perf list: Display hybrid PMU events with cpu type

Add a new option '--cputype' to 'perf list' to display core-only PMU
events or atom-only PMU events.

Each hybrid PMU event has been assigned with a PMU name, this patch
compares the PMU name before listing the result.

For example:

perf list --cputype atom
...
cache:
core_reject_l2q.any
[Counts the number of request that were not accepted into the L2Q because the L2Q is FULL. Unit: cpu_atom]
...

The "Unit: cpu_atom" is displayed in the brief description section
to indicate this is an atom event.

Signed-off-by: Jin Yao <[e-mail]>
Cc: Alexander Shishkin <[e-mail]>
Cc: Andi Kleen <[e-mail]>
Cc: Jin Yao <[e-mail]>
Cc: Jiri Olsa <[e-mail]>
Cc: Kan Liang <[e-mail]>
Cc: Peter Zijlstra <[e-mail]>
Link: http://lore.kernel.org/lkml/[e-mail]
Signed-off-by: Arnaldo Carvalho de Melo <[e-mail]>

tools/perf/Documentation/perf-list.txt

···
 --deprecated::
 Print deprecated events. By default the deprecated events are hidden.
 
+--cputype::
+Print events applying cpu with this type for hybrid platform
+(e.g. --cputype core or --cputype atom)
+
 [[EVENT_MODIFIERS]]
 EVENT MODIFIERS
 ---------------

tools/perf/builtin-list.c

···
 
 #include "util/parse-events.h"
 #include "util/pmu.h"
+#include "util/pmu-hybrid.h"
 #include "util/debug.h"
 #include "util/metricgroup.h"
 #include <subcmd/pager.h>
···
 
 static bool desc_flag = true;
 static bool details_flag;
+static const char *hybrid_type;
 
 int cmd_list(int argc, const char **argv)
 {
-	int i;
+	int i, ret = 0;
 	bool raw_dump = false;
 	bool long_desc_flag = false;
 	bool deprecated = false;
+	char *pmu_name = NULL;
 	struct option list_options[] = {
 		OPT_BOOLEAN(0, "raw-dump", &raw_dump, "Dump raw events"),
 		OPT_BOOLEAN('d', "desc", &desc_flag,
···
 			    "Print information on the perf event names and expressions used internally by events."),
 		OPT_BOOLEAN(0, "deprecated", &deprecated,
 			    "Print deprecated events."),
+		OPT_STRING(0, "cputype", &hybrid_type, "hybrid cpu type",
+			   "Print events applying cpu with this type for hybrid platform "
+			   "(e.g. core or atom)"),
 		OPT_INCR(0, "debug", &verbose,
 			     "Enable debugging output"),
 		OPT_END()
···
 	if (!raw_dump && pager_in_use())
 		printf("\nList of pre-defined events (to be used in -e):\n\n");
 
+	if (hybrid_type) {
+		pmu_name = perf_pmu__hybrid_type_to_pmu(hybrid_type);
+		if (!pmu_name)
+			pr_warning("WARNING: hybrid cputype is not supported!\n");
+	}
+
 	if (argc == 0) {
 		print_events(NULL, raw_dump, !desc_flag, long_desc_flag,
-				details_flag, deprecated);
-		return 0;
+				details_flag, deprecated, pmu_name);
+		goto out;
 	}
 
 	for (i = 0; i < argc; ++i) {
···
 		else if (strcmp(argv[i], "pmu") == 0)
 			print_pmu_events(NULL, raw_dump, !desc_flag,
 						long_desc_flag, details_flag,
-						deprecated);
+						deprecated, pmu_name);
 		else if (strcmp(argv[i], "sdt") == 0)
 			print_sdt_events(NULL, NULL, raw_dump);
 		else if (strcmp(argv[i], "metric") == 0 || strcmp(argv[i], "metrics") == 0)
-			metricgroup__print(true, false, NULL, raw_dump, details_flag);
+			metricgroup__print(true, false, NULL, raw_dump, details_flag, pmu_name);
 		else if (strcmp(argv[i], "metricgroup") == 0 || strcmp(argv[i], "metricgroups") == 0)
-			metricgroup__print(false, true, NULL, raw_dump, details_flag);
+			metricgroup__print(false, true, NULL, raw_dump, details_flag, pmu_name);
 		else if ((sep = strchr(argv[i], ':')) != NULL) {
 			int sep_idx;
 
 			sep_idx = sep - argv[i];
 			s = strdup(argv[i]);
-			if (s == NULL)
-				return -1;
+			if (s == NULL) {
+				ret = -1;
+				goto out;
+			}
 
 			s[sep_idx] = '\0';
 			print_tracepoint_events(s, s + sep_idx + 1, raw_dump);
 			print_sdt_events(s, s + sep_idx + 1, raw_dump);
-			metricgroup__print(true, true, s, raw_dump, details_flag);
+			metricgroup__print(true, true, s, raw_dump, details_flag, pmu_name);
 			free(s);
 		} else {
 			if (asprintf(&s, "*%s*", argv[i]) < 0) {
···
 			print_pmu_events(s, raw_dump, !desc_flag,
 						long_desc_flag,
 						details_flag,
-						deprecated);
+						deprecated,
+						pmu_name);
 			print_tracepoint_events(NULL, s, raw_dump);
 			print_sdt_events(NULL, s, raw_dump);
-			metricgroup__print(true, true, s, raw_dump, details_flag);
+			metricgroup__print(true, true, s, raw_dump, details_flag, pmu_name);
 			free(s);
 		}
 	}
-	return 0;
+
+out:
+	free(pmu_name);
+	return ret;
 }

tools/perf/util/metricgroup.c

···
 #include "evsel.h"
 #include "strbuf.h"
 #include "pmu.h"
+#include "pmu-hybrid.h"
 #include "expr.h"
 #include "rblist.h"
 #include <string.h>
···
 }
 
 void metricgroup__print(bool metrics, bool metricgroups, char *filter,
-			bool raw, bool details)
+			bool raw, bool details, const char *pmu_name)
 {
 	const struct pmu_events_map *map = pmu_events_map__find();
 	const struct pmu_event *pe;
···
 			break;
 		if (!pe->metric_expr)
 			continue;
+		if (pmu_name && perf_pmu__is_hybrid(pe->pmu) &&
+		    strcmp(pmu_name, pe->pmu)) {
+			continue;
+		}
 		if (metricgroup__print_pmu_event(pe, metricgroups, filter,
 						 raw, details, &groups,
 						 metriclist) < 0)

tools/perf/util/metricgroup.h

···
 				   struct rblist *metric_events);
 
 void metricgroup__print(bool metrics, bool groups, char *filter,
-			bool raw, bool details);
+			bool raw, bool details, const char *pmu_name);
 bool metricgroup__has_metric(const char *metric);
 int arch_get_runtimeparam(const struct pmu_event *pe __maybe_unused);
 void metricgroup__rblist_exit(struct rblist *metric_events);

tools/perf/util/parse-events.c

···
  * Print the help text for the event symbols:
  */
 void print_events(const char *event_glob, bool name_only, bool quiet_flag,
-			bool long_desc, bool details_flag, bool deprecated)
+			bool long_desc, bool details_flag, bool deprecated,
+			const char *pmu_name)
 {
 	print_symbol_events(event_glob, PERF_TYPE_HARDWARE,
 			    event_symbols_hw, PERF_COUNT_HW_MAX, name_only);
···
 	print_hwcache_events(event_glob, name_only);
 
 	print_pmu_events(event_glob, name_only, quiet_flag, long_desc,
-			details_flag, deprecated);
+			details_flag, deprecated, pmu_name);
 
 	if (event_glob != NULL)
 		return;
···
 
 	print_sdt_events(NULL, NULL, name_only);
 
-	metricgroup__print(true, true, NULL, name_only, details_flag);
+	metricgroup__print(true, true, NULL, name_only, details_flag,
+			   pmu_name);
 
 	print_libpfm_events(name_only, long_desc);
 }

tools/perf/util/parse-events.h

···
 			       int idx, const char *str);
 
 void print_events(const char *event_glob, bool name_only, bool quiet,
-		  bool long_desc, bool details_flag, bool deprecated);
+		  bool long_desc, bool details_flag, bool deprecated,
+		  const char *pmu_name);
 
 struct event_symbol {
 	const char	*symbol;

tools/perf/util/pmu.c

···
 {
 	const struct sevent *as = a;
 	const struct sevent *bs = b;
+	int ret;
 
 	/* Put extra events last */
 	if (!!as->desc != !!bs->desc)
···
 	if (as->is_cpu != bs->is_cpu)
 		return bs->is_cpu - as->is_cpu;
 
-	return strcmp(as->name, bs->name);
+	ret = strcmp(as->name, bs->name);
+	if (!ret) {
+		if (as->pmu && bs->pmu)
+			return strcmp(as->pmu, bs->pmu);
+	}
+
+	return ret;
 }
 
 static void wordwrap(char *s, int start, int max, int corr)
···
 }
 
 void print_pmu_events(const char *event_glob, bool name_only, bool quiet_flag,
-			bool long_desc, bool details_flag, bool deprecated)
+			bool long_desc, bool details_flag, bool deprecated,
+			const char *pmu_name)
 {
 	struct perf_pmu *pmu;
 	struct perf_pmu_alias *alias;
···
 	pmu = NULL;
 	j = 0;
 	while ((pmu = perf_pmu__scan(pmu)) != NULL) {
+		if (pmu_name && perf_pmu__is_hybrid(pmu->name) &&
+		    strcmp(pmu_name, pmu->name)) {
+			continue;
+		}
+
 		list_for_each_entry(alias, &pmu->aliases, list) {
 			char *name = alias->desc ? alias->name :
 				format_alias(buf, sizeof(buf), pmu, alias);
-			bool is_cpu = is_pmu_core(pmu->name);
+			bool is_cpu = is_pmu_core(pmu->name) ||
+				      perf_pmu__is_hybrid(pmu->name);
 
 			if (alias->deprecated && !deprecated)
 				continue;
···
 	qsort(aliases, len, sizeof(struct sevent), cmp_sevent);
 	for (j = 0; j < len; j++) {
 		/* Skip duplicates */
-		if (j > 0 && !strcmp(aliases[j].name, aliases[j - 1].name))
-			continue;
+		if (j > 0 && !strcmp(aliases[j].name, aliases[j - 1].name)) {
+			if (!aliases[j].pmu || !aliases[j - 1].pmu ||
+			    !strcmp(aliases[j].pmu, aliases[j - 1].pmu)) {
+				continue;
+			}
+		}
+
 		if (name_only) {
 			printf("%s ", aliases[j].name);
 			continue;

tools/perf/util/pmu.h

···
 bool is_pmu_core(const char *name);
 void print_pmu_events(const char *event_glob, bool name_only, bool quiet,
 		      bool long_desc, bool details_flag,
-		      bool deprecated);
+		      bool deprecated, const char *pmu_name);
 bool pmu_have_event(const char *pname, const char *name);
 
 int perf_pmu__scan_file(struct perf_pmu *pmu, const char *name, const char *fmt, ...) __scanf(3, 4);