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Version: 1.0
For the complete Mojo documentation index, see llms.txt. Markdown versions of all pages are available by appending .md to any URL (e.g. /docs/manual/basics.md).

block_rank_in_cluster

block_rank_in_cluster() -> UInt32

Returns the unique identifier (rank) for the current thread block within its cluster.

Note:

  • Only supported on NVIDIA SM90+ GPUs.
  • Maps directly to the %cluster_ctarank special register in CUDA PTX.

Returns:

UInt32: A unique identifier in the range [0, cluster_size-1] where cluster_size is the total number of thread blocks in the cluster.