Date: Tue, 21 Feb 2012 23:33:32 +0100 From: magnum <john.magnum@...hmail.com> To: john-dev@...ts.openwall.com Subject: CUDA running on multiple cards I'm hammering you with GPU questions now :) What would it take to make use of multiple graphic cards in one JtR session? Would that need a complete re-write and a new design, or do you get some things "for free" or with help from the toolkit (like in OMP, where we just add a #pragma and voila, we have parallel processing)? And second, isn't there any kind of resource protection? I tried running cRARk and then started a John session. The cRARk session died (out of memory) and the John session crashed. Could a format detect that there are multiple cards, and pick one that is not already used? If nothing else, I'd like CUDA to support the --gpu=N option that OpenCL has in JtR, if possible. cRARk lacks that option btw, it always runs on first card. magnum
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