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

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Message-ID: <4509AB9E.2090909@opersys.com>
Date:	Thu, 14 Sep 2006 15:21:02 -0400
From:	Karim Yaghmour <karim@...rsys.com>
To:	grundig <grundig@...eline.es>
CC:	"Martin J. Bligh" <mbligh@...igh.org>, mingo@...e.hu,
	mathieu.desnoyers@...ymtl.ca, linux-kernel@...r.kernel.org,
	hch@...radead.org, akpm@...l.org, mingo@...hat.com, gregkh@...e.de,
	tglx@...utronix.de, zanussi@...ibm.com, ltt-dev@...fik.org,
	michel.dagenais@...ymtl.ca
Subject: Re: [PATCH 0/11] LTTng-core (basic tracing infrastructure) 0.5.108


grundig wrote:
> IOW, no distro will enable it by default to avoid the overhead,

Please bear in mind that this is an implementation issue. As I've
explained elsewhere, there are ways to implement this where even
compiled-in static tracepoints have practically no cost at all
-- being noops until enabling. Thereby being no justification for
not actually shipping with such built kernels and, therefore,
no reason why tools such as ltt can't real-world usage.

Karim

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