Date: Fri, 25 Feb 2011 11:26:46 +0300 From: Solar Designer <solar@...nwall.com> To: john-users@...ts.openwall.com Subject: Re: bitslice DES on AVX Hi, Here's another update. This time, I've added make targets for 32-bit Linux systems (linux-x86-avx and linux-x86-xop). Like before, they're tested under Intel's Software Development Emulator - the AVX one works (approx. 40% slower than it does with linux-x86-64-avx under 64-bit Linux on the same machine), the XOP one crashes on vpcmov with "Illegal instruction", as expected. Make targets for non-Linux systems may be added easily, but I did not bother doing it yet. The new patch (john-1.7.6-avx-3.diff) is attached to this message and uploaded to the wiki: http://openwall.info/wiki/john/patches More detailed announcement of the previous revision (most of what I wrote there still applies): http://www.openwall.com/lists/john-users/2011/02/23/10 If you try this out on a real CPU or on a XOP emulator, please post your results to john-users. Seriously, with 1000+ subscribers we ought to have someone with an AVX-capable CPU already. These are available for purchase since early January. Anyone? A week ago, Phoronix published benchmarks of JtR 18.104.22.168 on Core i7 2820QM mobile "Sandy Bridge" CPU clocked at 2.3 GHz (perhaps with Turbo Boost to a higher frequency). According to those, JtR does over 3.8M c/s on a single core with its pre-generated SSE2 assembly code (which is why there's almost no difference across C compilers): http://www.phoronix.com/scan.php?page=article&item=intel_snb_llvm&num=2 This is quite impressive. I wonder how a CPU like this will perform when we go from SSE2 instructions (2-op 128-bit) to AVX (3-op 256-bit or 128-bit). Thanks, Alexander View attachment "john-1.7.6-avx-3.diff" of type "text/plain" (8406 bytes)
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