Date: Tue, 29 May 2012 01:40:42 +0200 From: Frank Dittrich <frank_dittrich@...mail.com> To: john-dev@...ts.openwall.com Subject: Re: GPU options On 05/29/2012 01:18 AM, magnum wrote: > On 05/29/2012 12:58 AM, Lukas Odzioba wrote: >> 2012/5/29 magnum <john.magnum@...hmail.com>: >>> On 05/29/2012 12:40 AM, Lukas Odzioba wrote: >>>> 2012/5/29 magnum <john.magnum@...hmail.com>: >>>>> Not sure what you mean with earlier, but --device=list or >>>>> --platform=list will call that. >>>> >>>> Thank you, I couldn't find it in ./john output: >>>> >>>> --platform=N (or =LIST) set OpenCL platform, default 0 >>>> --device=N set OpenCL device, default 0 >>>> >>>> I thought that LIST means sth like 1,2 isn't it misleading for user? >>>> Just asking. >>> >>> I just mimiced existing options, like --subformat=LIST. But hey, you >>> have a point: If/when we are going to support multiple devices it could >>> be given as eg. --device=0,1. >> >> This looks natural, I like it. > > Yes... but I now realize it wont suffice. In most cases you'd run a > couple of same-model GPU's and they would probably be platform 0, > devices 0 and 1. But on Bull, the Nvidia is platform 0, device 0 and the > 7970 is platform 1, device 0. That would mean --platform=0,1 and > --device=0 and it starts to get vague... and on some system we might > want to run (platform,device) 0,1 and 1,0. I'm not sure how to > accommodate that. Ideally we should come up with a better syntax for all > of this before the Jumbo release. What about dropping --platform, and using just --device? --device=0:0,1 (devices 0 and 1 of OpenCL platform 0) --device=1 (all devices of OpenCL platform 1? or all devices with ID 1 on all OpenCL platforms? Or CUDA device with ID 1?) --device=0:0/1:0 (device 0 of OpenCL platform 0 and device 0 of OpenCL platform 1) --device=0:0-2 (devices 0, 1, 2 of OpenCL platform 0) --device=LIST (List all platforms/devices) Then we would need to point to the documentation from the usage output. --device=[P:D|???|LIST] (set/list GPU platforms/devices, see doc/???) Frank
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