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gpu: add xe notes

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Co-authored-by: Eero Tamminen <eero.t.tamminen@intel.com>
Signed-off-by: Tuomas Katila <tuomas.katila@intel.com>
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Tuomas Katila 2024-02-16 22:06:55 +02:00
parent a3d3e9e687
commit 1de1024530
2 changed files with 39 additions and 1 deletions
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README.md
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@ -229,7 +229,7 @@ The summary of resources available via plugins in this repository is given in th
* [dsa-accel-config-demo-pod.yaml](demo/dsa-accel-config-demo-pod.yaml)
* `fpga.intel.com` : custom, see [mappings](cmd/fpga_admissionwebhook/README.md#mappings)
* [intelfpga-job.yaml](demo/intelfpga-job.yaml)
* `gpu.intel.com` : `i915`
* `gpu.intel.com` : `i915`, `i915_monitoring`, `xe` or `xe_monitoring`
* [intelgpu-job.yaml](demo/intelgpu-job.yaml)
* `iaa.intel.com` : `wq-user-[shared or dedicated]`
* [iaa-accel-config-demo-pod.yaml](demo/iaa-accel-config-demo-pod.yaml)

38
cmd/gpu_plugin/README.md
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@ -16,6 +16,7 @@ Table of Contents
* [Running GPU plugin as non-root](#running-gpu-plugin-as-non-root)
* [Labels created by GPU plugin](#labels-created-by-gpu-plugin)
* [SR-IOV use with the plugin](#sr-iov-use-with-the-plugin)
* [KMD and UMD](#kmd-and-umd)
* [Issues with media workloads on multi-GPU setups](#issues-with-media-workloads-on-multi-gpu-setups)
* [Workaround for QSV and VA-API](#workaround-for-qsv-and-va-api)
@ -36,6 +37,18 @@ For example containers with Intel media driver (and components using that), can
video transcoding operations, and containers with the Intel OpenCL / oneAPI Level Zero
backend libraries can offload compute operations to GPU.
Intel GPU plugin may register four node resources to the Kubernetes cluster:
| Resource | Description |
|:---- |:-------- |
| gpu.intel.com/i915 | GPU instance running legacy `i915` KMD |
| gpu.intel.com/i915_monitoring | Monitoring resource for the legacy `i915` KMD devices |
| gpu.intel.com/xe | GPU instance running new `xe` KMD |
| gpu.intel.com/xe_monitoring | Monitoring resource for the new `xe` KMD devices |
While GPU plugin basic operations support nodes having both (`i915` and `xe`) KMDs on the same node, its resource management (=GAS) does not, for that node needs to have only one of the KMDs present.
For workloads on different KMDs, see [KMD and UMD](#kmd-and-umd).
## Modes and Configuration Options
| Flag | Argument | Default | Meaning |
@ -205,6 +218,31 @@ GPU plugin does __not__ setup SR-IOV. It has to be configured by the cluster adm
GPU plugin does however support provisioning Virtual Functions (VFs) to containers for a SR-IOV enabled GPU. When the plugin detects a GPU with SR-IOV VFs configured, it will only provision the VFs and leaves the PF device on the host.
### KMD and UMD
There are 3 different Kernel Mode Drivers (KMD) available: `i915 upstream`, `i915 backport` and `xe`:
* `i915 upstream` is a vanilla driver that comes from the upstream kernel and is included in the common Linux distributions, like Ubuntu.
* `i915 backport` is an [out-of-tree driver](https://github.com/intel-gpu/intel-gpu-i915-backports/) for older enterprise / LTS kernel versions, having better support for new HW before upstream kernel does. API it provides to user-space can differ from the eventual upstream version.
* `xe` is a new KMD that is intended to support future GPUs. While it has [experimental support for latest current GPUs](https://docs.kernel.org/gpu/rfc/xe.html) (starting from Tigerlake), it will not support them officially.
For optimal performance, the KMD should be paired with the same UMD variant. When creating a workload container, depending on the target hardware, the UMD packages should be selected approriately.
| KMD | UMD packages | Support notes |
|:---- |:-------- |:------- |
| `i915 upstream` | Distro Repository | For Integrated GPUs. Newer Linux kernels will introduce support for Arc, Flex or Max series. |
| `i915 backport` | [Intel Repository](https://dgpu-docs.intel.com/driver/installation.html#install-steps) | Best for Arc, Flex and Max series. Untested for Integrated GPUs. |
| `xe` | Source code only | Experimental support for Arc, Flex and Max series. |
> *NOTE*: Xe UMD is in active development and should be considered as experimental.
Creating a workload that would support all the different KMDs is not currently possible. Below is a table that clarifies how each domain supports different KMDs.
| Domain | i915 upstream | i915 backport | xe | Notes |
|:---- |:-------- |:------- |:------- |:------- |
| Compute | Default | [NEO_ENABLE_i915_PRELIM_DETECTION](https://github.com/intel/compute-runtime/blob/3341de7a0d5fddd2ea5f505b5d2ef5c13faa0681/CMakeLists.txt#L496-L502) | [NEO_ENABLE_XE_DRM_DETECTION](https://github.com/intel/compute-runtime/blob/3341de7a0d5fddd2ea5f505b5d2ef5c13faa0681/CMakeLists.txt#L504-L510) | All three KMDs can be supported at the same time. |
| Media | Default | [ENABLE_PRODUCTION_KMD](https://github.com/intel/media-driver/blob/a66b076e83876fbfa9c9ab633ad9c5517f8d74fd/CMakeLists.txt#L58) | [ENABLE_XE_KMD](https://github.com/intel/media-driver/blob/a66b076e83876fbfa9c9ab633ad9c5517f8d74fd/media_driver/cmake/linux/media_feature_flags_linux.cmake#L187-L190) | Xe with upstream or backport i915, not all three. |
| Graphics | Default | Unknown | [intel-xe-kmd](https://gitlab.freedesktop.org/mesa/mesa/-/blob/e9169881dbd1f72eab65a68c2b8e7643f74489b7/meson_options.txt#L708) | i915 and xe KMDs can be supported at the same time. |
### Issues with media workloads on multi-GPU setups
OneVPL media API, 3D and compute APIs provide device discovery