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We have a project that I have timed on various CPUs, and compilers. It
makes heavy use of FFTW (single precision).<br>
<br>
Running native i386 code does very well for us on the Opteron, unlike
the Itanium 2.<br>
<br>
<br>
<b>Itanium 2 1.0 GHz on Red Hat Linux Advanced Workstation release
2.1AW</b><br>
234 seconds (IA64 code and ECC, -fno-alias -IPF_fma -Ob2 -ipo -restrict)<br>
1515 seconds (i386 code and GCC)<br>
<br>
<b>AMD Opteron 1.4 GHz on United Linux 1.0</b><br>
189 seconds (gcc, x86_64 code)<br>
221 seconds (gcc, i386 code)<br>
<br>
<b>Athlon 1.5 GHz (AMD Athlon(tm) MP Processor 1800+) on Redhat 8.0</b><br>
190 seconds (gcc, i386 code)<br>
<br>
<b>Intel Xeon 1.7 GHz on Redhat 8.0</b><br>
267 seconds (gcc, i386 code)<br>
<br>
<b>Sun Intel Xeon 2.8 GHz on Redhat 7.3</b><br>
150 seconds (gcc, i386 code)<br>
<br>
<b>Alpha 667 GHz</b><br>
430 seconds (Compaq compiler for both, optimized code)<br>
<br>
<b>Intel 2.2Ghz Xeon on RH 7.3</b><br>
208 seconds (gcc, i386 code)<br>
<br>
<pre class="moz-signature" cols="72">--
Cheers,
Karl Bellve
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