[GraphBolt][CUDA] GPUCachedFeature for multiGPU example. #7074
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Description
Adding GPUCache option to the multiGPU example. Helps performance tremendously, might get linear scaling on multiGPU machines now, with
--gpu-cache-size=1000000
. Later, when we have a larger scale dataset in this example, this option will be the key to good performance.I think the multiGPU example should demonstrate all the good practices recommended by us for optimal performance, hence the GPUCache should be available as an option here. Because one needs multiple GPUs when the performance with a single GPU is not sufficient.
Fixes #6955. Depends on #7073.
Checklist
Please feel free to remove inapplicable items for your PR.
Changes