Date: Fri, 20 Feb 2015 11:05:02 +0100 From: magnum <john.magnum@...hmail.com> To: john-dev@...ts.openwall.com Subject: Re: descrypt speed On 2015-02-20 08:02, Royce Williams wrote: > I had previously stopped at 8 because 9 showed no appreciable > improvement at the time for unknown reasons. I naively presumed a > simple threshold and did not double-check. > > So fork=10 is the sweet spot on my system - two processes for the four > x16 cards, and one process for the x1 cards. More than that and > performance is never as good as at fork=10. Thanks for helping me to > clarify. > > Side question: Can I either tell JtR to automatically exit after X > minutes, or invoke --test against all GPUs? Either would make tests > like these simpler. You can run a test for five minutes using --test=300, or a real session for five minutes using --max-run=300 (that session is resumable, and will run for another 5 minutes each time you resume it). We do not support --fork with --test yet. We do for MPI though, which is otherwise much like fork if you run it on a single host. ./john --fork=4 (...) ~= mpirun -np 4 ./john (...) magnum
Powered by blists - more mailing lists
Confused about mailing lists and their use? Read about mailing lists on Wikipedia and check out these guidelines on proper formatting of your messages.