perf stat: Support hybrid --topdown option

Since for cpu_core or cpu_atom, they have different topdown events
groups.

For cpu_core, --topdown equals to:

"{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/}"

For cpu_atom, --topdown equals to:

"{cpu_atom/topdown-retiring/,cpu_atom/topdown-bad-spec/,
 cpu_atom/topdown-fe-bound/,cpu_atom/topdown-be-bound/}"

To simplify the implementation, on hybrid, --topdown is used
together with --cputype. If without --cputype, it uses cpu_core
topdown events by default.

  # ./perf stat --topdown -a  sleep 1
  WARNING: default to use cpu_core topdown events

   Performance counter stats for 'system wide':

              retiring      bad speculation       frontend bound        backend bound     heavy operations     light operations    branch mispredict       machine clears        fetch latency      fetch bandwidth         memory bound           Core bound
                  4.1%                 0.0%                 5.1%                90.8%                 2.3%                 1.8%                 0.0%                 0.0%                 4.2%                 0.9%                 9.9%                81.0%

         1.002624229 seconds time elapsed

  # ./perf stat --topdown -a --cputype atom  sleep 1

   Performance counter stats for 'system wide':

              retiring      bad speculation       frontend bound        backend bound
                 13.5%                 0.1%                31.2%                55.2%

         1.002366987 seconds time elapsed
Reviewed-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Xing Zhengjun <zhengjun.xing@linux.intel.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20220422065635.767648-3-zhengjun.xing@linux.intel.comSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/builtin-stat.c

@@ -1867,11 +1867,23 @@ static int add_default_attributes(void)
 		unsigned int max_level = 1;
 		char *str = NULL;
 		bool warn = false;
+		const char *pmu_name = "cpu";
 
 		if (!force_metric_only)
 			stat_config.metric_only = true;
 
-		if (pmu_have_event("cpu", topdown_metric_L2_attrs[5])) {
+		if (perf_pmu__has_hybrid()) {
+			if (!evsel_list->hybrid_pmu_name) {
+				pr_warning("WARNING: default to use cpu_core topdown events\n");
+				evsel_list->hybrid_pmu_name = perf_pmu__hybrid_type_to_pmu("core");
+			}
+
+			pmu_name = evsel_list->hybrid_pmu_name;
+			if (!pmu_name)
+				return -1;
+		}
+
+		if (pmu_have_event(pmu_name, topdown_metric_L2_attrs[5])) {
 			metric_attrs = topdown_metric_L2_attrs;
 			max_level = 2;
 		}
@@ -1882,10 +1894,11 @@ static int add_default_attributes(void)
 		} else if (!stat_config.topdown_level)
 			stat_config.topdown_level = max_level;
 
-		if (topdown_filter_events(metric_attrs, &str, 1) < 0) {
+		if (topdown_filter_events(metric_attrs, &str, 1, pmu_name) < 0) {
 			pr_err("Out of memory\n");
 			return -1;
 		}
+
 		if (metric_attrs[0] && str) {
 			if (!stat_config.interval && !stat_config.metric_only) {
 				fprintf(stat_config.output,
@@ -1909,10 +1922,12 @@ static int add_default_attributes(void)
 		}
 
 		if (topdown_filter_events(topdown_attrs, &str,
-				arch_topdown_check_group(&warn)) < 0) {
+				arch_topdown_check_group(&warn),
+				pmu_name) < 0) {
 			pr_err("Out of memory\n");
 			return -1;
 		}
+
 		if (topdown_attrs[0] && str) {
 			struct parse_events_error errinfo;
 			if (warn)

tools/perf/util/stat.c

@@ -116,7 +116,9 @@ static void perf_stat_evsel_id_init(struct evsel *evsel)
 	/* ps->id is 0 hence PERF_STAT_EVSEL_ID__NONE by default */
 
 	for (i = 0; i < PERF_STAT_EVSEL_ID__MAX; i++) {
-		if (!strcmp(evsel__name(evsel), id_str[i])) {
+		if (!strcmp(evsel__name(evsel), id_str[i]) ||
+		    (strstr(evsel__name(evsel), id_str[i]) && evsel->pmu_name
+		     && strstr(evsel__name(evsel), evsel->pmu_name))) {
 			ps->id = i;
 			break;
 		}

tools/perf/util/topdown.c

 // SPDX-License-Identifier: GPL-2.0
 #include <stdio.h>
 #include "pmu.h"
+#include "pmu-hybrid.h"
 #include "topdown.h"
 
-int topdown_filter_events(const char **attr, char **str, bool use_group)
+int topdown_filter_events(const char **attr, char **str, bool use_group,
+			  const char *pmu_name)
 {
 	int off = 0;
 	int i;
 	int len = 0;
 	char *s;
+	bool is_hybrid = perf_pmu__is_hybrid(pmu_name);
 
 	for (i = 0; attr[i]; i++) {
-		if (pmu_have_event("cpu", attr[i])) {
-			len += strlen(attr[i]) + 1;
+		if (pmu_have_event(pmu_name, attr[i])) {
+			if (is_hybrid)
+				len += strlen(attr[i]) + strlen(pmu_name) + 3;
+			else
+				len += strlen(attr[i]) + 1;
 			attr[i - off] = attr[i];
 		} else
 			off++;
@@ -30,7 +36,10 @@ int topdown_filter_events(const char **attr, char **str, bool use_group)
 	if (use_group)
 		*s++ = '{';
 	for (i = 0; attr[i]; i++) {
-		strcpy(s, attr[i]);
+		if (!is_hybrid)
+			strcpy(s, attr[i]);
+		else
+			sprintf(s, "%s/%s/", pmu_name, attr[i]);
 		s += strlen(s);
 		*s++ = ',';
 	}

tools/perf/util/topdown.h

@@ -7,6 +7,7 @@ bool arch_topdown_check_group(bool *warn);
 void arch_topdown_group_warn(void);
 bool arch_topdown_sample_read(struct evsel *leader);
 
-int topdown_filter_events(const char **attr, char **str, bool use_group);
+int topdown_filter_events(const char **attr, char **str, bool use_group,
+			  const char *pmu_name);
 
 #endif