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Re: [PATCH 02/22 -v7] Add basic support for gcc profiler instrumentation

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From: Jan Kiszka <jan.kiszka@...>
To: Steven Rostedt <rostedt@...>
Cc: LKML <linux-kernel@...>, Ingo Molnar <mingo@...>, Linus Torvalds <torvalds@...>, Andrew Morton <akpm@...>, Peter Zijlstra <a.p.zijlstra@...>, Christoph Hellwig <hch@...>, Mathieu Desnoyers <mathieu.desnoyers@...>, Gregory Haskins <ghaskins@...>, Arnaldo Carvalho de Melo <acme@...>, Thomas Gleixner <tglx@...>, Tim Bird <tim.bird@...>, Sam Ravnborg <sam@...>, Frank Ch. Eigler <fche@...>, John Stultz <johnstul@...>, Arjan van de Ven <arjan@...>, Steven Rostedt <srostedt@...>
Subject: Re: [PATCH 02/22 -v7] Add basic support for gcc profiler instrumentation
Date: Wednesday, January 30, 2008 - 9:21 am

Steven Rostedt wrote:


(and the corresponding 64-bit version)

Is the impact of this change on the (already expensive) mcount_enabled
case negligible? I worried about use cases where we want to gain some
(relative) worst-case numbers via these instrumentations.

In my personal priority scheme, CONFIG_MCOUNT=y && !mcount_enabled comes
after mcount_enabled.

Jan

-- 
Siemens AG, Corporate Technology, CT SE 2
Corporate Competence Center Embedded Linux
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Messages in current thread:
[PATCH 02/22 -v7] Add basic support for gcc profiler instrum..., Steven Rostedt, (Tue Jan 29, 11:15 pm)
Re: [PATCH 02/22 -v7] Add basic support for gcc profiler ins..., Jan Kiszka, (Wed Jan 30, 9:21 am)
Re: [PATCH 02/22 -v7] Add basic support for gcc profiler ins..., Steven Rostedt, (Wed Jan 30, 9:53 am)
Re: [PATCH 02/22 -v7] Add basic support for gcc profiler ins..., Steven Rostedt, (Wed Jan 30, 10:28 am)
Re: [PATCH 02/22 -v7] Add basic support for gcc profiler ins..., Peter Zijlstra, (Wed Jan 30, 4:46 am)
Re: [PATCH 02/22 -v7] Add basic support for gcc profiler ins..., Steven Rostedt, (Wed Jan 30, 9:08 am)
Re: [PATCH 02/22 -v7] Add basic support for gcc profiler ins..., Steven Rostedt, (Wed Jan 30, 10:09 am)
Re: [PATCH 02/22 -v7] Add basic support for gcc profiler ins..., Peter Zijlstra, (Wed Jan 30, 10:25 am)
Re: [PATCH 02/22 -v7] Add basic support for gcc profiler ins..., Paul E. McKenney, (Fri Feb 1, 6:34 pm)
Re: [PATCH 02/22 -v7] Add basic support for gcc profiler ins..., Steven Rostedt, (Fri Feb 1, 9:56 pm)
Re: [PATCH 02/22 -v7] Add basic support for gcc profiler ins..., Paul E. McKenney, (Sat Feb 2, 5:41 pm)
Re: [PATCH 02/22 -v7] Add basic support for gcc profiler ins..., Steven Rostedt, (Mon Feb 4, 1:09 pm)
Re: [PATCH 02/22 -v7] Add basic support for gcc profiler ins..., Paul E. McKenney, (Mon Feb 4, 5:40 pm)
Re: [PATCH 02/22 -v7] Add basic support for gcc profiler ins..., Steven Rostedt, (Mon Feb 4, 6:03 pm)
Re: [PATCH 02/22 -v7] Add basic support for gcc profiler ins..., Paul E. McKenney, (Tue Feb 5, 1:13 am)
Re: [PATCH 02/22 -v7] Add basic support for gcc profiler ins..., Mathieu Desnoyers, (Mon Feb 4, 6:41 pm)
Re: [PATCH 02/22 -v7] Add basic support for gcc profiler ins..., Paul E. McKenney, (Tue Feb 5, 2:11 am)