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Release notes

We have attempted to document known bugs and limitations - in particular the HIP Kernel Language document uses the phrase "Under Development", and the HIP Runtime API bug list lists known bugs.

Upcoming:

  • Stability: Enforce perioidic host synchronization to reclaim resources if the application has launched a large number of commands (>1K) without synchronizing.
  • Register keyword now silently ignored on HCC (previously would emit warning).
  • Doc updates: Add some more frequently asked questions to FAQ, fix TOC in some files, review.
  • Cookbook.

===================================================================================================

Revision History:

=================================================================================================== Release:1.0 Date: 2016.11.8

  • Initial implementation for FindHIP.cmake
  • HIP library now installs as a static library by default
  • Added support for HIP context and HIP module APIs
  • Major changes to HIP signal & memory management implementation
  • Support for complex data type and math functions
  • clang-hipify is now known as hipify-clang
  • Added several new HIP samples
  • Preliminary support for new APIs: hipMemcpyToSymbol, hipDeviceGetLimit, hipRuntimeGetVersion
  • Added support for async memcpy driver API (for example hipMemcpyHtoDAsync)
  • Support for memory management device functions: malloc, free, memcpy & memset
  • Removed deprecated HIP runtime header locations. Please include "hip/hip_runtime.h" instead of "hip_runtime.h". You can use find . -type f -exec sed -i 's:#include "hip_runtime.h":#include "hip/hip_runtime.h":g' {} + to replace all such references

=================================================================================================== Release:0.92.00 Date: 2016.8.14

  • hipLaunchKernel supports one-dimensional grid and/or block dims, without explicit cast to dim3 type (actually in 0.90.00)
  • fp16 software support
  • Support for Hawaii dGPUs using environment variable ROCM_TARGET=hawaii
  • Support hipArray
  • Improved profiler support
  • Documentation updates
  • Improvements to clang-hipify

=================================================================================================== Release:0.90.00 Date: 2016.06.29

  • Support dynamic shared memory allocations
  • Min HCC compiler version is > 16186.
  • Expanded math functions (device and host). Document unsupported functions.
  • hipFree with null pointer initializes runtime and returns success.
  • Improve error code reporting on nvcc.
  • Add hipPeekAtError for nvcc.

=================================================================================================== Release:0.86.00 Date: 2016.06.06

  • Add clang-hipify : clang-based hipify tool. Improved parsing of source code, and automates creation of hipLaunchParm variable.
  • Implement memory register / unregister commands (hipHostRegister, hipHostUnregister)
  • Add cross-linking support between G++ and HCC, in particular for interfaces that use standard C++ libraries (ie std::vectors, std::strings). HIPCC now uses libstdc++ by default on the HCC compilation path.
  • More samples including gpu-burn, SHOC, nbody, rtm. See HIP-Examples

=================================================================================================== Release:0.84.01 Date: 2016.04.25

  • Refactor HIP make and install system:
    • Move to CMake. Refer to the installation section in README.md for details.
    • Split source into multiple modular .cpp and .h files.
    • Create static library and link.
    • Set HIP_PATH to install.
  • Make hipDevice and hipStream thread-safe.
    • Prefered hipStream usage is still to create new streams for each new thread, but it works even if you don;t.
  • Improve automated platform detection: If AMD GPU is installed and detected by driver, default HIP_PLATFORM to hcc.
  • HIP_TRACE_API now prints arguments to the HIP function (in addition to name of function).
  • Deprecate hipDeviceGetProp (Replace with hipGetDeviceProp)
  • Deprecate hipMallocHost (Replace with hipHostMalloc)
  • Deprecate hipFreeHost (Replace with hipHostFree)
  • The mixbench benchmark tool for measuring operational intensity now has a HIP target, in addition to CUDA and OpenCL. Let the comparisons begin. :)
    See here for more : https://github.com/ekondis/mixbench.

=================================================================================================== Release:0.82.00 Date: 2016.03.07

  • Bump minimum required HCC workweek to 16074.
  • Bump minimum required ROCK-Kernel-Driver and ROCR-Runtime to Developer Preview 2.
  • Enable multi-GPU support.
    • Use hipSetDevice to select a device for subsequent kernel calls and memory allocations.
    • CUDA_VISIBLE_DEVICES / HIP_VISIBLE_DEVICE environment variable selects devices visible to the runtime.
  • Support hipStreams – send sequences of copy and kernel commands to a device.
    • Asynchronous copies supported.
  • Optimize memory copy operations.
  • Support hipPointerGetAttribute – can determine if a pointer is host or device.
  • Enable atomics to local memory.
  • Support for LC Direct-To-ISA path.
  • Improved free memory reporting.
    • hipMemGetInfo (report full memory used in current process).
    • hipDeviceReset (deletes all memory allocated by current process).

=================================================================================================== Release:0.80.01 Date: 2016.02.18

  • Improve reporting and support for device-side math functions.
  • Update Runtime Documentation.
  • Improve implementations of cross-lane operations (_ballot, _any, _all).
  • Provide shuffle intrinsics (performance optimization in-progress).
  • Support hipDeviceAttribute for querying "one-shot" device attributes, as an alternative to hipGetDeviceProperties.

=================================================================================================== Release:0.80.00 Date: 2016.01.25

Initial release with GPUOpen Launch.