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Talking specifically about ROCm here, their ML package. God this is such a tough paragraph to write accurately. AMD themselves have conflicting information al

by paulmd 4y ago

Talking specifically about ROCm here, their ML package. God this is such a tough paragraph to write accurately. AMD themselves have conflicting information all over their docs and repos and half of it is not even marked as "outdated"... https://docs.amd.com/bundle/ROCm-Getting-Started-Guide-v5.2.3 https://docs.amd.com/bundle/ROCm-Getting-Started-Guide-v5.2.... The official supported platforms at this point are RDNA2 (pro), GFX9 (pro), and CDNA. Consumer versions of these (RDNA2, Radeon VII, and Vega 56/64) probably work, although Vega 56/64 are an older version with much less hardware support as well. RDNA2 support is also "partial" and ymmv, things are often broken even on supported cards. If RDNA2 works, then RDNA1 may work, but again, mega ymmv, things may not even be great with RDNA2 yet. The "hardware guide" link talks about supporting Vega 10 (that's V56/64) and says GFX8 (Polaris) and GFX7 (Hawaii) are supported... but that doc is tagged 5.0 and 5.1 was the release that dropped the other stuff. So I'd say Vega 64/56 chips are probably broken at this point, on the current builds. Up until earlier this year though, it was unsupported on any consumer card except Radeon VII. They dropped Hawaii/Polaris/Vega support about 6 months before they started adding partial RDNA2 support back. And in contrast... NVIDIA's shit runs on everything, going back 10 years or more. At least to Kepler, if not Fermi or Tesla uarch (GTX 8800 series). It may not run great, but CUDA is CUDA, feature support has been a nearly forward ratchet, and they've had PTX to provide a rosetta stone in between the various architectural changes. I mean... at the end of the day the hardware hasn't changed that much, surely you can provide a shader fallback (which is required anyway since RDNA2 doesn't have tensor acceleration). I don't get what the deal is tbh. https://www.techpowerup.com/288864/amd-rocm-4-5-drops-polaris-architecture-support https://www.techpowerup.com/288864/amd-rocm-4-5-drops-polari... https://www.phoronix.com/news/Radeon-ROCm-5.1 https://www.phoronix.com/news/Radeon-ROCm-5.1

rektide 4y ago
Yeah there was unbelievably terrible lag getting Polaris/RDNA2 generation going. It was jaw droppingly slow to happen! But it did finally happen. I was afraid all RDNA[n] were going fully unsupported, which felt like a sure invitation of death. Sounds like there's still a lot of uncertainty, but it also doesnt sound as bad as I'd first feared; it seems like RDNA2+ could probably hopefully possibly work decent well. As opposed to, you have to buy unobtanium hard to find stupidly expensive cards. Seems like it's still playing out, & we dont know what RDNA2+ is good for yet, but it doesnt sound like the walk towards certain death this originally sounded like. Thanks for the intense hard to develop reply. A lot of in-flight status updates to gather. Appreciated. Really should be better established, what AMD is shooting for & what we can expect.

by paulmd 4y ago

rektide 4y ago

Yeah there was unbelievably terrible lag getting Polaris/RDNA2 generation going. It was jaw droppingly slow to happen! But it did finally happen. I was afraid all RDNA[n] were going fully unsupported, which felt like a sure invitation of death. Sounds like there's still a lot of uncertainty, but it also doesnt sound as bad as I'd first feared; it seems like RDNA2+ could probably hopefully possibly work decent well. As opposed to, you have to buy unobtanium hard to find stupidly expensive cards. Seems like it's still playing out, & we dont know what RDNA2+ is good for yet, but it doesnt sound like the walk towards certain death this originally sounded like. Thanks for the intense hard to develop reply. A lot of in-flight status updates to gather. Appreciated. Really should be better established, what AMD is shooting for & what we can expect.