[PATCH v1 2/2] perf stat: Support topdown with --all-kernel/--all-user
From: Jin Yao
Date: Tue Sep 24 2019 - 22:03:26 EST
When perf stat --topdown is enabled, the internal event list is expanded to:
"{topdown-total-slots,topdown-slots-retired,topdown-recovery-bubbles,topdown-fetch-bubbles,topdown-slots-issued}".
With this patch,
1. When --all-user is enabled, it's expanded to:
"{topdown-total-slots:u,topdown-slots-retired:u,topdown-recovery-bubbles:u,topdown-fetch-bubbles:u,topdown-slots-issued:u}"
2. When --all-kernel is enabled, it's expanded to:
"{topdown-total-slots:k,topdown-slots-retired:k,topdown-recovery-bubbles:k,topdown-fetch-bubbles:k,topdown-slots-issued:k}"
3. Both are enabled, it's expanded to:
"{topdown-total-slots:k,topdown-slots-retired:k,topdown-recovery-bubbles:k,topdown-fetch-bubbles:k,topdown-slots-issued:k},{topdown-total-slots:u,topdown-slots-retired:u,topdown-recovery-bubbles:u,topdown-fetch-bubbles:u,topdown-slots-issued:u}"
This patch creates new topdown stat type (STAT_TOPDOWN_XXX_K /
STAT_TOPDOWN_XXX_U), and save the event counting value to type
related entry in runtime_stat rblist.
For example,
root@kbl:~# perf stat -a --topdown --all-kernel -- sleep 1
Performance counter stats for 'system wide':
retiring:k bad speculation:k frontend bound:k backend bound:k
S0-D0-C0 2 7.6% 1.8% 40.5% 50.0%
S0-D0-C1 2 15.4% 3.4% 14.4% 66.8%
S0-D0-C2 2 15.8% 5.1% 26.9% 52.2%
S0-D0-C3 2 5.7% 5.7% 46.2% 42.4%
1.000771709 seconds time elapsed
root@kbl:~# perf stat -a --topdown --all-user -- sleep 1
Performance counter stats for 'system wide':
retiring:u bad speculation:u frontend bound:u backend bound:u
S0-D0-C0 2 0.5% 0.0% 0.0% 99.4%
S0-D0-C1 2 5.7% 5.8% 77.7% 10.7%
S0-D0-C2 2 15.5% 20.5% 35.8% 28.2%
S0-D0-C3 2 14.1% 0.5% 1.5% 83.9%
1.000773028 seconds time elapsed
Signed-off-by: Jin Yao <yao.jin@xxxxxxxxxxxxxxx>
---
tools/perf/builtin-stat.c | 37 +++++++-
tools/perf/util/stat-shadow.c | 167 +++++++++++++++++++++++++---------
tools/perf/util/stat.h | 12 +++
3 files changed, 171 insertions(+), 45 deletions(-)
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index 7f4d22b00d04..b766293b9a15 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -1436,7 +1436,8 @@ static int add_default_attributes(void)
if (topdown_run) {
char *str = NULL;
- bool warn = false;
+ bool warn = false, append_uk = false;
+ struct strbuf new_str;
if (stat_config.aggr_mode != AGGR_GLOBAL &&
stat_config.aggr_mode != AGGR_CORE) {
@@ -1457,6 +1458,21 @@ static int add_default_attributes(void)
return -1;
}
if (topdown_attrs[0] && str) {
+ int ret;
+
+ if (stat_config.all_kernel || stat_config.all_user) {
+ ret = append_modifier(&new_str, str,
+ stat_config.all_kernel,
+ stat_config.all_user);
+ if (ret)
+ return ret;
+
+ free(str);
+ str = strbuf_detach(&new_str, NULL);
+ strbuf_release(&new_str);
+ append_uk = true;
+ }
+
if (warn)
arch_topdown_group_warn();
err = parse_events(evsel_list, str, &errinfo);
@@ -1468,6 +1484,25 @@ static int add_default_attributes(void)
free(str);
return -1;
}
+
+ if (append_uk) {
+ struct evsel *evsel;
+ char *p;
+
+ evlist__for_each_entry(evsel_list, evsel) {
+ /*
+ * We appended the modifiers ":u"/":k"
+ * to evsel->name. Since the events have
+ * been parsed, remove the appended
+ * modifiers from event name here.
+ */
+ if (evsel->name) {
+ p = strchr(evsel->name, ':');
+ if (p)
+ *p = 0;
+ }
+ }
+ }
} else {
fprintf(stderr, "System does not support topdown\n");
return -1;
diff --git a/tools/perf/util/stat-shadow.c b/tools/perf/util/stat-shadow.c
index 70c87fdb2a43..013e0f772658 100644
--- a/tools/perf/util/stat-shadow.c
+++ b/tools/perf/util/stat-shadow.c
@@ -204,6 +204,24 @@ static void update_runtime_stat(struct runtime_stat *st,
update_stats(&v->stats, count);
}
+static void update_runtime_stat_uk(struct runtime_stat *st,
+ enum stat_type type,
+ int ctx, int cpu, u64 count,
+ struct evsel *counter, int type_off)
+{
+ struct perf_event_attr *attr = &counter->core.attr;
+
+ if (!attr->exclude_user && !attr->exclude_kernel)
+ update_runtime_stat(st, type, ctx, cpu, count);
+ else if (attr->exclude_user) {
+ update_runtime_stat(st, type + type_off,
+ ctx, cpu, count);
+ } else {
+ update_runtime_stat(st, type + type_off * 2,
+ ctx, cpu, count);
+ }
+}
+
/*
* Update various tracking values we maintain to print
* more semantic information such as miss/hit ratios,
@@ -229,20 +247,25 @@ void perf_stat__update_shadow_stats(struct evsel *counter, u64 count,
else if (perf_stat_evsel__is(counter, ELISION_START))
update_runtime_stat(st, STAT_ELISION, ctx, cpu, count);
else if (perf_stat_evsel__is(counter, TOPDOWN_TOTAL_SLOTS))
- update_runtime_stat(st, STAT_TOPDOWN_TOTAL_SLOTS,
- ctx, cpu, count);
+ update_runtime_stat_uk(st, STAT_TOPDOWN_TOTAL_SLOTS,
+ ctx, cpu, count, counter,
+ STAT_TOPDOWN_NUM);
else if (perf_stat_evsel__is(counter, TOPDOWN_SLOTS_ISSUED))
- update_runtime_stat(st, STAT_TOPDOWN_SLOTS_ISSUED,
- ctx, cpu, count);
+ update_runtime_stat_uk(st, STAT_TOPDOWN_SLOTS_ISSUED,
+ ctx, cpu, count, counter,
+ STAT_TOPDOWN_NUM);
else if (perf_stat_evsel__is(counter, TOPDOWN_SLOTS_RETIRED))
- update_runtime_stat(st, STAT_TOPDOWN_SLOTS_RETIRED,
- ctx, cpu, count);
+ update_runtime_stat_uk(st, STAT_TOPDOWN_SLOTS_RETIRED,
+ ctx, cpu, count, counter,
+ STAT_TOPDOWN_NUM);
else if (perf_stat_evsel__is(counter, TOPDOWN_FETCH_BUBBLES))
- update_runtime_stat(st, STAT_TOPDOWN_FETCH_BUBBLES,
- ctx, cpu, count);
+ update_runtime_stat_uk(st, STAT_TOPDOWN_FETCH_BUBBLES,
+ ctx, cpu, count, counter,
+ STAT_TOPDOWN_NUM);
else if (perf_stat_evsel__is(counter, TOPDOWN_RECOVERY_BUBBLES))
- update_runtime_stat(st, STAT_TOPDOWN_RECOVERY_BUBBLES,
- ctx, cpu, count);
+ update_runtime_stat_uk(st, STAT_TOPDOWN_RECOVERY_BUBBLES,
+ ctx, cpu, count, counter,
+ STAT_TOPDOWN_NUM);
else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_FRONTEND))
update_runtime_stat(st, STAT_STALLED_CYCLES_FRONT,
ctx, cpu, count);
@@ -410,6 +433,20 @@ static double runtime_stat_avg(struct runtime_stat *st,
return avg_stats(&v->stats);
}
+static double runtime_stat_avg_uk(struct runtime_stat *st,
+ enum stat_type type, int ctx, int cpu,
+ struct evsel *counter, int type_off)
+{
+ struct perf_event_attr *attr = &counter->core.attr;
+
+ if (!attr->exclude_user && !attr->exclude_kernel)
+ return runtime_stat_avg(st, type, ctx, cpu);
+ else if (attr->exclude_user)
+ return runtime_stat_avg(st, type + type_off, ctx, cpu);
+
+ return runtime_stat_avg(st, type + type_off * 2, ctx, cpu);
+}
+
static double runtime_stat_n(struct runtime_stat *st,
enum stat_type type, int ctx, int cpu)
{
@@ -639,56 +676,67 @@ static double sanitize_val(double x)
return x;
}
-static double td_total_slots(int ctx, int cpu, struct runtime_stat *st)
+static double td_total_slots(int ctx, int cpu, struct runtime_stat *st,
+ struct evsel *evsel)
{
- return runtime_stat_avg(st, STAT_TOPDOWN_TOTAL_SLOTS, ctx, cpu);
+ return runtime_stat_avg_uk(st, STAT_TOPDOWN_TOTAL_SLOTS, ctx, cpu,
+ evsel, STAT_TOPDOWN_NUM);
}
-static double td_bad_spec(int ctx, int cpu, struct runtime_stat *st)
+static double td_bad_spec(int ctx, int cpu, struct runtime_stat *st,
+ struct evsel *evsel)
{
double bad_spec = 0;
double total_slots;
double total;
- total = runtime_stat_avg(st, STAT_TOPDOWN_SLOTS_ISSUED, ctx, cpu) -
- runtime_stat_avg(st, STAT_TOPDOWN_SLOTS_RETIRED, ctx, cpu) +
- runtime_stat_avg(st, STAT_TOPDOWN_RECOVERY_BUBBLES, ctx, cpu);
+ total = runtime_stat_avg_uk(st, STAT_TOPDOWN_SLOTS_ISSUED, ctx, cpu,
+ evsel, STAT_TOPDOWN_NUM) -
+ runtime_stat_avg_uk(st, STAT_TOPDOWN_SLOTS_RETIRED, ctx, cpu,
+ evsel, STAT_TOPDOWN_NUM) +
+ runtime_stat_avg_uk(st, STAT_TOPDOWN_RECOVERY_BUBBLES, ctx, cpu,
+ evsel, STAT_TOPDOWN_NUM);
- total_slots = td_total_slots(ctx, cpu, st);
+ total_slots = td_total_slots(ctx, cpu, st, evsel);
if (total_slots)
bad_spec = total / total_slots;
return sanitize_val(bad_spec);
}
-static double td_retiring(int ctx, int cpu, struct runtime_stat *st)
+static double td_retiring(int ctx, int cpu, struct runtime_stat *st,
+ struct evsel *evsel)
{
double retiring = 0;
- double total_slots = td_total_slots(ctx, cpu, st);
- double ret_slots = runtime_stat_avg(st, STAT_TOPDOWN_SLOTS_RETIRED,
- ctx, cpu);
+ double total_slots = td_total_slots(ctx, cpu, st, evsel);
+ double ret_slots = runtime_stat_avg_uk(st, STAT_TOPDOWN_SLOTS_RETIRED,
+ ctx, cpu, evsel,
+ STAT_TOPDOWN_NUM);
if (total_slots)
retiring = ret_slots / total_slots;
return retiring;
}
-static double td_fe_bound(int ctx, int cpu, struct runtime_stat *st)
+static double td_fe_bound(int ctx, int cpu, struct runtime_stat *st,
+ struct evsel *evsel)
{
double fe_bound = 0;
- double total_slots = td_total_slots(ctx, cpu, st);
- double fetch_bub = runtime_stat_avg(st, STAT_TOPDOWN_FETCH_BUBBLES,
- ctx, cpu);
+ double total_slots = td_total_slots(ctx, cpu, st, evsel);
+ double fetch_bub = runtime_stat_avg_uk(st, STAT_TOPDOWN_FETCH_BUBBLES,
+ ctx, cpu, evsel,
+ STAT_TOPDOWN_NUM);
if (total_slots)
fe_bound = fetch_bub / total_slots;
return fe_bound;
}
-static double td_be_bound(int ctx, int cpu, struct runtime_stat *st)
+static double td_be_bound(int ctx, int cpu, struct runtime_stat *st,
+ struct evsel *evsel)
{
- double sum = (td_fe_bound(ctx, cpu, st) +
- td_bad_spec(ctx, cpu, st) +
- td_retiring(ctx, cpu, st));
+ double sum = (td_fe_bound(ctx, cpu, st, evsel) +
+ td_bad_spec(ctx, cpu, st, evsel) +
+ td_retiring(ctx, cpu, st, evsel));
if (sum == 0)
return 0;
return sanitize_val(1.0 - sum);
@@ -814,6 +862,33 @@ static void generic_metric(struct perf_stat_config *config,
zfree(&pctx.ids[i].name);
}
+static void print_metric_uk(struct perf_stat_config *config,
+ void *ctx, const char *color,
+ const char *fmt, const char *unit,
+ double val, struct evsel *evsel,
+ print_metric_t print_metric)
+{
+ struct perf_event_attr *attr = &evsel->core.attr;
+ char *new_unit;
+
+ if (!attr->exclude_user && !attr->exclude_kernel) {
+ print_metric(config, ctx, color, fmt, unit, val);
+ return;
+ }
+
+ new_unit = calloc(1, strlen(unit) + 3);
+ if (!new_unit)
+ return;
+
+ if (attr->exclude_user)
+ sprintf(new_unit, "%s:k", unit);
+ else
+ sprintf(new_unit, "%s:u", unit);
+
+ print_metric(config, ctx, color, fmt, new_unit, val);
+ free(new_unit);
+}
+
void perf_stat__print_shadow_stats(struct perf_stat_config *config,
struct evsel *evsel,
double avg, int cpu,
@@ -986,28 +1061,30 @@ void perf_stat__print_shadow_stats(struct perf_stat_config *config,
else
print_metric(config, ctxp, NULL, NULL, "CPUs utilized", 0);
} else if (perf_stat_evsel__is(evsel, TOPDOWN_FETCH_BUBBLES)) {
- double fe_bound = td_fe_bound(ctx, cpu, st);
+ double fe_bound = td_fe_bound(ctx, cpu, st, evsel);
if (fe_bound > 0.2)
color = PERF_COLOR_RED;
- print_metric(config, ctxp, color, "%8.1f%%", "frontend bound",
- fe_bound * 100.);
+ print_metric_uk(config, ctxp, color, "%8.1f%%",
+ "frontend bound",
+ fe_bound * 100., evsel, print_metric);
} else if (perf_stat_evsel__is(evsel, TOPDOWN_SLOTS_RETIRED)) {
- double retiring = td_retiring(ctx, cpu, st);
+ double retiring = td_retiring(ctx, cpu, st, evsel);
if (retiring > 0.7)
color = PERF_COLOR_GREEN;
- print_metric(config, ctxp, color, "%8.1f%%", "retiring",
- retiring * 100.);
+ print_metric_uk(config, ctxp, color, "%8.1f%%", "retiring",
+ retiring * 100., evsel, print_metric);
} else if (perf_stat_evsel__is(evsel, TOPDOWN_RECOVERY_BUBBLES)) {
- double bad_spec = td_bad_spec(ctx, cpu, st);
+ double bad_spec = td_bad_spec(ctx, cpu, st, evsel);
if (bad_spec > 0.1)
color = PERF_COLOR_RED;
- print_metric(config, ctxp, color, "%8.1f%%", "bad speculation",
- bad_spec * 100.);
+ print_metric_uk(config, ctxp, color, "%8.1f%%",
+ "bad speculation",
+ bad_spec * 100., evsel, print_metric);
} else if (perf_stat_evsel__is(evsel, TOPDOWN_SLOTS_ISSUED)) {
- double be_bound = td_be_bound(ctx, cpu, st);
+ double be_bound = td_be_bound(ctx, cpu, st, evsel);
const char *name = "backend bound";
static int have_recovery_bubbles = -1;
@@ -1020,11 +1097,13 @@ void perf_stat__print_shadow_stats(struct perf_stat_config *config,
if (be_bound > 0.2)
color = PERF_COLOR_RED;
- if (td_total_slots(ctx, cpu, st) > 0)
- print_metric(config, ctxp, color, "%8.1f%%", name,
- be_bound * 100.);
- else
- print_metric(config, ctxp, NULL, NULL, name, 0);
+ if (td_total_slots(ctx, cpu, st, evsel) > 0)
+ print_metric_uk(config, ctxp, color, "%8.1f%%", name,
+ be_bound * 100., evsel, print_metric);
+ else {
+ print_metric_uk(config, ctxp, NULL, NULL, name, 0,
+ evsel, print_metric);
+ }
} else if (evsel->metric_expr) {
generic_metric(config, evsel->metric_expr, evsel->metric_events, evsel->name,
evsel->metric_name, NULL, avg, cpu, out, st);
diff --git a/tools/perf/util/stat.h b/tools/perf/util/stat.h
index 8154e07ced64..1bae80ed5543 100644
--- a/tools/perf/util/stat.h
+++ b/tools/perf/util/stat.h
@@ -60,6 +60,8 @@ enum {
#define NUM_CTX CTX_BIT_MAX
+#define STAT_TOPDOWN_NUM 5
+
enum stat_type {
STAT_NONE = 0,
STAT_NSECS,
@@ -81,6 +83,16 @@ enum stat_type {
STAT_TOPDOWN_SLOTS_RETIRED,
STAT_TOPDOWN_FETCH_BUBBLES,
STAT_TOPDOWN_RECOVERY_BUBBLES,
+ STAT_TOPDOWN_TOTAL_SLOTS_K,
+ STAT_TOPDOWN_SLOTS_ISSUED_K,
+ STAT_TOPDOWN_SLOTS_RETIRED_K,
+ STAT_TOPDOWN_FETCH_BUBBLES_K,
+ STAT_TOPDOWN_RECOVERY_BUBBLES_K,
+ STAT_TOPDOWN_TOTAL_SLOTS_U,
+ STAT_TOPDOWN_SLOTS_ISSUED_U,
+ STAT_TOPDOWN_SLOTS_RETIRED_U,
+ STAT_TOPDOWN_FETCH_BUBBLES_U,
+ STAT_TOPDOWN_RECOVERY_BUBBLES_U,
STAT_SMI_NUM,
STAT_APERF,
STAT_MAX
--
2.17.1