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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.

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: Jiri Olsa <jolsa@kernel.org>
Link: https://lore.kernel.org/r/20230809083440.3209381-24-jolsa@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Jiri Olsa
2023-08-09 10:34:35 +02:00
committed by Alexei Starovoitov
parent 519dfeaf51
commit 3706919ee0
2 changed files with 55 additions and 0 deletions
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40
tools/testing/selftests/bpf/prog_tests/uprobe_multi_test.c
View File

@@ -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 @@ cleanup:
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();
}

15
tools/testing/selftests/bpf/progs/uprobe_multi_bench.c Normal file
View File

@@ -0,0 +1,15 @@
// 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;
}