Date: Mon, 05 Feb 2024 12:17:57 +0100 From: Jan Beich <jbeich@FreeBSD.org> To: Alexander Leidinger <Alexander@Leidinger.net> Cc: sgk@troutmask.apl.washington.edu, "B. E." <estrabd@gmail.com>, freebsd-hackers@freebsd.org Subject: Re: GPU programming? Message-ID: <sf27-qhwa-wny@FreeBSD.org> In-Reply-To: <90ea0dd91b760b0b6f92065d09396545@Leidinger.net> (Alexander Leidinger's message of "Mon, 05 Feb 2024 08:55:58 %2B0100") References: <Zb_fTkeKTYSxpfKc@troutmask.apl.washington.edu> <CALSf6fRJA861r7XF=fOWOdfc7-AzGePa6r5P=bBA9-x-36LB4Q@mail.gmail.com> <Zb_4z5IKLl5yuXTJ@troutmask.apl.washington.edu> <90ea0dd91b760b0b6f92065d09396545@Leidinger.net>
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Alexander Leidinger <Alexander@Leidinger.net> writes: > ROCm: No idea. I have not seen any report about it working or even > being tried. But there was at least some discussion about it: > https://github.com/ROCm/ROCm/issues/138 > https://github.com/ROCm/ROCm/issues/1913 AFAIU (never owned an AMD GPU): - ROCm requires amdkfd.ko which drm-kmod doesn't provide since https://github.com/freebsd/drm-kmod/commit/a381f46adf8b - ROCm has poor *consumer* GPU support thus unattractive for volunteers/community to spend time porting > Intel: Maybe. We have spirv ports in the tree, and my limited > understanding is, that SPIR-V comes into play when someone wants to do > GPU compute there. CCing Jan as the port maintainer for the two spirv > ports. Maybe he can shed some light on this part. - Vulkan Compute works fine on every modern GPU (used at least by ncnn) - OpenCL works fine on Intel + AMD via Rusticl (Mesa), see https://cgit.freebsd.org/ports/commit/?id=d8990eff958b - OpenCL + oneAPI Level Zero via lang/intel-compute-runtime requires userptr, see https://github.com/FreeBSDDesktop/kms-drm/issues/197 As a volunteer I've burned out porting Intel stuff, so hopefully Rusticl kills Intel NEO (intel-compute-runtime) while Vulkan Video kills VA-API (libva-intel-media-driver) and QuickSyncVideo (intel-media-sdk + onevpl) Related https://www.phoronix.com/news/David-Airlie-oneAPI-Meetup
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