[AUTOTVM] Support multiple targets load in tophub (#1803)

python/tvm/autotvm/tophub.py

@@ -51,22 +51,25 @@ def context(target, extra_files=None):
 
     Parameters
     ----------
-    target: Target
+    target: Target or List of Target
         The compilation target
     extra_files: list of str, optional
         Extra log files to load
     """
     best_context = ApplyHistoryBest([])
 
-    if isinstance(target, str):
-        target = _target.create(target)
+    targets = target if isinstance(target, (list, tuple)) else [target]
+
+    for tgt in targets:
+        if isinstance(tgt, str):
+            tgt = _target.create(tgt)
 
         possible_names = []
-    for opt in target.options:
+        for opt in tgt.options:
             if opt.startswith("-device"):
                 device = _alias(opt[8:])
                 possible_names.append(device)
-    possible_names.append(target.target_name)
+        possible_names.append(tgt.target_name)
 
         all_packages = list(PACKAGE_VERSION.keys())
         for name in possible_names:

tutorials/nnvm/deploy_ssd.py

@@ -22,12 +22,20 @@ from mxnet.model import load_checkpoint
 
 
 ######################################################################
-# Set the parameters here
-# -----------------------
+# Preliminary and Set parameters
+# ------------------------------
+# We should build TVM with sort support, in TVM root directory
+#
+# .. code-block:: bash
+#
+#   echo "set(USE_SORT ON)" > config.mk
+#   make -j8
+#
 # .. note::
 #
 #   Currently we support compiling SSD on CPU only.
 #   GPU support is in progress.
+#
 
 model_name = "ssd_resnet50_512"
 model_file = "%s.zip" % model_name