Date: Tue, 24 Jan 2012 21:34:41 +0100 From: Samuele Giovanni Tonon <samu@...uxasylum.net> To: john-dev@...ts.openwall.com Subject: Re: OpenCL vs Test Suite On 01/24/12 21:07, magnum wrote: > I had a look at OpenCL patch rev 5 today. Some comments: > > Here's raw-md5 in CPU: that's nice however, rawmd5, nt and rawmd4 are not actively mantained by me nor lukas : we just kept updating them but there has never been a look in to depth to optimize the code. If you could test with rawsha1, ssha, cryptmd5 and phpass that would be best; at the moment rawsha1 is not comparable with CPU version, but i'm working on it. > I enclose a patch that applies to Test Suite v1.11. With that applied, > you can test one [or more] formats "./jtrts.pl cryptmd5-opencl [...]", > or all OpenCL formats "./jtrts.pl opencl". Some of these problems may be > trivial, but hard to find without the test suite. i've never used the test suite but i might have a run to see if the same apply on my environment > During manual testing I also saw other errors than the one reported > during the test suite run: > OpenCL error (CL_OUT_OF_HOST_MEMORY) in file (common-opencl.c) at line > (72) - (Error creating context) > OpenCL error (CL_OUT_OF_RESOURCES) in file (cryptmd5_opencl_fmt.c) at > line (197) - (clFinish error) > > ...and sometimes even just the self-test for raw-md5 failed (when not > running X): > Benchmarking: Raw MD5 [raw-md5-opencl]... FAILED (get_hash(4)) > > Maybe some/all of these problems are "caused" by my environment? BTW, > when I tried running this with no X server active, I could see some > spectacular "progress report" on the console screen: I assume John was > using GPU memory that was part of my frame buffer. Is this normal? Is it > bad? with ati you need X and a user logged in to use OpenCL, on nvidia not, however, as far as i know, nvidia official driver doesn't have framebuffer . Never tried to use opencl on the "community" driver, i could give it a try, unfortunately only on ati. (my laptop has a dual video card intel/nvidia so i'm just running X/framebuffer on the intel and using nvidia for opencl only) > Am I supposed to be able to run a dual screen X at the same time as > running OpenCL formats? John will just get less GPU memory? Too little? john should not suffer any problem by having a dual screen or more.. well, if you have OpenGL and shiny effects enabled there could be some problem but i assure you they would be noticeable (aka, mouse not moving or moving in slow motion). Thanks for your tests! Cheers Samuele
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