[Freeswitch-dev] performance tuning

[Matt Klein]

pong

On Sat, 8 Dec 2007, trixter aka Bret McDanel wrote:

> I am wanting to do some performance tuning and wanted to enlist the help
> of others but would request that we do this in a coordinated way so that
> we dont duplicate effort and end up basically spending time on all the
> same sections of the code.
>
> I have been fighting gprof today which does not do multithreaded apps (I
> have tried some hacks to make it work, that failed).  I gave up when I
> discovered that intel has vtune free for non-commercial work.  Read the
> license carefully technically if you are paid by your employer to work
> on FS then you dont qualify (but can still get an eval copy).
>
> Vtune can visually display code paths and other goodies.
> http://www.intel.com/cd/software/products/asmo-na/eng/vtune/239144.htm
>
> I am going to be working on the core, sofia, curl, odbc (only as it
> relates to sofia).  I have a plan for how to do this in segments so that
> it should end up with a fairly good result if anything can be tuned.
>
> What I would really like though is people to try to deal with
> applications, mod_conference and mod_voicemail come to mind fairly
> quickly, both of which are 'native modules' meaning all the
> functionality is actually in the core.  So that would be core stuff too.
> Codecs are another big area that should be looked at since they are
> things very commonly used (who only does l16?)
>
> Any takers?
>
> If you dont know, a profiler generally only tells you 'this is called a
> bunch look there'.  So generally it wont tell you how to change stuff,
> although it claims "Easy access to compiler generated tuning advice"
> which implies that it will spell out code (but its language
> independent?!) that should optimize better.
>
> vtune claims that its compiler and language independent, so it *should*
> work with either suns compiler or gcc.
>
> You dont have to use vtune, that is just what I am going to use in
> linux.  I havent fully downloaded it yet so I really cant say if it even
> works (you may want to ./configure --enable-debug if -g isnt enabled by
> default).
>
> Vtune is 500M and their flash demo is a 20M downloadable .exe (why if
> its flash is it a .exe?  why not just a flv?  artards).
> -- 
> Trixter http://www.0xdecafbad.com     Bret McDanel
> Belfast +44 28 9099 6461        US +1 516 687 5200
> http://www.trxtel.com the phone company that pays you!
>
>
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