Date: Fri, 20 Apr 2012 22:01:44 +0200 From: magnum <john.magnum@...hmail.com> To: john-dev@...ts.openwall.com Subject: Re: Pragma unroll On 04/20/2012 09:55 PM, Milen Rangelov wrote: > I would rather avoid pragma unroll too unless you stick to SDK 2.6. APP SDK > 2.5 has many problems with this. Though anyway, even if working correctly, > it tends to be counterproductive in many cases. You need to do very careful > profiling. Often less conditionals just can't compete with less occupancy > due to GPR usage. And loop unrolling can easily increase GPR utilization > beyond what you expected. OK that, but if we do see a performance boost from an unroll, then it's all fine and dandy, no? magnum
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