[WIP] Added pinned memory resource

include/rmm/mr/pinned_memory_resource.hpp

@@ -0,0 +1,80 @@
+/*
+ * Copyright (c) 2019, NVIDIA CORPORATION.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#pragma once
+
+#include "device_memory_resource.hpp"
+
+#include <cuda_runtime_api.h>
+#include <cassert>
+#include <exception>
+#include <iostream>
+
+namespace rmm {
+namespace mr {
+/**---------------------------------------------------------------------------*
+ * @brief `device_memory_resource` derived class that uses cudaMalloc/Free for
+ * allocation/deallocation.
+ *---------------------------------------------------------------------------**/
+class pinned_memory_resource final : public device_memory_resource {
+ public:
+  bool supports_streams() const noexcept override { return false; }
+
+ private:
+  /**---------------------------------------------------------------------------*
+   * @brief Allocates memory of size at least \p bytes using cudaHostAlloc.
+   *
+   * The returned pointer has at least 256B alignment.
+   *
+   * @note Stream argument is ignored
+   *
+   * @throws `std::bad_alloc` if the requested allocation could not be fulfilled
+   *
+   * @param bytes The size, in bytes, of the allocation
+   * @return void* Pointer to the newly allocated memory
+   *---------------------------------------------------------------------------**/
+  void* do_allocate(std::size_t bytes, cudaStream_t) override {
+    void* p{nullptr};
+    cudaError_t const status = cudaHostAlloc(&p, bytes);
+    if (cudaSuccess != status) {
+#ifndef NDEBUG
+      std::cerr << "cudaMalloc failed: " << cudaGetErrorName(status) << " "
+                << cudaGetErrorString(status) << "\n";
+#endif
+      throw std::bad_alloc{};
+    }
+    return p;
+  }
+
+  /**---------------------------------------------------------------------------*
+   * @brief Deallocate memory pointed to by \p p.
+   *
+   * @note Stream argument is ignored.
+   *
+   * @throws Nothing.
+   *
+   * @param p Pointer to be deallocated
+   *---------------------------------------------------------------------------**/
+  void do_deallocate(void* p, std::size_t, cudaStream_t) override {
+    cudaError_t const status = cudaFreeHost(p);
+#ifndef NDEBUG
+    std::cerr << "cudaFree failed: " << cudaGetErrorName(status) << " "
+              << cudaGetErrorString(status) << "\n";
+#endif
+  }
+};
+
+}  // namespace mr
+}  // namespace rmm

tests/mr/mr_tests.cpp

@@ -85,7 +85,8 @@ struct MRTest : public ::testing::Test {
 
 using resources = ::testing::Types<rmm::mr::cuda_memory_resource,
                                    rmm::mr::managed_memory_resource,
-                                   rmm::mr::cnmem_memory_resource>;
+                                   rmm::mr::cnmem_memory_resource
+                                   rmm::mr::pinned_memory_resource>;
 
 TYPED_TEST_CASE(MRTest, resources);