cuda.core 0.6.0 Release Notes

New features

• Added public access to default CUDA streams via module-level constants LEGACY_DEFAULT_STREAM and PER_THREAD_DEFAULT_STREAM

  Users can now access default streams directly from the cuda.core namespace:

  from cuda.core import LEGACY_DEFAULT_STREAM, PER_THREAD_DEFAULT_STREAM
  
  # Use legacy default stream (synchronizes with all blocking streams)
  LEGACY_DEFAULT_STREAM.sync()
  
  # Use per-thread default stream (non-blocking, thread-local)
  PER_THREAD_DEFAULT_STREAM.sync()
  

  The legacy default stream synchronizes with all blocking streams in the same CUDA context, ensuring strict ordering but potentially limiting concurrency. The per-thread default stream is local to the calling thread and does not synchronize with other streams, enabling concurrent execution in multi-threaded applications.

  This replaces the previous undocumented workaround of using Stream.from_handle(0) to access the legacy default stream.

Fixes and enhancements

None.