7.28. cudaGraphEdgeData Struct Reference

[Data types used by CUDA Runtime]

Optional annotation for edges in a CUDA graph. Note, all edges implicitly have annotations and default to a zero-initialized value if not specified. A zero-initialized struct indicates a standard full serialization of two nodes with memory visibility.

Public Variables

unsigned char  from_port
unsigned char  reserved[5]
unsigned char  to_port
unsigned char  type

Variables

unsigned char cudaGraphEdgeData::from_port [inherited]

This indicates when the dependency is triggered from the upstream node on the edge. The meaning is specfic to the node type. A value of 0 in all cases means full completion of the upstream node, with memory visibility to the downstream node or portion thereof (indicated by to_port). Only kernel nodes define non-zero ports. A kernel node can use the following output port types: cudaGraphKernelNodePortDefault, cudaGraphKernelNodePortProgrammatic, or cudaGraphKernelNodePortLaunchCompletion.

unsigned char cudaGraphEdgeData::reserved[5] [inherited]

These bytes are unused and must be zeroed. This ensures compatibility if additional fields are added in the future.

unsigned char cudaGraphEdgeData::to_port [inherited]

This indicates what portion of the downstream node is dependent on the upstream node or portion thereof (indicated by from_port). The meaning is specific to the node type. A value of 0 in all cases means the entirety of the downstream node is dependent on the upstream work. Currently no node types define non-zero ports. Accordingly, this field must be set to zero.

unsigned char cudaGraphEdgeData::type [inherited]

This should be populated with a value from cudaGraphDependencyType. (It is typed as char due to compiler-specific layout of bitfields.) See cudaGraphDependencyType.