Date: Sun, 27 Aug 2017 06:11:07 -0500 From: Scott Bennett <bennett@sdf.org> To: jbeich@vfemail.net Cc: freebsd-x11@freebsd.org Subject: Re: x11/nvidia-driver-340 and OpenCL Message-ID: <201708271111.v7RBB7Z8005388@sdf.org> In-Reply-To: <y3q5-l7c4-wny@FreeBSD.org> References: <201708241205.v7OC5wrR016229@sdf.org> <y3q5-l7c4-wny@FreeBSD.org>
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Jan Beich <jbeich@vfemail.net> wrote:
Thanks for taking the time to respond.
> Scott Bennett <bennett@sdf.org> writes:
>
> > My current system has a pair of 10-year-old Radeon HD 3870x2 cards
> > interconnected by a Crossfire cable. Those cards support OpenGL 4, but
> > do not support OpenCL, unfortunately. My previous computer, now sitting
> > unused in a corner, has an EVGA GeForce 210 card in it that supports only
> > OpenGL 3.1, according to the box it came in, but does support OpenCL,
> > though it doesn't say up to which version of OpenCL. The modern
> > x11/nvidia-driver does not support this older card, but
> > x11/nvidia-driver-340 does support it. I could pull one of the Radeon
> > cards, disconnecting the unsupported-by-X.org Crossfire cable, and
> > replace the card with the EVGA card if the older driver it requires
> > supports OpenCL on it. Can anyone tell me whether it does? If so, I
> > would like to leave the monitor connected to the remaining Radeon card
> > and use the Nvidia-based EVGA card just for OpenCL. I would rather not
> > spend money on a newer and more powerful card from either company just
> > to familiarize myself with OpenCL, and the EVGA ought to be good enough
> > for that purpose if the driver will support it.
> > Thanks in advance for any information on this!
>
> NVIDIA seems to implement OpenCL via CUDA runtime but both are
> missing[1] in the FreeBSD driver. CUDA is known to work via 32bit
> linuxulator but not 64bit one (bug 206711). OpenCL may work as well
> after extracting under /compat/linux at least nvidia.icd,
> libnvidia-opencl.so.1 and dependencies from Linux version of the driver.
>
> --
> [1] NVIDIA driver for FreeBSD is probably in maintenance-only mode given new
> features like DRM KMS or Vulkan are also missing for more than a year.
> Try comparing NVIDIA_Changelog or files installed by Linux and FreeBSD
> version of the driver to get an insight.
Thank you very much for that information, Jan. I will take a look at
that, but if the situation is that chancy and would mean being stuck with
32-bit emulation, it probably wouldn't be my best option after all.
Do you know whether a 64-bit driver (for later Nvidia cards, of course)
is in the works with up-to-date features? Or would I do better by buying a
more recent Radeon card?
Scott Bennett, Comm. ASMELG, CFIAG
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