chore: import upstream snapshot with attribution

2026-07-13 12:47:05 +08:00
commit 4f3b7da785
7394 changed files with 2005594 additions and 0 deletions
@@ -0,0 +1,119 @@
+/* ******************************************************************************
+ *
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Apache License, Version 2.0 which is available at
+ * https://www.apache.org/licenses/LICENSE-2.0.
+ *
+ *  See the NOTICE file distributed with this work for additional
+ *  information regarding copyright ownership.
+ * 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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ ******************************************************************************/
+
+//
+// @author raver119@gmail.com
+//
+#include <exceptions/cuda_exception.h>
+#include <execution/AffinityManager.h>
+#include <execution/LaunchContext.h>
+#include <helpers/logger.h>
+
+thread_local int globalThreadToDevice = -1;
+
+namespace sd {
+std::mutex AffinityManager::_currentMutex;
+std::mutex AffinityManager::_numberMutex;
+int AffinityManager::_numberOfDevices = -1;
+
+int AffinityManager::currentDeviceId() {
+  // if there's no affinity set - set it now
+  if (globalThreadToDevice < 0) {
+    // this block must be thread-local
+    _currentMutex.lock();
+
+    globalThreadToDevice = _lastDevice++;
+
+    // we need to check if we've got deviceId >= number of actual devices, and reset to zero otherwise
+    if (globalThreadToDevice >= numberOfDevices()) {
+      globalThreadToDevice = 0;
+      _lastDevice = numberOfDevices() > 1 ? 1 : 0;
+    }
+
+    _currentMutex.unlock();
+
+    setCurrentNativeDevice(globalThreadToDevice);
+  }
+
+  // if we already know affinity - just return it
+  if (globalThreadToDevice >= 0) return globalThreadToDevice;
+
+  int dev = 0;
+  auto res = cudaGetDevice(&dev);
+
+  if (res != 0) throw cuda_exception::build("cudaGetDevice failed", res);
+
+  return dev;
+}
+
+int AffinityManager::currentNativeDeviceId() {
+  int dev = 0;
+  auto res = cudaGetDevice(&dev);
+
+  if (res != 0) throw cuda_exception::build("cudaGetDevice failed", res);
+
+  return dev;
+}
+
+int AffinityManager::numberOfDevices() {
+  _numberMutex.lock();
+  // we want to cache number of devices
+  if (_numberOfDevices <= 0) {
+    int dev = 0;
+    auto res = cudaGetDeviceCount(&dev);
+
+    if (res != 0) throw cuda_exception::build("cudaGetDeviceCount failed", res);
+
+    _numberOfDevices = dev;
+  }
+  _numberMutex.unlock();
+
+  return _numberOfDevices;
+}
+
+void AffinityManager::setCurrentNativeDevice(int deviceId) {
+  auto res = cudaSetDevice(deviceId);
+  if (res != 0) throw cuda_exception::build("setCurrentDevice failed", res);
+}
+
+void AffinityManager::setCurrentDevice(int deviceId) {
+  auto previousDeviceId = globalThreadToDevice;
+  if (previousDeviceId >= 0 && LaunchContext::isInitialized()) {
+    auto res = cudaStreamSynchronize(*LaunchContext::defaultContext()->getCudaStream());
+    if (res != 0) throw cuda_exception::build("setCurrentDevice -> sync failed", res);
+
+    res = cudaStreamSynchronize(*LaunchContext::defaultContext()->getCudaSpecialStream());
+    if (res != 0) throw cuda_exception::build("setCurrentDevice -> specialSync failed", res);
+
+    if (deviceId != previousDeviceId) {
+      // discard existing stuff
+      LaunchContext::releaseBuffers();
+    }
+  }
+
+  if (deviceId != previousDeviceId) {
+    auto res = cudaSetDevice(deviceId);
+    if (res != 0) throw cuda_exception::build("cudaSetDevice failed", res);
+  }
+
+  // update thread-device affinity
+  globalThreadToDevice = deviceId;
+}
+
+std::atomic<int> AffinityManager::_lastDevice;  // = std::atomic<int>(initialV);
+}  // namespace sd