Add the benchmark testcase "kprobe-multi-all", which will hook all the
kernel functions during the testing.

This series is separated out from [1].

Changes since V2:
* add some comment to attach_ksyms_all, which notes that don't run the
  testing on a debug kernel

Changes since V1:
* introduce trace_blacklist instead of copy-pasting strcmp in the 2nd
  patch
* use fprintf() instead of printf() in 3rd patch

Link: https://lore.kernel.org/bpf/20250817024607.296117-1-dongml2@chinatelecom.cn/ [1]
Menglong Dong (3):
  selftests/bpf: move get_ksyms and get_addrs to trace_helpers.c
  selftests/bpf: skip recursive functions for kprobe_multi
  selftests/bpf: add benchmark testing for kprobe-multi-all

 tools/testing/selftests/bpf/bench.c           |   4 +
 .../selftests/bpf/benchs/bench_trigger.c      |  61 +++++
 .../selftests/bpf/benchs/run_bench_trigger.sh |   4 +-
 .../bpf/prog_tests/kprobe_multi_test.c        | 220 +---------------
 .../selftests/bpf/progs/trigger_bench.c       |  12 +
 tools/testing/selftests/bpf/trace_helpers.c   | 234 ++++++++++++++++++
 tools/testing/selftests/bpf/trace_helpers.h   |   3 +
 7 files changed, 319 insertions(+), 219 deletions(-)

-- 
2.51.0

On Sun, Aug 31, 2025 at 8:43 PM Menglong Dong <menglong8.dong@gmail.com> wrote:
>
> Add the benchmark testcase "kprobe-multi-all", which will hook all the
> kernel functions during the testing.
>
> This series is separated out from [1].
>
> Changes since V2:
> * add some comment to attach_ksyms_all, which notes that don't run the
>   testing on a debug kernel
>
> Changes since V1:
> * introduce trace_blacklist instead of copy-pasting strcmp in the 2nd
>   patch
> * use fprintf() instead of printf() in 3rd patch
>
> Link: https://lore.kernel.org/bpf/20250817024607.296117-1-dongml2@chinatelecom.cn/ [1]
> Menglong Dong (3):
>   selftests/bpf: move get_ksyms and get_addrs to trace_helpers.c
>   selftests/bpf: skip recursive functions for kprobe_multi
>   selftests/bpf: add benchmark testing for kprobe-multi-all
>

this doesn't apply cleanly over bpf-next, can you please rebase and
resend to let CI run?

>  tools/testing/selftests/bpf/bench.c           |   4 +
>  .../selftests/bpf/benchs/bench_trigger.c      |  61 +++++
>  .../selftests/bpf/benchs/run_bench_trigger.sh |   4 +-
>  .../bpf/prog_tests/kprobe_multi_test.c        | 220 +---------------
>  .../selftests/bpf/progs/trigger_bench.c       |  12 +
>  tools/testing/selftests/bpf/trace_helpers.c   | 234 ++++++++++++++++++
>  tools/testing/selftests/bpf/trace_helpers.h   |   3 +
>  7 files changed, 319 insertions(+), 219 deletions(-)
>
> --
> 2.51.0
>