Date: Sun, 4 Mar 2012 05:15:39 +0400 From: Solar Designer <solar@...nwall.com> To: john-dev@...ts.openwall.com Subject: Re: CUDA & OpenCL status On Sun, Mar 04, 2012 at 01:53:31AM +0100, Lukas Odzioba wrote: > 2012/3/4 Solar Designer <solar@...nwall.com>: > > Why do you? Not enough PCIe x16 slots? > I've got 2*8 PCIe or 1*16. I had problems installing amd and nv > drivers (X's didn't want to start as far as I remember), In my case the NVidia card is currently primary (by slot number) - so BIOS and Ubuntu bootup messages go to it. Then which card is used by X is determined by current xorg.conf contents - I can make it either way without swapping the cards physically. I suppose I could also use both and connect multiple monitors if I wanted to, but I mostly just use this new machine over SSH from my main desktop machine now. FWIW, at the time of the tests that I posted, I had X running (but not in active use since I was logged in via SSH instead) on the AMD card only. The NVidia card was displaying some text in a framebuffer (no X running). With lsmod, I can see only the AMD driver in use: user@...l:~$ lsmod | egrep 'fglrx|nvidia' nvidia 12294232 0 fglrx 3129133 106 When I run X with xorg.conf set to use NVidia, it's 0 use count for fglrx and some non-zero number for nvidia. ...I've just started "LD_LIBRARY_PATH=/usr/local/cuda/lib64 ../run/john -te=10 -fo=phpass-cuda &" and quickly re-ran the lsmod command above: nvidia 12294232 12 fglrx 3129133 106 So the driver is indeed made use of by CUDA/OpenCL programs and this does not require having X use the driver as well. Alexander
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