[Openmp-commits] [openmp] [Libomptarget] Fix Nvidia offloading hanging on dataRetrieve using RPC (PR #66817)

[Johannes Doerfert via Openmp-commits]

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@@ -576,7 +576,16 @@ struct CUDADeviceTy : public GenericDeviceTy {
     if (auto Err = getStream(AsyncInfoWrapper, Stream))
       return Err;
 
-    CUresult Res = cuMemcpyDtoHAsync(HstPtr, (CUdeviceptr)TgtPtr, Size, Stream);
+    // If there is already pending work on the stream it could be waiting for
+    // someone to check the RPC server.
+    CUresult Res = cuStreamQuery(Stream);
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jdoerfert wrote:

`if (auto RCPServer = getRPCServer())` on the outside, not in the while.

https://github.com/llvm/llvm-project/pull/66817