larroy commented on issue #13438: libc getenv is not threadsafe
URL: 
https://github.com/apache/incubator-mxnet/issues/13438#issuecomment-444597140
 
 
   We should not use locking in the handlers in pthread_atfork, is a bad idea, 
in terms of lock contention and performance. We should find a solution using 
good architecture to pass the number of threads in the engine. threads get a 
data pointer where you can put configuration or pass any other data at creation 
time.

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