Clean up the server script

server.py

 import argparse
 from typing import List
 
+from cacheflow.master.frontend import Frontend
 from cacheflow.master.scheduler import Scheduler
 from cacheflow.worker.controller import Controller
 
@@ -8,15 +9,15 @@ parser = argparse.ArgumentParser(description='CacheFlow server')
 parser.add_argument('--model', type=str, default='facebook/opt-125m', help='model name')
 parser.add_argument('--num-nodes', type=int, default=1, help='number of nodes')
 parser.add_argument('--num-workers', type=int, default=1, help='number of workers per node')
-parser.add_argument('--block-size', type=int, default=8, help='block size')
-parser.add_argument('--num-gpu-blocks', type=int, default=1024, help='number of GPU blocks')
-parser.add_argument('--num-cpu-blocks', type=int, default=256, help='number of CPU blocks')
+parser.add_argument('--block-size', type=int, default=8, help='token block size')
+# TODO(woosuk): Add an analytical model to determine the maximum number of GPU/CPU blocks.
+parser.add_argument('--num-gpu-blocks', type=int, default=1024, help='number of GPU blocks (per GPU)')
+parser.add_argument('--num-cpu-blocks', type=int, default=256, help='number of CPU blocks (per GPU)')
+args = parser.parse_args()
 
 
 def main():
-    args = parser.parse_args()
-
-    # Create controllers.
+    # Create a controller for each node.
     controllers: List[Controller] = []
     for i in range(args.num_nodes):
         controller = Controller(
@@ -26,12 +27,18 @@ def main():
             block_size=args.block_size,
             num_gpu_blocks=args.num_gpu_blocks,
             num_cpu_blocks=args.num_cpu_blocks,
-            dtype='float',
         )
         controllers.append(controller)
 
+    # Create a frontend.
+    frontend = Frontend(
+        model_name=args.model,
+        block_size=args.block_size,
+    )
+
     # Create a scheduler.
     scheduler = Scheduler(
+        frontend=frontend,
         controllers=controllers,
         block_size=args.block_size,
         num_gpu_blocks=args.num_gpu_blocks,
@@ -42,65 +49,19 @@ def main():
         controllers[i].set_next(controllers[i + 1])
     controllers[-1].set_next(scheduler)
 
-    # seq_groups, max_num_steps, stop_token_ids = generate_inputs(1000, args.block_size)
-    seq_groups, max_num_steps, stop_token_ids = test_inputs(args.block_size)
-    scheduler.pending.extend(seq_groups)
-    scheduler.max_num_steps.update(max_num_steps)
-    scheduler.stop_token_ids.update(stop_token_ids)
+    test_inputs = [
+        'Ion Stoica is a',
+        'UC Berkeley is',
+        'The future of cloud computing is',
+    ]
+    for prompt in test_inputs:
+        frontend.query(prompt)
 
-    while scheduler.pending or scheduler.running:
-        scheduler.prepare()
+    # FIXME
+    while True:
         scheduler.step()
-
-
-def test_inputs(block_size):
-    from cacheflow.sequence import Sequence
-    from cacheflow.sequence import SequenceGroup
-    from cacheflow.utils import Counter
-
-    from transformers import AutoTokenizer
-    tokenizer = AutoTokenizer.from_pretrained('facebook/opt-125m')
-    prompt = "Hello, I'm am conscious and"
-    prompt_tokens = tokenizer.encode(prompt)
-
-    seq = Sequence(0, prompt_tokens, block_size=block_size)
-    seq_group = SequenceGroup(0, [seq])
-    seq_groups = [seq_group]
-    max_num_steps = {0: 8}
-    stop_token_ids = {0: []}
-    return seq_groups, max_num_steps, stop_token_ids
-
-
-def generate_inputs(num_inputs, block_size):
-    import random
-    random.seed(0)
-
-    from cacheflow.sequence import Sequence
-    from cacheflow.sequence import SequenceGroup
-    from cacheflow.utils import Counter
-
-    seq_group_counter = Counter()
-    seq_counter = Counter()
-
-    max_num_steps = {}
-    stop_token_ids = {}
-    seq_groups = []
-    for _ in range(num_inputs):
-        seq_group_id = next(seq_group_counter)
-
-        prompt_len = random.randint(16, 128)
-        max_num_steps[seq_group_id] = random.randint(32, 1024)
-        stop_token_ids[seq_group_id] = []
-
-        seqs = []
-        for _ in range(2):
-            seq_id = next(seq_counter)
-            seq = Sequence(seq_id, [0] * prompt_len, block_size=block_size)
-            seqs.append(seq)
-        seq_group = SequenceGroup(seq_group_id, seqs)
-        seq_groups.append(seq_group)
-
-    return seq_groups, max_num_steps, stop_token_ids
+        if not scheduler.pending and not scheduler.running:
+            break
 
 
 if __name__ == '__main__':