Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753801AbZGJGrE (ORCPT ); Fri, 10 Jul 2009 02:47:04 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750743AbZGJGqx (ORCPT ); Fri, 10 Jul 2009 02:46:53 -0400 Received: from cn.fujitsu.com ([222.73.24.84]:56408 "EHLO song.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1750722AbZGJGqw (ORCPT ); Fri, 10 Jul 2009 02:46:52 -0400 Message-ID: <4A56E3D8.3010806@cn.fujitsu.com> Date: Fri, 10 Jul 2009 14:46:48 +0800 From: Li Zefan User-Agent: Thunderbird 2.0.0.9 (X11/20071115) MIME-Version: 1.0 To: Masami Hiramatsu CC: Ingo Molnar , Steven Rostedt , lkml , systemtap , kvm , DLE , Ananth N Mavinakayanahalli , Christoph Hellwig , Frederic Weisbecker , Tom Zanussi Subject: Re: [PATCH -tip -v11 11/11] tracing: Add kprobes event profiling interface References: <20090709202220.13223.97114.stgit@localhost.localdomain> <20090709202327.13223.16418.stgit@localhost.localdomain> In-Reply-To: <20090709202327.13223.16418.stgit@localhost.localdomain> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 964 Lines: 35 > +Event Profiling > +--------------- > + You can check the total number of probe hits and probe miss-hits via > +/sys/kernel/debug/tracing/kprobe_profile. > + The fist column is event name, the second is the number of probe hits, s/fist/first > +the third is the number of probe miss-hits. > + > + ... > +/* Probes profiling interfaces */ > +static int profile_seq_show(struct seq_file *m, void *v) > +{ > + struct trace_probe *tp = v; > + > + if (tp == NULL) > + return 0; > + tp will never be NULL, which is guaranteed by seq_file > + seq_printf(m, "%s", tp->call.name); > + > + seq_printf(m, "\t%8lu %8lu\n", tp->nhits, > + probe_is_return(tp) ? tp->rp.kp.nmissed : tp->kp.nmissed); > + > + return 0; > +} -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/