flashinfer.comm.probe_pcie_ipc_rank_topology

flashinfer.comm.probe_pcie_ipc_rank_topology(rank: int, device: device | None = None) → PcieIpcRankTopology

Probe this rank’s GPU against other visible GPUs, recording failures.

The collective resolver exchanges group UUIDs first so it can also query peers hidden by this process’s CUDA_VISIBLE_DEVICES.