[PATCH v13 12/14] perf, tools: Add support for event list topics

@@ -203,7 +203,7 @@ static void print_events_table_prefix(FILE *fp, const char *tblname)
 }
 
 static int print_events_table_entry(void *data, char *name, char *event,
-				    char *desc, char *long_desc)
+				    char *desc, char *long_desc, char *topic)
 {
 	FILE *outfp = data;
 	/*

@@ -216,7 +216,9 @@ static int print_events_table_entry(void *data, char *name, char *event,
 	fprintf(outfp, "\t.event = \"%s\",\n", event);
 	fprintf(outfp, "\t.desc = \"%s\",\n", desc);
 	if (long_desc && long_desc[0])
-		fprintf(outfp, "\t.long_desc = \"%s\"", long_desc);
+		fprintf(outfp, "\t.long_desc = \"%s\",\n", long_desc);
+	if (topic)
+		fprintf(outfp, "\t.topic = \"%s\",\n", topic);
 	fprintf(outfp, "},\n");
 
 	return 0;

@@ -236,7 +238,8 @@ static void print_events_table_suffix(FILE *outfp)
 
 /* Call func with each event in the json file */
 int json_events(const char *fn,
-	  int (*func)(void *data, char *name, char *event, char *desc, char *long_desc),
+	  int (*func)(void *data, char *name, char *event, char *desc,
+		      char *long_desc, char *topic),
 	  void *data)
 {
 	int err = -EIO;

@@ -255,7 +258,7 @@ int json_events(const char *fn,
 	tok = tokens + 1;
 	for (i = 0; i < tokens->size; i++) {
 		char *event = NULL, *desc = NULL, *name = NULL, *long_desc = NULL;
-		char *extra_desc = NULL;
+		char *extra_desc = NULL, *topic = NULL;
 		struct msrmap *msr = NULL;
 		jsmntok_t *msrval = NULL;
 		jsmntok_t *precise = NULL;

@@ -294,6 +297,8 @@ int json_events(const char *fn,
 				   !json_streq(map, val, "null")) {
 				addfield(map, &extra_desc, ". ",
 					" Spec update: ", val);
+			} else if (json_streq(map, field, "Topic")) {
+				addfield(map, &topic, "", "", val);
 			} else if (json_streq(map, field, "Data_LA") && nz) {
 				addfield(map, &extra_desc, ". ",
 					" Supports address when precise",

@@ -316,12 +321,13 @@ int json_events(const char *fn,
 		if (msr != NULL)
 			addfield(map, &event, ",", msr->pname, msrval);
 		fixname(name);
-		err = func(data, name, event, desc, long_desc);
+		err = func(data, name, event, desc, long_desc, topic);
 		free(event);
 		free(desc);
 		free(name);
 		free(extra_desc);
 		free(long_desc);
+		free(topic);
 		if (err)
 			break;
 		tok += j;

@@ -2,7 +2,8 @@
 #define JEVENTS_H 1
 
 int json_events(const char *fn,
-		int (*func)(void *data, char *name, char *event, char *desc, char *long_desc),
+		int (*func)(void *data, char *name, char *event, char *desc,
+			    char *long_desc, char *topic),
 		void *data);
 char *get_cpu_str(void);
 

@@ -9,6 +9,7 @@ struct pmu_event {
 	const char *event;
 	const char *desc;
 	const char *long_desc;
+	const char *topic;
 };
 
 /*

@@ -209,7 +209,7 @@ static int perf_pmu__parse_snapshot(struct perf_pmu_alias *alias,
 }
 
 static int __perf_pmu__new_alias(struct list_head *list, char *name, char *dir, char *desc __maybe_unused, char *val,
-				 char *long_desc)
+				 char *long_desc, char *topic)
 {
 	struct perf_pmu_alias *alias;
 	int ret;

@@ -245,6 +245,7 @@ static int __perf_pmu__new_alias(struct list_head *list, char *name, char *dir,
 	alias->long_desc = long_desc ?
 			strdup(long_desc) :
 			desc ? strdup(desc) : NULL;
+	alias->topic = topic ? strdup(topic) : NULL;
 
 	list_add_tail(&alias->list, list);
 

@@ -261,7 +262,7 @@ static int perf_pmu__new_alias(struct list_head *list, char *dir, char *name, FI
 		return -EINVAL;
 	buf[ret] = 0;
 
-	return __perf_pmu__new_alias(list, name, dir, NULL, buf, NULL);
+	return __perf_pmu__new_alias(list, name, dir, NULL, buf, NULL, NULL);
 }
 
 static inline bool pmu_alias_info_file(char *name)

@@ -518,7 +519,8 @@ static int pmu_add_cpu_aliases(void *data)
 		/* need type casts to override 'const' */
 		__perf_pmu__new_alias(head, (char *)pe->name, NULL,
 				(char *)pe->desc, (char *)pe->event,
-				(char *)pe->long_desc);
+				(char *)pe->long_desc,
+				(char *)pe->topic);
 	}
 
 out:

@@ -1002,19 +1004,25 @@ static char *format_alias_or(char *buf, int len, struct perf_pmu *pmu,
 	return buf;
 }
 
-struct pair {
+struct sevent {
 	char *name;
 	char *desc;
+	char *topic;
 };
 
-static int cmp_pair(const void *a, const void *b)
+static int cmp_sevent(const void *a, const void *b)
 {
-	const struct pair *as = a;
-	const struct pair *bs = b;
+	const struct sevent *as = a;
+	const struct sevent *bs = b;
 
 	/* Put extra events last */
 	if (!!as->desc != !!bs->desc)
 		return !!as->desc - !!bs->desc;
+	if (as->topic && bs->topic) {
+		int n = strcmp(as->topic, bs->topic);
+		if (n)
+			return n;
+	}
 	return strcmp(as->name, bs->name);
 }
 

@@ -1048,11 +1056,12 @@ void print_pmu_events(const char *event_glob, bool name_only, bool quiet_flag,
 	char buf[1024];
 	int printed = 0;
 	int len, j;
-	struct pair *aliases;
+	struct sevent *aliases;
 	int numdesc = 0;
 	int columns = pager_get_columns();
 	const char *last_section;
 	int last_section_len;
+	char *topic = NULL;
 
 	pmu = NULL;
 	len = 0;

@@ -1062,7 +1071,7 @@ void print_pmu_events(const char *event_glob, bool name_only, bool quiet_flag,
 		if (pmu->selectable)
 			len++;
 	}
-	aliases = zalloc(sizeof(struct pair) * len);
+	aliases = zalloc(sizeof(struct sevent) * len);
 	if (!aliases)
 		goto out_enomem;
 	pmu = NULL;

@@ -1090,6 +1099,7 @@ void print_pmu_events(const char *event_glob, bool name_only, bool quiet_flag,
 			/* failure harmless */
 			aliases[j].desc = long_desc ? alias->long_desc :
 						      alias->desc;
+			aliases[j].topic = alias->topic;
 			j++;
 		}
 		if (pmu->selectable) {

@@ -1103,7 +1113,7 @@ void print_pmu_events(const char *event_glob, bool name_only, bool quiet_flag,
 	len = j;
 	last_section = NULL;
 	last_section_len = 0;
-	qsort(aliases, len, sizeof(struct pair), cmp_pair);
+	qsort(aliases, len, sizeof(struct sevent), cmp_sevent);
 	for (j = 0; j < len; j++) {
 		if (name_only) {
 			printf("%s ", aliases[j].name);

@@ -1115,6 +1125,10 @@ void print_pmu_events(const char *event_glob, bool name_only, bool quiet_flag,
 
 			if (numdesc++ == 0)
 				printf("\n");
+			if (aliases[j].topic && (!topic || strcmp(topic, aliases[j].topic))) {
+				printf("%s%s:\n", topic ? "\n" : "", aliases[j].topic);
+				topic = aliases[j].topic;
+			}
 			dot = strchr(name, '.');
 			if (dot &&
 				(!last_section ||

@@ -40,6 +40,7 @@ struct perf_pmu_alias {
 	char *name;
 	char *desc;
 	char *long_desc;
+	char *topic;
 	struct list_head terms; /* HEAD struct parse_events_term -> list */
 	struct list_head list;  /* ELEM */
 	char unit[UNIT_MAX_LEN+1];