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For the complete documentation index, see llms.txt. Markdown versions of all pages are available by appending .md to any URL (e.g. /get-started.md).

Mojo module

grid_controls

Grid Dependent Control primitives for NVIDIA Hopper (SM90+) GPUs.

This module provides low-level primitives for managing grid dependencies on NVIDIA Hopper architecture and newer GPUs. It enables efficient orchestration of multi-grid workloads by allowing grids to launch dependent grids and synchronize with them.

The module includes functions that map directly to CUDA grid dependency control instructions, providing fine-grained control over grid execution order:

  • launch_dependent_grids(): Triggers execution of grids that depend on the current grid
  • wait_on_dependent_grids(): Blocks until all dependent grids complete execution

These primitives are essential for implementing complex GPU execution pipelines where multiple kernels need to execute in a specific order with minimal overhead. They eliminate the need for host-side synchronization when orchestrating dependent GPU work.

Structs​

  • ​PDL: Programmatic Dependency Launch (PDL) control structure.
  • ​PDLLevel: Programmatic Dependency Launch (PDL) level.

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