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Date: Fri, 22 Jun 2012 01:37:29 +0200
From: magnum <john.magnum@...hmail.com>
To: john-dev@...ts.openwall.com
Subject: Re: relbench and changed format names
On 2012-06-22 01:21, Frank Dittrich wrote:
> On 06/22/2012 12:49 AM, magnum wrote:
>> On 2012-06-22 00:37, Frank Dittrich wrote:
>>> Benchmarking: NT MD4 [128/128 SSE2 + 32/32]... DONE
>>> Raw: 2202K c/s real, 2224K c/s virtual
>>>
>>> Benchmarking: NT MD4 [128/128 SSE2 intrinsics 12x]... DONE
>>> Raw: 5078K c/s real, 5235K c/s virtual
>>
>> How can my vanilla MD4 NT2 format be *that* much faster than Alain's
>> optimised one that reverses rounds? Something must be amiss.
>
> Don't really know how that happened.
> I can't reproduce it now.
> With
>
> $ ./john --list=build-info
> Version: 1.7.9-jumbo-5+unstable
> Build: linux-x86-sse2 OMP
> Arch: 32-bit LE
> $JOHN is ./
> Rec file version: REC3
> CHARSET_MIN: 32 (0x20)
> CHARSET_MAX: 126 (0x7e)
> CHARSET_LENGTH: 8
> gcc version: 4.6.3
>
> I get much smaller differences now (repeated several times, with similar
> results):
>
> $ ./john --test --format=nt
> Benchmarking: NT MD4 [128/128 SSE2 + 32/32]... DONE
> Raw: 5330K c/s real, 5277K c/s virtual
> $ ./john --test --format=nt2
> Benchmarking: NT MD4 [128/128 SSE2 intrinsics 12x]... DONE
> Raw: 6746K c/s real, 6814K c/s virtual
Still, Alain's format should not be that much slower. Simon's register
tricks must be damn good. In my head, nt2 should always be slower, but I
know it's typically faster.
> And with
> $ ./john --list=build-info
> Version: 1.7.9-jumbo-5+unstable
> Build: linux-x86-sse2i
> Arch: 32-bit LE
> $JOHN is ./
> Rec file version: REC3
> CHARSET_MIN: 32 (0x20)
> CHARSET_MAX: 126 (0x7e)
> CHARSET_LENGTH: 8
> gcc version: 4.6.3
>
> I get:
>
> $ ./john --test --format=nt
> Benchmarking: NT MD4 [128/128 SSE2 + 32/32]... DONE
> Raw: 6877K c/s real, 6946K c/s virtual
>
> $ ./john --test --format=nt2
> Benchmarking: NT MD4 [128/128 SSE2 intrinsics 12x]... DONE
> Raw: 6318K c/s real, 6318K c/s virtual
The difference between -sse2 and -sse2i builds should be *zilch* for
Alain's format, OMP or not. Apparently it's not, this figure is a good
30% faster than the one above.
Also, it seems icc precompiled intrinsics just make things slower here
for nt2. Please run "make clean testpara32" and post the output.
magnum
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