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Date: Sun, 5 Jul 2015 09:08:41 +0300
From: Solar Designer <solar@...nwall.com>
To: john-dev@...ts.openwall.com
Subject: Re: PHC: Lyra2 on GPU

On Sun, Jul 05, 2015 at 12:52:48AM +0200, Agnieszka Bielec wrote:
> [a@...er run]$ GOMP_CPU_AFFINITY=0-31 ./john --test --format=lyra2-lm
> Will run 32 OpenMP threads
> Benchmarking: Lyra2-lm, Generic Lyra2 [ ]... (32xOMP) DONE
> Speed for cost 1 (t) of 8, cost 2 (m) of 8
> Many salts:     38848 c/s real, 1263 c/s virtual
> Only one salt:  42272 c/s real, 1376 c/s virtual

BTW, "Many salts" being slower than "Only one salt" on this benchmark
suggests that something is highly non-optimal.  This shouldn't normally
be the case.  "Many salts" is supposed to be at least as fast as "Only
one salt", and possibly slightly faster (but probably not for any of the
PHC finalists, where these two should be roughly the same).

Alexander

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