perf cpumap: Refactor cpu_map__build_map()

Turn it into a cpu_aggr_map__new(). Pass helper functions. Refactor
builtin-stat calls to manually pass function pointers. Try to reduce
some copy-paste code.

Reviewed-by: James Clark <james.clark@arm.com>
Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: John Garry <john.garry@huawei.com>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Riccardo Mancini <rickyman7@gmail.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: Vineet Singh <vineet.singh@intel.com>
Cc: coresight@lists.linaro.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: zhengjun.xing@intel.com
Link: https://lore.kernel.org/r/20220105061351.120843-19-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

2 files changed, 30 insertions, 45 deletions

diff --git a/tools/perf/util/cpumap.c b/tools/perf/util/cpumap.c
index 32f9fc2dd389..c8f9b3f15759 100644
--- a/tools/perf/util/cpumap.c
+++ b/tools/perf/util/cpumap.c
@@ -140,7 +140,7 @@ struct aggr_cpu_id cpu_map__get_socket_aggr_by_cpu(int cpu, void *data __maybe_u
 	return id;
 }
 
-static int cmp_aggr_cpu_id(const void *a_pointer, const void *b_pointer)
+static int aggr_cpu_id__cmp(const void *a_pointer, const void *b_pointer)
 {
 	struct aggr_cpu_id *a = (struct aggr_cpu_id *)a_pointer;
 	struct aggr_cpu_id *b = (struct aggr_cpu_id *)b_pointer;
@@ -157,37 +157,40 @@ static int cmp_aggr_cpu_id(const void *a_pointer, const void *b_pointer)
 		return a->thread - b->thread;
 }
 
-int cpu_map__build_map(struct perf_cpu_map *cpus, struct cpu_aggr_map **res,
-		       struct aggr_cpu_id (*f)(int cpu, void *data),
-		       void *data)
+struct cpu_aggr_map *cpu_aggr_map__new(const struct perf_cpu_map *cpus,
+				       aggr_cpu_id_get_t get_id,
+				       void *data)
 {
-	int nr = cpus->nr;
-	struct cpu_aggr_map *c = cpu_aggr_map__empty_new(nr);
-	int cpu, s2;
-	struct aggr_cpu_id s1;
+	int cpu, idx;
+	struct cpu_aggr_map *c = cpu_aggr_map__empty_new(cpus->nr);
 
 	if (!c)
-		return -1;
+		return NULL;
 
 	/* Reset size as it may only be partially filled */
 	c->nr = 0;
 
-	for (cpu = 0; cpu < nr; cpu++) {
-		s1 = f(cpu, data);
-		for (s2 = 0; s2 < c->nr; s2++) {
-			if (aggr_cpu_id__equal(&s1, &c->map[s2]))
+	perf_cpu_map__for_each_cpu(cpu, idx, cpus) {
+		bool duplicate = false;
+		struct aggr_cpu_id cpu_id = get_id(cpu, data);
+
+		for (int j = 0; j < c->nr; j++) {
+			if (aggr_cpu_id__equal(&cpu_id, &c->map[j])) {
+				duplicate = true;
 				break;
+			}
 		}
-		if (s2 == c->nr) {
-			c->map[c->nr] = s1;
+		if (!duplicate) {
+			c->map[c->nr] = cpu_id;
 			c->nr++;
 		}
 	}
+
 	/* ensure we process id in increasing order */
-	qsort(c->map, c->nr, sizeof(struct aggr_cpu_id), cmp_aggr_cpu_id);
+	qsort(c->map, c->nr, sizeof(struct aggr_cpu_id), aggr_cpu_id__cmp);
+
+	return c;
 
-	*res = c;
-	return 0;
 }
 
 int cpu__get_die_id(int cpu)
@@ -253,26 +256,6 @@ struct aggr_cpu_id cpu_map__get_node_aggr_by_cpu(int cpu, void *data __maybe_unu
 	return id;
 }
 
-int cpu_map__build_socket_map(struct perf_cpu_map *cpus, struct cpu_aggr_map **sockp)
-{
-	return cpu_map__build_map(cpus, sockp, cpu_map__get_socket_aggr_by_cpu, NULL);
-}
-
-int cpu_map__build_die_map(struct perf_cpu_map *cpus, struct cpu_aggr_map **diep)
-{
-	return cpu_map__build_map(cpus, diep, cpu_map__get_die_aggr_by_cpu, NULL);
-}
-
-int cpu_map__build_core_map(struct perf_cpu_map *cpus, struct cpu_aggr_map **corep)
-{
-	return cpu_map__build_map(cpus, corep, cpu_map__get_core_aggr_by_cpu, NULL);
-}
-
-int cpu_map__build_node_map(struct perf_cpu_map *cpus, struct cpu_aggr_map **numap)
-{
-	return cpu_map__build_map(cpus, numap, cpu_map__get_node_aggr_by_cpu, NULL);
-}
-
 /* setup simple routines to easily access node numbers given a cpu number */
 static int get_max_num(char *path, int *max)
 {
diff --git a/tools/perf/util/cpumap.h b/tools/perf/util/cpumap.h
index 87545bcd461d..611048e2a592 100644
--- a/tools/perf/util/cpumap.h
+++ b/tools/perf/util/cpumap.h
@@ -43,10 +43,6 @@ struct aggr_cpu_id cpu_map__get_socket_aggr_by_cpu(int cpu, void *data);
 struct aggr_cpu_id cpu_map__get_die_aggr_by_cpu(int cpu, void *data);
 struct aggr_cpu_id cpu_map__get_core_aggr_by_cpu(int cpu, void *data);
 struct aggr_cpu_id cpu_map__get_node_aggr_by_cpu(int cpu, void *data);
-int cpu_map__build_socket_map(struct perf_cpu_map *cpus, struct cpu_aggr_map **sockp);
-int cpu_map__build_die_map(struct perf_cpu_map *cpus, struct cpu_aggr_map **diep);
-int cpu_map__build_core_map(struct perf_cpu_map *cpus, struct cpu_aggr_map **corep);
-int cpu_map__build_node_map(struct perf_cpu_map *cpus, struct cpu_aggr_map **nodep);
 const struct perf_cpu_map *cpu_map__online(void); /* thread unsafe */
 
 int cpu__setup_cpunode_map(void);
@@ -75,10 +71,16 @@ int cpu__get_die_id(int cpu);
  */
 int cpu__get_core_id(int cpu);
 
+typedef struct aggr_cpu_id (*aggr_cpu_id_get_t)(int cpu, void *data);
 
-int cpu_map__build_map(struct perf_cpu_map *cpus, struct cpu_aggr_map **res,
-		       struct aggr_cpu_id (*f)(int cpu, void *data),
-		       void *data);
+/**
+ * cpu_aggr_map__new - Create a cpu_aggr_map with an aggr_cpu_id for each cpu in
+ * cpus. The aggr_cpu_id is created with 'get_id' that may have a data value
+ * passed to it. The cpu_aggr_map is sorted with duplicate values removed.
+ */
+struct cpu_aggr_map *cpu_aggr_map__new(const struct perf_cpu_map *cpus,
+				       aggr_cpu_id_get_t get_id,
+				       void *data);
 
 bool cpu_map__has(struct perf_cpu_map *cpus, int cpu);