starimpact commented on issue #8695: Hangs training on P100
   i encountered the deadlock also....
   mxnet version is v0.8.0
   #0  pthread_cond_wait@@GLIBC_2.3.2 ()
   #1  0x00007f39f58198dc in 
std::condition_variable::wait(std::unique_lock<std::mutex>&) () from 
   #2  0x00007f39f7688559 in 
mxnet::engine::ThreadedEngine::WaitForVar(mxnet::engine::Var*) ()
   #3  0x00007f39f7701708 in mxnet::NDArray::SyncCopyToCPU(void*, unsigned 
long) const ()
   #4  0x00007f39f765d4ba in MXNDArraySyncCopyToCPU ()
   @eric-haibin-lin when is the deadlock fixed, can you give the md5 code of 
the commit or link of it?

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