[Beowulf] AMD64 results...

Markus Baumgartner mb at gup.jku.at
Thu Dec 16 04:08:12 EST 2004

Bill Broadley wrote:
 > The strange thing is they are 32 bit binaries, despite being built
 > on a 64 bit os on a 64 bit hardware.
 > I played around with various mentioned optimizations (including -xW)
 > on the manpage, I never managed a 64 bit binary with icc-8.1 though.
 > The man page has numerous i32em and em64t references.

You probably need to download the EM64T edition of the Intel compiler 
8.1. It is called l_cce_pc_8.1.xxx. (Note the "e" in the filename). 
There are also versions l_cc_... that do not create code for EM64T.

$ file stream_d
stream_d: ELF 64-bit LSB executable, AMD x86-64, version 1 (SYSV), for 
GNU/Linux 2.4.0, dynamically linked (uses shared libs), not stripped

This is what I get on my dual Opteron 1.6 GHz workstation (using Gentoo 
Linux, icc -O3):

Function      Rate (MB/s)   RMS time     Min time     Max time
Copy:        1769.1100       0.2923       0.2894       0.3154
Scale:       1695.7910       0.3021       0.3019       0.3023
Add:         1646.2104       0.4668       0.4665       0.4670
Triad:       1793.2239       0.4286       0.4283       0.4294


Markus Baumgartner
Institute of Graphics and Parallel Processing, JKU Linz, Austria
Beowulf mailing list, Beowulf at beowulf.org
To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf

More information about the Beowulf mailing list