From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A9F2510F4 for ; Mon, 28 Aug 2023 07:57:28 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 65024C433C8; Mon, 28 Aug 2023 07:57:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1693209448; bh=WuD3nVJvzDMB+7Fn5HVptRfTNFO79UdpuiRjIllL0xw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Q0Aw7O7Jv++IF8N+px5V+dQHINU9h3QXBKQVTzA+/UQU/m3gMKN6F1YvXM7AesSRZ Pq782jT8uNoOS68qEes8JQdDwBkn5/CvZRflui8+nB90Ekfx+k9HHTz6dXjI9PN6tq AxhFsuNDmk1CaG+z5xfhJPW3zc++bj26urZepzvLKqsIEZvpZxKUiKpjqpa7Q3keEP OJZhCKGeDGCjXzoFxG+wi742taunOAvCWXmbo0CuBVkoIKsiIQkyFx8kqNeyAEG1ti BstXifBxY+oYcT5Qttp9kplva3FBmybj+OP1ZRYYQkkjGxTsgEPtItW29cJ0rWT4UC cteh/kGpjl5MA== From: Jiri Olsa To: Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko Cc: bpf@vger.kernel.org, Martin KaFai Lau , Song Liu , Yonghong Song , John Fastabend , KP Singh , Stanislav Fomichev , Hao Luo , Hou Tao , Daniel Xu Subject: [PATCH bpf-next 10/12] bpftool: Display missed count for kprobe perf link Date: Mon, 28 Aug 2023 09:55:35 +0200 Message-ID: <20230828075537.194192-11-jolsa@kernel.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230828075537.194192-1-jolsa@kernel.org> References: <20230828075537.194192-1-jolsa@kernel.org> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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 --- tools/bpf/bpftool/link.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/tools/bpf/bpftool/link.c b/tools/bpf/bpftool/link.c index 7387e51a5e5c..d65129318f82 100644 --- a/tools/bpf/bpftool/link.c +++ b/tools/bpf/bpftool/link.c @@ -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(" "); } -- 2.41.0