Date: Sun, 14 Jul 2013 00:33:56 +0400 From: Solar Designer <solar@...nwall.com> To: john-dev@...ts.openwall.com Subject: Re: bug: GPU use in CPU-only formats magnum, Claudio - This problem is still present, and it manifests itself in an even worse way than I had thought. Not only is there some use of the first GPU during CPU-only runs with an OpenCL-enabled build, but also CPU time is being wasted by some OpenCL-related overhead, which slows down CPU-based cracking (in some of my tests, by more than a factor of 2 - that's when OpenMP is also in use). This is easily reproducible on our new dev box (which I'll create you accounts on shortly), where several ksoftirqd kernel threads appear high in "top" when running a CPU-only format in an OpenCL-enabled build of JtR. Alexander
Powered by blists - more mailing lists
Confused about mailing lists and their use? Read about mailing lists on Wikipedia and check out these guidelines on proper formatting of your messages.