[PATCH v1 39/51] perf stat: Add TopdownL1 metric as a default if present

[Ian Rogers <irogers@google.com>]

When there are no events and on Intel, the topdown events will be
added by default if present. To display the metrics associated with
these request special handling in stat-shadow.c. To more easily update
these metrics use the json metric version via the TopdownL1
group. This makes the handling less platform specific.

Modify the metricgroup__has_metric code to also cover metric groups.

Signed-off-by: Ian Rogers <irogers@google.com>
---
 tools/perf/arch/x86/util/evlist.c  |  6 +++---
 tools/perf/arch/x86/util/topdown.c | 30 ------------------------------
 tools/perf/arch/x86/util/topdown.h |  1 -
 tools/perf/builtin-stat.c          | 14 ++++++++++++++
 tools/perf/util/metricgroup.c      |  6 ++----
 5 files changed, 19 insertions(+), 38 deletions(-)

diff --git a/tools/perf/arch/x86/util/evlist.c b/tools/perf/arch/x86/util/evlist.c
index cb59ce9b9638..8a7ae4162563 100644
--- a/tools/perf/arch/x86/util/evlist.c
+++ b/tools/perf/arch/x86/util/evlist.c
@@ -59,10 +59,10 @@ int arch_evlist__add_default_attrs(struct evlist *evlist,
 				   struct perf_event_attr *attrs,
 				   size_t nr_attrs)
 {
-	if (nr_attrs)
-		return ___evlist__add_default_attrs(evlist, attrs, nr_attrs);
+	if (!nr_attrs)
+		return 0;
 
-	return topdown_parse_events(evlist);
+	return ___evlist__add_default_attrs(evlist, attrs, nr_attrs);
 }
 
 struct evsel *arch_evlist__leader(struct list_head *list)
diff --git a/tools/perf/arch/x86/util/topdown.c b/tools/perf/arch/x86/util/topdown.c
index 54810f9acd6f..eb3a7d9652ab 100644
--- a/tools/perf/arch/x86/util/topdown.c
+++ b/tools/perf/arch/x86/util/topdown.c
@@ -9,11 +9,6 @@
 #include "topdown.h"
 #include "evsel.h"
 
-#define TOPDOWN_L1_EVENTS       "{slots,topdown-retiring,topdown-bad-spec,topdown-fe-bound,topdown-be-bound}"
-#define TOPDOWN_L1_EVENTS_CORE  "{slots,cpu_core/topdown-retiring/,cpu_core/topdown-bad-spec/,cpu_core/topdown-fe-bound/,cpu_core/topdown-be-bound/}"
-#define TOPDOWN_L2_EVENTS       "{slots,topdown-retiring,topdown-bad-spec,topdown-fe-bound,topdown-be-bound,topdown-heavy-ops,topdown-br-mispredict,topdown-fetch-lat,topdown-mem-bound}"
-#define TOPDOWN_L2_EVENTS_CORE  "{slots,cpu_core/topdown-retiring/,cpu_core/topdown-bad-spec/,cpu_core/topdown-fe-bound/,cpu_core/topdown-be-bound/,cpu_core/topdown-heavy-ops/,cpu_core/topdown-br-mispredict/,cpu_core/topdown-fetch-lat/,cpu_core/topdown-mem-bound/}"
-
 /* Check whether there is a PMU which supports the perf metrics. */
 bool topdown_sys_has_perf_metrics(void)
 {
@@ -99,28 +94,3 @@ const char *arch_get_topdown_pmu_name(struct evlist *evlist, bool warn)
 
 	return pmu_name;
 }
-
-int topdown_parse_events(struct evlist *evlist)
-{
-	const char *topdown_events;
-	const char *pmu_name;
-
-	if (!topdown_sys_has_perf_metrics())
-		return 0;
-
-	pmu_name = arch_get_topdown_pmu_name(evlist, false);
-
-	if (pmu_have_event(pmu_name, "topdown-heavy-ops")) {
-		if (!strcmp(pmu_name, "cpu_core"))
-			topdown_events = TOPDOWN_L2_EVENTS_CORE;
-		else
-			topdown_events = TOPDOWN_L2_EVENTS;
-	} else {
-		if (!strcmp(pmu_name, "cpu_core"))
-			topdown_events = TOPDOWN_L1_EVENTS_CORE;
-		else
-			topdown_events = TOPDOWN_L1_EVENTS;
-	}
-
-	return parse_event(evlist, topdown_events);
-}
diff --git a/tools/perf/arch/x86/util/topdown.h b/tools/perf/arch/x86/util/topdown.h
index 7eb81f042838..46bf9273e572 100644
--- a/tools/perf/arch/x86/util/topdown.h
+++ b/tools/perf/arch/x86/util/topdown.h
@@ -3,6 +3,5 @@
 #define _TOPDOWN_H 1
 
 bool topdown_sys_has_perf_metrics(void);
-int topdown_parse_events(struct evlist *evlist);
 
 #endif
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index 5e13171a7bba..796e98e453f6 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -1996,6 +1996,7 @@ static int add_default_attributes(void)
 		stat_config.topdown_level = TOPDOWN_MAX_LEVEL;
 
 	if (!evsel_list->core.nr_entries) {
+		/* No events so add defaults. */
 		if (target__has_cpu(&target))
 			default_attrs0[0].config = PERF_COUNT_SW_CPU_CLOCK;
 
@@ -2011,6 +2012,19 @@ static int add_default_attributes(void)
 		}
 		if (evlist__add_default_attrs(evsel_list, default_attrs1) < 0)
 			return -1;
+		/*
+		 * Add TopdownL1 metrics if they exist. To minimize
+		 * multiplexing, don't request threshold computation.
+		 */
+		if (metricgroup__has_metric("TopdownL1") &&
+		    metricgroup__parse_groups(evsel_list, "TopdownL1",
+					    /*metric_no_group=*/false,
+					    /*metric_no_merge=*/false,
+					    /*metric_no_threshold=*/true,
+					    stat_config.user_requested_cpu_list,
+					    stat_config.system_wide,
+					    &stat_config.metric_events) < 0)
+			return -1;
 		/* Platform specific attrs */
 		if (evlist__add_default_attrs(evsel_list, default_null_attrs) < 0)
 			return -1;
diff --git a/tools/perf/util/metricgroup.c b/tools/perf/util/metricgroup.c
index afb6f2fdc24e..64a35f2787dc 100644
--- a/tools/perf/util/metricgroup.c
+++ b/tools/perf/util/metricgroup.c
@@ -1647,10 +1647,8 @@ static int metricgroup__has_metric_callback(const struct pmu_metric *pm,
 {
 	const char *metric = vdata;
 
-	if (!pm->metric_expr)
-		return 0;
-
-	if (match_metric(pm->metric_name, metric))
+	if (match_metric(pm->metric_name, metric) ||
+	    match_metric(pm->metric_group, metric))
 		return 1;
 
 	return 0;
-- 
2.39.2.637.g21b0678d19-goog