From: Ingo Molnar <mingo@elte.hu>
To: Pavel Machek <pavel@suse.cz>
Cc: "Kok, Auke" <auke-jan.h.kok@intel.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
powertop ml <power@bughost.org>,
Arjan van de Ven <arjan@linux.intel.com>,
srostedt@redhat.com
Subject: Re: [PATCH] tracer for sys_open() - sreadahead
Date: Tue, 3 Feb 2009 14:32:51 +0100 [thread overview]
Message-ID: <20090203133251.GD29046@elte.hu> (raw)
In-Reply-To: <20090130202219.GA1253@ucw.cz>
* Pavel Machek <pavel@suse.cz> wrote:
> On Tue 2009-01-27 12:08:04, Kok, Auke wrote:
> >
> > This tracer monitors regular file open() syscalls. This is a fast
> > and low-overhead alternative to strace, and does not allow or
> > require to be attached to every process.
> >
> > The tracer only logs succesfull calls, as those are the only ones we
> > are currently interested in, and we can determine the absolute path
> > of these files as we log.
>
> Maybe fanotify() should be used instead?
>
> Or maybe just plain strace? One slow boot should not really hurt...
ptrace is out of question for good tracing because it's not a transparent
probe. (ptrace monopolizes the traced task - if we use that then we break
regular strace usage.)
Ingo
next prev parent reply other threads:[~2009-02-03 13:33 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-01-27 20:08 [PATCH] tracer for sys_open() - sreadahead Kok, Auke
2009-01-27 20:51 ` Arnaldo Carvalho de Melo
2009-01-27 21:14 ` Frederic Weisbecker
2009-01-28 22:05 ` Kok, Auke
2009-01-29 0:45 ` Arnaldo Carvalho de Melo
2009-01-29 13:39 ` Frédéric Weisbecker
2009-01-29 13:40 ` Frédéric Weisbecker
2009-01-27 22:43 ` Frederic Weisbecker
2009-01-27 22:50 ` Frederic Weisbecker
2009-01-29 14:04 ` Ingo Molnar
2009-01-29 14:29 ` Frédéric Weisbecker
2009-01-29 14:31 ` Ingo Molnar
2009-01-29 14:40 ` Frédéric Weisbecker
2009-01-29 14:48 ` Frédéric Weisbecker
2009-01-29 15:09 ` Ingo Molnar
2009-01-29 15:17 ` Frédéric Weisbecker
2009-01-29 15:34 ` Frédéric Weisbecker
2009-01-29 15:53 ` Frank Ch. Eigler
2009-01-28 0:43 ` Frank Ch. Eigler
2009-01-28 13:58 ` Frédéric Weisbecker
2009-01-28 14:29 ` Arnaldo Carvalho de Melo
2009-01-28 9:38 ` Ananth N Mavinakayanahalli
2009-01-28 14:21 ` Frédéric Weisbecker
2009-01-28 17:00 ` Ananth N Mavinakayanahalli
2009-01-28 17:15 ` Frédéric Weisbecker
2009-01-28 22:19 ` Kok, Auke
2009-01-30 20:22 ` Pavel Machek
2009-02-03 13:32 ` Ingo Molnar [this message]
2009-02-05 14:44 ` Harald Hoyer
2009-02-05 15:07 ` Bill Nottingham
2009-02-05 15:14 ` Arjan van de Ven
2009-02-05 15:24 ` Bill Nottingham
2009-02-05 15:47 ` Arjan van de Ven
2009-02-06 23:18 ` Corrado Zoccolo
2009-02-09 13:13 ` Karel Zak
2009-02-09 13:23 ` Harald Hoyer
2009-02-09 13:54 ` Karel Zak
2009-02-11 10:44 ` Harald Hoyer
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