> On Nov 23, 2020, at 3:47 PM, Jiri Olsa <jo...@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
