Difference between revisions of "Interesting ARM64 Platforms"
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(Created page with "This is a brain dump of "actively" interesting ARM64 platforms, mostly from Sonicadvance1. It's hard to remember which platforms are actively interesting for FEX development a...") |
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===== Problems ===== | ===== Problems ===== | ||
* Has bugged atomics on its Cortex-A78AE cores, so performance isn't good | * Has bugged atomics on its Cortex-A78AE cores, so performance isn't good | ||
| + | ** Errata 1951502 | ||
* Needs a kernel recompile on upstream Linux to enable the amdgpu kernel module | * Needs a kernel recompile on upstream Linux to enable the amdgpu kernel module | ||
* Setting up can be a bit of a pain, but boots upstream kernel | * Setting up can be a bit of a pain, but boots upstream kernel | ||
| + | |||
==== Jetson Thor - '''Upcoming''' ==== | ==== Jetson Thor - '''Upcoming''' ==== | ||
Not yet shipped. Will begin shipping in '''2025''' | Not yet shipped. Will begin shipping in '''2025''' | ||
| Line 31: | Line 33: | ||
** Wouldn't work without device tree changes anyway | ** Wouldn't work without device tree changes anyway | ||
** Maybe someone will eventually ship hardware with these PCIe lanes exposed | ** Maybe someone will eventually ship hardware with these PCIe lanes exposed | ||
| − | * Snapdragon Dev kit | + | * '''Snapdragon Dev kit was cancelled''' |
=== Server platforms === | === Server platforms === | ||
| Line 57: | Line 59: | ||
* Asahi Linux supported for M1/M2 Pro/Max/Ultra for native Linux | * Asahi Linux supported for M1/M2 Pro/Max/Ultra for native Linux | ||
** But breaks FEX because of 16KB pages | ** But breaks FEX because of 16KB pages | ||
| + | ** Big work in progress to get a VM running FEX with 4k pages and virtio-gpu | ||
| + | |||
===== Problems ===== | ===== Problems ===== | ||
* Thunderbolt can't accept GPUs | * Thunderbolt can't accept GPUs | ||
| Line 82: | Line 86: | ||
* Not really worth using | * Not really worth using | ||
* GPU doesn't have enough features for DXVK/VKD3D | * GPU doesn't have enough features for DXVK/VKD3D | ||
| + | * PCIe is bugged and requires nasty kernel work arounds to have a GPU plugged in | ||
| + | ** Not recommended | ||
=== RK3588 boards === | === RK3588 boards === | ||
Latest revision as of 01:21, 5 November 2024
This is a brain dump of "actively" interesting ARM64 platforms, mostly from Sonicadvance1. It's hard to remember which platforms are actively interesting for FEX development and usage. Definitely some bias in here.
Platforms that can accept a GPU
"Consumer" platforms
Jetson Orin
Behaviour
- PCIe can support a full Radeon GPU without issue
- Only 55W on the PCIe bus, so a bit underpowered.
- Needs external power for larger GPUs
Problems
- Has bugged atomics on its Cortex-A78AE cores, so performance isn't good
- Errata 1951502
- Needs a kernel recompile on upstream Linux to enable the amdgpu kernel module
- Setting up can be a bit of a pain, but boots upstream kernel
Jetson Thor - Upcoming
Not yet shipped. Will begin shipping in 2025
Behaviour
- Going to have Neoverse-V3AE cores, so will be significantly more powerful than Orin
Snapdragon X Elite
Behaviour
- Can have three Thunderbolt ports
- SoC also has 8x PCIe lane PHY
- Theoretically can accept GPU on at least the 8x PCIe PHY
- Reasonable CPU performance, if a little underwhelming
- Lots of laptop devices to choose from
Problems
- Linux doesn't yet support Thunderbolt on this platform
- GPU on Thunderbolt might not work
- No platform with 8x PCIe lanes exposed
- Snapdragon dev kit has a PCIe slot inside of it that isn't wired up
- Wouldn't work without device tree changes anyway
- Maybe someone will eventually ship hardware with these PCIe lanes exposed
- Snapdragon Dev kit was cancelled
Server platforms
All of these are very expensive and not really worth buying as a consumer
NVIDIA Grace
Grace-Hopper and Grace-Grace platform has a large number of Neoverse-V2 cores. Very expensive platform, and Grace-Grace not actually available.
Problems
- Really expensive. $40k to $100k+
- Grace-Grace 144 core not really available
AmpereOne
Only just now becoming available in October 2024.
Behaviour
- A96-37X SKU would likely be great in a desktop platform, but not available
- Custom CPU cores, not as high performance as Grace or very latest consumer platforms
Problems
- Untested but PCIe should be fixed
Platforms that can not accept a GPU
Consumer platforms
All Apple Silicon devices
Behaviour
- Highest performing ARMv8/ARMv9 CPUs today
- Parallels/UTM VM available in MacOS for all devices
- Asahi Linux supported for M1/M2 Pro/Max/Ultra for native Linux
- But breaks FEX because of 16KB pages
- Big work in progress to get a VM running FEX with 4k pages and virtio-gpu
Problems
- Thunderbolt can't accept GPUs
- This is due to Dart/IOMMU problems and memory mapping problems.
- Asahi linux has some documentation on this failure
- Mac Pro PCIe slots have the same issue, so nothing solved on that platform
Server platforms
Ampere Altra
Behaviour
- Has some desktop-like systems created by Avantek.
- Overpriced a bit, but volumes are low.
Problems
- Has bugged PCIe fabric that requires kernel workarounds to get GPUs working on it
- Doesn't fully solve the problem, latest Radeons still don't work
- Old CPU cores based on Neoverse-N1
- Not recommended unless you need a lot of cores
Misc Platforms
Raspberry Pi 4/5
- Low-cost
- Low-performance
- Not really worth using
- GPU doesn't have enough features for DXVK/VKD3D
- PCIe is bugged and requires nasty kernel work arounds to have a GPU plugged in
- Not recommended
RK3588 boards
- Old CPU cores, Cortex-A76
- Mali GPU which doesn't support enough features for DXVK/VKD3D
- Mesa drivers don't have enough features.