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Date: Thu, 28 Jun 2012 11:45:39 +0200
From: Tavis Ormandy <taviso@...xchg8b.com>
To: john-dev@...ts.openwall.com
Subject: Re: Re: Failed self test for raw-sha1-ng (linux-x86-sse2i OMP)
magnum <john.magnum@...hmail.com> wrote:
> On 2012-06-28 09:35, Tavis Ormandy wrote:
> > I see the bug, that's embarassing. Give me a minute to send a push
> > request.
> >
>
> It got a little slower benchmark now, hopefully just because of new test
> vectors.
>
> magnum
>
Let me see if I can win that back :-)
Re-ordering the W loads closer to first use seems to help gcc allocate the
registers a bit. I'm not 100% happy with the code it generates, but it looks
a little better. I think I can also nudge up the number of crypts with the
cmp_one changes.
On my linux-x86-native (xeon) machine, before:
$ ../run/john --test=30 --format=raw-sha1-ng
Benchmarking: Raw SHA-1 (pwlen <= 15) [128/128 SSE4.1 intrinsics 4x]... DONE
Raw: 12730K c/s real, 12803K c/s virtual
after:
$ ../run/john --test=30 --format=raw-sha1-ng
Benchmarking: Raw SHA-1 (pwlen <= 15) [128/128 SSE4.1 intrinsics 4x]... DONE
Raw: 13103K c/s real, 13160K c/s virtual
Please verify you get similar improvement, because I havn't tried it on x64.
Push request sent.
Tavis.
--
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