DaCe 0.14

What's Changed

This release brings forth a major change to how SDFGs are simplified in DaCe, using the Simplify pass pipeline. This both improves the performance of DaCe's transformations and introduces new types of simplification, such as dead dataflow elimination.

Please let us know if there are any regressions with this new release.

Features

• Breaking change: The experimental dace.constant type hint has now achieved stable status and was renamed to dace.compiletime
• Major change: Only modified configuration entries are now stored in ~/.dace.conf. The SDFG build folders still include the full configuration file. Old .dace.conf files are detected and migrated automatically.
• Detailed, multi-platform performance counters are now available via native LIKWID instrumentation (by @lukastruemper in #1063). To use, set .instrument to dace.InstrumentationType.LIKWID_Counters
• GPU Memory Pools are now supported through CUDA's mallocAsync API. To enable, set desc.pool = True on any GPU data descriptor.
• Map schedule and array storage types can now be annotated directly in Python code (by @orausch in #1088). For example:

import dace
from dace.dtypes import StorageType, ScheduleType

N = dace.symbol('N')

@dace
def add_on_gpu(a: dace.float64[N] @ StorageType.GPU_Global,
               b: dace.float64[N] @ StorageType.GPU_Global):
  # This map will become a GPU kernel
  for i in dace.map[0:N] @ ScheduleType.GPU_Device:
    b[i] = a[i] + 1.0

• Customizing GPU block dimension and OpenMP threading properties per map is now supported
• Optional arrays (i.e., arrays that can be None) can now be annotated in the code. The simplification pipeline also infers non-optional arrays from their use and can optimize code by eliminating branches. For example:

@dace
def optional(maybe: Optional[dace.float64[20]], always: dace.float64[20]):
  always += 1  # "always" is always used, so it will not be optional
  if maybe is None:  # This condition will stay in the code
    return 1
  if always is None:  # This condition will be eliminated in simplify
    return 2
  return 3

Minor changes

• Miscellaneous fixes to transformations and passes
• Fixes for string literal ("string") use in the Python frontend
• einsum is now a library node
• If CMake is already installed, it is now detected and will not be installed through pip
• Add kernel detection flag by @TizianoDeMatteis in #1061
• Better support for __array_interface__ objects by @gronerl in #1071
• Replacements look up base classes by @tbennun in #1080

Full Changelog: v0.13.3...v0.14