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Re: [PATCH] x86: add the debugfs interface for the sysprof tool

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From: Soeren Sandmann <sandmann@...>
To: John Levon <levon@...>
Cc: Ingo Molnar <mingo@...>, Andrew Morton <akpm@...>, Arjan van de Ven <arjan@...>, <linux-kernel@...>, <tglx@...>, <hpa@...>
Subject: Re: [PATCH] x86: add the debugfs interface for the sysprof tool
Date: Saturday, February 23, 2008 - 4:15 pm

John Levon <levon@movementarian.org> writes:


This is not accurate. Sysprof started by me adding a hierarchical call
view to speedprof, a SIGPROF profiler which was basically a hack in
memprof.

Oprofile did not work on my system at the time (Red Hat 9, I believe),
and the website said that I had to apply a patch to the kernel and
recompile, so I didn't try it.

The hierarchical call view in speedprof worked out so well that I
wrote a simple kernel module to produce system-wide stacktraces, and
fed them into speedprof. Since speedprof was just a hack in memprof, I
wrote a new GUI, and sysprof was born.

It was only later I tried oprofile and found it not only much more
difficult to use, but also much less useful when I did get it to work.


Soren
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Messages in current thread:
[PATCH] x86: add the debugfs interface for the sysprof tool, Arjan van de Ven, (Tue Feb 19, 4:37 pm)
Re: [PATCH] x86: add the debugfs interface for the sysprof t..., Andrew Morton, (Sat Feb 23, 4:11 am)
Re: [PATCH] x86: add the debugfs interface for the sysprof t..., Pekka Enberg, (Sat Feb 23, 10:54 am)
Re: [PATCH] x86: add the debugfs interface for the sysprof t..., Andrew Morton, (Sat Feb 23, 3:01 pm)
Re: [PATCH] x86: add the debugfs interface for the sysprof t..., Pekka Enberg, (Sat Feb 23, 7:51 am)
Re: [PATCH] x86: add the debugfs interface for the sysprof t..., Andrew Morton, (Sat Feb 23, 2:46 pm)
Re: [PATCH] x86: add the debugfs interface for the sysprof t..., Pekka Enberg, (Sat Feb 23, 10:49 pm)
Re: [PATCH] x86: add the debugfs interface for the sysprof t..., Nicholas Miell, (Sat Feb 23, 11:12 pm)
Re: [PATCH] x86: add the debugfs interface for the sysprof t..., Pekka Enberg, (Tue Feb 26, 2:27 am)
Re: [PATCH] x86: add the debugfs interface for the sysprof t..., Pekka Enberg, (Tue Feb 26, 2:48 am)
Re: [PATCH] x86: add the debugfs interface for the sysprof t..., Ingo Molnar, (Tue Feb 26, 4:55 am)
Re: [PATCH] x86: add the debugfs interface for the sysprof t..., Ingo Molnar, (Sat Feb 23, 8:22 am)
Re: [PATCH] x86: add the debugfs interface for the sysprof t..., Pekka Enberg, (Sat Feb 23, 8:29 am)
Re: [PATCH] x86: add the debugfs interface for the sysprof t..., Ingo Molnar, (Sat Feb 23, 7:37 am)
Re: [PATCH] x86: add the debugfs interface for the sysprof t..., Andrew Morton, (Sat Feb 23, 2:40 pm)
Re: [PATCH] x86: add the debugfs interface for the sysprof t..., John Levon, (Sat Feb 23, 9:53 am)
Re: [PATCH] x86: add the debugfs interface for the sysprof t..., Theodore Tso, (Sun Feb 24, 9:10 am)
Re: [PATCH] x86: add the debugfs interface for the sysprof t..., John Levon, (Sun Feb 24, 12:32 pm)
Re: [PATCH] x86: add the debugfs interface for the sysprof t..., Theodore Tso, (Sun Feb 24, 2:19 pm)
Re: [PATCH] x86: add the debugfs interface for the sysprof t..., Ingo Molnar, (Sun Feb 24, 9:44 am)
Re: [PATCH] x86: add the debugfs interface for the sysprof t..., Ingo Molnar, (Sun Feb 24, 10:33 am)
Re: [PATCH] x86: add the debugfs interface for the sysprof t..., Soeren Sandmann, (Sat Feb 23, 4:15 pm)
Re: [PATCH] x86: add the debugfs interface for the sysprof t..., Anton Blanchard, (Tue Feb 26, 1:13 am)
Re: [PATCH] x86: add the debugfs interface for the sysprof t..., Ingo Molnar, (Tue Feb 26, 5:02 am)
Re: [PATCH] x86: add the debugfs interface for the sysprof t..., Anton Blanchard, (Wed Feb 27, 10:05 am)
Re: [PATCH] x86: add the debugfs interface for the sysprof t..., Andrew Morton, (Tue Feb 26, 1:29 pm)
Re: [PATCH] x86: add the debugfs interface for the sysprof t..., Andrew Morton, (Sat Feb 23, 4:42 pm)
Re: [PATCH] x86: add the debugfs interface for the sysprof t..., Ingo Molnar, (Sat Feb 23, 11:50 am)
Re: [PATCH] x86: add the debugfs interface for the sysprof t..., Peter Zijlstra, (Wed Feb 20, 2:16 pm)
Re: [PATCH] x86: add the debugfs interface for the sysprof t..., Arjan van de Ven, (Wed Feb 20, 2:39 pm)
Re: [PATCH] x86: add the debugfs interface for the sysprof t..., Peter Zijlstra, (Wed Feb 20, 2:53 pm)
Re: [PATCH] x86: add the debugfs interface for the sysprof t..., Arjan van de Ven, (Wed Feb 20, 3:26 pm)
Re: [PATCH] x86: add the debugfs interface for the sysprof t..., Peter Zijlstra, (Wed Feb 20, 4:58 pm)
Re: [PATCH] x86: add the debugfs interface for the sysprof t..., Arjan van de Ven, (Wed Feb 20, 5:07 pm)
Re: [PATCH] x86: add the debugfs interface for the sysprof t..., Peter Zijlstra, (Wed Feb 20, 5:44 pm)
Re: [PATCH] x86: add the debugfs interface for the sysprof t..., Arjan van de Ven, (Wed Feb 20, 6:36 pm)
Re: [PATCH] x86: add the debugfs interface for the sysprof t..., Peter Zijlstra, (Wed Feb 20, 2:58 pm)
Re: [PATCH] x86: add the debugfs interface for the sysprof t..., Anton Blanchard, (Tue Feb 26, 1:03 am)
Re: [PATCH] x86: add the debugfs interface for the sysprof t..., Ingo Molnar, (Wed Feb 20, 5:10 am)
Re: [PATCH] x86: add the debugfs interface for the sysprof t..., Anton Blanchard, (Tue Feb 26, 12:13 am)
Re: [PATCH] x86: add the debugfs interface for the sysprof t..., Ingo Molnar, (Tue Feb 26, 4:57 am)