Struct MatxUtil

Public Static Functions

static std::shared_ptr<rmm::device_buffer> cast(const DevMemInfo &input, TypeId output_type)

Convert one device_buffer type to another.

Parameters

• input –

• output_type –

Returns

std::shared_ptr<rmm::device_buffer>

static std::shared_ptr<rmm::device_buffer> create_seg_ids(size_t row_count, size_t fea_len, TypeId output_type)

Builds a Nx3 segment ID matrix.

Parameters

• row_count –

• fea_len –

• output_type –

Returns

std::shared_ptr<rmm::device_buffer>

static std::shared_ptr<rmm::device_buffer> logits(const DevMemInfo &input)

Calculate logits on device_buffer.

Parameters

input –

Returns

std::shared_ptr<rmm::device_buffer>

static std::shared_ptr<rmm::device_buffer> transpose(const DevMemInfo &input)

Perform transpose.

Parameters

input –

Returns

std::shared_ptr<rmm::device_buffer>

static std::shared_ptr<rmm::device_buffer> threshold(const DevMemInfo &input, double thresh_val, bool by_row)

Returns an array of boolean where x[i,j] >= thresh_val, when by_row is true an Nx1 array will be returned with a true if any value in the row is above the threshold.

Parameters

• input –

• thresh_val –

• by_row –

Returns

std::shared_ptr<rmm::device_buffer>

static std::shared_ptr<rmm::device_buffer> reduce_max(const DevMemInfo &input, const std::vector<int32_t> &seq_ids, size_t seq_id_offset, const std::vector<int64_t> &output_shape)

Returns a buffer with output_shape containing the max value from values in input mapped according to seq_ids. Ex given a hypothetical input of:

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input =   [5, 2, 8, 9, 8, 2, 1]
seq_ids = [0, 0, 0, 1, 2, 3, 3]
        

Will return: [8, 9, 8, 2]

Parameters

• input –

• seq_ids –

• seq_id_offset –

• output_shape –

Returns

std::shared_ptr<rmm::device_buffer>