From: ddaney@caviumnetworks.com (David Daney)
Subject: [ltt-dev] Porting "jump labels" to userspace
Date: Wed, 16 Feb 2011 12:17:28 -0800 [thread overview]
Message-ID: <4D5C30D8.8070107@caviumnetworks.com> (raw)
In-Reply-To: <20110216200449.1EB9618020E@magilla.sf.frob.com>
On 02/16/2011 12:04 PM, Roland McGrath wrote:
> IMHO there is not really so much to the in-kernel implementation that it's
> worth attempting to reuse the code in userland. Pretty much all the work
> is in the details of the implementation that would naturally differ a lot
> in a different context. If you understand the mechanism and the machine
> details, then implementing it well for a userland context is not a big deal
> and is cleaner to do from scratch than shoe-horning kernel-centric code
> into a wildly different context.
>
Good point.
Certainly the details of maintaining instruction cache coherency may be
different in userspace.
David Daney
next prev parent reply other threads:[~2011-02-16 20:17 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-02-15 15:53 [ltt-dev] LTTng-UST vs SystemTap userspace tracing benchmarks Julien Desfossez
2011-02-15 16:25 ` William Cohen
2011-02-17 16:20 ` Julien Desfossez
2011-02-15 16:26 ` Frank Ch. Eigler
2011-02-15 16:54 ` Mathieu Desnoyers
2011-02-15 17:39 ` Frank Ch. Eigler
2011-02-15 22:25 ` Mathieu Desnoyers
2011-02-15 17:00 ` Stefan Hajnoczi
2011-02-15 17:04 ` Mathieu Desnoyers
2011-02-16 10:56 ` Mark Wielaard
2011-02-16 18:50 ` Roland McGrath
2011-02-16 20:00 ` [ltt-dev] Porting "jump labels" to userspace (was: Re: LTTng-UST vs SystemTap userspace tracing benchmarks) Mathieu Desnoyers
2011-02-16 20:04 ` Roland McGrath
2011-02-16 20:17 ` David Daney [this message]
2011-02-16 20:39 ` [ltt-dev] Porting "jump labels" to userspace Mathieu Desnoyers
2011-02-16 20:45 ` Thomas Gleixner
2011-02-16 21:42 ` Peter Zijlstra
2011-02-17 13:58 ` Ingo Molnar
2011-02-16 20:14 ` David Daney
2011-02-16 20:36 ` Mathieu Desnoyers
2011-02-16 20:55 ` [ltt-dev] LTTng-UST vs SystemTap userspace tracing benchmarks Stefan Hajnoczi
2011-02-16 21:05 ` Mathieu Desnoyers
2011-02-16 21:16 ` Mark Wielaard
2011-02-15 17:03 ` Mark Wielaard
2011-02-16 15:30 ` Tom Tromey
2011-02-16 18:19 ` Roland McGrath
2011-02-17 17:33 ` Julien Desfossez
2011-02-17 19:11 ` Josh Stone
2011-02-17 19:33 ` Julien Desfossez
2011-02-17 19:47 ` Josh Stone
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