PCI Root Count

Ontology Key Identifier

compute.native.cloud/pciRootCount

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Applicable Contexts

Kubernetes Annotation✓

Kubernetes Label✓

Kubernetes Taint—

ResourceClaim—

Description

Use this key to indicate the number of PCI root complexes present in a compute resource.

A PCI root complex is the hardware component that connects the CPU and memory subsystem to the PCIe fabric. Systems with multiple root complexes typically reflect a NUMA topology, where each CPU socket has its own PCIe hierarchy.

This key is useful for workloads that are sensitive to PCIe topology, such as those using GPU passthrough, SR-IOV networking, or high-performance storage devices, where the placement of a device relative to a CPU socket affects latency and bandwidth.

Validation Constraint

The value must be a natural number greater than zero (positive integer). Values such as 0, negative numbers, or non-numeric strings are not valid.

You can define validation rules that enforce these constraints.

Example Values

1

2

4