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    SubjectRe: [PATCH] x86: add the debugfs interface for the sysprof tool
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    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@chello.nl> wrote:
    >
    > >
    > > On Tue, 2008-02-19 at 12:37 -0800, Arjan van de Ven wrote:
    > > > From: Soren Sandmann <sandmann@redhat.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 :-)



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