Date: Mon, 8 Mar 2021 19:32:50 +0100 From: Lukas Odzioba <lukas.odzioba@...il.com> To: john-users@...ts.openwall.com Subject: Re: Multi-gpu setup On 8 mar 2021, 16:23 Michał Majchrowicz <sectroyer@...il.com> wrote: > Quick question. Does john splits gpu tasks equally? It used, to I am not sure whether it is still the case. Please correct me if I am wrong. > I just run a md5crypt dict attack on a multi gpu system and noticed one of gpus > finished way faster than other one. Are those GPUs identical (same model)? > If so can specify how big percentage will go to one gpu and how big to other ? There is no easy way for that as far as I remember, but what you can do is to split input dictionary manually in percentage which you would like to use and then use --devices= parameter to specify an attack for a given subset of initial dictionary. You can list devices seen by John by using "--list=opencl-devices" parameter, so you would know which GPU corresponds to which id. Thanks, Lukas
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