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From: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
To: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Ingo Molnar <mingo@elte.hu>, Steven Rostedt <rostedt@goodmis.org>,
	        lkml<linux-kernel@vger.kernel.org>,
	        systemtap<systemtap@sources.redhat.com>,
	kvm<kvm@vger.kernel.org>,
	        DLE<dle-develop@lists.sourceforge.net>,
	        Christoph Hellwig <hch@infradead.org>,
	        Frederic Weisbecker <fweisbec@gmail.com>,
	        Tom Zanussi <tzanussi@gmail.com>
Subject: Re: [PATCH -tip -v11 11/11] tracing: Add kprobes event profiling 	interface
Date: Fri, 10 Jul 2009 10:47:27 +0530
Message-ID: <20090710051727.GA1745@in.ibm.com> (raw)
In-Reply-To: <20090709202327.13223.16418.stgit@localhost.localdomain>

On Thu, Jul 09, 2009 at 04:23:27PM -0400, Masami Hiramatsu wrote:
> Add profiling interaces for each kprobes event.

...

>  /* Kprobe handler */
>  static __kprobes int kprobe_trace_func(struct kprobe *kp, struct pt_regs *regs)
>  {
> @@ -772,6 +809,8 @@ static __kprobes int kprobe_trace_func(struct kprobe *kp, struct pt_regs *regs)
>  	unsigned long irq_flags;
>  	struct ftrace_event_call *call = &tp->call;
> 
> +	tp->nhits++;
> +

If you just are looking for a count and aren't bothered about its
accuracy, this is fine. Else, handlers can run in parallel ;-)

Ananth

  reply index

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-07-09 20:22 [PATCH -tip -v11 00/11] tracing: kprobe-based event tracer and x86 instruction decoder Masami Hiramatsu
2009-07-09 20:22 ` [PATCH -tip -v11 01/11] x86: instruction decoder API Masami Hiramatsu
2009-07-09 20:22 ` [PATCH -tip -v11 02/11] x86: x86 instruction decoder build-time selftest Masami Hiramatsu
2009-07-09 20:22 ` [PATCH -tip -v11 03/11] kprobes: checks probe address is instruction boudary on x86 Masami Hiramatsu
2009-07-09 20:22 ` [PATCH -tip -v11 04/11] kprobes: cleanup fix_riprel() using insn decoder " Masami Hiramatsu
2009-07-09 20:22 ` [PATCH -tip -v11 05/11] x86: add pt_regs register and stack access APIs Masami Hiramatsu
2009-07-09 20:22 ` [PATCH -tip -v11 06/11] tracing: ftrace dynamic ftrace_event_call support Masami Hiramatsu
2009-07-09 20:23 ` [PATCH -tip -v11 07/11] tracing: Introduce TRACE_FIELD_ZERO() macro Masami Hiramatsu
2009-07-09 20:23 ` [PATCH -tip -v11 08/11] tracing: add kprobe-based event tracer Masami Hiramatsu
2009-07-10  7:13   ` Li Zefan
2009-07-10 20:33     ` Masami Hiramatsu
2009-07-09 20:23 ` [PATCH -tip -v11 09/11] tracing: Kprobe-tracer supports more than 6 arguments Masami Hiramatsu
2009-07-09 20:23 ` [PATCH -tip -v11 10/11] tracing: Generate names for each kprobe event automatically Masami Hiramatsu
2009-07-09 20:23 ` [PATCH -tip -v11 11/11] tracing: Add kprobes event profiling interface Masami Hiramatsu
2009-07-10  5:17   ` Ananth N Mavinakayanahalli [this message]
2009-07-10  6:46   ` Li Zefan
2009-07-10 19:59     ` Masami Hiramatsu

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