Date: Mon, 21 May 2012 16:06:58 +0200 From: Lukas Odzioba <lukas.odzioba@...il.com> To: john-dev@...ts.openwall.com Subject: Re: OpenCL vs. CUDA CPU usage 2012/5/16 Solar Designer <solar@...nwall.com>: > This is just an observation: somehow with CUDA we're fully wasting an > entire CPU core per GPU, whereas with OpenCL we're only using some CPU > time on one core: This might be related to our problem: Quote: "Solution was trivial — disable BLOCKING_SYNC if there more than one GPU at system. It means that each CUDA GPU will eat one CPU core but… who cares about CPU cores, right?" From: http://www.golubev.com/blog/?p=70 Lukas
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