Gimpsters,
If there are people with SPARC systems with large external caches
thinking about using Ernst Mayer's Mlucas for LL testing then
make the switch. I will be switching from MacLucasUNIX on an E450
with 400Mhz CPU with 4Mb caches to Mlucas as soon as the current
exponents finish. I ran a few tests to check on the speed differences
with the current exponents and to my surprize on this system Mlucas
is significantly faster. At 256K FFT I was seeing 0.11 secs/iter with
Mlucas against 0.15 secs/iter for MLU, at 512K FFT the figures were
0.25 secs/iter and 0.29 secs/iter respectively. Mlucas uses far less
memory that MLU and with a 4Mb cache you will really benefit from the
larger cache size. I would add that this is using the 32-bit code
as well. Mlucas runs significantly faster if you can compile and run it
on a 64-bit Solaris 7 system. MLU is unusual in that it runs significantly
slower in 64-bit mode. On small cache systems, MLU is faster for
current exponents.
I would like to upgrade the E450 to Solaris 7 and see what Mayer's
code can do in 64-bit mode, but the owners won't let me :-(
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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