Re: Profiling GTK within an application

[Binary Chen <binary chen gmail com>]

On Sat, 2007-10-27 at 11:06 +0300, Stefan Kost wrote:
> Chris Rorvick schrieb:
> > I'm attempting to profile GTK in an application and I'm wondering what 
> > methodology others use to accomplish this.  Is there any documentation 
> > that addresses this topic that I should refer to?  Any caveats worth 
> > pointing out?  Here is where I'm at ...
> >
> > I recently upgraded an application using GTK 2.6 to use GTK 2.10, 
> > quickly followed by an upgrade to 2.12.  In both cases, the upgraded 
> > version of the application consumed 3-5x the CPU as compared to the 
> > original version using 2.6.  This comparison was done anecdotally using 
> > top on a Solaris workstation.
> This is most likely caused by cairo. You should also see a bit less CPU usage in
> 2.12 compared to 2.10 (or more precise newer cairo should perform a bit better).
Which version of cairo will cause this problem, more precise?

> > My first step was to have profiled versions of these libraries built in 
> > the hope that I could use them to isolate where the additional cycles 
> > were being burned.  Several builds and profiled runs later, and after a 
> > fair amount of searching the Internet, I've concluded that I'll never 
> > get anything out of shared objects instrumented with GCC; all code to be 
> > profiled must be statically linked.  If you know this to be untrue, 
> > please let me know!  :)  My plan now is to build static versions of all 
> > GTK libraries instrumented for profiling and link against those.
> I would suggest to use a sampling profiler, like oprofile, sysprof, but all
> those are linux profilers (they need a kernel module). But I am sure there a
> sampling profilers for solaris too. The advantage is that you don't need to
> recompile your apps (given you have debug symbols alreday) and it works with
> shared libs too.
>
> Stefan
>
>
> > FYI, Our platform is Solaris 10 (x86) compiling with GCC 3.4.
> >
> > Thanks in advance,
> >
> > Chris Rorvick
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