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 127FF1103 for ; Thu, 7 Sep 2023 07:14:19 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6A230C43397; Thu, 7 Sep 2023 07:14:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1694070859; bh=2Gal9YY4w+v6bXzG62x8DTxB8s/+kBykYRSPovkr24I=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=SODymRU8NJAixYyJWG/Z60aS50hNGFdZwY3MrN92L7xHW6QCFfTeRZYpo+wbLQOMA pIxQehqlPoJdS+cfWU7cekfMnenWZcO+zCgJqsb6a5eH/bp8UhejCSTvLs22/VhRbt rbqzIxuf/FytyNEe5a1idUwjeqc22w26Fj7DmBykfOPQj88GepcJSIZkPvtmQJZIoc 5Ng9iovP2hXuGW3DmxALkiyeEkDI/tf/ezMJ9d17vusnwS23BhsykjySGdFkaACpPZ KIAx+WJK76NlBxT7srgMDQelL2qVbuFmiNEZY+fbj9xLVCs6Crb52O/6iUIl5iE6Pq 6DtbHvXewFbqQ== From: Jiri Olsa To: Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko Cc: Quentin Monnet , bpf@vger.kernel.org, Martin KaFai Lau , Song Liu , Yonghong Song , John Fastabend , KP Singh , Stanislav Fomichev , Hao Luo , Hou Tao , Daniel Xu Subject: [PATCHv2 bpf-next 6/9] bpftool: Display missed count for kprobe perf link Date: Thu, 7 Sep 2023 09:13:08 +0200 Message-ID: <20230907071311.254313-7-jolsa@kernel.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230907071311.254313-1-jolsa@kernel.org> References: <20230907071311.254313-1-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 } ] Reviewed-by: Quentin Monnet 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 d15d74cd1bed..4b1407b05056 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