[PATCH 16/47] perf tools: Add cpu_map event synthesize function

[Jiri Olsa <jolsa@kernel.org>]

Introduce perf_event__synthesize_cpu_map function to
sythesize struct cpu_map.

Link: http://lkml.kernel.org/n/tip-miidn8vqsx3udu4ct8103v5f@git.kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
 tools/perf/tests/Build          |  1 +
 tools/perf/tests/builtin-test.c |  4 ++++
 tools/perf/tests/cpumap.c       | 29 +++++++++++++++++++++++++++++
 tools/perf/tests/tests.h        |  1 +
 tools/perf/util/event.c         | 28 ++++++++++++++++++++++++++++
 tools/perf/util/event.h         |  5 +++++
 6 files changed, 68 insertions(+)
 create mode 100644 tools/perf/tests/cpumap.c

diff --git a/tools/perf/tests/Build b/tools/perf/tests/Build
index d20d6e6ab65b..05faf02ed1ee 100644
--- a/tools/perf/tests/Build
+++ b/tools/perf/tests/Build
@@ -32,6 +32,7 @@ perf-y += sample-parsing.o
 perf-y += parse-no-sample-id-all.o
 perf-y += kmod-path.o
 perf-y += thread-map.o
+perf-y += cpumap.o
 
 perf-$(CONFIG_X86) += perf-time-to-tsc.o
 
diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-test.c
index 7b289d20bd8b..d4cfc0592f6b 100644
--- a/tools/perf/tests/builtin-test.c
+++ b/tools/perf/tests/builtin-test.c
@@ -179,6 +179,10 @@ static struct test {
 		.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..475c040f8a8d
--- /dev/null
+++ b/tools/perf/tests/cpumap.c
@@ -0,0 +1,29 @@
+#include "tests.h"
+#include "cpumap.h"
+
+static int process_event(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;
+
+	TEST_ASSERT_VAL("wrong nr",   map->nr == 3);
+	TEST_ASSERT_VAL("wrong cpu",  map->cpu[0] == 1);
+	TEST_ASSERT_VAL("wrong cpu",  map->cpu[1] == 2);
+	TEST_ASSERT_VAL("wrong cpu",  map->cpu[2] == 4);
+	return 0;
+}
+
+int test__cpu_map_synthesize(void)
+{
+	struct cpu_map *cpus;
+
+	cpus = cpu_map__new("1,2,4");
+
+
+	TEST_ASSERT_VAL("failed to synthesize map",
+		!perf_event__synthesize_cpu_map(NULL, cpus, process_event, NULL));
+
+	return 0;
+}
diff --git a/tools/perf/tests/tests.h b/tools/perf/tests/tests.h
index 14e2d821d0fd..c251d5a21e0c 100644
--- a/tools/perf/tests/tests.h
+++ b/tools/perf/tests/tests.h
@@ -63,6 +63,7 @@ int test__fdarray__add(void);
 int test__kmod_path__parse(void);
 int test__thread_map(void);
 int test__thread_map_synthesize(void);
+int test__cpu_map_synthesize(void);
 
 #if defined(__x86_64__) || defined(__i386__) || defined(__arm__) || defined(__aarch64__)
 #ifdef HAVE_DWARF_UNWIND_SUPPORT
diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
index 9f8ffbfc5cd4..7bbe64c51d85 100644
--- a/tools/perf/util/event.c
+++ b/tools/perf/util/event.c
@@ -735,6 +735,34 @@ int perf_event__synthesize_thread_map2(struct perf_tool *tool,
 	return err;
 }
 
+int perf_event__synthesize_cpu_map(struct perf_tool *tool,
+				   struct cpu_map *cpus,
+				   perf_event__handler_t process,
+				   struct machine *machine)
+{
+	union perf_event *event;
+	int i, err, size;
+
+	size  = sizeof(event->cpu_map);
+	size +=	cpus->nr * sizeof(event->cpu_map.cpu[0]);
+
+	event = zalloc(size);
+	if (!event)
+		return -ENOMEM;
+
+	event->header.type = PERF_RECORD_CPU_MAP;
+	event->header.size = size;
+	event->cpu_map.nr = cpus->nr;
+
+	for (i = 0; i < cpus->nr; i++)
+		event->cpu_map.cpu[i] = cpus->map[i];
+
+	err = process(tool, event, NULL, machine);
+
+	free(event);
+	return err;
+}
+
 size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp)
 {
 	const char *s;
diff --git a/tools/perf/util/event.h b/tools/perf/util/event.h
index f05c4d868162..6600da608782 100644
--- a/tools/perf/util/event.h
+++ b/tools/perf/util/event.h
@@ -396,6 +396,7 @@ void perf_event__print_totals(void);
 
 struct perf_tool;
 struct thread_map;
+struct cpu_map;
 
 typedef int (*perf_event__handler_t)(struct perf_tool *tool,
 				     union perf_event *event,
@@ -411,6 +412,10 @@ int perf_event__synthesize_thread_map2(struct perf_tool *tool,
 				      struct thread_map *threads,
 				      perf_event__handler_t process,
 				      struct machine *machine);
+int perf_event__synthesize_cpu_map(struct perf_tool *tool,
+				   struct cpu_map *cpus,
+				   perf_event__handler_t process,
+				   struct machine *machine);
 int perf_event__synthesize_threads(struct perf_tool *tool,
 				   perf_event__handler_t process,
 				   struct machine *machine, bool mmap_data,
-- 
2.4.3