wkcn commented on a change in pull request #17762: Custom Operator Random
Number Generator Support
URL: https://github.com/apache/incubator-mxnet/pull/17762#discussion_r388013014
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File path: src/c_api/c_api.cc
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@@ -177,10 +177,39 @@ void CustomFComputeDispatcher(const std::string op_name,
return static_cast<void*>((*gpualloc)(size));
};
+ // MXNet random number generator lambda to be invoked by custom library
+ // custom library will use gpu rng whenever possible
+ auto rng_caller = [&](RandGenType rand_type, int seed) {
+#if MXNET_USE_CUDA
Review comment:
Some users may use MXNet built with `MXNET_USE_CUDA=1` on the machine with
only CPU. In this case, the GPU random number generator is not available.
It is better to decide which device to choose in the user-side code, namely
the code of custom operators.
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