Date: Wed, 9 Nov 2011 02:11:40 +0400 From: Solar Designer <solar@...nwall.com> To: john-dev@...ts.openwall.com Subject: Re: OpenMP for MD5-crypt On Thu, Oct 27, 2011 at 07:44:39PM +0200, magnum wrote: > It turned out md5cryptsse() was not thread-safe, but fixing that was > just a matter of moving a couple of global buffers into the function. > And adding OMP to MD5_fmt.c (for SSE only) was very easy once the coin > fell down. Patch uploaded to wiki as 0032. Efficiency is excellent. > Tested a lot, no problems. > > I also changed x86-64.h so we use 12x when building with icc, and 8x for > gcc. > > Benchmarking: FreeBSD MD5 [12x]... DONE > Raw: 28368 c/s real, 28368 c/s virtual > > Benchmarking: FreeBSD MD5 [12x]... (2xOMP) DONE > Raw: 53568 c/s real, 26918 c/s virtual Building with gcc but with icc-compiled intrinsics (make linux-x86-64i), here's what I get on 2xE5420: Benchmarking: FreeBSD MD5 [12x]... (8xOMP) DONE Raw: 215040 c/s real, 26812 c/s virtual Without OpenMP, the combined speed of 8 instances would be around 225k, so we get 95%+ efficiency. Well done. Thanks! Alexander
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