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AOMP Release 16.0-2
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@estewart08 estewart08 released this 11 Nov 20:50
rel_16.0-2
304c11e

These are the release notes for AOMP 16.0-2. This release uses modifications to the LLVM development trunk called the "amd-stg-open" branch. This is found at https://github.com/RadeonOpenCompute/llvm-project. The amd-stg-open branch is constantly changing as AMD merges upstream development trunk with its internal open development efforts. Some AMD modifications are experimental and/or under review for the LLVM upstream mono-repo. The AOMP release is a snapshot of amd-stg-open and supporting repositories to build various components.

For AOMP 16.0-2, the last trunk commit is 0ccff030f3b4145bd658e362a63db9aae2942bee on Oct 15 2022. This is the 3rd AOMP release for LLVM 16 development. The last amd-only commit is 863a830a66c8bdb5371e56030961449df24d5c48 on Nov 2, 2022. This forms a frozen branch now called "aomp-16.0-2". See https://github.com/RadeonOpenCompute/llvm-project/tree/aomp-16.0-2. Currently, the amd-only content differs from the trunk by 62480 lines in 459 files.

AOMP is a "standalone" build of all necessary ROCm components with the exception of the kernel module and libdrm. The non llvm-project components for this release were built with ROCM 5.3.x sources.

These are the changes from 16.0-1 to 16.0-2 include:

  • Dropped support for Ubuntu 18.0-4.
  • Fix for early USM failure - openfoam does not hang
  • Enhance xteam reductions (with codegen). Support for integer data types.
  • Fix for double _Complex scalars in target region, test/smoke-fails/double_complex_scalar now works. This test will move to smoke in next release.
  • Support for target teams loop directive
  • Force synchronous execution of regions controlled via OMPX_FORCE_SYNC_REGIONS
  • New environment variable GPU_MAX_HW_QUEUES controls number of HSA queues created, default is 4. This change actually occurred in 16.0-1 but was not listed in release notes.

Errata:
(potential regressions from 16.0-1):

  • Smoke test failures:
    clang-ifaces: core dump (gfx908)
    clang-337336: core dump gfx908)
    clang-325070: core dump (gfx908)

(potential regressions from 16.0-0):

  • Performance decrease with lulesh
  • Performance decrease with Nekbone
  • Smoke test failures:
    flang-315870: (resolved by building this test case with cov5)
    managed_memory: segfault, when 2+ devices are present
  • Hip example failure:
    device-lib
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