Allow example tests to be run on subprocesses

Right now we just exec all tests in the main test process

cuda-python/cuda_core/tests/example_tests/utils.py

Line 35 in 213baf4

exec(script, env if env else {})

which is fine if there is no subtle bugs in the examples. However, it is not the end user experience (ex: from user perspective CUDA contexts are implicitly created/tear down between each sample runs). We should allow configuring it in the future.

Is this still in use?

It seems like there's not much going on in that script beyond the standard python script.py run. Happy to take a crack at deleting this file and replacing whatever is invoking it with something a bit less custom.

JIC/FYI: In the meantime I added this for testing cuda_pathfinder dynamic library loading in independent processes:

cuda-python/cuda_pathfinder/tests/spawned_process_runner.py

Lines 69 to 77 in ecb8113

    
               """Run `target` in a spawned child process, capturing stdout/stderr. 
        
               The provided `target` must be defined at the top level of a module, and must 
        
               be importable in the spawned child process. Lambdas, closures, or interactively 
        
               defined functions (e.g., in Jupyter notebooks) will not work. 
        
               If `rethrow=True` and the child process exits with a nonzero code, 
        
               raises ChildProcessError with the captured stderr. 
        
               """

I guess it could also be useful to isolate the cuda_core examples from each other?

I think this is done by Mike in #1800 and #1842. Closing!

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Allow example tests to be run on subprocesses #197

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	"""Run `target` in a spawned child process, capturing stdout/stderr.

	The provided `target` must be defined at the top level of a module, and must
	be importable in the spawned child process. Lambdas, closures, or interactively
	defined functions (e.g., in Jupyter notebooks) will not work.

	If `rethrow=True` and the child process exits with a nonzero code,
	raises ChildProcessError with the captured stderr.
	"""

Allow example tests to be run on subprocesses #197

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cpcloud commented on Aug 26, 2025

rwgk commented on Aug 26, 2025

leofang commented on Jul 1, 2026

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