51e3c3d51b
Summary: This exposes the 'isDeviceCompatible' routine for checking if a binary *can* be loaded. This is useful if people don't want to consume errors everywhere when figuring out which image to put to what device. I don't know if this is a good name, I was thining like `olIsCompatible` or whatever. Let me know what you think. Long term I'd like to be able to do something similar to what OpenMP does where we can conditionally only initialize devices if we need them. That's going to be support needed if we want this to be more generic.
Liboffload
This directory contains the implementation of the work-in-progress new API for Offload. It builds on top of the existing plugin implementations but provides a single level of abstraction suitable for implementation of many offloading language runtimes, rather than just OpenMP.
Testing liboffload
The main test suite for liboffload can be run with the check-offload-unit
target, which runs the offload.unittests executable. The test suite will
automatically run on every available device, but can be restricted to a single
platform (CUDA, AMDGPU) with a command line argument:
$ ./offload.unittests --platform=CUDA
Tracing of Offload API calls can be enabled by setting the OFFLOAD_TRACE
environment variable. This works with any program that uses liboffload.
$ OFFLOAD_TRACE=1 ./offload.unittests
---> olInit()-> OL_SUCCESS
# etc
The host plugin is not currently supported.
Modifying liboffload
The main header (OffloadAPI.h) and some implementation details are
autogenerated with tablegen. See the API definition README
for implementation details.