linux-kernel - Re: [v2.6.26] what's brewing in x86.git for v2.6.26

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Message-ID: <20080418094239.GA26393@elte.hu>
Date:	Fri, 18 Apr 2008 11:42:39 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Tomasz Kłoczko <kloczek@...y.mif.pg.gda.pl>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Christoph Hellwig <hch@...radead.org>,
	Pekka Enberg <penberg@...helsinki.fi>,
	linux-kernel@...r.kernel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Arjan van de Ven <arjan@...radead.org>
Subject: Re: [v2.6.26] what's brewing in x86.git for v2.6.26


* Tomasz Kłoczko <kloczek@...y.mif.pg.gda.pl> wrote:

>> and you'll see the trace events go by, live. The user-space bits of 
>> sysprof have been ported over to ftrace/sysprof already and it's a 
>> really nice tool that shows a deep stack-trace based hierarchical 
>> "vertical" profile instead of the usual finegrained profile.
>
> Does it meany Linux give up implementing DTrace way of 
> tracing/instrumntation ? In last time I observe more and more signs 
> inroducing parallel ways of tracing/instrumentations infrasctructures 
> in Linux kernel where all this can be rolled into only one .. common. 

the goal of having more generic markers is still possible and being 
aimed for - for in-kernel utilization like SystemTap, lttng, utrace, 
ftrace and similar. The latest iteration of markers looks rather 
promising in terms of giving us near-zero-cost probe points.

(and last i checked dtrace was not capable of doing something like 
mmiotrace - so it's a different thing.)

so dont worry :)

	Ingo
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