add command line option to use hive filler; add README (#17619)

Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/17619

--filler hive --iter -1 will let debugger exhaust all batches from a hive partition before exiting.
add README that summarizes command line options and usage.

Reviewed By: yinghai

Differential Revision: D14220166

fbshipit-source-id: daa23b7e8a9184481c6d7b67acf1599e5c99d74a

diff --git a/caffe2/predictor/emulator/data_filler.h b/caffe2/predictor/emulator/data_filler.h
index fa8f584..a540e4a 100644 (file)
--- a/caffe2/predictor/emulator/data_filler.h
+++ b/caffe2/predictor/emulator/data_filler.h
@@ -31,7 +31,9 @@ class Filler {
     for (const auto& item : *input_data) {
       bytes += item.nbytes();
     }
-    CAFFE_ENFORCE(bytes > 0, "input bytes should be positive");
+    if (bytes == 0) {
+      LOG(WARNING) << "0 input bytes filled";
+    }
 
     return bytes;
   }