Date: Sat, 16 Jul 2011 02:03:39 +0400 From: Solar Designer <solar@...nwall.com> To: john-dev@...ts.openwall.com Subject: Re: Any flags needed to statically link openmp in Linux Robert, On Thu, Jul 14, 2011 at 06:39:54PM -0400, Robert Harris wrote: > So, it looks like the opm des 7 patch needs to be fixed, maybe I'll do that > soon, if the creator does not. "The creator" is me, and frankly I did not care all that much about uses of that patch on 32-bit builds, where it results in relatively poor performance. Personally, I wouldn't use such builds anyway - I'd either use x86-64 builds, or on a 32-bit machine/OS I would run separate instances of JtR in the old-fashioned pre-OpenMP way. The performance hit of going from x86-sse.S (not thread-safe, so not used with OpenMP) to the intrinsics and thread-safety is just too large for 32-bit x86/SSE2 code. The compiler has too few registers to play with. That said, when time permits, I intend to merge the DES/OpenMP stuff into the official JtR, also getting rid of the -omp-des-4 vs. -omp-des-7 separation (avoiding the tradeoff in a certain way). When I do that, I intend to include support for 32-bit builds as well, for completeness. Alexander
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