Commit 3706919e authored by Jiri Olsa's avatar Jiri Olsa Committed by Alexei Starovoitov
Browse files

selftests/bpf: Add uprobe_multi bench test 



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.

The resulting attach/detach times on my setup:

  test_bench_attach_uprobe:PASS:uprobe_multi__open 0 nsec
  test_bench_attach_uprobe:PASS:uprobe_multi__attach 0 nsec
  test_bench_attach_uprobe:PASS:uprobes_count 0 nsec
  test_bench_attach_uprobe: attached in   0.346s
  test_bench_attach_uprobe: detached in   0.419s
  #262/5   uprobe_multi_test/bench_uprobe:OK

Signed-off-by: default avatarJiri Olsa <jolsa@kernel.org>
Link: https://lore.kernel.org/r/20230809083440.3209381-24-jolsa@kernel.org


Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
parent 519dfeaf

tools/testing/selftests/bpf/prog_tests/uprobe_multi_test.c

+40 −0
Original line number Diff line number Diff line
@@ -3,7 +3,9 @@ 
#include <unistd.h>

#include <test_progs.h>

#include "uprobe_multi.skel.h"

#include "uprobe_multi_bench.skel.h"

#include "bpf/libbpf_internal.h"

#include "testing_helpers.h"



static char test_data[] = "test_data";
@@ -197,6 +199,42 @@ static void test_link_api(void) 
	free(offsets);

}



static void test_bench_attach_uprobe(void)

{

	long attach_start_ns = 0, attach_end_ns = 0;

	struct uprobe_multi_bench *skel = NULL;

	long detach_start_ns, detach_end_ns;

	double attach_delta, detach_delta;

	int err;



	skel = uprobe_multi_bench__open_and_load();

	if (!ASSERT_OK_PTR(skel, "uprobe_multi_bench__open_and_load"))

		goto cleanup;



	attach_start_ns = get_time_ns();



	err = uprobe_multi_bench__attach(skel);

	if (!ASSERT_OK(err, "uprobe_multi_bench__attach"))

		goto cleanup;



	attach_end_ns = get_time_ns();



	system("./uprobe_multi bench");



	ASSERT_EQ(skel->bss->count, 50000, "uprobes_count");



cleanup:

	detach_start_ns = get_time_ns();

	uprobe_multi_bench__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"))
@@ -207,4 +245,6 @@ 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();

}

tools/testing/selftests/bpf/progs/uprobe_multi_bench.c

0 → 100644
+15 −0
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0

#include <linux/bpf.h>

#include <bpf/bpf_helpers.h>

#include <bpf/bpf_tracing.h>



char _license[] SEC("license") = "GPL";



int count;



SEC("uprobe.multi/./uprobe_multi:uprobe_multi_func_*")

int uprobe_bench(struct pt_regs *ctx)

{

	count++;

	return 0;

}