Summary: This operation is done every time we load a binary, this behavior should be moved into OpenMP since it concerns an OpenMP specific data struct. This is a little messy, because ideally we should only be using public APIs, but more can be extracted later.
Implement olMemFill to support filling device memory with arbitrary length patterns. AMDGPU support will be added in a follow-up PR.
A simple info query for events that returns whether the event is complete or not.
This is equivalent to `cuOccupancyMaxPotentialBlockSize`. It is currently only implemented on Cuda; AMDGPU and Host return unsupported. --------- Co-authored-by: Callum Fare <callum@codeplay.com>
The purpose of this fence is to ensure that any `dataSubmit`s inserted into a queue before a `dataFence` finish before finish before any `dataSubmit`s inserted after it begin. This is a no-op for most queues, since they are in-order, and by design any operations inserted into them occur in order. But the interface is supposed to be functional for out-of-order queues. The addition of the interface means that any operations that rely on such ordering (like ATTACH map-type support in #149036) can invoke it, without worrying about whether the underlying queue is in-order or out-of-order. Once a plugin supports out-of-order queues, the plugin can implement this function, without requiring any change at the libomptarget level. --------- Co-authored-by: Alex Duran <alejandro.duran@intel.com>
Add an `olLaunchHostFunction` method that allows enqueueing host work to the stream.
This sprinkles a few mutexes around the plugin interface so that the olLaunchKernel CTS test now passes when ran on multiple threads. Part of this also involved changing the interface for device synchronise so that it can optionally not free the underlying queue (which introduced a race condition in liboffload).
Add a device function to check if a device queue is empty. If liboffload tries to create an event for an empty queue, we create an "empty" event that is already complete. This allows `olCreateEvent`, `olSyncEvent` and `olWaitEvent` to run quickly for empty queues.
The `unloadBinaryImpl` method on the host plugin is now implemented properly (rather than just being a stub). When an image is unloaded, it is deallocated and the library associated with it is closed.