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[FEA] cuda.core: expose graph and graph-node identity/introspection APIs (CUDA 13.1) #2360
Description
Summary
CUDA 13.1 adds stable identifiers and navigation for graphs and nodes; CUDA 13.3 adds a related
function attribute. None are exposed by cuda.core.graph today.
Motivation: correlating cuda.core graph objects with profiler/tooling output (toolsNodeId),
diagnostics and logging, keying per-node bookkeeping for the update work in #2352 / #2354, and
navigating from a node back to its owning graph.
Underlying C APIs to cover
| C API | Purpose |
|---|---|
cuGraphGetId(CUgraph, unsigned int* graphId) |
stable ID of a graph definition |
cuGraphExecGetId(CUgraphExec, unsigned int* graphId) |
stable ID of an executable graph |
cuGraphNodeGetLocalId(CUgraphNode, unsigned int* nodeId) |
node ID local to its graph |
cuGraphNodeGetToolsId(CUgraphNode, unsigned long long* toolsNodeId) |
node ID as reported by profiling/tooling interfaces |
cuGraphNodeGetContainingGraph(CUgraphNode, CUgraph*) |
navigate from node to owning graph |
CU_FUNC_ATTRIBUTE_DEVICE_NODE_UPDATE_SUPPORTED (13.3) |
per-function attribute: kernel may perform device-side node updates |
Design sketch (draft — needs design-meeting review)
Important
Starting point only, not a settled design — review in the cuda.core design meeting.
Read-only properties, no new objects:
.idon the graph-definition and executable-graph wrappers (mapping to
cuGraphGetId/cuGraphExecGetIdrespectively);.local_id,.tools_id,.containing_graphon the node wrappers incuda.core.graph;- the 13.3 function attribute joins the existing kernel-attribute surface.
Open questions for the meeting:
- Exact mapping onto cuda.core's graph classes (which wrapper owns
CUgraphvsCUgraphExec). - Plain
intIDs vs. small typed wrappers. containing_graph: return an existing wrapper (identity-cached) or a fresh non-owning one —
consistent withfrom_handleconstructors need to allow managing ownership #1187 / Inconsistent lifetime management acrossfrom_handle/from_*APIs #1989 lifetime conventions.
References
- Driver docs (Graph Management): https://docs.nvidia.com/cuda/cuda-driver-api/group__CUDA__GRAPH.html
- Found during the CUDA 12.8 → 13.3 bindings vs. cuda.core gap sweep (2026-07-14)
-- Leo's bot
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