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Date: Wed, 20 Feb 2008 19:53:42 +0100 From: Peter Zijlstra <a.p.zijlstra@...llo.nl> To: Arjan van de Ven <arjan@...radead.org> Cc: linux-kernel@...r.kernel.org, mingo@...e.hu, sandmann@...hat.com, tglx@...x.de, hpa@...or.com Subject: Re: [PATCH] x86: add the debugfs interface for the sysprof tool On Wed, 2008-02-20 at 10:39 -0800, Arjan van de Ven wrote: > On Wed, 20 Feb 2008 19:16:15 +0100 > Peter Zijlstra <a.p.zijlstra@...llo.nl> wrote: > > > > > On Tue, 2008-02-19 at 12:37 -0800, Arjan van de Ven wrote: > > > From: Soren Sandmann <sandmann@...hat.com> > > > Subject: [PATCH] x86: add the debugfs interface for the sysprof tool > > > > > > The sysprof tool is a very easy to use GUI tool to find out where > > > userspace is spending CPU time. See > > > http://www.daimi.au.dk/~sandmann/sysprof/ > > > for more information and screenshots on this tool. > > > > > > Sysprof needs a 200 line kernel module to do it's work, this > > > module puts some simple profiling data into debugfs. > > > > What is the added value over oprofile? > > it actually works and is usable by humans ;) # sysprof (sysprof:12480): Gtk-WARNING **: cannot open display: -ENOX > what oprofile doesn't do is the nice userland hierarchy of where cpu time is spend. > (and that is also what makes it mostly useless in practice) so why not fix oprofile callgraph output and build a GUI on top of oprofile for those of us who really want RSI from mouse movement :-) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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