perf cpu_map: Add cpu_map event synthesize function

Introduce the perf_event__synthesize_cpu_map function to synthesize a
struct cpu_map.

Added generic interface:
  cpu_map_data__alloc
  cpu_map_data__synthesize

to make the cpu_map synthesizing usable for other events.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Kan Liang <kan.liang@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1445784728-21732-9-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

4 files changed, 77 insertions, 0 deletions

diff --git a/tools/perf/tests/Build b/tools/perf/tests/Build
index f23fb7ed4400..7abad28fe17e 100644
--- a/tools/perf/tests/Build
+++ b/tools/perf/tests/Build
@@ -34,6 +34,7 @@ perf-y += thread-map.o
 perf-y += llvm.o llvm-src-base.o llvm-src-kbuild.o llvm-src-prologue.o
 perf-y += bpf.o
 perf-y += topology.o
+perf-y += cpumap.o
 
 $(OUTPUT)tests/llvm-src-base.c: tests/bpf-script-example.c tests/Build
 	$(call rule_mkdir)
diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-test.c
index 745bdb02d22b..0c3fe2846de8 100644
--- a/tools/perf/tests/builtin-test.c
+++ b/tools/perf/tests/builtin-test.c
@@ -184,6 +184,10 @@ static struct test generic_tests[] = {
 		.func = test__thread_map_synthesize,
 	},
 	{
+		.desc = "Test cpu map synthesize",
+		.func = test__cpu_map_synthesize,
+	},
+	{
 		.func = NULL,
 	},
 };
diff --git a/tools/perf/tests/cpumap.c b/tools/perf/tests/cpumap.c
new file mode 100644
index 000000000000..715480558088
--- /dev/null
+++ b/tools/perf/tests/cpumap.c
@@ -0,0 +1,71 @@
+#include "tests.h"
+#include "cpumap.h"
+
+static int process_event_mask(struct perf_tool *tool __maybe_unused,
+			 union perf_event *event,
+			 struct perf_sample *sample __maybe_unused,
+			 struct machine *machine __maybe_unused)
+{
+	struct cpu_map_event *map = &event->cpu_map;
+	struct cpu_map_mask *mask;
+	struct cpu_map_data *data;
+	int i;
+
+	data = &map->data;
+
+	TEST_ASSERT_VAL("wrong type", data->type == PERF_CPU_MAP__MASK);
+
+	mask = (struct cpu_map_mask *)data->data;
+
+	TEST_ASSERT_VAL("wrong nr",   mask->nr == 1);
+
+	for (i = 0; i < 20; i++) {
+		TEST_ASSERT_VAL("wrong cpu", test_bit(i, mask->mask));
+	}
+
+	return 0;
+}
+
+static int process_event_cpus(struct perf_tool *tool __maybe_unused,
+			 union perf_event *event,
+			 struct perf_sample *sample __maybe_unused,
+			 struct machine *machine __maybe_unused)
+{
+	struct cpu_map_event *map = &event->cpu_map;
+	struct cpu_map_entries *cpus;
+	struct cpu_map_data *data;
+
+	data = &map->data;
+
+	TEST_ASSERT_VAL("wrong type", data->type == PERF_CPU_MAP__CPUS);
+
+	cpus = (struct cpu_map_entries *)data->data;
+
+	TEST_ASSERT_VAL("wrong nr",   cpus->nr == 2);
+	TEST_ASSERT_VAL("wrong cpu",  cpus->cpu[0] == 1);
+	TEST_ASSERT_VAL("wrong cpu",  cpus->cpu[1] == 256);
+	return 0;
+}
+
+
+int test__cpu_map_synthesize(int subtest __maybe_unused)
+{
+	struct cpu_map *cpus;
+
+	/* This one is better stores in mask. */
+	cpus = cpu_map__new("0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19");
+
+	TEST_ASSERT_VAL("failed to synthesize map",
+		!perf_event__synthesize_cpu_map(NULL, cpus, process_event_mask, NULL));
+
+	cpu_map__put(cpus);
+
+	/* This one is better stores in cpu values. */
+	cpus = cpu_map__new("1,256");
+
+	TEST_ASSERT_VAL("failed to synthesize map",
+		!perf_event__synthesize_cpu_map(NULL, cpus, process_event_cpus, NULL));
+
+	cpu_map__put(cpus);
+	return 0;
+}
diff --git a/tools/perf/tests/tests.h b/tools/perf/tests/tests.h
index 3fe52ccc4d05..f85160f6ebb8 100644
--- a/tools/perf/tests/tests.h
+++ b/tools/perf/tests/tests.h
@@ -80,6 +80,7 @@ const char *test__bpf_subtest_get_desc(int subtest);
 int test__bpf_subtest_get_nr(void);
 int test_session_topology(int subtest);
 int test__thread_map_synthesize(int subtest);
+int test__cpu_map_synthesize(int subtest);
 
 #if defined(__arm__) || defined(__aarch64__)
 #ifdef HAVE_DWARF_UNWIND_SUPPORT