Merge branch 'of_cnn_e2e' of https://github.com/Oneflow-Inc/OneFlow-Benchmark into of_cnn_e2e

Conflicts:
	cnn_e2e/job_function_util.py
	cnn_e2e/resnet_model.py

of_e2e.sh

 rm -rf core.* 
-DATA_ROOT=/dataset/ImageNet/ofrecord
+DATA_ROOT=/mnt/13_nfs/xuan/ImageNet/ofrecord
+#DATA_ROOT=/dataset/ImageNet/ofrecord
 #DATA_ROOT=/dataset/imagenet-mxnet
   #python3 cnn_benchmark/of_cnn_train_val.py \
 #gdb --args \
@@ -9,13 +10,13 @@ DATA_ROOT=/dataset/ImageNet/ofrecord
     --train_data_part_num=256 \
     --val_data_dir=$DATA_ROOT/validation \
     --val_data_part_num=256 \
-    --num_nodes=2 \
+    --num_nodes=1 \
     --node_ips='11.11.1.13,11.11.1.14' \
     --gpu_num_per_node=4 \
     --optimizer="momentum-cosine-decay" \
     --learning_rate=0.256 \
     --loss_print_every_n_iter=20 \
-    --batch_size_per_device=32 \
+    --batch_size_per_device=64 \
     --val_batch_size_per_device=125 \
     --model="resnet50" 
     #--use_fp16 true \