linux-kernel - Re: [PATCH 0/11] LTTng-core (basic tracing infrastructure) 0.5.108

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Message-ID: <20060925153949.GA10285@elte.hu>
Date:	Mon, 25 Sep 2006 17:39:49 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Chuck Ebbert <76306.1226@...puserve.com>
Cc:	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 0/11] LTTng-core (basic tracing infrastructure) 0.5.108


Chuck,

i cannot email you because the mail always bounces ...

the kprobes benchmark is a simple "NOP" function:

 static int counter = 0;

 static int probe_pre_handler (struct kprobe * kp,
                               struct pt_regs * regs)
 {
         counter++;
         return 0;
 }

i've attached it.

	Ingo

* Chuck Ebbert <76306.1226@...puserve.com> wrote:

> In-Reply-To: <20060918151713.GA11495@...e.hu>
> 
> On Mon, 18 Sep 2006 17:17:13 +0200, Ingo Molnar wrote:
> 
> > yeah - and i dont think the kprobes overhead is a fundamental thing - i 
> > posted a few kprobes-speedup patches as a reply to your measurements.
> 
> Where is the source code for the kprobes benchmarks you used?
> 
> -- 
> Chuck

View attachment "noop_kprobe.c" of type "text/plain" (1015 bytes)