[GitHub] marcoabreu commented on issue #12756: Is NDArray creatiton thread safe

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marcoabreu commented on issue #12756: Is NDArray creatiton thread safe
URL: https://github.com/apache/incubator-mxnet/issues/12756#issuecomment-427805168
 
 
   Hello,
   In general, mxnet is not threadsafe. It goes as far as not even being safe to be called using a mutex.
   
   Any interaction with mxnet has to happen with the same sticky thread in a single threaded fashion. Speak, if you use thread 1000 the first time you interact with mxnet, you always have to use thread 1000. This is called a dispatcher pattern.
   
   Many people like to synchronize threads by using a mutex, like thread 1000, 1001, 1002 etc. This will not work because we have thread local variables that won't be present if you call with different threads.
   
   Thus, you should create a dedicated thread for any interaction with mxnet and pipe your commands through that thread.

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