fix(mge): fix event pool destructor order issue and do full sync at python exit

GitOrigin-RevId: b9fa1f45b151295e5ae988419440819fe2d95f78

imperative/python/megengine/__init__.py

@@ -71,7 +71,9 @@ if sys.platform == "win32":
 
     kernel32.SetErrorMode(old_error_mode)
 
-from .core._imperative_rt.core2 import release_trace_apply_func, sync, full_sync
+from .core._imperative_rt.core2 import full_sync as _full_sync
+from .core._imperative_rt.core2 import release_trace_apply_func
+from .core._imperative_rt.core2 import sync as _sync
 from .core._imperative_rt.utils import _set_fork_exec_path_for_timed_func
 from .device import *
 from .logger import enable_debug_log, get_logger, set_log_file, set_log_level
@@ -89,10 +91,9 @@ _set_fork_exec_path_for_timed_func(
 _persistent_cache_impl_ins = persistent_cache.PersistentCacheOnServer()
 _persistent_cache_impl_ins.reg()
 
-atexit.register(sync)
+atexit.register(_full_sync)
 atexit.register(release_trace_apply_func)
 
-del sync
 del release_trace_apply_func
 del _set_fork_exec_path_for_timed_func
 del _persistent_cache_impl_ins

imperative/src/impl/interpreter_impl.cpp

@@ -24,6 +24,7 @@ std::unique_ptr<Interpreter::Channel> InterpreterImpl::create_channel() {
 }
 
 Interpreter& Interpreter::inst() {
+    Tensor::_static_init();
     static InterpreterImpl inst_;
     return inst_;
 }

imperative/src/impl/physical_tensor.cpp

@@ -56,6 +56,10 @@ protected:
         return {};
     }
 
+    AsyncReleaser() {
+        EventPool::without_timer();
+    }
+
 public:
     static AsyncReleaser* inst() {
         static AsyncReleaser releaser;
@@ -367,6 +371,10 @@ CompNode::Event* Tensor::get_or_create_event() {
     return e;
 }
 
+void Tensor::_static_init() {
+    EventPool::without_timer();
+}
+
 }  // namespace imperative
 }  // namespace mgb
 

imperative/src/include/megbrain/imperative/physical_tensor.h

@@ -130,6 +130,12 @@ public:
 
     void add_release_callback(CompNode cn);
     CompNode::Event* get_or_create_event();
+
+    // Make sure all static objects required to destruct a tensor has completed
+    // construction. All static storage duration object that holds tensors must
+    // call this method before their constructors completes.
+    static void _static_init();
+
 private:
 
     TensorLayout m_layout;