Adding test that attaches 50k usdt probes in usdt_multi binary.
After the attach is done we run the binary and make sure we get
proper amount of hits.
With current uprobes:
# perf stat --null ./test_progs -n 254/6
#254/6 uprobe_multi_test/bench_usdt:OK
#254 uprobe_multi_test:OK
Summary: 1/1 PASSED, 0 SKIPPED, 0 FAILED
Performance counter stats for './test_progs -n 254/6':
1353.659680562 seconds time elapsed
With uprobe_multi link:
# perf stat --null ./test_progs -n 254/6
#254/6 uprobe_multi_test/bench_usdt:OK
#254 uprobe_multi_test:OK
Summary: 1/1 PASSED, 0 SKIPPED, 0 FAILED
Performance counter stats for './test_progs -n 254/6':
0.322046364 seconds time elapsed
Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx>
---
.../bpf/prog_tests/uprobe_multi_test.c | 54 +++++++++++++++++++
.../selftests/bpf/progs/uprobe_multi_usdt.c | 16 ++++++
2 files changed, 70 insertions(+)
create mode 100644 tools/testing/selftests/bpf/progs/uprobe_multi_usdt.c
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 9a89c61359a1..ff08d4b8dbfe 100644
--- a/tools/testing/selftests/bpf/prog_tests/uprobe_multi_test.c
+++ b/tools/testing/selftests/bpf/prog_tests/uprobe_multi_test.c
@@ -3,6 +3,7 @@
#include <unistd.h>
#include <test_progs.h>
#include "uprobe_multi.skel.h"
+#include "uprobe_multi_usdt.skel.h"
noinline void uprobe_multi_func_1(void)
{
@@ -217,6 +218,57 @@ void test_bench_attach_uprobe(void)
printf("%s: detached in %7.3lfs\n", __func__, detach_delta);
}
+void test_bench_attach_usdt(void)
+{
+ struct uprobe_multi_usdt *skel = NULL;
+ long attach_start_ns, attach_end_ns;
+ long detach_start_ns, detach_end_ns;
+ double attach_delta, detach_delta;
+ LIBBPF_OPTS(bpf_usdt_opts, opts,
+ .uprobe_multi = true,
+ );
+ struct bpf_program *prog;
+ int err;
+
+ skel = uprobe_multi_usdt__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.usdt0, true);
+ bpf_program__set_expected_attach_type(skel->progs.usdt0, BPF_TRACE_UPROBE_MULTI);
+
+ err = uprobe_multi_usdt__load(skel);
+ if (!ASSERT_EQ(err, 0, "strncmp_test load"))
+ goto cleanup;
+
+ attach_start_ns = get_time_ns();
+
+ skel->links.usdt0 = bpf_program__attach_usdt(skel->progs.usdt0, -1, "./usdt_multi",
+ "test", "usdt", &opts);
+ if (!ASSERT_OK_PTR(skel->links.usdt0, "usdt_link"))
+ goto cleanup;
+
+ attach_end_ns = get_time_ns();
+
+ system("./usdt_multi");
+
+ ASSERT_EQ(skel->bss->count, 50000, "usdt_count");
+
+cleanup:
+ detach_start_ns = get_time_ns();
+ uprobe_multi_usdt__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"))
@@ -229,4 +281,6 @@ void test_uprobe_multi_test(void)
test_link_api();
if (test__start_subtest("bench_uprobe"))
test_bench_attach_uprobe();
+ if (test__start_subtest("bench_usdt"))
+ test_bench_attach_usdt();
}
diff --git a/tools/testing/selftests/bpf/progs/uprobe_multi_usdt.c b/tools/testing/selftests/bpf/progs/uprobe_multi_usdt.c
new file mode 100644
index 000000000000..9e1c33d0bd2f
--- /dev/null
+++ b/tools/testing/selftests/bpf/progs/uprobe_multi_usdt.c
@@ -0,0 +1,16 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include "vmlinux.h"
+#include <bpf/bpf_helpers.h>
+#include <bpf/usdt.bpf.h>
+
+char _license[] SEC("license") = "GPL";
+
+int count;
+
+SEC("usdt")
+int usdt0(struct pt_regs *ctx)
+{
+ count++;
+ return 0;
+}
--
2.40.0
