cub::ScanLookaheadPolicy

struct ScanLookaheadPolicy

The tuning policy for the lookahead scan algorithm in DeviceScan.

Public Functions

inline constexpr int tile_size() const noexcept

inline friend ::std::ostream &operator<<(

::std::ostream &os,

const ScanLookaheadPolicy &p

)

Public Members

int reduce_and_scan_warps

Number of warps used for reduction and scanning.

int items_per_thread

Number of items processed per reduction and scanning thread.

int lookahead_items_per_thread

Number of lookahead items per thread in the lookback warp.

int lookahead_stages = 2

Number of pipeline stages for the lookahead squad.

int block_idx_stages = -1

Number of pipeline stages for stealing block indices.

Friends

inline friend constexpr bool operator==(

const ScanLookaheadPolicy &lhs,

const ScanLookaheadPolicy &rhs

) noexcept

inline friend constexpr bool operator!=(

const ScanLookaheadPolicy &lhs,

const ScanLookaheadPolicy &rhs

) noexcept