If you have a pair of devices for which cuDeviceCanAccessPeer() is true, and you try
If you try to disable peer access cuCtxDisablePeerAccess() - you may get a failure, CUDA_ERROR_PEER_ACCESS_NOT_ENABLED. So, there's ability to access, and there's enablement of access. How does one check the state of enablement of access? That is, without disabling access?
How can I check whether CUDA device peer access is enabled (rather than supported)?
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