This set introduces perf-stat -b option to count events for BPF programs. This is similar to bpftool-prog-profile. But perf-stat makes it much more flexible.
Sending as RFC because I haven't addressed some known limitations: 1. Only counting events for one BPF program at a time. 2. Need extra logic in target__validate(). Changes RFCv1 => RFCv2: 1. Use bootstrap version of bpftool. (Jiri) 2. Set default to not building bpf skeletons. (Jiri) 3. Remove util/bpf_skel/Makefile, keep all the logic in Makefile.perf. (Jiri) 4. Remove dependency to vmlinux.h in the two skeletons. The goal here is to enable building perf without building kernel (vmlinux) first. Note: I also removed the logic that build vmlinux.h. We can add that back when we have to use it (to access big kernel structures). Song Liu (2): perf: support build BPF skeletons with perf perf-stat: enable counting events for BPF programs tools/bpf/bpftool/Makefile | 2 + tools/build/Makefile.feature | 3 +- tools/perf/Makefile.config | 9 + tools/perf/Makefile.perf | 52 ++++- tools/perf/builtin-stat.c | 59 ++++- tools/perf/util/Build | 1 + tools/perf/util/bpf_counter.c | 215 ++++++++++++++++++ tools/perf/util/bpf_counter.h | 71 ++++++ tools/perf/util/bpf_skel/.gitignore | 3 + .../util/bpf_skel/bpf_prog_profiler.bpf.c | 96 ++++++++ tools/perf/util/bpf_skel/dummy.bpf.c | 19 ++ tools/perf/util/evsel.c | 10 + tools/perf/util/evsel.h | 5 + tools/perf/util/target.h | 6 + tools/scripts/Makefile.include | 1 + 15 files changed, 541 insertions(+), 11 deletions(-) create mode 100644 tools/perf/util/bpf_counter.c create mode 100644 tools/perf/util/bpf_counter.h create mode 100644 tools/perf/util/bpf_skel/.gitignore create mode 100644 tools/perf/util/bpf_skel/bpf_prog_profiler.bpf.c create mode 100644 tools/perf/util/bpf_skel/dummy.bpf.c -- 2.24.1