Date: Sat, 14 Jul 2012 15:25:01 +0400 From: Solar Designer <solar@...nwall.com> To: Tavis Ormandy <taviso@...xchg8b.com> Cc: john-dev@...ts.openwall.com Subject: Re: Rotate and bitselect investigation On Sat, Jul 14, 2012 at 03:13:49PM +0400, Solar Designer wrote: > I am not seeing better results on Intel CPUs than what I get on AMD with > XOP. For example, here's what I am getting on "Intel(R) Xeon(R) CPU > E31230 @ 3.20GHz" (Sandy Bridge, but without AVX), apparently at 3.3 GHz, > gcc 4.6.2: > > Benchmarking: Raw SHA-1 (pwlen <= 15) [128/128 SSE2 intrinsics 4x]... DONE > Raw: 17892K c/s real, 17892K c/s virtual Apparently, E31230 does have AVX, but the RHEL5'ish kernel on that machine does not make it available. Anyway, here's SSE4.1 build: Benchmarking: Raw SHA-1 (pwlen <= 15) [128/128 SSE4.1 intrinsics 4x]... DONE Raw: 17881K c/s real, 17881K c/s virtual No speedup from SSE2 somehow. Alexander
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