Date: Wed, 29 Aug 2012 08:27:21 -0400 (EDT) From: "Brad Tilley" <brad@...ystems.com> To: john-users@...ts.openwall.com Subject: Questions about compiling for Optimal CPU Performance Hello John Users, 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? Also, the Makefile has two possibilities for OpenMP... 1. -fopenmp 2. -fopenmp -msse2 Which one should be uncommented for optimal performance when the CPU lists multiple sse implementations. For example, should a CPU support sse4, would I be limiting performance if I opted for OpenMP with -msse2, or not? Just curious, perhaps this is documented someplace on the wiki and I missed it. Thanks, Brad
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