Date: Tue, 27 Feb 2018 12:24:10 +0100 From: magnum <john.magnum@...hmail.com> To: john-users@...ts.openwall.com Subject: Re: Re: "No OpenCL devices was found" and "dri2 connection failed!" errors, when using NVidia gpus On 2018-02-27 00:06, Piotr Dobrogost wrote: > It looks like device 0 is CPU, device 1 is glitch in the Matrix :), devices > 2-9 are 8 Nvidia GPUs and device 10 is built-in/on-board GPU. > I guess running john with --devices=2,3,4,5,6,7,8,9 option should result in > work being distributed among all 8 GPUs. > How can I check if it's really the case? > I have all GPUs mining and when I run john with --devices=2,3,4,5,6,7,8,9 > option I see only the first GPU has lower hashrate which I take to mean john > is running only on it and not on any other GPU. Please read doc/README-OPENCL. You need to use the -fork option so you get one process per GPU. Something like this (but pause mining before this): ./john -fork=8 -dev=2,3,4,5,6,7,8,9 (...rest of command line) magnum
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