`cuda.core` 1.3.0 Release Notes#

New features#

Added the read-only ManagedBuffer.last_prefetch_location property, which reports the destination requested by the most recent explicit prefetch across the buffer. It returns a Device or Host, including NUMA-specific host locations on CUDA 13, and None if any page has never been prefetched or the pages do not share one last-prefetch location. This reports the requested target, not current residency or completion of the asynchronous prefetch operation. (#2109)

Device methods that create resources or synchronize now act on that device’s bound context, even when another device is current. They do not change which device is current. For example, dev1.sync() synchronizes device 1’s bound context even when device 0 is current, and no longer touches other contexts on device 1 (such as a green context). Device.set_current() now always returns a Context with the correct device ID; passing a context created on a different device than the receiver now delegates to that device’s own set_current() instead of raising, so a context this method returns can always be pushed back through any Device object. (#2311)
Stream.wait() given a stream now works when that stream belongs to a device that is not current. The temporary ordering event is created in the waited-on stream’s context rather than the current one, which cuEventRecord rejects when the two differ. The stream ordering applied when importing foreign arrays and tensors uses the producer stream’s context the same way. (#2311)
LegacyPinnedMemoryResource.device_id now returns -1, as documented for memory that is not bound to a device and as PinnedMemoryResource already does, instead of raising RuntimeError. Buffer.device_id on such a buffer returns -1 as well, which also lets a pinned buffer back a linear or pitched texture resource.