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Changelog for rocRAND

Documentation for rocRAND is available at https://rocm.docs.amd.com/projects/rocRAND/en/latest/

(Unreleased) rocRAND-3.1.0 for ROCm 6.2.0

Additions

  • Added rocrand_create_generator_host
    • The following generators are supported:
      • ROCRAND_RNG_PSEUDO_MRG31K3P
      • ROCRAND_RNG_PSEUDO_MRG32K3A
      • ROCRAND_RNG_PSEUDO_PHILOX4_32_10
      • ROCRAND_RNG_PSEUDO_THREEFRY2_32_20
      • ROCRAND_RNG_PSEUDO_THREEFRY2_64_20
      • ROCRAND_RNG_PSEUDO_THREEFRY4_32_20
      • ROCRAND_RNG_PSEUDO_THREEFRY4_64_20
      • ROCRAND_RNG_PSEUDO_XORWOW
      • ROCRAND_RNG_QUASI_SCRAMBLED_SOBOL32
      • ROCRAND_RNG_QUASI_SCRAMBLED_SOBOL64
      • ROCRAND_RNG_QUASI_SOBOL32
      • ROCRAND_RNG_QUASI_SOBOL64
    • The host-side generators support multi-core processing. On Linux, this requires the TBB (Thread Building Blocks) development package to be installed on the system when building rocRAND (libtbb-dev on Ubuntu and derivatives).
      • If TBB is not found when configuring rocRAND, the configuration is still successful, and the host generators are executed on a single CPU thread.
  • Added the option to create a host generator to the Python wrapper
  • Added the option to create a host generator to the Fortran wrapper
  • Added dynamic ordering. This ordering is free to rearrange the produced numbers, which can be specific to devices and distributions. It is implemented for:
    • XORWOW, MRG32K3A, MTGP32, Philox 4x32-10, MRG31K3P, LFSR113, and ThreeFry
  • For the NVIDIA platform compilation using clang as the host compiler is now supported.
  • C++ wrapper:
    • lfsr113_engine now also supports being constructed with a seed of type unsigned long long, not only uint4.
    • added optional order parameter to constructor of mt19937_engine

Changes

  • Building rocRAND now requires a C++17 capable compiler, as the internal library sources now require it. However consuming rocRAND is still possible from C++11 as public headers don't make use of the new features.
  • Building rocRAND should be faster on machines with multiple CPU cores as the library has been split to multiple compilation units.
  • C++ wrapper: the min() and max() member functions of the generators and distributions are now static constexpr.

Deprecations

  • Deprecated the following typedefs. Please use the unified state_type alias instead.
    • rocrand_device::threefry2x32_20_engine::threefry2x32_20_state
    • rocrand_device::threefry2x64_20_engine::threefry2x64_20_state
    • rocrand_device::threefry4x32_20_engine::threefry4x32_20_state
    • rocrand_device::threefry4x64_20_engine::threefry4x64_20_state

Removals

  • Removed references to and workarounds for deprecated hcc.
  • Support for HIP-CPU

(Unreleased) rocRAND-3.0.0 for ROCm 6.0.0

Additions

  • Added rocrand_create_generator_host with initial support for ROCRAND_RNG_PSEUDO_PHILOX4_32_10 and ROCRAND_RNG_PSEUDO_MRG31K3P.
  • Added the option to create a host generator to the Python wrapper
  • Added the option to create a host generator to the Fortran wrapper

Changes

  • Generator classes from rocrand.hpp are no longer copyable (in previous versions these copies would copy internal references to the generators and would lead to double free or memory leak errors)
    • These types should be moved instead of copied; move constructors and operators are now defined

Optimizations

  • Improved MT19937 initialization and generation performance

Removals

  • Removed the hipRAND submodule from rocRAND; hipRAND is now only available as a separate package
  • Removed references to, and workarounds for, the deprecated hcc

Fixes

  • mt19937_engine from rocrand.hpp is now move-constructible and move-assignable (the move constructor and move assignment operator was deleted for this class)
  • Various fixes for the C++ wrapper header rocrand.hpp
    • The name of mrg31k3p it is now correctly spelled (was incorrectly named mrg31k3a in previous versions)
    • Added the missing order setter method for threefry4x64
    • Fixed the default ordering parameter for lfsr113
  • Build error when using Clang++ directly resulting from unsupported amdgpu-target references
  • Added hip::device as dependency to benchmark_rocrand_tuning to make it compile with amdclang++.
  • Minor entropy waste in 64-bits Threefry function producing two log-normally-distributed doubles.

rocRAND-2.10.17 for ROCm 5.5.0

Additions

  • MT19937 pseudo random number generator based on M. Matsumoto and T. Nishimura, 1998, Mersenne Twister: A 623-dimensionally equidistributed uniform pseudorandom number generator
  • New benchmark APIs for Google Benchmark:
    • benchmark_rocrand_device_api replaces benchmark_rocrand_kernel
    • benchmark_curand_host_api replaces benchmark_curand_generate
    • benchmark_curand_device_api replaces benchmark_curand_kernel
  • Experimental HIP-CPU feature
  • ThreeFry pseudorandom number generator based on Salmon et al., 2011, Parallel random numbers: as easy as 1, 2, 3
  • Accessor methods for SOBOL 32 and 64 direction vectors and constants:
    • Enum rocrand_direction_vector_set to select the direction vector set
    • rocrand_get_direction_vectors32(...) supersedes:
      • rocrand_h_sobol32_direction_vectors
      • rocrand_h_scrambled_sobol32_direction_vectors
    • rocrand_get_direction_vectors64(...) supersedes:
      • rocrand_h_sobol64_direction_vectors
      • rocrand_h_scrambled_sobol64_direction_vectors
    • rocrand_get_scramble_constants32(...) supersedes h_scrambled_sobol32_constants
    • rocrand_get_scramble_constants64(...) supersedes h_scrambled_sobol64_constants

Changes

  • Python 2.7 is no longer officially supported

rocRAND-2.10.16 for ROCm 5.4.0

Additions

  • MRG31K3P pseudorandom number generator based on L'Ecuyer and Touzin, 2000, Fast combined multiple recursive generators with multipliers of the form a = ±2q ±2r
  • LFSR113 pseudorandom number generator based on L'Ecuyer, 1999, Tables of maximally equidistributed combined LFSR generators
  • SCRAMBLED_SOBOL32 and SCRAMBLED_SOBOL64 quasirandom number generators (scrambled Sobol sequences are generated by scrambling the output of a Sobol sequence)

Changes

  • The mrg_<distribution>_distribution structures, which provide numbers based on MRG32K3A, have been replaced by mrg_engine_<distribution>_distribution, where <distribution> is log_normal, normal, poisson, or uniform
    • These structures provide numbers for MRG31K3P (with template type rocrand_state_mrg31k3p) and MRG32K3A (with template type rocrand_state_mrg32k3a)

Fixes

  • Sobol64 now returns 64-bit (instead of 32-bit) random numbers, which results in the performance of this generator being regressed
  • Bug that prevented Windows code compilation in C++ mode (with a host compiler) when rocRAND headers were included

rocRAND-2.10.15 for ROCm 5.3.0

Additions

  • New benchmark for the host API using Google benchmark that replaces benchmark_rocrand_generate, which is deprecated

Changes

  • Increased the number of warmup iterations for rocrand_benchmark_generate from 5 to 15 to eliminate corner cases that generate artificially high benchmark scores

(Released) rocRAND-2.10.14 for ROCm 5.2.0

Additions

  • Backward compatibility for #include <rocrand.h> (deprecated) using wrapper header files
  • Packages for test and benchmark executables on all supported operating systems using CPack

rocRAND-2.10.13 for ROCm 5.1.0

Additions

  • Generating a random sequence of different sizes now produces the sequence without gaps, independent of how many values are generated per call
    • This is only in the case of XORWOW, MRG32K3A, PHILOX4X32_10, SOBOL32, and SOBOL64
    • This is only true if the size in each call is a divisor of the distributions output_width due to performance
    • The output pointer must be aligned with output_width * sizeof(output_type)

Changes

  • hipRAND has been split into a separate package
  • Header file installation location changed to match other libraries.
    • When using the rocrand.h header file, use #include <rocrand/rocrand.h> rather than #include <rocrand.h>
  • rocRAND still includes hipRAND using a submodule
    • The rocRAND package sets the provides field with hipRAND, so projects that require hipRAND can begin to specify it

Fixes

  • Offset behavior for XORWOW, MRG32K3A, and PHILOX4X32_10 generator
    • Setting offset now correctly generates the same sequence starting from the offset
    • Only uniform int and float will work, as these can be generated with a single call to the generator

Known issues

  • kernel_xorwow unit test is failing for certain GPU architectures

rocRAND-2.10.12 for ROCm 5.0.0

There are no updates for this ROCm release.

rocRAND-2.10.12 for ROCm 4.5.0

Additions

  • Initial HIP on Windows support

Changes

  • Packaging has been split into a runtime package (rocrand) and a development package (rocrand-devel): The development package depends on the runtime package. When installing the runtime package, the package manager will suggest the installation of the development package to aid users transitioning from the previous version's combined package. This suggestion by package manager is for all supported operating systems (except CentOS 7) to aid in the transition. The suggestion feature in the runtime package is introduced as a deprecated feature and will be removed in a future ROCm release.

Fixes

  • mrg_uniform_distribution_double is no longer generating an incorrect range of values
  • Order of state calls for log_normal, normal, and uniform

Known issues

  • kernel_xorwow test is failing for certain GPU architectures

[rocRAND-2.10.11 for ROCm 4.4.0]

Additions

  • Sobol64 support
  • Benchmark time measurement improvement
  • AddressSanitizer build option

Fixes

  • NVCC backend fix
  • Fix ranges of MRG32k3a device functions

[rocRAND-2.10.10 for ROCm 4.3.0]

Additions

  • gfx90a support
  • gfx1030 support
  • gfx803 supported re-enabled

Fixes

  • Memory leaks in Poisson tests
  • Memory leaks when generator is created, but setting seed/offset/dimensions throws an exception

[rocRAND-2.10.9 for ROCm 4.2.0]

Fixes

  • The rocRAND benchmark performance drop for xorwow has been fixed for older ROCm builds

[rocRAND-2.10.8 for ROCm 4.1.0]

Additions

  • Ability to force install dependencies with new -d flag in install script

Changes

  • rocRAND package name has been updated to support newer versions of ROCm

Fixes

  • rocRAND benchmark performance drop
  • Debug builds via the install script

[rocRAND-2.10.7 for ROCm 4.0.0]

There are no updates for this ROCm release.

[rocRAND-2.10.6 for ROCm 3.10]

There are no updates for this ROCm release.

[rocRAND-2.10.5 for ROCm 3.9.0]

There are no updates for this ROCm release.

[rocRAND-2.10.4 for ROCm 3.8.0]

There are no updates for this ROCm release.

[rocRAND-2.10.3 for ROCm 3.7.0]

Fixes

  • Package naming now reflects operating system name and architecture

[rocRAND-2.10.2 for ROCm 3.6.0]

There are no updates for this ROCm release.

[rocRAND-2.10.1 for ROCm 3.5.0]

Additions

  • Static library build options were added in the beta; these are subject to change (build method and naming) in future releases

Changes

  • HIP-Clang is now the default compiler

Deprecations

  • HCC build