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psa_pack_qkv

vision_rs::models::yolo::kernels::attention::psa

Function psa_pack_qkv 

Source 
pub fn psa_pack_qkv<T: Triton, D: Float, const KEY_DIM: i32>(
    qkv_ptr: T::Pointer<D>,
    out_ptr: T::Pointer<D>,
    qkv_h: i32,
    H: i32,
    W: i32,
    B: i32,
    num_heads: i32,
)
where
    T::I32Tensor: Tensor<i32, 1> + Comparison<i32, BoolTensor = T::BoolTensor>,
    T::Pointer<D>: AddOffsets<i32, 1, T::I32Tensor, Output = T::Tensor<T::Pointer<D>>>,
Expand description

Rearranges the NCHW QKV tensor into packed FA2 format.

Input: qkv_ptr — [B, qkv_h, H, W] NCHW, qkv_h = num_heads * 4 * KEY_DIM Output: out_ptr — flat [4, BH, N, KEY_DIM] buffer

  • Section 0: Q, Section 1: K, Section 2: V_lo, Section 3: V_hi

Grid: [4 * BH * N, 1, 1] — one CTA per (section, bh, n) triple. Block: [KEY_DIM, 1, 1]