Messages in this thread | | | Subject | Re: [PATCH] x86: add the debugfs interface for the sysprof tool | From | Soeren Sandmann <> | Date | 23 Feb 2008 21:15:52 +0100 |
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John Levon <levon@movementarian.org> writes:
> Soren wrote sysprof when he tried an earlier version of oprofile and > found it slightly non-obvious. Instead of doing any of these things:
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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