[PATCHv3 bpf-next 21/26] selftests/bpf: Add uprobe_multi bench test

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Adding test that attaches 50k uprobes in uprobe_multi binary.

After the attach is done we run the binary and make sure we
get proper amount of hits.

Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx>
---
 .../bpf/prog_tests/uprobe_multi_test.c        | 56 +++++++++++++++++++
 .../selftests/bpf/progs/uprobe_multi.c        |  9 +++
 2 files changed, 65 insertions(+)

diff --git a/tools/testing/selftests/bpf/prog_tests/uprobe_multi_test.c b/tools/testing/selftests/bpf/prog_tests/uprobe_multi_test.c
index fd858636b8b0..547d46965d70 100644
--- a/tools/testing/selftests/bpf/prog_tests/uprobe_multi_test.c
+++ b/tools/testing/selftests/bpf/prog_tests/uprobe_multi_test.c
@@ -202,6 +202,60 @@ static void test_link_api(void)
 	free(offsets);
 }
 
+static inline __u64 get_time_ns(void)
+{
+	struct timespec t;
+
+	clock_gettime(CLOCK_MONOTONIC, &t);
+	return (__u64) t.tv_sec * 1000000000 + t.tv_nsec;
+}
+
+static void test_bench_attach_uprobe(void)
+{
+	long attach_start_ns, attach_end_ns;
+	long detach_start_ns, detach_end_ns;
+	double attach_delta, detach_delta;
+	struct uprobe_multi *skel = NULL;
+	struct bpf_program *prog;
+	int err;
+
+	skel = uprobe_multi__open();
+	if (!ASSERT_OK_PTR(skel, "uprobe_multi__open"))
+		goto cleanup;
+
+	bpf_object__for_each_program(prog, skel->obj)
+		bpf_program__set_autoload(prog, false);
+
+	bpf_program__set_autoload(skel->progs.test_uprobe_bench, true);
+
+	err = uprobe_multi__load(skel);
+	if (!ASSERT_EQ(err, 0, "uprobe_multi__load"))
+		goto cleanup;
+
+	attach_start_ns = get_time_ns();
+
+	err = uprobe_multi__attach(skel);
+	if (!ASSERT_OK(err, "uprobe_multi__attach"))
+		goto cleanup;
+
+	attach_end_ns = get_time_ns();
+
+	system("./uprobe_multi");
+
+	ASSERT_EQ(skel->bss->count, 50000, "uprobes_count");
+
+cleanup:
+	detach_start_ns = get_time_ns();
+	uprobe_multi__destroy(skel);
+	detach_end_ns = get_time_ns();
+
+	attach_delta = (attach_end_ns - attach_start_ns) / 1000000000.0;
+	detach_delta = (detach_end_ns - detach_start_ns) / 1000000000.0;
+
+	printf("%s: attached in %7.3lfs\n", __func__, attach_delta);
+	printf("%s: detached in %7.3lfs\n", __func__, detach_delta);
+}
+
 void test_uprobe_multi_test(void)
 {
 	if (test__start_subtest("skel_api"))
@@ -212,4 +266,6 @@ void test_uprobe_multi_test(void)
 		test_attach_api_syms();
 	if (test__start_subtest("link_api"))
 		test_link_api();
+	if (test__start_subtest("bench_uprobe"))
+		test_bench_attach_uprobe();
 }
diff --git a/tools/testing/selftests/bpf/progs/uprobe_multi.c b/tools/testing/selftests/bpf/progs/uprobe_multi.c
index 1eeb9b7b9cad..cd73139dc881 100644
--- a/tools/testing/selftests/bpf/progs/uprobe_multi.c
+++ b/tools/testing/selftests/bpf/progs/uprobe_multi.c
@@ -89,3 +89,12 @@ int test_uretprobe_sleep(struct pt_regs *ctx)
 	uprobe_multi_check(ctx, true, true);
 	return 0;
 }
+
+int count;
+
+SEC("?uprobe.multi/./uprobe_multi:uprobe_multi_func_*")
+int test_uprobe_bench(struct pt_regs *ctx)
+{
+	count++;
+	return 0;
+}
-- 
2.41.0





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