Change services to actors except Policy and drop apps/rl

apps/grpo/main.py

@@ -264,15 +264,15 @@ async def main(cfg: DictConfig):
         ref_model,
         reward_actor,
     ) = await asyncio.gather(
-        DatasetActor.options(**cfg.services.dataset).as_service(**cfg.dataset),
+        DatasetActor.options(**cfg.actors.dataset).as_actor(**cfg.dataset),
         Policy.options(**cfg.services.policy).as_service(**cfg.policy),
-        RLTrainer.options(**cfg.services.trainer).as_service(
+        RLTrainer.options(**cfg.actors.trainer).as_actor(
             **cfg.trainer, loss=simple_grpo_loss
         ),
-        ReplayBuffer.options(**cfg.services.replay_buffer).as_service(
+        ReplayBuffer.options(**cfg.actors.replay_buffer).as_actor(
             **cfg.replay_buffer, collate=collate
         ),
-        ComputeAdvantages.options(**cfg.services.compute_advantages).as_service(),
+        ComputeAdvantages.options(**cfg.actors.compute_advantages).as_actor(),
         ReferenceModel.options(**cfg.services.ref_model).as_service(**cfg.ref_model),
         RewardActor.options(**cfg.services.reward_actor).as_service(
             reward_functions=[MathReward(), ThinkingReward()]
@@ -283,9 +283,9 @@ async def main(cfg: DictConfig):
     # ---- Core RL loops ---- #
     async def continuous_rollouts():
         rollout_count = 0
-        pad_id = await dataloader.pad_token.route()
+        pad_id = await dataloader.pad_token.choose()
         while True:
-            sample = await dataloader.sample.route()
+            sample = await dataloader.sample.choose()
             if sample is None:
                 print("Dataloader is empty, exiting continuous rollout")
                 return
@@ -332,17 +332,17 @@ async def continuous_rollouts():
             del ref_logits, ref_logprobs, input_ids
 
             # Calculate advantages and add to replay buffer
-            advantages = await compute_advantages.compute.route(group)
+            advantages = await compute_advantages.compute.choose(group)
             for episode, advantage in zip(group.episodes, advantages):
                 episode.advantage = advantage
-                await replay_buffer.add.route(episode)
+                await replay_buffer.add.choose(episode)
 
             # Log metrics
             avg_response_len = (
                 sum(len(e.response_tokens) for e in group.episodes) / group_size
             )
             mlogger.log("avg_response_len/rollout", avg_response_len, rollout_count)
-            buffer_size = await replay_buffer._numel.route()
+            buffer_size = await replay_buffer._numel.choose()
             mlogger.log("buffer_size/rollout", buffer_size, rollout_count)
             avg_reward = sum(e.reward for e in group.episodes) / group_size
             mlogger.log("avg_reward/rollout", avg_reward, rollout_count)
@@ -352,15 +352,16 @@ async def continuous_rollouts():
     async def continuous_training():
         training_step = 0
         while True:
-            batch = await replay_buffer.sample.route(curr_policy_version=training_step)
+            batch = await replay_buffer.sample.choose(curr_policy_version=training_step)
             if batch is None:
                 await asyncio.sleep(0.1)
             else:
                 inputs, targets = batch
-                loss = await trainer.train_step.route(inputs, targets)
+                loss = await trainer.train_step.choose(inputs, targets)
                 training_step += 1
                 mlogger.log("loss/training_step", loss, training_step)
-                await trainer.push_weights.fanout(training_step)
+
+                await trainer.push_weights.call(training_step)
                 await policy.update_weights.fanout(training_step)
 
     print("Starting GRPO training loops...")
@@ -377,11 +378,11 @@ async def continuous_training():
     finally:
         print("Shutting down...")
         await asyncio.gather(
-            dataloader.shutdown(),
+            DatasetActor.shutdown(dataloader),
             policy.shutdown(),
-            trainer.shutdown(),
-            replay_buffer.shutdown(),
-            compute_advantages.shutdown(),
+            RLTrainer.shutdown(trainer),
+            ReplayBuffer.shutdown(replay_buffer),
+            ComputeAdvantages.shutdown(compute_advantages),
             ref_model.shutdown(),
             reward_actor.shutdown(),
         )

apps/grpo/qwen3_1_7b.yaml

@@ -101,31 +101,29 @@ ref_model:
 
 # All resource allocations
 services:
-  dataset:
-    procs: 1
-    num_replicas: 1
-    with_gpus: false
   policy:
     procs: ${policy.engine_config.tensor_parallel_size}
     num_replicas: 1
     with_gpus: true
-  trainer:
+  ref_model:
     procs: 1
     num_replicas: 1
     with_gpus: true
-  replay_buffer:
+  reward_actor:
     procs: 1
     num_replicas: 1
     with_gpus: false
-  ref_model:
+
+actors:
+  dataset:
+    procs: 1
+    with_gpus: false
+  trainer:
     procs: 1
-    num_replicas: 1
     with_gpus: true
-  compute_advantages:
+  replay_buffer:
     procs: 1
-    num_replicas: 1
     with_gpus: false
-  reward_actor:
+  compute_advantages:
     procs: 1
-    num_replicas: 1
     with_gpus: false

apps/grpo/qwen3_8b.yaml

@@ -106,31 +106,29 @@ ref_model:
 
 # All resource allocations
 services:
-  dataset:
-    procs: 1
-    num_replicas: 1
-    with_gpus: false
   policy:
     procs: ${policy.engine_config.tensor_parallel_size}
     num_replicas: 1
     with_gpus: true
-  trainer:
-    procs: 2
+  ref_model:
+    procs: 1
     num_replicas: 1
     with_gpus: true
-  replay_buffer:
+  reward_actor:
     procs: 1
     num_replicas: 1
     with_gpus: false
-  ref_model:
+
+actors:
+  dataset:
     procs: 1
-    num_replicas: 1
+    with_gpus: false
+  trainer:
+    procs: 2
     with_gpus: true
-  compute_advantages:
+  replay_buffer:
     procs: 1
-    num_replicas: 1
     with_gpus: false
-  reward_actor:
+  compute_advantages:
     procs: 1
-    num_replicas: 1
     with_gpus: false

apps/grpo/qwen3_multinode.yaml

@@ -46,33 +46,31 @@ ref_model:
   model_name: ${model}
 
 services:
-  dataset:
-    procs: 1
-    num_replicas: 1
-    with_gpus: false
   policy:
     procs: 1
     hosts: 1
     num_replicas: 1
     with_gpus: true
-  trainer:
+  ref_model:
     procs: 1
-    hosts: 1
     num_replicas: 1
     with_gpus: true
-  replay_buffer:
+  reward_actor:
     procs: 1
     num_replicas: 1
     with_gpus: false
+
+actors:
+  dataset:
+    procs: 1
+    with_gpus: false
   compute_advantages:
     procs: 1
-    num_replicas: 1
     with_gpus: false
-  ref_model:
+  trainer:
     procs: 1
-    num_replicas: 1
+    hosts: 1
     with_gpus: true
-  reward_actor:
+  replay_buffer:
     procs: 1
-    num_replicas: 1
     with_gpus: false