Core 2 Duo and speed of computations
Ralf Stephan
ralf at ark.in-berlin.de
Thu Oct 12 19:03:51 CEST 2006
An obvious winner with multicore processors is factorization
using elliptic curves, also sieving is done in parallel mostly.
This will also work with pari if different instances of pari
have different random numbers. As you can see, it means you
must start one program for each processor core you have. Using
ecm is better here, however, as you can tune its parameters to
take advantage of multiple cores.
Another winner is tasks where each number has to be tested for
a property, and this test is independent of results of other numbers,
and it takes time. Here, you just start two instances of the same
program, working on different ranges.
Regards,
ralf
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