Quote Originally Posted by Hans de Vries View Post
The Open64 compiler produces up to 25% faster code as Intel's latest version 12 compilers even
though the intentionally crippled results submitted by Intel run on a 40% higher clocked Bulldozer.....


Open64 4.2.5.2 Compiler suite: (SPEC results submitted by Dell)
2.6 GHz Bulldozer: SPEC_int_rate 134, SPEC_FP_rate 100

Intel Studio XE 12.0.3.176 compilers: (SPEC results submitted by Intel)
3.6 GHz Bulldozer: SPEC_int_rate 115, SPEC_FP_rate 79.8

http://www.spec.org/cpu2006/results/res2011q4/

Hans
I'm sorry, but I couldn't find your DELL result. It looks to me that you looked for highest scores and divided by 4 to get the same number of cores. Example :

For FP, you got the 100 from here : http://www.spec.org/cpu2006/results/...107-18771.html
For INT, you got the 134 from here : http://www.spec.org/cpu2006/results/...107-18768.html

Also you quoted peak values, instead of base values :

DELL Opteron 6276 2.6GHz SpecInt_rate/FP_rate : 117 / 93
Intel FX 3.6GHz SpecInt_rate/FP_rate : 106 / 79

Are the systems really comparable ? A desktop system with 8GB RAM running Windows 7 vs. a 128GB server running Linux Red Hat 6.1 ?
Apart from the HW differences, it is kind of expected that AMD's inhouse compiler (?) produces better results than ICC which probably if oblivious to BD's existence. Without knowing BD's caveats and new instructions set ( XOP, FMA ) the scores are not unexpected.