Use ds-specific module id to avoid conflicts

deepspeed/runtime/zero/parameter_offload.py

@@ -240,7 +240,7 @@ def _start_of_forward_hook(module, *args):
         self.module.register_forward_pre_hook(_start_of_forward_hook)
 
         #likely one of them should be enough but just to be safe
-        self._register_hooks_recursively(self.module)
+        self._register_deepspeed_module(self.module)
 
         # Add top module to stack trace
         global FWD_MODULE_STACK
@@ -266,19 +266,19 @@ def mark_persistent_parameters(self, param_threshold, model_threshold):
 
         return persistent_params
 
-    def _register_hooks_recursively(self, module, count=[0]):
+    def _register_deepspeed_module(self, module, count=[0]):
         my_count = count[0]
-        module.id = my_count
+        module.ds_id = my_count
 
-        #print(f"{module.__class__} : {module.id}")
+        #print(f"{module.__class__} : {module.ds_id}")
 
         if z3_leaf_module(module):
             for param in module.parameters():
                 param.ds_z3_leaf_module = module
         else:
             for child in module.children():
                 count[0] = count[0] + 1
-                self._register_hooks_recursively(child, count=count)
+                self._register_deepspeed_module(child, count=count)
 
         @instrument_w_nvtx
         def _pre_forward_module_hook(module, *args):
@@ -463,14 +463,16 @@ def pre_sub_module_forward_function(self, sub_module):
 
     @torch.no_grad()
     def post_sub_module_forward_function(self, sub_module):
-        see_memory_usage(f"After sub module function {sub_module.__class__.__name__} {sub_module.id} before release",
-                         force=False)
+        see_memory_usage(
+            f"After sub module function {sub_module.__class__.__name__} {sub_module.ds_id} before release",
+            force=False)
 
         param_coordinator = self.get_param_coordinator()
         param_coordinator.release_sub_module(sub_module)
 
-        see_memory_usage(f"After sub module function {sub_module.__class__.__name__}  {sub_module.id} after release",
-                         force=False)
+        see_memory_usage(
+            f"After sub module function {sub_module.__class__.__name__}  {sub_module.ds_id} after release",
+            force=False)
 
     @torch.no_grad()
     def pre_sub_module_backward_function(self, sub_module):
@@ -485,13 +487,13 @@ def pre_sub_module_backward_function(self, sub_module):
     def post_sub_module_backward_function(self, sub_module):
         # assert sub_module.training, "backward pass is invalid for module in evaluation mode"
         see_memory_usage(
-            f"After sub module backward function {sub_module.__class__.__name__} {sub_module.id} before release",
+            f"After sub module backward function {sub_module.__class__.__name__} {sub_module.ds_id} before release",
             force=False)
 
         self.get_param_coordinator().release_sub_module(sub_module)
 
         see_memory_usage(
-            f"After sub module backward function {sub_module.__class__.__name__} {sub_module.id} after release",
+            f"After sub module backward function {sub_module.__class__.__name__} {sub_module.ds_id} after release",
             force=False)
 
     def _set_z3_leaf_modules_by_threshold(self, module, zero_module_granularity_threshold):

deepspeed/runtime/zero/partitioned_param_coordinator.py

@@ -172,17 +172,17 @@ def trace_prologue(self, sub_module: Module) -> None:
             # sub_module must match expectation else invalidate trace cache
             if len(self.__submodule_order) <= self.__step_id:
                 print_rank_0(
-                    f"Invalidate trace cache @ step {self.__step_id} and module {sub_module.id}: "
+                    f"Invalidate trace cache @ step {self.__step_id} and module {sub_module.ds_id}: "
                     f"cache has only {len(self.__submodule_order)} modules",
                     force=True)
                 self._invalidate_trace()
                 return
 
             if sub_module != self.__submodule_order[self.__step_id]:
-                expected_module_id = self.__submodule_order[self.__step_id].id
+                expected_module_id = self.__submodule_order[self.__step_id].ds_id
                 print_rank_0(
                     f"Invalidate trace cache @ step {self.__step_id}: "
-                    f"expected module {expected_module_id}, but got module {sub_module.id}",
+                    f"expected module {expected_module_id}, but got module {sub_module.ds_id}",
                     force=True)
                 self._invalidate_trace()
 
@@ -196,7 +196,7 @@ def record_module(self, sub_module: Module) -> None:
             raise RuntimeError(f"attempted to record trace when status = {self.__trace_mode}")
 
         self.__submodule_order.append(sub_module)
-        self.__step_id_module_fetched_for[sub_module.id].append(self.__step_id)
+        self.__step_id_module_fetched_for[sub_module.ds_id].append(self.__step_id)
 
     def record_parameters(self, sub_module: Module) -> None:
         if is_compiling():
@@ -205,7 +205,7 @@ def record_parameters(self, sub_module: Module) -> None:
         if not self.is_record_trace():
             raise RuntimeError(f"attempted to record trace when status = {self.__trace_mode}")
 
-        step_id = self.__step_id_module_fetched_for[sub_module.id].popleft()
+        step_id = self.__step_id_module_fetched_for[sub_module.ds_id].popleft()
         for param in sorted(set(iter_params(sub_module, recurse=z3_leaf_module(sub_module))), key=lambda p: p.ds_id):
             self.__param_order.append(__class__.__ParamInTrace(param=param, step_id_last_used_at=step_id))
 
@@ -225,7 +225,7 @@ def reset_step(self) -> None:
 
         if not self.is_complete_trace():  # not self.trace_complete:
             # Make sure that recorded submodule orders are identical across ranks
-            assert_ints_same_as_other_ranks([m.id for m in self.__submodule_order])
+            assert_ints_same_as_other_ranks([m.ds_id for m in self.__submodule_order])
 
             if self.is_record_trace():
                 # Successfully recorded a trace
@@ -238,7 +238,7 @@ def reset_step(self) -> None:
                 self.__param_order = tuple(self.__param_order)  # freeze
                 self.__trace_mode = ZeRoTraceMode.COMPLETE
                 print_rank_0(
-                    f"completed record trace of {len(self.__submodule_order)} sub modules: {[m.id for m in self.__submodule_order]}",
+                    f"completed record trace of {len(self.__submodule_order)} sub modules: {[m.ds_id for m in self.__submodule_order]}",
                     force=False)
             else:
                 # Enable trace recording for next forward/backward pass
@@ -281,7 +281,7 @@ def fetch_sub_module(self, current_submodule: Module, forward: bool) -> None:
         """
         if logger.isEnabledFor(logging.DEBUG):
             debug_rank0(
-                f"{self.__step_id}: M{current_submodule.id}({type(current_submodule).__name__}) P{[p.ds_id for p in iter_params(current_submodule, recurse=z3_leaf_module(current_submodule))]} "
+                f"{self.__step_id}: M{current_submodule.ds_id}({type(current_submodule).__name__}) P{[p.ds_id for p in iter_params(current_submodule, recurse=z3_leaf_module(current_submodule))]} "
                 + str({
                     "avail": f"{self.__n_available_params:.1e}",
                     "queue_sz": f"{len(self.__param_queue or [])}",
@@ -294,7 +294,7 @@ def fetch_sub_module(self, current_submodule: Module, forward: bool) -> None:
 
         if fetch_numel > 0:
             event_name = __class__.FORWARD_FETCH_SUBMIT if forward else __class__.BACKWARD_FETCH_SUBMIT
-            self._dump_param_ids(event_name, current_submodule.id,
+            self._dump_param_ids(event_name, current_submodule.ds_id,
                                  [p.ds_id for p in params_to_fetch if p.ds_status == ZeroParamStatus.NOT_AVAILABLE])
             self.__profiler.start_event(event_name)
             # kick off all gather for params in the immediately required submodule
@@ -310,7 +310,7 @@ def fetch_sub_module(self, current_submodule: Module, forward: bool) -> None:
         self.__profiler.start_event(wait_event_name)
         # wait for parameters in the immediately needed submodule to become available
         for param in params_to_fetch:
-            param.ds_active_sub_modules.add(current_submodule.id)
+            param.ds_active_sub_modules.add(current_submodule.ds_id)
             if logger.isEnabledFor(logging.DEBUG):
                 debug_rank0(f"-wait: {param.ds_summary()}")
             if param in self.__inflight_param_registry:
@@ -352,7 +352,7 @@ def fetch_sub_module(self, current_submodule: Module, forward: bool) -> None:
             if discarded_from_prefetch_queue != params_not_already_fetched:
                 raise RuntimeError(
                     f"tracing error at step {self.__step_id}: \n"
-                    f"module id: {current_submodule.id}, training: {current_submodule.training}\n"
+                    f"module id: {current_submodule.ds_id}, training: {current_submodule.training}\n"
                     f"expected the next {len(params_not_already_fetched)} parameters in the "
                     f"parameter fetch queue to be {tuple(p.ds_summary(use_debug_name=True) for p in params_not_already_fetched)} \n"
                     f"but got \n {tuple(p.ds_summary(use_debug_name=True) for p in discarded_from_prefetch_queue)}.")
@@ -413,7 +413,7 @@ def release_sub_module(self, submodule: Module) -> None:
         params_to_release = (self.__params_to_release(submodule, self.__step_id) if self.is_complete_trace() else set(
             p.ds_id for p in iter_params(submodule, recurse=z3_leaf_module(submodule))))
         for param in iter_params(submodule, recurse=z3_leaf_module(submodule)):
-            param.ds_active_sub_modules.discard(submodule.id)
+            param.ds_active_sub_modules.discard(submodule.ds_id)
             if param.ds_id in params_to_release and not param.is_external_param:
                 self.__release_param(param)
 

tests/unit/runtime/zero/test_zero.py

@@ -1673,3 +1673,37 @@ def test(self, prefetch_ratio, zero_stage=3):
             with torch.no_grad():
                 for batch in data_loader:
                     loss = model(batch[0], batch[1])
+
+
+# Avoid overwriting client module id
+# https://github.com/microsoft/DeepSpeed/issues/6772
+class TestZero3ClientModuleID(DistributedTest):
+    world_size = 2
+
+    def test_client_module_id(self):
+        config_dict = {
+            "train_micro_batch_size_per_gpu": 1,
+            "steps_per_print": 1,
+            "optimizer": {
+                "type": "Adam",
+            },
+            "zero_optimization": {
+                "stage": 3
+            },
+        }
+
+        class MyModel(torch.nn.Module):
+
+            def __init__(self):
+                super().__init__()
+                self.id = 3  # ID arbitrary client usage, e.g. GPU placement
+                self.fc = Linear(128, 128)
+
+            def forward(self, x):
+                return self.fc(x)
+
+        model = MyModel()
+        pre_init_m_id = model.id
+        model, _, _, _ = deepspeed.initialize(model=model, model_parameters=model.parameters(), config=config_dict)
+        post_init_m_id = model.id
+        assert pre_init_m_id == post_init_m_id