I am testing a molecular dynamics code for performance check on two machines
1. Intel Xeon CPU E5410 @ 2.33GHz
OS: Red Hat Enterprise Linux Server release 5.1 (Tikanga)
2.ntel Xeon CPU W3680 @ 3.33GHz
OS: Fedora release 13 (Goddard)
Same intel fortran 11.1, and I am using optimziation option as "-xHOST -O3 -ipo -no-prec-div ". Tested code is for
serial run and tested with a single core only.
Test results are:
1. 15 sec
2. 17 sec
Even though W3680 shows more than three times of performace than E5410 (http://www.cpubenchmark.net/cpu_lookup.php?cpu=Intel+Xeon+W3680+%40+3.33GHz), the execution speed is slower (!?).
I used same compiler/option and I have been trying to figure out how to accelerate but in vain.
To my best knowledge, Fedora 13 is not supported by ifort yet. If I reinstall any supported OS like ubuntu 9 then
will I get higher speed-up? Or any other comment will be very appreciated.
PS. PC of model 2 is dell T3550. I enabled hyperthread from the CMOS (it was disabled from the beginning).