[GitHub] [incubator-mxnet] szha commented on issue #20109: 2.0 migration guide?

[GitBox <gi...@apache.org>]

szha commented on issue #20109:
URL: https://github.com/apache/incubator-mxnet/issues/20109#issuecomment-814159283


   Hi @matteosal. Thanks for looking into this.
   
   > Is this reasoning correct?
   
   Yes
   
   > Is there a way to selectively free CPU or GPU memory?
   
   Not yet, though this is indeed a useful functionality.
   
   > what happens if MXInvokeCachedOp is called multiple times with NDArrays of different shapes? Will the arrays share memory?
   
   When `static_alloc` is on and multiple calls with different shapes happen, cached op will enlarge the buffer size when necessary.
   
   > What is the purpose of flags forward_bulk_size and backward_bulk_size?
   
   These are flags for bulk execution. When bulk execution happens with `forward_bulk_size=x`, x number of operators will be executed in one call to the engine (scheduler) instead of x separate calls, so that the scheduling overhead is amortized.


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