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selftests/bpf: Add 5-byte NOP uprobe trigger benchmark

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Add a 5-byte NOP uprobe trigger benchmark (x86_64 specific) to measure
uprobes/uretprobes on top of NOP5 instructions.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Song Liu <songliubraving@fb.com>
Cc: Yonghong Song <yhs@fb.com>
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: Hao Luo <haoluo@google.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Alan Maguire <alan.maguire@oracle.com>
Link: https://lore.kernel.org/r/20250414083647.1234007-2-jolsa@kernel.org
This commit is contained in:
Jiri Olsa 2025-04-14 10:36:47 +02:00 committed by Ingo Molnar
parent 610f6e14c2
commit fe8e5a3215
3 changed files with 55 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
tools/testing/selftests/bpf/bench.c
View File

@ -526,6 +526,12 @@ extern const struct bench bench_trig_uprobe_multi_push;
extern const struct bench bench_trig_uretprobe_multi_push;
extern const struct bench bench_trig_uprobe_multi_ret;
extern const struct bench bench_trig_uretprobe_multi_ret;
#ifdef __x86_64__
extern const struct bench bench_trig_uprobe_nop5;
extern const struct bench bench_trig_uretprobe_nop5;
extern const struct bench bench_trig_uprobe_multi_nop5;
extern const struct bench bench_trig_uretprobe_multi_nop5;
#endif
extern const struct bench bench_rb_libbpf;
extern const struct bench bench_rb_custom;
@ -586,6 +592,12 @@ static const struct bench *benchs[] = {
&bench_trig_uretprobe_multi_push,
&bench_trig_uprobe_multi_ret,
&bench_trig_uretprobe_multi_ret,
#ifdef __x86_64__
&bench_trig_uprobe_nop5,
&bench_trig_uretprobe_nop5,
&bench_trig_uprobe_multi_nop5,
&bench_trig_uretprobe_multi_nop5,
#endif
/* ringbuf/perfbuf benchmarks */
&bench_rb_libbpf,
&bench_rb_custom,

42
tools/testing/selftests/bpf/benchs/bench_trigger.c
View File

@ -333,6 +333,20 @@ static void *uprobe_producer_ret(void *input)
return NULL;
}
#ifdef __x86_64__
__nocf_check __weak void uprobe_target_nop5(void)
{
asm volatile (".byte 0x0f, 0x1f, 0x44, 0x00, 0x00");
}
static void *uprobe_producer_nop5(void *input)
{
while (true)
uprobe_target_nop5();
return NULL;
}
#endif
static void usetup(bool use_retprobe, bool use_multi, void *target_addr)
{
size_t uprobe_offset;
@ -448,6 +462,28 @@ static void uretprobe_multi_ret_setup(void)
usetup(true, true /* use_multi */, &uprobe_target_ret);
}
#ifdef __x86_64__
static void uprobe_nop5_setup(void)
{
usetup(false, false /* !use_multi */, &uprobe_target_nop5);
}
static void uretprobe_nop5_setup(void)
{
usetup(true, false /* !use_multi */, &uprobe_target_nop5);
}
static void uprobe_multi_nop5_setup(void)
{
usetup(false, true /* use_multi */, &uprobe_target_nop5);
}
static void uretprobe_multi_nop5_setup(void)
{
usetup(true, true /* use_multi */, &uprobe_target_nop5);
}
#endif
const struct bench bench_trig_syscall_count = {
.name = "trig-syscall-count",
.validate = trigger_validate,
@ -506,3 +542,9 @@ BENCH_TRIG_USERMODE(uprobe_multi_ret, ret, "uprobe-multi-ret");
BENCH_TRIG_USERMODE(uretprobe_multi_nop, nop, "uretprobe-multi-nop");
BENCH_TRIG_USERMODE(uretprobe_multi_push, push, "uretprobe-multi-push");
BENCH_TRIG_USERMODE(uretprobe_multi_ret, ret, "uretprobe-multi-ret");
#ifdef __x86_64__
BENCH_TRIG_USERMODE(uprobe_nop5, nop5, "uprobe-nop5");
BENCH_TRIG_USERMODE(uretprobe_nop5, nop5, "uretprobe-nop5");
BENCH_TRIG_USERMODE(uprobe_multi_nop5, nop5, "uprobe-multi-nop5");
BENCH_TRIG_USERMODE(uretprobe_multi_nop5, nop5, "uretprobe-multi-nop5");
#endif

2
tools/testing/selftests/bpf/benchs/run_bench_uprobes.sh
View File

@ -2,7 +2,7 @@
set -eufo pipefail
for i in usermode-count syscall-count {uprobe,uretprobe}-{nop,push,ret}
for i in usermode-count syscall-count {uprobe,uretprobe}-{nop,push,ret,nop5}
do
summary=$(sudo ./bench -w2 -d5 -a trig-$i | tail -n1 | cut -d'(' -f1 | cut -d' ' -f3-)
printf "%-15s: %s\n" $i "$summary"