tree 0ca7ca296fc5967142cfbf2cf2b76718859bb964
parent 9c7a1c8b8ed6762c098eb12a8976c1a21e329332
author A. Unique TensorFlower <gardener@tensorflow.org> 1567709165 -0700
committer TensorFlower Gardener <gardener@tensorflow.org> 1567709898 -0700

it seems that callback can be triggered after unsubscribe (bug in cupti). Defend ourselves from that.
probably due to not calling cuptiFinalize in CUDA 10.1. We will evaluate that.

PiperOrigin-RevId: 267419048