linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Song Liu <songliubraving@fb.com>
To: Jiri Olsa <jolsa@redhat.com>
Cc: open list <linux-kernel@vger.kernel.org>,
	Kernel Team <Kernel-team@fb.com>,
	Peter Ziljstra <peterz@infradead.org>,
	Ingo Molnar <mingo@redhat.com>,
	Arnaldo Carvalho de Melo <acme@kernel.org>,
	Mark Rutland <mark.rutland@arm.com>,
	Alexander Shishkin <alexander.shishkin@linux.intel.com>,
	"namhyung@kernel.org" <namhyung@kernel.org>
Subject: Re: [RFC 2/2] perf-stat: enable counting events for BPF programs
Date: Tue, 24 Nov 2020 23:31:49 +0000	[thread overview]
Message-ID: <86F842B0-BF89-4418-BA2E-F93E50726A81@fb.com> (raw)
In-Reply-To: <20201123234735.GB2088148@krava>



> 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

  reply	other threads:[~2020-11-24 23:32 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-11-19  4:50 [RFC 0/2] Introduce perf-stat -b for BPF programs Song Liu
2020-11-19  4:50 ` [RFC 1/2] perf: support build BPF skeletons with perf Song Liu
2020-11-22 23:27   ` Jiri Olsa
2020-11-24 23:47     ` Song Liu
2020-11-25 16:38       ` Jiri Olsa
2020-11-22 23:32   ` Jiri Olsa
2020-11-24 23:51     ` Song Liu
2020-11-22 23:35   ` Jiri Olsa
2020-11-24 23:52     ` Song Liu
2020-11-25 16:40       ` Jiri Olsa
2020-11-24 19:51   ` Jiri Olsa
2020-11-24 23:59     ` Song Liu
2020-11-24 19:51   ` Jiri Olsa
2020-11-24 23:53     ` Song Liu
2020-11-19  4:50 ` [RFC 2/2] perf-stat: enable counting events for BPF programs Song Liu
2020-11-23 23:47   ` Jiri Olsa
2020-11-24 23:31     ` Song Liu [this message]
2020-11-25 16:42       ` Jiri Olsa
2020-11-24 19:51   ` Jiri Olsa
2020-11-24 23:43     ` Song Liu
2020-11-25  0:02       ` Song Liu
2020-11-25 16:43         ` Jiri Olsa
2020-11-19 14:52 ` [RFC 0/2] Introduce perf-stat -b " Arnaldo Carvalho de Melo

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=86F842B0-BF89-4418-BA2E-F93E50726A81@fb.com \
    --to=songliubraving@fb.com \
    --cc=Kernel-team@fb.com \
    --cc=acme@kernel.org \
    --cc=alexander.shishkin@linux.intel.com \
    --cc=jolsa@redhat.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=mark.rutland@arm.com \
    --cc=mingo@redhat.com \
    --cc=namhyung@kernel.org \
    --cc=peterz@infradead.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).