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perf data: Add description of header HEADER_BPF_PROG_INFO and HEADER_BPF_BTF

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This patch addes description of HEADER_BPF_PROG_INFO and HEADER_BPF_BTF to
perf.data-file-format.txt.

Requested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Song Liu <songliubraving@fb.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Fixes: 606f972b13 ("perf bpf: Save bpf_prog_info information as headers to perf.data")
Link: http://lkml.kernel.org/r/20190521064406.2498925-1-songliubraving@fb.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Song Liu 2019-05-20 23:44:06 -07:00 committed by Arnaldo Carvalho de Melo
parent 3384c78631
commit 8e21be4f81
1 changed files with 16 additions and 0 deletions
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16
tools/perf/Documentation/perf.data-file-format.txt
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@ -272,6 +272,22 @@ struct {
Two uint64_t for the time of first sample and the time of last sample.
HEADER_BPF_PROG_INFO = 25,
struct bpf_prog_info_linear, which contains detailed information about
a BPF program, including type, id, tag, jited/xlated instructions, etc.
HEADER_BPF_BTF = 26,
Contains BPF Type Format (BTF). For more information about BTF, please
refer to Documentation/bpf/btf.rst.
struct {
u32 id;
u32 data_size;
char data[];
};
HEADER_COMPRESSED = 27,
struct {