Messages in this thread | | | From | Song Liu <> | Subject | Re: [RFC 2/2] perf-stat: enable counting events for BPF programs | Date | Tue, 24 Nov 2020 23:31:49 +0000 |
| |
> On Nov 23, 2020, at 3:47 PM, Jiri Olsa <jolsa@redhat.com> wrote:
[...]
> > I still need to review this deeply, but so far I'm getting this error: > > # ./perf stat -b 40 > libbpf: elf: skipping unrecognized data section(9) .eh_frame > libbpf: elf: skipping relo section(15) .rel.eh_frame for section(9) .eh_frame > libbpf: XXX is not found in vmlinux BTF > libbpf: failed to load object 'bpf_prog_profiler_bpf' > libbpf: failed to load BPF skeleton 'bpf_prog_profiler_bpf': -2 > libbpf: elf: skipping unrecognized data section(9) .eh_frame > libbpf: elf: skipping relo section(15) .rel.eh_frame for section(9) .eh_frame > libbpf: XXX is not found in vmlinux BTF > libbpf: failed to load object 'bpf_prog_profiler_bpf' > libbpf: failed to load BPF skeleton 'bpf_prog_profiler_bpf': -2 > libbpf: elf: skipping unrecognized data section(9) .eh_frame > libbpf: elf: skipping relo section(15) .rel.eh_frame for section(9) .eh_frame > libbpf: XXX is not found in vmlinux BTF > libbpf: failed to load object 'bpf_prog_profiler_bpf' > libbpf: failed to load BPF skeleton 'bpf_prog_profiler_bpf': -2 > libbpf: elf: skipping unrecognized data section(9) .eh_frame > libbpf: elf: skipping relo section(15) .rel.eh_frame for section(9) .eh_frame > libbpf: XXX is not found in vmlinux BTF > libbpf: failed to load object 'bpf_prog_profiler_bpf' > libbpf: failed to load BPF skeleton 'bpf_prog_profiler_bpf': -2 > libbpf: elf: skipping unrecognized data section(9) .eh_frame > libbpf: elf: skipping relo section(15) .rel.eh_frame for section(9) .eh_frame > libbpf: XXX is not found in vmlinux BTF > libbpf: failed to load object 'bpf_prog_profiler_bpf' > libbpf: failed to load BPF skeleton 'bpf_prog_profiler_bpf': -2 > libbpf: elf: skipping unrecognized data section(9) .eh_frame > libbpf: elf: skipping relo section(15) .rel.eh_frame for section(9) .eh_frame > libbpf: XXX is not found in vmlinux BTF > libbpf: failed to load object 'bpf_prog_profiler_bpf' > libbpf: failed to load BPF skeleton 'bpf_prog_profiler_bpf': -2 > libbpf: elf: skipping unrecognized data section(9) .eh_frame > libbpf: elf: skipping relo section(15) .rel.eh_frame for section(9) .eh_frame > libbpf: XXX is not found in vmlinux BTF > libbpf: failed to load object 'bpf_prog_profiler_bpf' > libbpf: failed to load BPF skeleton 'bpf_prog_profiler_bpf': -2 > libbpf: elf: skipping unrecognized data section(9) .eh_frame > libbpf: elf: skipping relo section(15) .rel.eh_frame for section(9) .eh_frame > libbpf: XXX is not found in vmlinux BTF > libbpf: failed to load object 'bpf_prog_profiler_bpf' > libbpf: failed to load BPF skeleton 'bpf_prog_profiler_bpf': -2 > libbpf: Can't get the 0th fd from program fentry_XXX: only -1 instances > libbpf: prog 'fentry_XXX': can't attach before loaded > libbpf: failed to auto-attach program 'fentry_XXX': -22
I cannot reproduce this. Is 40 a valid BPF program ID? Could you please share more information about it with "bpftool prog show id 40"?
Thanks, Song
| |