Add NVIDIA GPU driver specification
This spec proposes to provide the initial design for Cyborg's NVIDIA pGPU driver. Change-Id: I9a6941eccebf65da4df90b95a1dc36f9bca40dc1
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This work is licensed under a Creative Commons Attribution 3.0 Unported
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License.
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http://creativecommons.org/licenses/by/3.0/legalcode
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==================================
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Cyborg NVIDIA GPU Driver Proposal
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==================================
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This spec proposes to provide the initial design for Cyborg's NVIDIA physical
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GPU management driver. Please note that the virtualized GPU is out of scope.
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we only support passthrough one pGPU card to one VM directly.
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Problem description
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===================
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This spec will add a NVIDIA GPU driver for Cyborg to manage specific
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NVIDIA physical GPU devices.
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Use Cases
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---------
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* As an operator, I would like to use Cyborg agent starts or does resource
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checking periodically, the Cyborg NVIDIA GPU driver should provider
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``discover()`` function to enumerate the list of the NVIDIA GPU devices,
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and report the details of all available NVIDIA GPU accelerators on the
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host, such as PID(Product id), VID(Vendor id), Device.
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* As a user, I would like to boot up a VM with NVIDIA GPU card attached in
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order to accelerate compute ability. Cyborg should be able to manage this
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kind of acceleration resources and assign it to the VM(binding).
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Proposed changes
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================
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In general, the goal is to develop a Cyborg NVIDIA GPU driver that supports
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discover interfaces for NVIDIA GPU accelerator framework. The driver should
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include the ``discover()`` function. For physical GPU, this function works by
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executing ``lspci`` command and reports devices' raw info sample as
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following::
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[
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{
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"vendor": "10de",
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"product": "1db6",
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"device": "0000:af:00:0"
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}
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]
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Generate Cyborg specific driver objects and resource provider modeling
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for the GPU device. Below is the objects to describe a pGPU devices which
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complies with the Cyborg database mode and Placement data model.
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::
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Hardware Driver objects Placement data model
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1 GPU 1 device |
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| 1 deployable ---> resource_provider
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| | ---> parent resource_provider: compute node
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1 pGPU 1 attach_handle ---> inventories(total:1)
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Alternatives
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------------
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None
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Data model impact
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-----------------
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NVIDIA GPU driver will not touch Data model.
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The Cyborg Agent can call NVIDIA GPU driver to update the database
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during the discover operations.
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REST API impact
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---------------
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None.
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Security impact
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---------------
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None
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Notifications impact
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--------------------
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None
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Other end user impact
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---------------------
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User can manage NVIDIA GPU cards by Cyborg NVIDIA GPU driver. Such as list
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of the NVIDIA GPU devices, report the details of all available NVIDIA GPU
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accelerators on the host, binding with NVIDIA GPU and so on.
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Performance Impact
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------------------
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None
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Other deployer impact
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---------------------
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Deployers need to make sure the GPU device hasn't been virtualized. Otherwise,
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we can't use it as a pGPU.
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Developer impact
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----------------
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None
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Implementation
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==============
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Assignee(s)
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-----------
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Primary assignee:
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Wenping Song
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Work Items
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----------
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* Implement NVIDIA GPU driver in Cyborg
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* Add related test cases.
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Dependencies
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============
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None
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Testing
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========
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* Unit tests will be added to test this driver.
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Documentation Impact
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====================
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Document NVIDIA pGPU driver in Cyborg project.
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Test report in Cyborg wiki
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References
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==========
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None
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History
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=======
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.. list-table:: Revisions
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:header-rows: 1
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* - Release
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- Description
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* - Train
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- Introduced
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