6.71. CUpti_ActivityNvLink4

struct CUpti_ActivityNvLink4

NVLink information.

This structure gives capabilities of each logical NVLink connection between two devices, gpu<->gpu or gpu<->CPU which can be used to understand the topology.

Public Members

CUpti_ActivityKind kind: The activity record kind, must be CUPTI_ACTIVITY_KIND_NVLINK.

uint32_t nvlinkVersion: NvLink version.

CUpti_DevType typeDev0: Type of device 0 CUpti_DevType.

CUpti_DevType typeDev1: Type of device 1 CUpti_DevType.

uint32_t index

Index of the NPU.

First index will always be zero.

uint32_t domainId

Domain ID of NPU.

On Linux, this can be queried using lspci.

union CUpti_ActivityNvLink4::[anonymous] idDev0

If typeDev0 is CUPTI_DEV_TYPE_GPU, UUID for device 0.

CUpti_ActivityDevice5. If typeDev0 is CUPTI_DEV_TYPE_NPU, struct npu for NPU.

union CUpti_ActivityNvLink4::[anonymous] idDev1

If typeDev1 is CUPTI_DEV_TYPE_GPU, UUID for device 1.

CUpti_ActivityDevice5. If typeDev1 is CUPTI_DEV_TYPE_NPU, struct npu for NPU.

uint32_t flag

Flag gives capabilities of the link.