From mboxrd@z Thu Jan  1 00:00:00 1970
From: fche@redhat.com (Frank Ch. Eigler)
Date: Tue, 15 Feb 2011 12:39:25 -0500
Subject: [ltt-dev] LTTng-UST vs SystemTap userspace tracing benchmarks
In-Reply-To: <20110215165429.GA27627@Krystal> (Mathieu Desnoyers's message of
	"Tue, 15 Feb 2011 11:54:29 -0500")
References: <4D5AA164.1050607@polymtl.ca> <y0mvd0ltgba.fsf@fche.csb>
	<20110215165429.GA27627@Krystal>
Message-ID: <y0mfwrptcxe.fsf@fche.csb>


Hi -


mathieu.desnoyers wrote:

> [...]
>> This is not that surprising, considering how the two tools work.  UST
>> does its work in userspace,
> This first part of the statement is true,
>
>> and is therefore focused on an individual process's activities.
> This is incorrect. LTTng and UST gather traces from multiple processes and from
> the kernel, and merge them in post-processing. [...]

Isn't such after-the-fact merging out of scope of the present
microbenchmark, and in any case applicable to both tools?

- FChE