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

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Message-ID: <450E56ED.5050201@sgi.com>
Date:	Mon, 18 Sep 2006 10:21:01 +0200
From:	Jes Sorensen <jes@....com>
To:	karim@...rsys.com
Cc:	Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>,
	Ingo Molnar <mingo@...e.hu>,
	Roman Zippel <zippel@...ux-m68k.org>,
	Andrew Morton <akpm@...l.org>, tglx@...utronix.de,
	Paul Mundt <lethal@...ux-sh.org>, linux-kernel@...r.kernel.org,
	Christoph Hellwig <hch@...radead.org>,
	Ingo Molnar <mingo@...hat.com>,
	Greg Kroah-Hartman <gregkh@...e.de>,
	Tom Zanussi <zanussi@...ibm.com>, ltt-dev@...fik.org,
	Michel Dagenais <michel.dagenais@...ymtl.ca>
Subject: Re: [PATCH 0/11] LTTng-core (basic tracing infrastructure) 0.5.108

Karim Yaghmour wrote:
> Mathieu Desnoyers wrote:
>> The bottom line is :
>>
>> LTTng impact on the studied phenomenon : 35% slower
>>
>> LTTng+kprobes impact on the studied phenomenon : 73% slower
>>
>> Therefore, I conclude that on this type of high event rate workload, kprobes
>> doubles the tracer impact on the system.
> 
> Amen to that. Hopefully this puts to rest the myth of Mr. Scrub.

If it wasn't because it's so sad, this would be hysterically funny.

Jes


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