[Cado-nfs-discuss] Will hyperthreading result in faster or slower sieve times?

paul zimmermann Paul.Zimmermann at inria.fr
Fri Jan 19 11:44:47 CET 2018


       Robert,

> Currently, I am factoring RSA C180, utilizing a 10GB network using eight machines
> for a total of 72 threads.
> 
> Would eliminating the hyperthreading portion speed up the lattice sieving, in
> addition to possibly tamping down any possible network bottleneck, or not?
> 
> Best Regards,
> 
> RJD

my experience is that using hyperthreading helps to reduce the wall-clock time,
assuming the las jobs do not exceed the available memory of each node.

In the sieving phase there is no network bottleneck.

Best regards,
Paul Zimmermann


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