Date: Wed, 29 Aug 2012 20:00:56 +0200 From: magnum <john.magnum@...hmail.com> To: john-users@...ts.openwall.com Subject: Re: Questions about compiling for Optimal CPU Performance On 29 aug 2012, at 17:55, Brad Tilley <brad@...ystems.com> wrote: >>> My older Intel Celeron CPU lists sse, sse2 and sse3 as supported in >>> /proc/cpuinfo, should I make-x86-sse2 or make-x86-native when compiling >>> jumbo-6? Or does the difference really matter? >> >> You should probably use linux-x86-64i. If you run a 32-bit OS, you should >> really ask yourself why. > > You're joking, aren't you? Some CPUs are still 32-bit only or have 64-bit > capability, but disable it (such as some Intel Atoms). So when asked why, > that is the reason I sometimes use a 32-bit operating system and cannot > use a 64-bit OS for those specific CPUs. You can understand that I hope. > Not sure why this would be questioned... am I missing something? An inside > joke only related to JtR perhaps? Sorry, I thought all Celeron was 64-bit. Is that not the case? For a 32-bit build, linux-x86-sse2i is probably best, it uses intrinsics code precompiled with icc. magnum
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