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Subject[PATCH 76/79] libperf: Add perf_evsel tests
Date
Add 2 simple perf_evsel tests to test counters reading
interface through the struct evsel object.

Link: http://lkml.kernel.org/n/tip-0u2226ojf8zpb4jbvdz108yh@git.kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
tools/perf/lib/tests/Makefile | 2 +-
tools/perf/lib/tests/test-evsel.c | 82 +++++++++++++++++++++++++++++++
2 files changed, 83 insertions(+), 1 deletion(-)
create mode 100644 tools/perf/lib/tests/test-evsel.c

diff --git a/tools/perf/lib/tests/Makefile b/tools/perf/lib/tests/Makefile
index e66ed090f08e..1ee4e9ba848b 100644
--- a/tools/perf/lib/tests/Makefile
+++ b/tools/perf/lib/tests/Makefile
@@ -1,6 +1,6 @@
# SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)

-TESTS = test-cpumap test-threadmap test-evlist
+TESTS = test-cpumap test-threadmap test-evlist test-evsel

TESTS_SO := $(addsuffix -so,$(TESTS))
TESTS_A := $(addsuffix -a,$(TESTS))
diff --git a/tools/perf/lib/tests/test-evsel.c b/tools/perf/lib/tests/test-evsel.c
new file mode 100644
index 000000000000..268712292f60
--- /dev/null
+++ b/tools/perf/lib/tests/test-evsel.c
@@ -0,0 +1,82 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/perf_event.h>
+#include <perf/cpumap.h>
+#include <perf/threadmap.h>
+#include <perf/evsel.h>
+#include <internal/tests.h>
+
+static int test_stat_cpu(void)
+{
+ struct perf_cpu_map *cpus;
+ struct perf_evsel *evsel;
+ struct perf_event_attr attr = {
+ .type = PERF_TYPE_SOFTWARE,
+ .config = PERF_COUNT_SW_CPU_CLOCK,
+ };
+ int err, cpu, tmp;
+
+ cpus = perf_cpu_map__new(NULL);
+ __T("failed to create cpus", cpus);
+
+ evsel = perf_evsel__new(&attr);
+ __T("failed to create evsel", evsel);
+
+ err = perf_evsel__open(evsel, cpus, NULL);
+ __T("failed to open evsel", err == 0);
+
+ perf_cpu_map__for_each_cpu(cpu, tmp, cpus) {
+ struct perf_counts_values counts = { .val = 0 };
+
+ perf_evsel__read(evsel, cpu, 0, &counts);
+ __T("failed to read value for evsel", counts.val != 0);
+ }
+
+ perf_evsel__close(evsel);
+ perf_evsel__delete(evsel);
+
+ perf_cpu_map__put(cpus);
+ return 0;
+}
+
+static int test_stat_thread(void)
+{
+ struct perf_counts_values counts = { .val = 0 };
+ struct perf_thread_map *threads;
+ struct perf_evsel *evsel;
+ struct perf_event_attr attr = {
+ .type = PERF_TYPE_SOFTWARE,
+ .config = PERF_COUNT_SW_TASK_CLOCK,
+ };
+ int err;
+
+ threads = perf_thread_map__new_dummy();
+ __T("failed to create threads", threads);
+
+ perf_thread_map__set_pid(threads, 0, 0);
+
+ evsel = perf_evsel__new(&attr);
+ __T("failed to create evsel", evsel);
+
+ err = perf_evsel__open(evsel, NULL, threads);
+ __T("failed to open evsel", err == 0);
+
+ perf_evsel__read(evsel, 0, 0, &counts);
+ __T("failed to read value for evsel", counts.val != 0);
+
+ perf_evsel__close(evsel);
+ perf_evsel__delete(evsel);
+
+ perf_thread_map__put(threads);
+ return 0;
+}
+
+int main(int argc, char **argv)
+{
+ __T_START;
+
+ test_stat_cpu();
+ test_stat_thread();
+
+ __T_OK;
+ return 0;
+}
--
2.21.0
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