[hotfix] Resolving issue with missing CUDA NVML library for OpenCL

[stratika]

Description

This is a hotfix to resolve the problem that occurs if the OpenCL NVIDIA driver is installed but CUDA is not installed in the default paths. In this case the JNI functions that query the NVML functions are not working properly and an exception is thrown:

Exception in thread "main" java.lang.UnsatisfiedLinkError: 'long uk.ac.manchester.tornado.drivers.opencl.power.OCLNvidiaPowerMetric.clNvmlInit()'
	at tornado.drivers.opencl@1.0.4-dev/uk.ac.manchester.tornado.drivers.opencl.power.OCLNvidiaPowerMetric.clNvmlInit(Native Method)
	at tornado.drivers.opencl@1.0.4-dev/uk.ac.manchester.tornado.drivers.opencl.power.OCLNvidiaPowerMetric.initializePowerLibrary(OCLNvidiaPowerMetric.java:48)
	at tornado.drivers.opencl@1.0.4-dev/uk.ac.manchester.tornado.drivers.opencl.power.OCLNvidiaPowerMetric.<init>(OCLNvidiaPowerMetric.java:36)
	at tornado.drivers.opencl@1.0.4-dev/uk.ac.manchester.tornado.drivers.opencl.OCLDeviceContext.<init>(OCLDeviceContext.java:76)
	at tornado.drivers.opencl@1.0.4-dev/uk.ac.manchester.tornado.drivers.opencl.OCLContext.createDeviceContext(OCLContext.java:209)
	at tornado.drivers.opencl@1.0.4-dev/uk.ac.manchester.tornado.drivers.opencl.OCLContext.createDeviceContext(OCLContext.java:42)
	at tornado.drivers.opencl@1.0.4-dev/uk.ac.manchester.tornado.drivers.opencl.graal.OCLHotSpotBackendFactory.createJITCompiler(OCLHotSpotBackendFactory.java:95)
	at tornado.drivers.opencl@1.0.4-dev/uk.ac.manchester.tornado.drivers.opencl.OCLBackendImpl.createOCLJITCompiler(OCLBackendImpl.java:204)
	at tornado.drivers.opencl@1.0.4-dev/uk.ac.manchester.tornado.drivers.opencl.OCLBackendImpl.installDevices(OCLBackendImpl.java:218)
	at tornado.drivers.opencl@1.0.4-dev/uk.ac.manchester.tornado.drivers.opencl.OCLBackendImpl.lambda$discoverDevices$4(OCLBackendImpl.java:225)
	at java.base/java.util.stream.Streams$RangeIntSpliterator.forEachRemaining(Streams.java:104)
	at java.base/java.util.stream.IntPipeline$Head.forEach(IntPipeline.java:617)
	at tornado.drivers.opencl@1.0.4-dev/uk.ac.manchester.tornado.drivers.opencl.OCLBackendImpl.discoverDevices(OCLBackendImpl.java:223)
	at tornado.drivers.opencl@1.0.4-dev/uk.ac.manchester.tornado.drivers.opencl.OCLBackendImpl.<init>(OCLBackendImpl.java:76)
	at tornado.drivers.opencl@1.0.4-dev/uk.ac.manchester.tornado.drivers.opencl.OCLTornadoDriverProvider.createBackend(OCLTornadoDriverProvider.java:48)
	at tornado.runtime@1.0.4-dev/uk.ac.manchester.tornado.runtime.TornadoCoreRuntime.loadBackends(TornadoCoreRuntime.java:167)
	at tornado.runtime@1.0.4-dev/uk.ac.manchester.tornado.runtime.TornadoCoreRuntime.<init>(TornadoCoreRuntime.java:105)
	at tornado.runtime@1.0.4-dev/uk.ac.manchester.tornado.runtime.TornadoCoreRuntime.<clinit>(TornadoCoreRuntime.java:79)
	at tornado.drivers.common@1.0.4-dev/uk.ac.manchester.tornado.drivers.TornadoDeviceQuery.main(TornadoDeviceQuery.java:74)

Problem description

If the patch provides a fix for a bug, please describe what was the issue and how to reproduce the issue.

Backend/s tested

Mark the backends affected by this PR.

• OpenCL
• PTX
• SPIRV

OS tested

Mark the OS where this PR is tested.

• Linux
• OSx
• Windows

Did you check on FPGAs?

If it is applicable, check your changes on FPGAs.

• Yes
• No

How to test the new patch?

make BACKEND=opencl
tornado --enableProfiler console -m tornado.examples/uk.ac.manchester.tornado.examples.VectorAddInt --params="100000"

make BACKEND=ptx
tornado --enableProfiler console -m tornado.examples/uk.ac.manchester.tornado.examples.VectorAddInt --params="100000"

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[jjfumero]

I confirm this patch works in the cluster.

[mikepapadim]

Thanks for the fix