pytc.xtc._estimate_delta_u_direct_tile_bytes¶

pytc.xtc._estimate_delta_u_direct_tile_bytes(Np, Nq, Nr, Ns, N_rank, *, include_d=True)[source]¶

Estimate device memory for the balanced direct Delta U tile kernel.

Delegates to the canonical formula in pytc.utils.tile_memory.isdf_tile_peak_bytes() so that the runtime memory guard and the build-phase estimators in gpu_memory.py always agree.

include_d should be False when D is already a persistent on-device resident (cached by the per-device cache); otherwise D gets counted both in in_use (via the free-bytes probe) and again in the total peak — effectively doubling its contribution and triggering spurious “tile exceeds device memory” refusals.