diff --git a/configs/recognition/st_gcn_aaai18/kinetics-skeleton/test.yaml b/configs/recognition/st_gcn_aaai18/kinetics-skeleton/test.yaml
index e84435019..0a310c4b1 100644
--- a/configs/recognition/st_gcn_aaai18/kinetics-skeleton/test.yaml
+++ b/configs/recognition/st_gcn_aaai18/kinetics-skeleton/test.yaml
@@ -4,6 +4,9 @@ argparse_cfg:
     help: number of gpus
   batch_size:
     bind_to: processor_cfg.batch_size
+    type: int
+  gpu_batch_size:
+    bind_to: processor_cfg.gpu_batch_size
   checkpoint:
     bind_to: processor_cfg.checkpoint
     help: the checkpoint file to load from
@@ -31,5 +34,6 @@ processor_cfg:
     # debug: true
 
   # dataloader setting
-  batch_size: 64
-  gpus: 1
+  batch_size: null
+  gpu_batch_size: 64
+  gpus: -1
diff --git a/configs/recognition/st_gcn_aaai18/ntu-rgbd-xsub/test.yaml b/configs/recognition/st_gcn_aaai18/ntu-rgbd-xsub/test.yaml
index b3a9d410e..8ced91486 100644
--- a/configs/recognition/st_gcn_aaai18/ntu-rgbd-xsub/test.yaml
+++ b/configs/recognition/st_gcn_aaai18/ntu-rgbd-xsub/test.yaml
@@ -4,6 +4,9 @@ argparse_cfg:
     help: number of gpus
   batch_size:
     bind_to: processor_cfg.batch_size
+    type: int
+  gpu_batch_size:
+    bind_to: processor_cfg.gpu_batch_size
   checkpoint:
     bind_to: processor_cfg.checkpoint
     help: the checkpoint file to load from
@@ -32,5 +35,6 @@ processor_cfg:
     # debug: true
 
   # dataloader setting
-  batch_size: 64
-  gpus: 1
+  batch_size: null
+  gpu_batch_size: 64
+  gpus: -1
diff --git a/configs/recognition/st_gcn_aaai18/ntu-rgbd-xview/test.yaml b/configs/recognition/st_gcn_aaai18/ntu-rgbd-xview/test.yaml
index 87d45779f..0a90c55e2 100644
--- a/configs/recognition/st_gcn_aaai18/ntu-rgbd-xview/test.yaml
+++ b/configs/recognition/st_gcn_aaai18/ntu-rgbd-xview/test.yaml
@@ -4,6 +4,9 @@ argparse_cfg:
     help: number of gpus
   batch_size:
     bind_to: processor_cfg.batch_size
+    type: int
+  gpu_batch_size:
+    bind_to: processor_cfg.gpu_batch_size
   checkpoint:
     bind_to: processor_cfg.checkpoint
     help: the checkpoint file to load from
@@ -32,5 +35,6 @@ processor_cfg:
     # debug: true
 
   # dataloader setting
-  batch_size: 64
-  gpus: 1
+  batch_size: null
+  gpu_batch_size: 64
+  gpus: -1
diff --git a/mmskeleton/processor/recognition.py b/mmskeleton/processor/recognition.py
index e489f070a..a8b167b93 100644
--- a/mmskeleton/processor/recognition.py
+++ b/mmskeleton/processor/recognition.py
@@ -8,7 +8,21 @@
 from mmcv.parallel import MMDataParallel
 
 
-def test(model_cfg, dataset_cfg, checkpoint, batch_size=64, gpus=1, workers=4):
+def test(model_cfg,
+         dataset_cfg,
+         checkpoint,
+         batch_size=None,
+         gpu_batch_size=None,
+         gpus=-1,
+         workers=4):
+
+    # calculate batch size
+    if gpus < 0:
+        gpus = torch.cuda.device_count()
+    if (batch_size is None) and (gpu_batch_size is not None):
+        batch_size = gpu_batch_size * gpus
+    assert batch_size is not None, 'Please appoint batch_size or gpu_batch_size.'
+
     dataset = call_obj(**dataset_cfg)
     data_loader = torch.utils.data.DataLoader(dataset=dataset,
                                               batch_size=batch_size,
@@ -50,17 +64,25 @@ def train(
         loss_cfg,
         dataset_cfg,
         optimizer_cfg,
-        batch_size,
         total_epochs,
         training_hooks,
+        batch_size=None,
+        gpu_batch_size=None,
         workflow=[('train', 1)],
-        gpus=1,
+        gpus=-1,
         log_level=0,
         workers=4,
         resume_from=None,
         load_from=None,
 ):
 
+    # calculate batch size
+    if gpus < 0:
+        gpus = torch.cuda.device_count()
+    if (batch_size is None) and (gpu_batch_size is not None):
+        batch_size = gpu_batch_size * gpus
+    assert batch_size is not None, 'Please appoint batch_size or gpu_batch_size.'
+
     # prepare data loaders
     if isinstance(dataset_cfg, dict):
         dataset_cfg = [dataset_cfg]
@@ -79,9 +101,8 @@ def train(
     else:
         model = call_obj(**model_cfg)
     model.apply(weights_init)
-    print(111, len(model.edge_importance))
+
     model = MMDataParallel(model, device_ids=range(gpus)).cuda()
-    print(222, len(model.module.edge_importance))
     loss = call_obj(**loss_cfg)
 
     # build runner
@@ -96,7 +117,6 @@ def train(
 
     # run
     workflow = [tuple(w) for w in workflow]
-    print(222, len(model.module.edge_importance))
     runner.run(data_loaders, workflow, total_epochs, loss=loss)
 
 
diff --git a/mmskl.py b/mmskl.py
index da25c3454..33a6a9269 100644
--- a/mmskl.py
+++ b/mmskl.py
@@ -77,6 +77,8 @@ def parse_cfg():
         if 'type' not in info:
             if default is not None:
                 info['type'] = type(default)
+        else:
+            info['type'] = eval(info['type'])
         kwargs = dict(default=default)
         kwargs.update({k: v for k, v in info.items() if k != 'bind_to'})
         parser.add_argument('--' + key, **kwargs)