use context memeory variable in ascend memroy allocate

mindspore/ccsrc/device/ascend/ascend_memory_manager.cc

@@ -13,7 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-
+#include <string>
 #include "device/ascend/ascend_memory_manager.h"
 #include "device/ascend/ascend_memory_pool.h"
 #include "utils/context/ms_context.h"
@@ -21,25 +21,52 @@
 namespace mindspore {
 namespace device {
 namespace ascend {
-const uint64_t kAscendDeviceMemGB = 26;
-const uint64_t kAscendMemPoolGB = 4;
-const uint64_t kAscendDeviceMemSize = (kAscendDeviceMemGB << 30);
-const uint64_t kAscendMemPoolSize = (kAscendMemPoolGB << 30);
+constexpr uint64_t kAscendDeviceMemGB = 26;
+constexpr uint64_t kAscendMemPoolGB = 4;
+constexpr uint64_t kMemSizeGB = 30;
+constexpr uint64_t kMaxMemSizeGB = 30;
+constexpr uint64_t kAscendDeviceMemSize = (kAscendDeviceMemGB << kMemSizeGB);
+constexpr uint64_t kAscendMemPoolSize = (kAscendMemPoolGB << kMemSizeGB);
 
 void AscendMemoryManager::MallocDeviceMemory() {
-  device_mem_size_ = kAscendDeviceMemSize;
+  auto context_mem = GetDeviceMemSizeFromContext();
+  device_mem_size_ = context_mem == 0 ? kAscendDeviceMemSize : context_mem;
   static_mem_offset_ = device_mem_size_;
   auto ret = rtMalloc(reinterpret_cast<void **>(&device_mem_base_), static_mem_offset_, RT_MEMORY_HBM);
   if (ret != RT_ERROR_NONE) {
     MS_EXCEPTION(DeviceProcessError) << "rtMalloc mem size[" << static_mem_offset_ << "] fail, ret[" << ret << "]";
   }
-  device_mem_pool_size_ = kAscendMemPoolSize;
-  ret = rtMalloc(reinterpret_cast<void **>(&device_mem_pool_base_), device_mem_pool_size_, RT_MEMORY_HBM);
-  if (ret != RT_ERROR_NONE) {
-    MS_EXCEPTION(DeviceProcessError) << "rtMalloc mem size[" << device_mem_pool_size_ << "] fail, ret[" << ret << "]";
+
+  if (context_mem == 0) {
+    device_mem_pool_size_ = kAscendMemPoolSize;
+    ret = rtMalloc(reinterpret_cast<void **>(&device_mem_pool_base_), device_mem_pool_size_, RT_MEMORY_HBM);
+    if (ret != RT_ERROR_NONE) {
+      MS_EXCEPTION(DeviceProcessError) << "rtMalloc mem size[" << device_mem_pool_size_ << "] fail, ret[" << ret << "]";
+    }
+    AscendMemoryPool::GetInstance().set_device_mem_pool_base(device_mem_pool_base_);
+    AscendMemoryPool::GetInstance().set_device_mem_pool_size(device_mem_pool_size_);
+  }
+}
+
+uint64_t AscendMemoryManager::GetDeviceMemSizeFromContext() {
+  auto context = MsContext::GetInstance();
+  MS_EXCEPTION_IF_NULL(context);
+  auto variable_memory_max_size = context->variable_memory_max_size();
+  if (variable_memory_max_size == "0") {
+    return 0;
+  }
+  MS_LOG(INFO) << "context variable_memory_max_size:" << variable_memory_max_size;
+  auto pos = variable_memory_max_size.find('*');
+  if (pos == std::string::npos) {
+    MS_LOG(EXCEPTION) << "Invalid variable_memory_max_size";
+  }
+  auto gb_str = variable_memory_max_size.substr(0, pos);
+  auto gb_var = std::stoull(gb_str);
+  MS_LOG(INFO) << "variable_memory_max_size(GB):" << gb_var;
+  if (gb_var > kMaxMemSizeGB || gb_var == 0) {
+    MS_LOG(EXCEPTION) << "Invalid allocate memory size:" << gb_var << " which should be in (0-30]GB";
   }
-  AscendMemoryPool::GetInstance().set_device_mem_pool_base(device_mem_pool_base_);
-  AscendMemoryPool::GetInstance().set_device_mem_pool_size(device_mem_pool_size_);
+  return gb_var << kMemSizeGB;
 }
 
 void AscendMemoryManager::FreeDeviceMemory() {

mindspore/ccsrc/device/ascend/ascend_memory_manager.h

@@ -32,6 +32,8 @@ class AscendMemoryManager : public MemoryManager {
  private:
   uint8_t *device_mem_pool_base_{nullptr};
   uint64_t device_mem_pool_size_{0};
+
+  uint64_t GetDeviceMemSizeFromContext();
 };
 }  // namespace ascend
 }  // namespace device

mindspore/ccsrc/utils/context/ms_context.h

@@ -140,6 +140,10 @@ class MsContext {
     variable_memory_max_size_ = variable_memory_max_size;
   }
 
+  const std::string &variable_memory_max_size() const { return variable_memory_max_size_; }
+
+  const std::string &graph_memory_max_size() const { return graph_memory_max_size_; }
+
   void set_enable_profiling(bool flag) { profiling_mode_ = flag; }
   bool enable_profiling() const { return profiling_mode_; }