_METRIC_PERCENT(metric) \
static int ev_percent_##metric(struct hist_entry *he) \
{ \
struct kvm_event *event; \
struct perf_kvm_stat *perf_kvm; \
\
event = container_of(he, struct kvm_event, he); \
perf_kvm = event->perf_kvm; \
\
return percent(get_event_##metric(event, perf_kvm->trace_vcpu), \
perf_kvm->total_##metric); \
}
EV_METRIC_PERCENT(time)
EV_METRIC_PERCENT(count)
static int ev_entry_time_precent(struct perf_hpp_fmt *fmt,
struct perf_hpp *hpp,
struct hist_entry *he)
{
int width = fmt_width(fmt, hpp, he->hists);
double per;
char buf[10];
per = ev_percent_time(he);
return scnprintf(hpp->buf, hpp->size, "%*s", width, PERC_STR(buf, per));
}
static int64_t
ev_cmp_time_precent(struct perf_hpp_fmt *fmt __maybe_unused,
struct hist_entry *left, struct hist_entry *right)
{
double per_left;
double per_right;
per_left = ev_percent_time(left);
per_right = ev_percent_time(right);
return per_left - per_right;
}
static struct kvm_dimension dim_time_percent = {
.header = "Time%",
.name = "percent_time",
.cmp = ev_cmp_time_precent,
.entry = ev_entry_time_precent,
.width = 12,
};
static int ev_entry_count_precent(struct perf_hpp_fmt *fmt,
struct perf_hpp *hpp,
struct hist_entry *he)
{
int width = fmt_width(fmt, hpp, he->hists);
double per;
char buf[10];
per = ev_percent_count(he);
return scnprintf(hpp->buf, hpp->size, "%*s", width, PERC_STR(buf, per));
}
static int64_t
ev_cmp_count_precent(struct perf_hpp_fmt *fmt __maybe_unused,
struct hist_entry *left, struct hist_entry *right)
{
double per_left;
double per_right;
per_left = ev_percent_count(left);
per_right = ev_percent_count(right);
return per_left - per_right;
}
static struct kvm_dimension dim_count_percent = {
.header = "Sample%",
.name = "percent_sample",
.cmp = ev_cmp_count_precent,
.entry = ev_entry_count_precent,
.width = 12,
};
static struct kvm_dimension *dimensions[] = {
&dim_event,
&dim_time,
&dim_time_percent,
&dim_count,
&dim_count_percent,
&dim_max_time,
&dim_min_time,
&dim_mean_time,
@ -877,7 +972,8 @@ static int filter_cb(struct hist_entry *he, void *arg __maybe_unused)
static void sort_result(struct perf_kvm_stat *kvm)
{
const char *output_columns = "ev_name,sample,time,max_t,min_t,mean_t";
const char *output_columns = "ev_name,sample,percent_sample,"
"time,percent_time,max_t,min_t,mean_t";
kvm_hists__reinit(output_columns, kvm->sort_key);
hists__collapse_resort(&kvm_hists.hists, NULL);