add test

tests/cpp/storage/storage_test.cc

@@ -1,5 +1,4 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one
+/* * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
  * distributed with this work for additional information
  * regarding copyright ownership.  The ASF licenses this file
@@ -22,6 +21,7 @@
  * \file storage_test.cc
  * \brief cpu/gpu storage tests
 */
+#include <stdlib.h>
 #include <gtest/gtest.h>
 #include <dmlc/logging.h>
 #include <mxnet/storage.h>
@@ -60,5 +60,39 @@ TEST(Storage, Basic_GPU) {
     storage->Free(handle);
   }
 }
+
+TEST(GPUStorage, Round_GPU) {
+  if (mxnet::test::unitTestsWithCuda) {
+    putenv("MXNET_GPU_MEM_POOL_ROUND_LINEAR_CUTOFF=20");
+    auto &&storage = mxnet::storage::GPUPooledRoundedStorageManager();
+    mxnet::Context context_gpu = mxnet::Context::GPU(0);
+    auto &&handle = mxnet::Storage::Handle();
+    auto &&handle2 = mxnet::Storage::Handle();
+    handle.ctx = context_gpu;
+    handle2.ctx = context_gpu;
+    handle.size = 32;
+    handle2.size = 2097153;
+    storage.Alloc(&handle);
+    storage.Alloc(&handle2);
+    assert(handle.size == 32);
+    assert(handle2.size == 2097153);
+    auto ptr = handle.dptr;
+    auto ptr2 = handle2.dptr;
+    storage.Free(handle);
+    storage.Free(handle2);
+
+    handle.size = 4095;
+    storage.Alloc(&handle);
+    EXPECT_EQ(handle.size, 4095);
+    EXPECT_EQ(handle.dptr, ptr);
+    storage.Free(handle);
+
+    handle2.size = 3145728;
+    storage.Alloc(&handle2);
+    EXPECT_EQ(handle2.size, 3145728);
+    EXPECT_EQ(handle2.dptr, ptr2);
+    storage.Free(handle2);
+  }
+}
 #endif  // MXNET_USE_CUDA