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Message-ID: <20150817180648.GA2329@openwall.com>
Date: Mon, 17 Aug 2015 21:06:48 +0300
From: Solar Designer <solar@...nwall.com>
To: john-dev@...ts.openwall.com
Subject: Sybase-PROP (Re: FMT_OMP_BAD)
On Sun, Aug 16, 2015 at 07:56:22PM +0200, magnum wrote:
> On 2015-08-16 19:30, Solar Designer wrote:
> >I just noticed that one format in the below 4.0 range isn't actually
> >that fast. So FAST_FORMATS_OMP wouldn't be appropriate for it.
> >Instead, we need to figure out and correct whatever other scalability
> >issue it has. It's this one:
> >
> >[solar@...er run]$ OMP_NUM_THREADS=1 ./john -test -form=Sybase-PROP
> >Warning: OpenMP is disabled; a non-OpenMP build may be faster
> >Benchmarking: Sybase-PROP [salted FEAL-8 32/64]... DONE
> >Many salts: 382976 c/s real, 382976 c/s virtual
> >Only one salt: 380928 c/s real, 380928 c/s virtual
>
> This is now https://github.com/magnumripper/JohnTheRipper/issues/1673
I found the main problem with this one: it turned out to be use of
static variables (thus, shared between the threads) in feal8_plug.c:
Rot2(). I'll post a patch for this and more shortly.
Alexander
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