diff options
| author | Jiri Olsa <jolsa@kernel.org> | 2023-09-20 23:31:42 +0200 |
|---|---|---|
| committer | Quentin Monnet <qmonnet+github@qoba.lt> | 2023-10-02 22:38:39 +0200 |
| commit | 58046e25de83903136d0f17938455a46624f3ad4 (patch) | |
| tree | 692d7c6c0cc7b4cf49309e02c7d8f7f470be0d0d | |
| parent | aa4f5fbcaaf8a41bce44a97ef4e2a05c8170eb95 (diff) | |
| download | bpftool-58046e25de83903136d0f17938455a46624f3ad4.tar.gz | |
bpftool: Display missed count for kprobe perf link
Adding 'missed' field to display missed counts for kprobes
attached by perf event link, like:
# bpftool link
5: perf_event prog 82
kprobe ffffffff815203e0 ksys_write
6: perf_event prog 83
kprobe ffffffff811d1e50 scheduler_tick missed 682217
# bpftool link -jp
[{
"id": 5,
"type": "perf_event",
"prog_id": 82,
"retprobe": false,
"addr": 18446744071584220128,
"func": "ksys_write",
"offset": 0,
"missed": 0
},{
"id": 6,
"type": "perf_event",
"prog_id": 83,
"retprobe": false,
"addr": 18446744071580753488,
"func": "scheduler_tick",
"offset": 0,
"missed": 693469
}
]
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Reviewed-by: Quentin Monnet <quentin@isovalent.com>
Link: https://lore.kernel.org/bpf/20230920213145.1941596-7-jolsa@kernel.org
| -rw-r--r-- | src/link.c | 3 |
1 files changed, 3 insertions, 0 deletions
@@ -302,6 +302,7 @@ show_perf_event_kprobe_json(struct bpf_link_info *info, json_writer_t *wtr) jsonw_string_field(wtr, "func", u64_to_ptr(info->perf_event.kprobe.func_name)); jsonw_uint_field(wtr, "offset", info->perf_event.kprobe.offset); + jsonw_uint_field(wtr, "missed", info->perf_event.kprobe.missed); } static void @@ -686,6 +687,8 @@ static void show_perf_event_kprobe_plain(struct bpf_link_info *info) printf("%s", buf); if (info->perf_event.kprobe.offset) printf("+%#x", info->perf_event.kprobe.offset); + if (info->perf_event.kprobe.missed) + printf(" missed %llu", info->perf_event.kprobe.missed); printf(" "); } |