From: Jiri Olsa <jolsa@redhat.com>
To: Song Liu <songliubraving@fb.com>
Cc: Networking <netdev@vger.kernel.org>,
linux-kernel <linux-kernel@vger.kernel.org>,
"ast@kernel.org" <ast@kernel.org>,
"daniel@iogearbox.net" <daniel@iogearbox.net>,
Kernel Team <Kernel-team@fb.com>,
"peterz@infradead.org" <peterz@infradead.org>,
"acme@redhat.com" <acme@redhat.com>,
"jolsa@kernel.org" <jolsa@kernel.org>,
"namhyung@kernel.org" <namhyung@kernel.org>
Subject: Re: [PATCH v5 perf,bpf 08/15] perf, bpf: save btf in a rbtree in perf_env
Date: Mon, 4 Mar 2019 21:31:32 +0100 [thread overview]
Message-ID: <20190304203132.GB2563@krava> (raw)
In-Reply-To: <8D38E918-5FF5-4404-8201-58A8FEFA086A@fb.com>
On Mon, Mar 04, 2019 at 07:43:50PM +0000, Song Liu wrote:
>
>
> > On Mar 4, 2019, at 5:52 AM, Jiri Olsa <jolsa@redhat.com> wrote:
> >
> > On Wed, Feb 27, 2019 at 09:06:36PM -0800, Song Liu wrote:
> >> btf contains information necessary to annotate bpf programs. This patch
> >> saves btf for bpf programs loaded in the system.
> >>
> >> Signed-off-by: Song Liu <songliubraving@fb.com>
> >> ---
> >> tools/perf/util/bpf-event.c | 24 ++++++++++++++
> >> tools/perf/util/bpf-event.h | 7 ++++
> >> tools/perf/util/env.c | 65 +++++++++++++++++++++++++++++++++++++
> >> tools/perf/util/env.h | 4 +++
> >> 4 files changed, 100 insertions(+)
> >>
> >> diff --git a/tools/perf/util/bpf-event.c b/tools/perf/util/bpf-event.c
> >> index ce81b2c43a51..370b830f2433 100644
> >> --- a/tools/perf/util/bpf-event.c
> >> +++ b/tools/perf/util/bpf-event.c
> >> @@ -34,6 +34,29 @@ int machine__process_bpf_event(struct machine *machine __maybe_unused,
> >> return 0;
> >> }
> >>
> >> +static int perf_env__fetch_btf(struct perf_env *env,
> >> + u32 btf_id,
> >> + struct btf *btf)
> >> +{
> >> + struct btf_node *node;
> >> + u32 data_size;
> >> + const void *data;
> >> +
> >> + data = btf__get_raw_data(btf, &data_size);
> >> +
> >> + node = malloc(data_size + sizeof(struct btf_node));
> >> +
> >> + if (!node)
> >> + return -1;
> >> +
> >> + node->id = btf_id;
> >> + node->data_size = data_size;
> >> + memcpy(node->data, data, data_size);
> >
> > why don't we store just struct btf itself?
> >
> > thanks,
> > jirka
>
> In current libbpf design, definition of "struct btf" is private
> to tools/lib/bpf/btf.c. So we cannot copy the struct itself.
ok
jirka
next prev parent reply other threads:[~2019-03-04 20:31 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-28 5:06 [PATCH v5 perf,bpf 00/15] perf annotation of BPF programs Song Liu
2019-02-28 5:06 ` [PATCH v5 perf,bpf 01/15] perf, bpf: consider events with attr.bpf_event as side-band events Song Liu
2019-02-28 5:06 ` [PATCH v5 perf,bpf 02/15] bpf: libbpf: introduce bpf_program__get_prog_info_linear() Song Liu
2019-02-28 5:06 ` [PATCH v5 perf,bpf 03/15] bpf: bpftool: use bpf_program__get_prog_info_linear() in prog.c:do_dump() Song Liu
2019-02-28 5:06 ` [PATCH v5 perf,bpf 04/15] perf, bpf: synthesize bpf events with bpf_program__get_prog_info_linear() Song Liu
2019-02-28 5:06 ` [PATCH v5 perf,bpf 05/15] perf: change prototype of perf_event__synthesize_bpf_events() Song Liu
2019-02-28 5:06 ` [PATCH v5 perf,bpf 06/15] perf, bpf: save bpf_prog_info in a rbtree in perf_env Song Liu
2019-02-28 5:06 ` [PATCH v5 perf,bpf 07/15] perf, bpf: save bpf_prog_info information as headers to perf.data Song Liu
2019-03-04 13:52 ` Jiri Olsa
2019-03-04 19:36 ` Song Liu
2019-03-04 20:23 ` Jiri Olsa
2019-03-04 20:31 ` Song Liu
2019-03-04 13:52 ` Jiri Olsa
2019-03-04 13:52 ` Jiri Olsa
2019-03-04 19:41 ` Song Liu
2019-03-04 20:37 ` Jiri Olsa
2019-03-04 13:52 ` Jiri Olsa
2019-02-28 5:06 ` [PATCH v5 perf,bpf 08/15] perf, bpf: save btf in a rbtree in perf_env Song Liu
2019-03-04 13:52 ` Jiri Olsa
2019-03-04 19:43 ` Song Liu
2019-03-04 20:31 ` Jiri Olsa [this message]
2019-03-04 13:53 ` Jiri Olsa
2019-02-28 5:06 ` [PATCH v5 perf,bpf 09/15] perf, bpf: save btf information as headers to perf.data Song Liu
2019-03-04 13:52 ` Jiri Olsa
2019-02-28 5:06 ` [PATCH v5 perf,bpf 10/15] perf-top: add option --no-bpf-event Song Liu
2019-02-28 5:06 ` [PATCH v5 perf,bpf 11/15] perf: add -lopcodes to feature-libbfd Song Liu
2019-02-28 5:06 ` [PATCH v5 perf,bpf 12/15] perf, bpf: enable annotation of bpf program Song Liu
2019-03-04 13:52 ` Jiri Olsa
2019-03-04 13:53 ` Jiri Olsa
2019-03-04 20:52 ` Song Liu
2019-03-04 13:53 ` Jiri Olsa
2019-03-04 19:45 ` Song Liu
2019-03-04 20:37 ` Jiri Olsa
2019-03-04 20:43 ` Song Liu
2019-02-28 5:06 ` [PATCH v5 perf,bpf 13/15] perf, bpf: process PERF_BPF_EVENT_PROG_LOAD for annotation Song Liu
2019-03-04 13:53 ` Jiri Olsa
2019-02-28 5:06 ` [PATCH v5 perf,bpf 14/15] perf: introduce side band thread Song Liu
2019-02-28 5:06 ` [PATCH v5 perf,bpf 15/15] perf, bpf: save bpf_prog_info and btf of short living bpf programs Song Liu
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