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Re: [RFC PATCH 1/2] Marker probes in futex.c

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From: Frank Ch. Eigler <fche@...>
To: Ingo Molnar <mingo@...>
Cc: Mathieu Desnoyers <mathieu.desnoyers@...>, Peter Zijlstra <a.p.zijlstra@...>, <prasad@...>, <linux-kernel@...>, <tglx@...>, Christoph Hellwig <hch@...>
Subject: Re: [RFC PATCH 1/2] Marker probes in futex.c
Date: Tuesday, April 15, 2008 - 10:21 am

Hi -

On Tue, Apr 15, 2008 at 04:04:30PM +0200, Ingo Molnar wrote:

For example, by measuring how much of that "bloat" is actually
experienced (e.g., in the form of presence in cache or additional time
taken.) when that instrumentation is turned off vs. on.  That should
sound familiar, as this is the sort of data that you outlined (but I
don't recall whether you actually provided numbers/recipes) when
describing the "dyn-ftrace" nop-padding work.

- FChE
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Messages in current thread:
[RFC PATCH 0/2] Debugging infrastructure for Futexes using M..., K. Prasad, (Tue Apr 15, 7:50 am)
[RFC PATCH 1/2] Marker probes in futex.c, K. Prasad, (Tue Apr 15, 7:53 am)
Re: [RFC PATCH 1/2] Marker probes in futex.c, Peter Zijlstra, (Tue Apr 15, 8:02 am)
Re: [RFC PATCH 1/2] Marker probes in futex.c, Andrew Morton, (Fri Apr 18, 6:44 am)
Re: [RFC PATCH 1/2] Marker probes in futex.c, K. Prasad, (Tue Apr 15, 11:52 am)
Re: [RFC PATCH 1/2] Marker probes in futex.c, Peter Zijlstra, (Wed Apr 16, 11:51 am)
Re: [RFC PATCH 1/2] Marker probes in futex.c, Frank Ch. Eigler, (Thu Apr 17, 6:02 pm)
Re: [RFC PATCH 1/2] Marker probes in futex.c, Peter Zijlstra, (Fri Apr 18, 2:46 am)
Re: [RFC PATCH 1/2] Marker probes in futex.c, Mathieu Desnoyers, (Sat Apr 19, 10:13 am)
Re: [RFC PATCH 1/2] Marker probes in futex.c, Peter Zijlstra, (Sat Apr 19, 10:56 am)
Re: [RFC PATCH 1/2] Marker probes in futex.c, Frank Ch. Eigler, (Fri Apr 18, 10:29 am)
Re: [RFC PATCH 1/2] Marker probes in futex.c, Peter Zijlstra, (Sat Apr 19, 10:52 am)
Re: [RFC PATCH 1/2] Marker probes in futex.c, Frank Ch. Eigler, (Sat Apr 19, 2:03 pm)
Re: [RFC PATCH 1/2] Marker probes in futex.c, Peter Zijlstra, (Sat Apr 19, 2:29 pm)
Re: [RFC PATCH 1/2] Marker probes in futex.c, Frank Ch. Eigler, (Sat Apr 19, 2:48 pm)
Re: [RFC PATCH 1/2] Marker probes in futex.c, Nicholas Miell, (Tue Apr 22, 1:50 pm)
Re: [RFC PATCH 1/2] Marker probes in futex.c, K. Prasad, (Sat Apr 19, 8:28 am)
Re: [RFC PATCH 1/2] Marker probes in futex.c, Mathieu Desnoyers, (Tue Apr 15, 8:32 am)
Re: [RFC PATCH 1/2] Marker probes in futex.c, Peter Zijlstra, (Tue Apr 15, 8:56 am)
Re: [RFC PATCH 1/2] Marker probes in futex.c, Mathieu Desnoyers, (Tue Apr 15, 9:25 am)
Re: [RFC PATCH 1/2] Marker probes in futex.c, Peter Zijlstra, (Wed Apr 16, 11:51 am)
Re: [RFC PATCH 1/2] Marker probes in futex.c, Frank Ch. Eigler, (Thu Apr 17, 3:19 pm)
Re: [RFC PATCH 1/2] Marker probes in futex.c, Peter Zijlstra, (Fri Apr 18, 2:56 am)
Re: [RFC PATCH 1/2] Marker probes in futex.c, Mathieu Desnoyers, (Thu Apr 17, 4:16 pm)
Re: [RFC PATCH 1/2] Marker probes in futex.c, K. Prasad, (Sat Apr 19, 8:13 am)
Re: [RFC PATCH 1/2] Marker probes in futex.c, Mathieu Desnoyers, (Sat Apr 19, 5:33 pm)
Re: [RFC PATCH 1/2] Marker probes in futex.c, Ingo Molnar, (Tue Apr 15, 9:17 am)
Re: [RFC PATCH 1/2] Marker probes in futex.c, Mathieu Desnoyers, (Tue Apr 15, 9:47 am)
Re: [RFC PATCH 1/2] Marker probes in futex.c, Ingo Molnar, (Tue Apr 15, 12:48 pm)
Re: [RFC PATCH 1/2] Marker probes in futex.c, Mathieu Desnoyers, (Tue Apr 15, 5:38 pm)
Re: [RFC PATCH 1/2] Marker probes in futex.c, Ingo Molnar, (Wed Apr 16, 9:17 am)
text_poke, vmap and vmalloc on x86_64, Mathieu Desnoyers, (Wed Apr 16, 4:10 pm)
Re: text_poke, vmap and vmalloc on x86_64, Mathieu Desnoyers, (Wed Apr 16, 5:22 pm)
Re: [RFC PATCH 1/2] Marker probes in futex.c, Arjan van de Ven, (Wed Apr 16, 9:46 am)
Re: [RFC PATCH 1/2] Marker probes in futex.c, Mathieu Desnoyers, (Wed Apr 16, 10:00 am)
Re: [RFC PATCH 1/2] Marker probes in futex.c, Arjan van de Ven, (Wed Apr 16, 10:24 am)
Re: [RFC PATCH 1/2] Marker probes in futex.c, Mathieu Desnoyers, (Wed Apr 16, 10:48 am)
Re: [RFC PATCH 1/2] Marker probes in futex.c, Arjan van de Ven, (Wed Apr 16, 11:32 am)
Re: [RFC PATCH 1/2] Marker probes in futex.c, Mathieu Desnoyers, (Wed Apr 16, 11:39 am)
Re: [RFC PATCH 1/2] Marker probes in futex.c, Ingo Molnar, (Wed Apr 16, 10:29 am)
Re: [RFC PATCH 1/2] Marker probes in futex.c, Ingo Molnar, (Tue Apr 15, 10:04 am)
Re: [RFC PATCH 1/2] Marker probes in futex.c, Mathieu Desnoyers, (Tue Apr 15, 10:39 am)
Re: [RFC PATCH 1/2] Marker probes in futex.c, Frank Ch. Eigler, (Tue Apr 15, 10:21 am)
Re: [RFC PATCH 1/2] Marker probes in futex.c, Alexey Dobriyan, (Tue Apr 15, 8:50 am)
Re: [RFC PATCH 1/2] Marker probes in futex.c, K. Prasad, (Tue Apr 15, 12:13 pm)
[RFC PATCH 2/2] Marker handler for the probes in futex file, K. Prasad, (Tue Apr 15, 7:55 am)