From mboxrd@z Thu Jan 1 00:00:00 1970 From: Masami Hiramatsu Subject: [RFC PATCH tip/master 1/3] trace: kprobes: Show sum of probe/retprobe nmissed count Date: Wed, 29 Mar 2017 14:22:02 +0900 Message-ID: <149076491191.24574.9187877160820798843.stgit@devbox> References: <149076484118.24574.7083269903420611708.stgit@devbox> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Cc: Alban Crequy , Alban Crequy , Alexei Starovoitov , Jonathan Corbet , Arnaldo Carvalho de Melo , Omar Sandoval , linux-doc@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, iago@kinvolk.io, michael@kinvolk.io, Dorau Lukasz , systemtap@sourceware.org To: Steven Rostedt , Ingo Molnar Return-path: In-Reply-To: <149076484118.24574.7083269903420611708.stgit@devbox> Sender: linux-doc-owner@vger.kernel.org List-Id: netdev.vger.kernel.org Show sum of probe and retprobe nmissed count in kprobe_profile, since retprobe can be missed even if the kprobe itself succeeeded. This explains user why their return probe didn't hit sometimes. Signed-off-by: Masami Hiramatsu --- kernel/trace/trace_kprobe.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c index 013f4e7..bbdc3de 100644 --- a/kernel/trace/trace_kprobe.c +++ b/kernel/trace/trace_kprobe.c @@ -896,7 +896,7 @@ static int probes_profile_seq_show(struct seq_file *m, void *v) seq_printf(m, " %-44s %15lu %15lu\n", trace_event_name(&tk->tp.call), trace_kprobe_nhit(tk), - tk->rp.kp.nmissed); + tk->rp.kp.nmissed + tk->rp.nmissed); return 0; }