Re: Intel compilers performance over itanium 2 (madison)

"xpuente" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED]
> Hi all,
> 
> First all, maybe this is not the correct group to post this but I think
> here's people who can help with my probs.
> Well, I have a SGI Altix system with 8 madison 1.3 GHz procs. FP
> applications runs fine with 7.1 intel compilers but integer applications
> runs badly. We have a big C++ application and with this system the
> performance is even lower than a Origin 3200 based on R12000 400MHz
> processors. Some one can think that intel compiler sucks and exploring the
> assembed code really sucks. Not only because the poor IPC achieved (bellow
> 0.7) but loking in code you can see that sequences like:
> 
>         int Class::method(Boolean a)
>        { return (a ? 1:0);}
> 
> The intel VTune says thats this code has a very low IPC but not only this.
> The asembled code is huge for this method. In fact if you use if(){}else{}
> sentence legth is roughly one half. Obviously my code has a lot of these
> sentences.... and much of the slowdown is caused by this.  I cant understand
> how is the compiler so bad. Some one has similar experience with these
> compilers or i'm stupid (or my code is a crap)?.
> 
> Thanks in advance... and please... if some one at SGI read this... make a
> decent compiler (such as MIPSPro) (BTW a decent profiler... I miss
> SpeedShop)
> --
> vpuente
> 

If you want help from the Intel guys best place is the compiler user forums
the support guys post there as well
http://softwareforums.intel.com/ids

Or for specifc issuses
http://premier.intel.com/