Hi all,
A while back someone asked about speeds on SPARC. I've got a couple of
new systems recently. These are the speeds I'm seeing (the * indicates
a new system):-
Ultra 5 270Mhz CPU 0.60 secs/iter on 8357543
Ultra 10 333Mhz/2Mb Cache CPU 0.44 secs/iter on 8134127
Ultra 5 360Mhz/256kb Cache CPU 0.49 secs/iter on 7902421 *
E450 300Mhz/2Mb Cache CPU 0.43 secs/iter on 8002399
E450 400Mhz/4mb Cache CPU 0.29 secs/iter on 8359489 *
This is using MacLucasUNIX compiled with the Sun workshop compilers.
A couple of surprizing results. (1) If I used the -xarch=v9
option on those systems that support this option, the resulting
binary runs slower on the tests than using -xarch=v8plusa.
(2) Differences in speeds on the tests supplied with the software
don't translate into differences in speed when working on Mersenne
numbers of the size above. Even with speed differences around 10%
on the tests showed no discernable differences in practice.
I haven't tried a binary compiled with the -xarch=v9 option on a
production run, perhaps it will be worth a try. If anyone does
this before I do, please post some results.
Bill Rea, Information Technology Services, University of Canterbury \_
E-Mail b dot rea at its dot canterbury dot ac dot nz </ New
Phone 64-3-364-2331, Fax 64-3-364-2332 /) Zealand
Unix Systems Administrator (/'
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