[quote="tqchen, post:3, topic:7744, full:true"]
I agree P2 is better. However, we need to be mindful that the composite can go
beyond single accelerator settings. For example, we might also want to compose
`arm_cl` and opencl on ARM GPU
[/quote]
Since `accelerators` is an array, we can specify `[{kind: arm_acl}, {'kind":
opencl'}]` to represent this semantic. However, we need to integrate the
CPU/GPU heterogeneous execution to BYOC to make it work. Currently, we can only
support multiple BYOC backends (e.g., `[{kind: arm_acl}, {'kind": ethosn'}]`),
since they share the same graph partitioning mechanism.
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