Source code for nemo_rl.models.megatron.batch_invariant

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# Mirrors megatron.core.inference.batch_dimensions_utils.TOKEN_ROUNDER; the driver
# venv has no Megatron-Core, so it cannot be imported here.
MCORE_TOKEN_ROUNDER = 64



[docs]
def batch_invariant_token_multiple(tp_size: int) -> int:
    """Smallest token multiple compatible with batch-invariant MCore inference."""
    if tp_size < 1:
        raise ValueError("tp_size must be positive.")
    return ((MCORE_TOKEN_ROUNDER + tp_size - 1) // tp_size) * tp_size