Using untyped storage ref instead of tensor ref in memory tracker (#50)

max_mem_tracker.py

@@ -4,29 +4,31 @@
 from torch._subclasses.fake_tensor import FakeTensorMode
 from torch.utils.weak import WeakIdKeyDictionary
 import weakref
+import math
 
 # Track all the memory being used by Tensors.
 # Only max is tracked but others can be added.
 MEMORY_USE = WeakIdKeyDictionary()
 MEMORY_MAX = 0
-MEMORY_ID = 0
+# Minimum allocation size 
+PYTORCH_MIN_ALLOCATE = 2**9
 
 def update_stats():
     global MEMORY_MAX
     curr_use = 0
     for k, v in MEMORY_USE.items():
-        curr_use += k.nelement() * k.element_size()
+        curr_use += math.ceil(k.size() * k.element_size()/PYTORCH_MIN_ALLOCATE) * PYTORCH_MIN_ALLOCATE
 
     if MEMORY_MAX < curr_use:
         MEMORY_MAX = curr_use
 
 # Should be called on every Tensor created
-def track(t):
+def track(t:torch.Tensor):
     def cb(_):
         update_stats()
-
-    wt = weakref.ref(t, cb)
-    MEMORY_USE[t] = wt
+    st = t.untyped_storage()
+    wt = weakref.ref(st, cb)
+    MEMORY_USE[st] = wt
     update_stats()
 
 # Use this Mode to call track on every Tensor being created by functions