mrg32k3a

oneMKL - Data Parallel C++ Developer Reference

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ID 772045

Date 10/31/2024

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mrg32k3a

Description
API

Description

The combined multiple recursive pseudorandom number generator MRG32k3a [L’Ecuyer99a].

API

Syntax

namespace oneapi::mkl::rng {
  class mrg32k3a {
  public:
    static constexpr std::uint32_t default_seed = 1;

    mrg32k3a(sycl::queue queue, std::uint32_t seed = default_seed);
    mrg32k3a(sycl::queue queue, std::uint32_t seed, mrg32k3a_mode::optimal mode);
    mrg32k3a(sycl::queue queue, std::uint32_t seed, mrg32k3a_mode::custom mode);
    mrg32k3a(sycl::queue queue, std::initializer_list<std::uint32_t> seed);
    mrg32k3a(sycl::queue queue, std::initializer_list<std::uint32_t> seed,
             mrg32k3a_mode::optimal mode);
    mrg32k3a(sycl::queue queue, std::initializer_list<std::uint32_t> seed,
             mrg32k3a_mode::custom mode);
    mrg32k3a(const mrg32k3a& other);
    mrg32k3a(mrg32k3a&& other);
    mrg32k3a& operator=(const mrg32k3a& other);
    mrg32k3a& operator=(mrg32k3a&& other);
    ~mrg32k3a();
  };
}

Devices supported: CPU and GPU.

Include Files

oneapi/mkl/rng.hpp

Input Parameters

Name	Type	Description
queue	`sycl::queue`	Valid `sycl::queue`, calls of the `oneapi::mkl::rng::generate()` routine submits kernels in this queue.
seed	`std::uint32_tstd::initializer_list<std::uint32_t>`	Initial conditions of the generator state or engine state.
mode	`mrg32k3a_mode::optimalmrg32k3a_mode::custom`	Initial conditions of the generator state or engine state.

NOTE:

Sub-sequence parallelization [L’Ecuyer02] is supported via the mode parameter. mrg32k3a_mode::optimal uses the optimal number of sub-streams, and mrg32k3a_mode::custom enables the passing a user-defined number of sub-streams (e.g. mrg32k3a_mode::custom my_mode{123}). There is also a helper structure template, mrg32k3a_mode::optimal_v, for optimal mode. Refer to the corresponding example for usage details.
Currently sub-sequence parallelization is supported only for uniform and gaussian distributions on GPU device.

See VS Notes for the detailed descriptions.

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oneMKL - Data Parallel C++ Developer Reference

mrg32k3a

Description

API