diff --git a/cacheflow/master/block_manager.py b/cacheflow/core/block_manager.py
similarity index 100%
rename from cacheflow/master/block_manager.py
rename to cacheflow/core/block_manager.py
diff --git a/cacheflow/master/policy.py b/cacheflow/core/policy.py
similarity index 100%
rename from cacheflow/master/policy.py
rename to cacheflow/core/policy.py
diff --git a/cacheflow/master/scheduler.py b/cacheflow/core/scheduler.py
similarity index 99%
rename from cacheflow/master/scheduler.py
rename to cacheflow/core/scheduler.py
index da461798..17c5c6d6 100644
--- a/cacheflow/master/scheduler.py
+++ b/cacheflow/core/scheduler.py
@@ -4,8 +4,8 @@ import pickle
 import time
 from typing import Any, Dict, List, Optional, Tuple
 
-from cacheflow.master.block_manager import BlockSpaceManager
-from cacheflow.master.policy import PolicyFactory
+from cacheflow.core.block_manager import BlockSpaceManager
+from cacheflow.core.policy import PolicyFactory
 from cacheflow.sampling_params import SamplingParams
 from cacheflow.sequence import Sequence
 from cacheflow.sequence import SequenceGroup
diff --git a/cacheflow/master/server.py b/cacheflow/core/server.py
similarity index 98%
rename from cacheflow/master/server.py
rename to cacheflow/core/server.py
index 694422e8..9047ccf6 100644
--- a/cacheflow/master/server.py
+++ b/cacheflow/core/server.py
@@ -8,20 +8,21 @@ try:
 except ImportError:
     ray = None
 
+from cacheflow.core.scheduler import Scheduler
+from cacheflow.frontend.simple_frontend import SimpleFrontend
 from cacheflow.logger import init_logger
-from cacheflow.master.scheduler import Scheduler
-from cacheflow.master.simple_frontend import SimpleFrontend
-from cacheflow.models import get_memory_analyzer
-from cacheflow.worker.controller import Controller, DeviceID
+from cacheflow.model_executor import get_memory_analyzer
 from cacheflow.sequence import SequenceGroup
 from cacheflow.sampling_params import SamplingParams
 from cacheflow.utils import get_gpu_memory, get_cpu_memory
+from cacheflow.worker.controller import Controller, DeviceID
 
 
 logger = init_logger(__name__)
 
 
 class Server:
+
     def __init__(
         self,
         model: str,
diff --git a/cacheflow/http_frontend/fastapi_frontend.py b/cacheflow/frontend/fastapi_frontend.py
similarity index 97%
rename from cacheflow/http_frontend/fastapi_frontend.py
rename to cacheflow/frontend/fastapi_frontend.py
index 55a5e2ee..e5c116d7 100644
--- a/cacheflow/http_frontend/fastapi_frontend.py
+++ b/cacheflow/frontend/fastapi_frontend.py
@@ -1,22 +1,22 @@
 import argparse
 import asyncio
+import json
 import time
 from typing import List, Dict, Optional
-import json
 
-import ray
-from transformers import AutoTokenizer
 from fastapi import FastAPI, Request
 from fastapi.responses import StreamingResponse
+import ray
+from transformers import AutoTokenizer
 import uvicorn
 
+from cacheflow.core.server import (Server, add_server_arguments,
+                                   process_server_arguments,
+                                   initialize_cluster)
 from cacheflow.sampling_params import SamplingParams
 from cacheflow.sequence import Sequence, SequenceGroup
-from cacheflow.master.server import (Server, add_server_arguments,
-                                     process_server_arguments,
-                                     initialize_cluster)
-from cacheflow.worker.controller import DeviceID
 from cacheflow.utils import Counter, get_gpu_memory, get_cpu_memory
+from cacheflow.worker.controller import DeviceID
 
 TIMEOUT_TO_PREVENT_DEADLOCK = 1 # seconds
 app = FastAPI()
diff --git a/cacheflow/master/simple_frontend.py b/cacheflow/frontend/simple_frontend.py
similarity index 100%
rename from cacheflow/master/simple_frontend.py
rename to cacheflow/frontend/simple_frontend.py
diff --git a/cacheflow/model_executor/__init__.py b/cacheflow/model_executor/__init__.py
new file mode 100644
index 00000000..d839756a
--- /dev/null
+++ b/cacheflow/model_executor/__init__.py
@@ -0,0 +1,11 @@
+from cacheflow.model_executor.input_metadata import InputMetadata
+from cacheflow.model_executor.model_loader import get_model, get_memory_analyzer
+from cacheflow.model_executor.utils import set_random_seed
+
+
+__all__ = [
+    "InputMetadata",
+    "get_model",
+    "get_memory_analyzer",
+    "set_random_seed",
+]
diff --git a/cacheflow/models/input_metadata.py b/cacheflow/model_executor/input_metadata.py
similarity index 100%
rename from cacheflow/models/input_metadata.py
rename to cacheflow/model_executor/input_metadata.py
diff --git a/cacheflow/models/activation.py b/cacheflow/model_executor/layers/activation.py
similarity index 100%
rename from cacheflow/models/activation.py
rename to cacheflow/model_executor/layers/activation.py
diff --git a/cacheflow/models/attention.py b/cacheflow/model_executor/layers/attention.py
similarity index 99%
rename from cacheflow/models/attention.py
rename to cacheflow/model_executor/layers/attention.py
index 179fbd0b..6d7b49ed 100644
--- a/cacheflow/models/attention.py
+++ b/cacheflow/model_executor/layers/attention.py
@@ -7,7 +7,7 @@ from xformers import ops as xops
 from cacheflow import attention_ops
 from cacheflow import cache_ops
 from cacheflow import pos_encoding_ops
-from cacheflow.models import InputMetadata
+from cacheflow.model_executor.input_metadata import InputMetadata
 
 
 class GPTCacheFlowAttention(nn.Module):
diff --git a/cacheflow/models/layernorm.py b/cacheflow/model_executor/layers/layernorm.py
similarity index 100%
rename from cacheflow/models/layernorm.py
rename to cacheflow/model_executor/layers/layernorm.py
diff --git a/cacheflow/models/sample.py b/cacheflow/model_executor/layers/sampler.py
similarity index 97%
rename from cacheflow/models/sample.py
rename to cacheflow/model_executor/layers/sampler.py
index dc488c81..b0bc8342 100644
--- a/cacheflow/models/sample.py
+++ b/cacheflow/model_executor/layers/sampler.py
@@ -3,10 +3,11 @@ from typing import Dict, List, Tuple
 import torch
 import torch.nn as nn
 
-from cacheflow.models import InputMetadata
+from cacheflow.model_executor.input_metadata import InputMetadata
+from cacheflow.model_executor.parallel_utils.tensor_parallel import (
+    gather_from_tensor_model_parallel_region)
 from cacheflow.sampling_params import SamplingParams
 from cacheflow.sequence import SequenceOutputs
-from cacheflow.parallel_utils.tensor_parallel import gather_from_tensor_model_parallel_region
 
 
 class Sampler(nn.Module):
@@ -27,7 +28,7 @@ class Sampler(nn.Module):
         # Get the logits for the next tokens.
         logits = torch.matmul(hidden_states, embedding.t())
         logits = gather_from_tensor_model_parallel_region(logits)
-        # Remove paddings in vocab.
+        # Remove paddings in vocab (if any).
         logits = logits[:, :self.vocab_size]
 
         # Apply temperature scaling.
diff --git a/cacheflow/models/memory_analyzer.py b/cacheflow/model_executor/memory_analyzer.py
similarity index 99%
rename from cacheflow/models/memory_analyzer.py
rename to cacheflow/model_executor/memory_analyzer.py
index 41f76df0..bc85d658 100644
--- a/cacheflow/models/memory_analyzer.py
+++ b/cacheflow/model_executor/memory_analyzer.py
@@ -2,7 +2,7 @@ import torch
 from transformers import AutoConfig
 
 from cacheflow.logger import init_logger
-from cacheflow.models.utils import get_dtype_size
+from cacheflow.model_executor.utils import get_dtype_size
 
 
 logger = init_logger(__name__)
diff --git a/cacheflow/models/model_utils.py b/cacheflow/model_executor/model_loader.py
similarity index 83%
rename from cacheflow/models/model_utils.py
rename to cacheflow/model_executor/model_loader.py
index ca838d5e..1af2c606 100644
--- a/cacheflow/models/model_utils.py
+++ b/cacheflow/model_executor/model_loader.py
@@ -5,16 +5,13 @@ import torch.nn as nn
 from transformers import AutoConfig
 from transformers import PretrainedConfig
 
-from cacheflow.models.memory_analyzer import CacheFlowMemoryAnalyzer
-from cacheflow.models.memory_analyzer import GPT2MemoryAnalyzer
-from cacheflow.models.memory_analyzer import GPTNeoXMemoryAnalyzer
-from cacheflow.models.memory_analyzer import LlamaMemoryAnalyzer
-from cacheflow.models.memory_analyzer import OPTMemoryAnalyzer
-from cacheflow.models.gpt2 import GPT2LMHeadModel
-from cacheflow.models.gpt_neox import GPTNeoXForCausalLM
-from cacheflow.models.llama import LlamaForCausalLM
-from cacheflow.models.opt import OPTForCausalLM
-from cacheflow.models.utils import get_torch_dtype
+from cacheflow.model_executor.memory_analyzer import (
+    CacheFlowMemoryAnalyzer, GPT2MemoryAnalyzer, GPTNeoXMemoryAnalyzer,
+    LlamaMemoryAnalyzer, OPTMemoryAnalyzer)
+from cacheflow.model_executor.models import (
+    GPT2LMHeadModel, GPTNeoXForCausalLM, LlamaForCausalLM, OPTForCausalLM)
+from cacheflow.model_executor.utils import get_torch_dtype
+from cacheflow.model_executor.weight_utils import initialize_dummy_weights
 
 
 _MODELS = {
@@ -77,7 +74,7 @@ def get_model(
                 model = model.cuda()
                 # NOTE(woosuk): For precise performance evaluation, we assign
                 # random values to the weights.
-                model.initialize_dummy_weights()
+                initialize_dummy_weights(model)
             else:
                 # Create a model instance.
                 model = model_class(config)
diff --git a/cacheflow/model_executor/models/__init__.py b/cacheflow/model_executor/models/__init__.py
new file mode 100644
index 00000000..8accaa6c
--- /dev/null
+++ b/cacheflow/model_executor/models/__init__.py
@@ -0,0 +1,12 @@
+from cacheflow.model_executor.models.gpt_neox import GPTNeoXForCausalLM
+from cacheflow.model_executor.models.gpt2 import GPT2LMHeadModel
+from cacheflow.model_executor.models.llama import LlamaForCausalLM
+from cacheflow.model_executor.models.opt import OPTForCausalLM
+
+
+__all__ = [
+    "GPT2LMHeadModel",
+    "GPTNeoXForCausalLM",
+    "LlamaForCausalLM",
+    "OPTForCausalLM",
+]
diff --git a/cacheflow/models/gpt2.py b/cacheflow/model_executor/models/gpt2.py
similarity index 93%
rename from cacheflow/models/gpt2.py
rename to cacheflow/model_executor/models/gpt2.py
index 1b30ced2..11e97722 100644
--- a/cacheflow/models/gpt2.py
+++ b/cacheflow/model_executor/models/gpt2.py
@@ -5,16 +5,15 @@ import torch
 from torch import nn
 from transformers import GPT2Config
 
-from cacheflow.models import InputMetadata
-from cacheflow.models.attention import GPTCacheFlowAttention
-from cacheflow.models.sample import Sampler
-from cacheflow.models.utils import (hf_model_weights_iterator,
-                                    load_tensor_parallel_weights)
-from cacheflow.parallel_utils.parallel_state import (
+from cacheflow.model_executor.input_metadata import InputMetadata
+from cacheflow.model_executor.layers.attention import GPTCacheFlowAttention
+from cacheflow.model_executor.layers.sampler import Sampler
+from cacheflow.model_executor.weight_utils import (hf_model_weights_iterator,
+                                                   load_tensor_parallel_weights)
+from cacheflow.model_executor.parallel_utils.parallel_state import (
     get_tensor_model_parallel_rank, get_tensor_model_parallel_world_size)
-from cacheflow.parallel_utils.tensor_parallel import (VocabParallelEmbedding,
-                                                      ColumnParallelLinear,
-                                                      RowParallelLinear)
+from cacheflow.model_executor.parallel_utils.tensor_parallel import (
+    VocabParallelEmbedding, ColumnParallelLinear, RowParallelLinear)
 from cacheflow.sequence import SequenceOutputs
 
 KVCache = Tuple[torch.Tensor, torch.Tensor]
@@ -258,8 +257,5 @@ class GPT2LMHeadModel(nn.Module):
                     raise ValueError(f"Unexpected parameter name {name}")
             load_tensor_parallel_weights(param, loaded_weight, name,
                                          self._column_parallel_weights,
-                                         self._row_parallel_weights)
-
-    def initialize_dummy_weights(self) -> None:
-        for param in self.state_dict().values():
-            param.data.uniform_(-1e-3, 1e-3)
+                                         self._row_parallel_weights,
+                                         tensor_model_parallel_rank)
diff --git a/cacheflow/models/gpt_neox.py b/cacheflow/model_executor/models/gpt_neox.py
similarity index 91%
rename from cacheflow/models/gpt_neox.py
rename to cacheflow/model_executor/models/gpt_neox.py
index fb85e2f7..c50aa68e 100644
--- a/cacheflow/models/gpt_neox.py
+++ b/cacheflow/model_executor/models/gpt_neox.py
@@ -3,17 +3,17 @@ from typing import Dict, List, Optional, Tuple
 
 import torch
 from torch import nn
+from transformers import GPTNeoXConfig
 
-from cacheflow.models import InputMetadata
-from cacheflow.models.attention import GPTNeoXCacheFlowAttention
-from cacheflow.models.sample import Sampler
-from cacheflow.models.utils import (hf_model_weights_iterator,
-                                    load_tensor_parallel_weights)
-from cacheflow.parallel_utils.parallel_state import (
+from cacheflow.model_executor.input_metadata import InputMetadata
+from cacheflow.model_executor.layers.attention import GPTNeoXCacheFlowAttention
+from cacheflow.model_executor.layers.sampler import Sampler
+from cacheflow.model_executor.weight_utils import (hf_model_weights_iterator,
+                                                   load_tensor_parallel_weights)
+from cacheflow.model_executor.parallel_utils.parallel_state import (
     get_tensor_model_parallel_rank, get_tensor_model_parallel_world_size)
-from cacheflow.parallel_utils.tensor_parallel import (VocabParallelEmbedding,
-                                                      ColumnParallelLinear,
-                                                      RowParallelLinear)
+from cacheflow.model_executor.parallel_utils.tensor_parallel import (
+    VocabParallelEmbedding, ColumnParallelLinear, RowParallelLinear)
 from cacheflow.sequence import SequenceOutputs
 
 KVCache = Tuple[torch.Tensor, torch.Tensor]
@@ -21,7 +21,7 @@ KVCache = Tuple[torch.Tensor, torch.Tensor]
 
 class GPTNeoXAttention(nn.Module):
 
-    def __init__(self, config):
+    def __init__(self, config: GPTNeoXConfig):
         super().__init__()
         self.total_num_heads = config.num_attention_heads
         self.hidden_size = config.hidden_size
@@ -63,7 +63,7 @@ class GPTNeoXAttention(nn.Module):
 
 
 class GPTNeoXMLP(nn.Module):
-    def __init__(self, config):
+    def __init__(self, config: GPTNeoXConfig):
         super().__init__()
         self.dense_h_to_4h = ColumnParallelLinear(config.hidden_size,
                                                   config.intermediate_size,
@@ -86,7 +86,7 @@ class GPTNeoXMLP(nn.Module):
 
 class GPTNeoXLayer(nn.Module):
 
-    def __init__(self, config):
+    def __init__(self, config: GPTNeoXConfig):
         super().__init__()
         self.use_parallel_residual = config.use_parallel_residual
         self.input_layernorm = nn.LayerNorm(config.hidden_size, eps=config.layer_norm_eps)
@@ -129,7 +129,7 @@ class GPTNeoXLayer(nn.Module):
 
 
 class GPTNeoXModel(nn.Module):
-    def __init__(self, config):
+    def __init__(self, config: GPTNeoXConfig):
         super().__init__()
         self.config = config
 
@@ -227,8 +227,5 @@ class GPTNeoXForCausalLM(nn.Module):
                     raise ValueError(f"Unexpected weight name: {name}")
             load_tensor_parallel_weights(param, loaded_weight, name,
                                          self._column_parallel_weights,
-                                         self._row_parallel_weights)
-
-    def initialize_dummy_weights(self) -> None:
-        for param in self.state_dict().values():
-            param.data.uniform_(-1e-3, 1e-3)
+                                         self._row_parallel_weights,
+                                         tensor_model_parallel_rank)
diff --git a/cacheflow/models/llama.py b/cacheflow/model_executor/models/llama.py
similarity index 92%
rename from cacheflow/models/llama.py
rename to cacheflow/model_executor/models/llama.py
index 0669742d..b278d989 100644
--- a/cacheflow/models/llama.py
+++ b/cacheflow/model_executor/models/llama.py
@@ -5,18 +5,18 @@ import torch
 from torch import nn
 from transformers import LlamaConfig
 
-from cacheflow.models import InputMetadata
-from cacheflow.models.activation import SiluAndMul
-from cacheflow.models.attention import GPTNeoXCacheFlowAttention
-from cacheflow.models.layernorm import RMSNorm
-from cacheflow.models.sample import Sampler
-from cacheflow.models.utils import (hf_model_weights_iterator,
-                                    load_tensor_parallel_weights)
-from cacheflow.parallel_utils.parallel_state import (
+from cacheflow.sequence import SequenceOutputs
+from cacheflow.model_executor.input_metadata import InputMetadata
+from cacheflow.model_executor.layers.activation import SiluAndMul
+from cacheflow.model_executor.layers.layernorm import RMSNorm
+from cacheflow.model_executor.layers.attention import GPTNeoXCacheFlowAttention
+from cacheflow.model_executor.layers.sampler import Sampler
+from cacheflow.model_executor.weight_utils import (hf_model_weights_iterator,
+                                                   load_tensor_parallel_weights)
+from cacheflow.model_executor.parallel_utils.parallel_state import (
     get_tensor_model_parallel_rank, get_tensor_model_parallel_world_size)
-from cacheflow.parallel_utils.tensor_parallel import (VocabParallelEmbedding,
-                                                      ColumnParallelLinear,
-                                                      RowParallelLinear)
+from cacheflow.model_executor.parallel_utils.tensor_parallel import (
+    VocabParallelEmbedding, ColumnParallelLinear, RowParallelLinear)
 from cacheflow.sequence import SequenceOutputs
 
 KVCache = Tuple[torch.Tensor, torch.Tensor]
@@ -263,8 +263,5 @@ class LlamaForCausalLM(nn.Module):
             param = state_dict[name]
             load_tensor_parallel_weights(param, loaded_weight, name,
                                          self._column_parallel_weights,
-                                         self._row_parallel_weights)
-
-    def initialize_dummy_weights(self) -> None:
-        for param in self.state_dict().values():
-            param.data.uniform_(-1e-3, 1e-3)
+                                         self._row_parallel_weights,
+                                         tensor_model_parallel_rank)
diff --git a/cacheflow/models/opt.py b/cacheflow/model_executor/models/opt.py
similarity index 94%
rename from cacheflow/models/opt.py
rename to cacheflow/model_executor/models/opt.py
index 4f1e729c..fea60408 100644
--- a/cacheflow/models/opt.py
+++ b/cacheflow/model_executor/models/opt.py
@@ -5,16 +5,15 @@ import torch
 from torch import nn
 from transformers import OPTConfig
 
-from cacheflow.models import InputMetadata
-from cacheflow.models.attention import GPTCacheFlowAttention
-from cacheflow.models.sample import Sampler
-from cacheflow.models.utils import (hf_model_weights_iterator,
-                                    load_tensor_parallel_weights)
-from cacheflow.parallel_utils.parallel_state import (
+from cacheflow.model_executor.input_metadata import InputMetadata
+from cacheflow.model_executor.layers.attention import GPTCacheFlowAttention
+from cacheflow.model_executor.layers.sampler import Sampler
+from cacheflow.model_executor.weight_utils import (hf_model_weights_iterator,
+                                                   load_tensor_parallel_weights)
+from cacheflow.model_executor.parallel_utils.parallel_state import (
     get_tensor_model_parallel_rank, get_tensor_model_parallel_world_size)
-from cacheflow.parallel_utils.tensor_parallel import (VocabParallelEmbedding,
-                                                      ColumnParallelLinear,
-                                                      RowParallelLinear)
+from cacheflow.model_executor.parallel_utils.tensor_parallel import (
+    VocabParallelEmbedding, ColumnParallelLinear, RowParallelLinear)
 from cacheflow.sequence import SequenceOutputs
 
 KVCache = Tuple[torch.Tensor, torch.Tensor]
@@ -288,8 +287,5 @@ class OPTForCausalLM(nn.Module):
             param = state_dict[name]
             load_tensor_parallel_weights(param, loaded_weight, name,
                                          self._column_parallel_weights,
-                                         self._row_parallel_weights)
-
-    def initialize_dummy_weights(self) -> None:
-        for param in self.state_dict().values():
-            param.data.uniform_(-1e-3, 1e-3)
+                                         self._row_parallel_weights,
+                                         tensor_model_parallel_rank)
diff --git a/cacheflow/parallel_utils/README.md b/cacheflow/model_executor/parallel_utils/README.md
similarity index 100%
rename from cacheflow/parallel_utils/README.md
rename to cacheflow/model_executor/parallel_utils/README.md
diff --git a/cacheflow/model_executor/parallel_utils/__init__.py b/cacheflow/model_executor/parallel_utils/__init__.py
new file mode 100644
index 00000000..11b6fa22
--- /dev/null
+++ b/cacheflow/model_executor/parallel_utils/__init__.py
@@ -0,0 +1,12 @@
+import cacheflow.model_executor.parallel_utils.parallel_state
+import cacheflow.model_executor.parallel_utils.tensor_parallel
+import cacheflow.model_executor.parallel_utils.utils
+
+# Alias parallel_state as mpu, its legacy name
+mpu = parallel_state
+
+__all__ = [
+    "parallel_state",
+    "tensor_parallel",
+    "utils",
+]
diff --git a/cacheflow/parallel_utils/parallel_state.py b/cacheflow/model_executor/parallel_utils/parallel_state.py
similarity index 100%
rename from cacheflow/parallel_utils/parallel_state.py
rename to cacheflow/model_executor/parallel_utils/parallel_state.py
diff --git a/cacheflow/parallel_utils/tensor_parallel/__init__.py b/cacheflow/model_executor/parallel_utils/tensor_parallel/__init__.py
similarity index 100%
rename from cacheflow/parallel_utils/tensor_parallel/__init__.py
rename to cacheflow/model_executor/parallel_utils/tensor_parallel/__init__.py
diff --git a/cacheflow/parallel_utils/tensor_parallel/layers.py b/cacheflow/model_executor/parallel_utils/tensor_parallel/layers.py
similarity index 99%
rename from cacheflow/parallel_utils/tensor_parallel/layers.py
rename to cacheflow/model_executor/parallel_utils/tensor_parallel/layers.py
index 2cbe2b8a..fef8ff74 100644
--- a/cacheflow/parallel_utils/tensor_parallel/layers.py
+++ b/cacheflow/model_executor/parallel_utils/tensor_parallel/layers.py
@@ -9,7 +9,7 @@ import torch.nn.functional as F
 import torch.nn.init as init
 from torch.nn.parameter import Parameter
 
-from cacheflow.parallel_utils.parallel_state import (
+from cacheflow.model_executor.parallel_utils.parallel_state import (
     get_tensor_model_parallel_rank,
     get_tensor_model_parallel_world_size,
     get_all_reduce_launcher,
diff --git a/cacheflow/parallel_utils/tensor_parallel/mappings.py b/cacheflow/model_executor/parallel_utils/tensor_parallel/mappings.py
similarity index 99%
rename from cacheflow/parallel_utils/tensor_parallel/mappings.py
rename to cacheflow/model_executor/parallel_utils/tensor_parallel/mappings.py
index d9ca3b46..4352514b 100644
--- a/cacheflow/parallel_utils/tensor_parallel/mappings.py
+++ b/cacheflow/model_executor/parallel_utils/tensor_parallel/mappings.py
@@ -2,7 +2,7 @@
 
 import torch
 
-from cacheflow.parallel_utils.parallel_state import (
+from cacheflow.model_executor.parallel_utils.parallel_state import (
     get_tensor_model_parallel_rank,
     get_tensor_model_parallel_world_size,
     get_tensor_model_parallel_group,
diff --git a/cacheflow/parallel_utils/tensor_parallel/random.py b/cacheflow/model_executor/parallel_utils/tensor_parallel/random.py
similarity index 98%
rename from cacheflow/parallel_utils/tensor_parallel/random.py
rename to cacheflow/model_executor/parallel_utils/tensor_parallel/random.py
index 6f36febd..1374f13b 100644
--- a/cacheflow/parallel_utils/tensor_parallel/random.py
+++ b/cacheflow/model_executor/parallel_utils/tensor_parallel/random.py
@@ -10,7 +10,7 @@ from torch import _C
 from torch.cuda import _lazy_call, device as device_ctx_manager
 from torch.utils.checkpoint import detach_variable
 
-from cacheflow.parallel_utils.parallel_state import (
+from cacheflow.model_executor.parallel_utils.parallel_state import (
     get_data_parallel_rank,
     get_tensor_model_parallel_group,
     get_tensor_model_parallel_rank,
@@ -22,7 +22,7 @@ from .utils import (
     gather_split_1d_tensor,
 )
 
-from cacheflow.parallel_utils.utils import safely_set_viewless_tensor_data
+from cacheflow.model_executor.parallel_utils.utils import safely_set_viewless_tensor_data
 
 # Default name for the model parallel rng tracker.
 _MODEL_PARALLEL_RNG_TRACKER_NAME = 'model-parallel-rng'
diff --git a/cacheflow/parallel_utils/tensor_parallel/utils.py b/cacheflow/model_executor/parallel_utils/tensor_parallel/utils.py
similarity index 96%
rename from cacheflow/parallel_utils/tensor_parallel/utils.py
rename to cacheflow/model_executor/parallel_utils/tensor_parallel/utils.py
index dd15faa9..e8e6c81b 100644
--- a/cacheflow/parallel_utils/tensor_parallel/utils.py
+++ b/cacheflow/model_executor/parallel_utils/tensor_parallel/utils.py
@@ -3,8 +3,8 @@
 import torch
 from typing import List, Sequence
 
-from cacheflow.parallel_utils.utils import divide
-from cacheflow.parallel_utils import parallel_state
+from cacheflow.model_executor.parallel_utils.utils import divide
+from cacheflow.model_executor.parallel_utils import parallel_state
 
 def split_tensor_along_last_dim(
     tensor: torch.Tensor,
diff --git a/cacheflow/parallel_utils/utils.py b/cacheflow/model_executor/parallel_utils/utils.py
similarity index 98%
rename from cacheflow/parallel_utils/utils.py
rename to cacheflow/model_executor/parallel_utils/utils.py
index 4b2b7613..c81e0afa 100644
--- a/cacheflow/parallel_utils/utils.py
+++ b/cacheflow/model_executor/parallel_utils/utils.py
@@ -4,7 +4,7 @@ import operator
 
 import torch
 
-from cacheflow.parallel_utils import parallel_state
+from cacheflow.model_executor.parallel_utils import parallel_state
 
 
 def ensure_divisibility(numerator, denominator):
diff --git a/cacheflow/model_executor/utils.py b/cacheflow/model_executor/utils.py
new file mode 100644
index 00000000..72f76a25
--- /dev/null
+++ b/cacheflow/model_executor/utils.py
@@ -0,0 +1,41 @@
+import random
+from typing import Union
+
+import numpy as np
+import torch
+
+from cacheflow.model_executor.parallel_utils.parallel_state import model_parallel_is_initialized
+from cacheflow.model_executor.parallel_utils.tensor_parallel import model_parallel_cuda_manual_seed
+
+
+_STR_DTYPE_TO_TORCH_DTYPE = {
+    'half': torch.half,
+    'float': torch.float,
+    'float16': torch.float16,
+    'float32': torch.float32,
+    'bfloat16': torch.bfloat16,
+}
+
+
+def get_torch_dtype(dtype: Union[torch.dtype, str]) -> torch.dtype:
+    if isinstance(dtype, str):
+        torch_dtype = _STR_DTYPE_TO_TORCH_DTYPE[dtype.lower()]
+    else:
+        torch_dtype = dtype
+    return torch_dtype
+
+
+def get_dtype_size(dtype: Union[torch.dtype, str]) -> int:
+    torch_dtype = get_torch_dtype(dtype)
+    return torch.tensor([], dtype=torch_dtype).element_size()
+
+
+def set_random_seed(seed: int) -> None:
+    random.seed(seed)
+    np.random.seed(seed)
+    torch.manual_seed(seed)
+    if torch.cuda.is_available():
+        torch.cuda.manual_seed_all(seed)
+
+    if model_parallel_is_initialized():
+        model_parallel_cuda_manual_seed(seed)
diff --git a/cacheflow/models/utils.py b/cacheflow/model_executor/weight_utils.py
similarity index 74%
rename from cacheflow/models/utils.py
rename to cacheflow/model_executor/weight_utils.py
index ced58c54..796bfffb 100644
--- a/cacheflow/models/utils.py
+++ b/cacheflow/model_executor/weight_utils.py
@@ -1,47 +1,26 @@
-import os
+import filelock
 import glob
 import json
-import filelock
-from typing import Union, Optional
+import os
+from typing import Iterator, List, Optional, Tuple
 
+from huggingface_hub import snapshot_download
 import numpy as np
 import torch
 from tqdm.auto import tqdm
-from huggingface_hub import snapshot_download
-from cacheflow.parallel_utils.parallel_state import (
-    get_tensor_model_parallel_rank)
-
-
-_STR_DTYPE_TO_TORCH_DTYPE = {
-    'half': torch.half,
-    'float': torch.float,
-    'float16': torch.float16,
-    'float32': torch.float32,
-    'bfloat16': torch.bfloat16,
-}
-
-
-def get_torch_dtype(dtype: Union[torch.dtype, str]) -> torch.dtype:
-    if isinstance(dtype, str):
-        torch_dtype = _STR_DTYPE_TO_TORCH_DTYPE[dtype.lower()]
-    else:
-        torch_dtype = dtype
-    return torch_dtype
-
-
-def get_dtype_size(dtype: Union[torch.dtype, str]) -> int:
-    torch_dtype = get_torch_dtype(dtype)
-    return torch.tensor([], dtype=torch_dtype).element_size()
 
 
 class Disabledtqdm(tqdm):
+
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs, disable=True)
 
 
-def hf_model_weights_iterator(model_name_or_path: str,
-                              cache_dir: Optional[str] = None,
-                              use_np_cache: bool = False):
+def hf_model_weights_iterator(
+    model_name_or_path: str,
+    cache_dir: Optional[str] = None,
+    use_np_cache: bool = False,
+) -> Iterator[Tuple[str, torch.Tensor]]:
     # Prepare file lock directory to prevent multiple processes from
     # downloading the same model weights at the same time.
     lock_dir = cache_dir if cache_dir is not None else "/tmp"
@@ -95,10 +74,14 @@ def hf_model_weights_iterator(model_name_or_path: str,
                 yield name, param
 
 
-def load_tensor_parallel_weights(param, loaded_weight, param_name,
-                                 column_parallel_weight_names,
-                                 row_parallel_weight_names):
-    tensor_model_parallel_rank = get_tensor_model_parallel_rank()
+def load_tensor_parallel_weights(
+    param: torch.Tensor,
+    loaded_weight: torch.Tensor,
+    param_name: str,
+    column_parallel_weight_names: List[str],
+    row_parallel_weight_names: List[str],
+    tensor_model_parallel_rank: int,
+) -> None:
     for p in column_parallel_weight_names:
         if p in param_name:
             shard_size = param.shape[0]
@@ -116,3 +99,12 @@ def load_tensor_parallel_weights(param, loaded_weight, param_name,
             break
     assert param.shape == loaded_weight.shape
     param.data.copy_(loaded_weight)
+
+
+def initialize_dummy_weights(
+    model: torch.nn.Module,
+    low: float = -1e-3,
+    high: float = 1e-3,
+) -> None:
+    for param in model.state_dict().values():
+        param.data.uniform_(low, high)
diff --git a/cacheflow/models/__init__.py b/cacheflow/models/__init__.py
deleted file mode 100644
index 511a6822..00000000
--- a/cacheflow/models/__init__.py
+++ /dev/null
@@ -1,10 +0,0 @@
-from cacheflow.models.input_metadata import InputMetadata
-from cacheflow.models.model_utils import get_memory_analyzer
-from cacheflow.models.model_utils import get_model
-
-
-__all__ = [
-    'InputMetadata',
-    'get_memory_analyzer',
-    'get_model',
-]
diff --git a/cacheflow/parallel_utils/__init__.py b/cacheflow/parallel_utils/__init__.py
deleted file mode 100644
index 78a7c446..00000000
--- a/cacheflow/parallel_utils/__init__.py
+++ /dev/null
@@ -1,12 +0,0 @@
-import cacheflow.parallel_utils.parallel_state
-import cacheflow.parallel_utils.tensor_parallel
-import cacheflow.parallel_utils.utils
-
-# Alias parallel_state as mpu, its legacy name
-mpu = parallel_state
-
-__all__ = [
-    "parallel_state",
-    "tensor_parallel",
-    "utils",
-]
diff --git a/cacheflow/utils.py b/cacheflow/utils.py
index 725a4d19..e586707c 100644
--- a/cacheflow/utils.py
+++ b/cacheflow/utils.py
@@ -1,13 +1,8 @@
 import enum
-import random
+
 import psutil
-
-import numpy as np
 import torch
 
-from cacheflow.parallel_utils.parallel_state import model_parallel_is_initialized
-from cacheflow.parallel_utils.tensor_parallel import model_parallel_cuda_manual_seed
-
 
 class Device(enum.Enum):
     GPU = enum.auto()
@@ -28,17 +23,6 @@ class Counter:
         self.counter = 0
 
 
-def set_random_seed(seed: int):
-    random.seed(seed)
-    np.random.seed(seed)
-    torch.manual_seed(seed)
-    if torch.cuda.is_available():
-        torch.cuda.manual_seed_all(seed)
-
-    if model_parallel_is_initialized():
-        model_parallel_cuda_manual_seed(seed)
-
-
 def get_gpu_memory(gpu: int = 0) -> int:
     return torch.cuda.get_device_properties(gpu).total_memory
 
diff --git a/cacheflow/worker/controller.py b/cacheflow/worker/controller.py
index e6b14820..46224727 100644
--- a/cacheflow/worker/controller.py
+++ b/cacheflow/worker/controller.py
@@ -5,7 +5,7 @@ try:
 except ImportError:
     ray = None
 
-from cacheflow.master.scheduler import Scheduler
+from cacheflow.core.scheduler import Scheduler
 from cacheflow.sequence import SequenceGroupInputs
 from cacheflow.worker.worker import Worker
 
diff --git a/cacheflow/worker/worker.py b/cacheflow/worker/worker.py
index 59001b9d..9f81f207 100644
--- a/cacheflow/worker/worker.py
+++ b/cacheflow/worker/worker.py
@@ -2,18 +2,15 @@ from typing import Dict, List, Tuple, Optional
 
 import torch
 
-from cacheflow.models import get_model
-from cacheflow.models import InputMetadata
+from cacheflow.model_executor import get_model, InputMetadata, set_random_seed
+from cacheflow.model_executor.parallel_utils.parallel_state import (
+    initialize_model_parallel,
+    initialize_all_reduce_launcher,
+    get_tensor_model_parallel_world_size)
 from cacheflow.sampling_params import SamplingParams
 from cacheflow.sequence import SequenceGroupInputs
 from cacheflow.sequence import SequenceOutputs
 from cacheflow.worker.cache_engine import CacheEngine
-from cacheflow.parallel_utils.parallel_state import (
-    initialize_model_parallel,
-    initialize_all_reduce_launcher,
-    get_tensor_model_parallel_world_size)
-from cacheflow.utils import set_random_seed
-
 
 class Worker:
 
diff --git a/cacheflow/http_frontend/gradio_webserver.py b/gradio_webserver.py
similarity index 100%
rename from cacheflow/http_frontend/gradio_webserver.py
rename to gradio_webserver.py
diff --git a/plot/plot_normalized_latency.py b/plot/plot_normalized_latency.py
deleted file mode 100644
index 4bccc40f..00000000
--- a/plot/plot_normalized_latency.py
+++ /dev/null
@@ -1,212 +0,0 @@
-import argparse
-import os
-import pickle
-from typing import Any, Dict, List, Optional, Tuple
-
-import matplotlib.pyplot as plt
-import numpy as np
-
-
-SYSTEMS = [
-    'orca-constant',
-    'orca-power2',
-    'orca-oracle',
-    'cacheflow',
-]
-
-SYSTEM_TO_LABEL = {
-    'orca-constant': 'Orca (Max)',
-    'orca-power2': 'Orca (Pow2)',
-    'orca-oracle': 'Orca (Oracle)',
-    'cacheflow': 'KVFlow',
-}
-
-SYSTEM_TO_COLOR = {
-    'orca-constant': 'red',
-    'orca-power2': 'orange',
-    'orca-oracle': 'green',
-    'cacheflow': 'blue',
-}
-
-SYSTEM_TO_MARKER = {
-    'orca-constant': 'x',
-    'orca-power2': '^',
-    'orca-oracle': 's',
-    'cacheflow': 'o',
-}
-
-
-def get_results(save_dir: str) -> List[Dict[str, Any]]:
-    with open(os.path.join(save_dir, 'sequences.pkl'), 'rb') as f:
-        results = pickle.load(f)
-    return results
-
-
-def get_request_rate(save_dir: str) -> float:
-    """Get request rate from save_dir name."""
-    # Directory name format:
-    # .../req-rate-{req_rate}/seed-{seed}/duration-{duration}
-    save_dir = os.path.abspath(save_dir)
-    dir_names = save_dir.split('/')
-
-    request_rate = None
-    for dir_name in dir_names:
-        if dir_name.startswith('req-rate-'):
-            if request_rate is not None:
-                raise ValueError(f'Found multiple request rates in {save_dir}')
-            request_rate = float(dir_name.split('-')[-1])
-    if request_rate is None:
-        raise ValueError(f'Cannot find request rate in {save_dir}')
-    return request_rate
-
-
-def get_model(save_dir: str) -> Tuple[str, int]:
-    save_dir = os.path.abspath(save_dir)
-    dir_names = save_dir.split('/')
-
-    model = None
-    for dir_name in dir_names:
-        if '-tp' in dir_name:
-            if model is not None:
-                raise ValueError(f'Found multiple models in {save_dir}')
-            model = dir_name.split('-tp')[0]
-            tp = int(dir_name.split('-tp')[-1])
-    if model is None:
-        raise ValueError(f'Cannot find model in {save_dir}')
-    return model, tp
-
-
-def get_system(save_dir: str) -> str:
-    save_dir = os.path.abspath(save_dir)
-    dir_names = save_dir.split('/')
-
-    for dir_name in dir_names:
-        if dir_name.startswith('orca-'):
-            return dir_name
-        if dir_name == 'cacheflow':
-            return dir_name
-    raise ValueError(f'Cannot find system in {save_dir}')
-
-
-def get_sampling(save_dir: str) -> str:
-    save_dir = os.path.abspath(save_dir)
-    dir_names = save_dir.split('/')
-
-    for dir_name in dir_names:
-        if dir_name.startswith('n'):
-            if dir_name.endswith('-beam'):
-                return dir_name
-            if dir_name[1:].isdigit():
-                return dir_name
-    raise ValueError(f'Cannot find sampling method in {save_dir}')
-
-
-def plot_normalized_latency(
-    exp_dir: str,
-    duration: int,
-    seed: int,
-    warmup: int,
-    xlim: Optional[float],
-    ylim: Optional[float],
-    log_scale: bool,
-    format: str,
-) -> None:
-    # Get leaf directories.
-    save_dirs = []
-    for root, dirs, files in os.walk(exp_dir):
-        if dirs:
-            continue
-        if 'sequences.pkl' not in files:
-            continue
-        if f'seed{seed}' not in root:
-            continue
-        if f'duration-{duration}' not in root:
-            continue
-        save_dirs.append(root)
-
-    # Plot normalized latency.
-    perf_per_system: Dict[str, Tuple[List[float], List[float]]] = {}
-    for save_dir in save_dirs:
-        per_seq_norm_latencies = []
-        results = get_results(save_dir)
-        for seq in results:
-            arrival_time = seq['arrival_time']
-            finish_time = seq['finish_time']
-            output_len = seq['output_len']
-            if arrival_time < warmup:
-                continue
-            latency = finish_time - arrival_time
-            norm_latency = latency / output_len
-            per_seq_norm_latencies.append(norm_latency)
-
-        request_rate = get_request_rate(save_dir)
-        normalized_latency = np.mean(per_seq_norm_latencies)
-        system_name = get_system(save_dir)
-        if system_name not in perf_per_system:
-            perf_per_system[system_name] = ([], [])
-        perf_per_system[system_name][0].append(request_rate)
-        perf_per_system[system_name][1].append(normalized_latency)
-
-        print('#seqs', len(per_seq_norm_latencies))
-        print(f'{save_dir}: {normalized_latency:.3f} s')
-
-
-    # Plot normalized latency.
-    plt.figure(figsize=(6, 4))
-    for system_name in reversed(SYSTEMS):
-        if system_name not in perf_per_system:
-            continue
-        # Sort by request rate.
-        request_rates, normalized_latencies = perf_per_system[system_name]
-        request_rates, normalized_latencies = zip(*sorted(zip(request_rates, normalized_latencies)))
-        label = SYSTEM_TO_LABEL[system_name]
-        color = SYSTEM_TO_COLOR[system_name]
-        marker = SYSTEM_TO_MARKER[system_name]
-        plt.plot(request_rates, normalized_latencies, label=label, color=color, marker=marker)
-
-    # plt.legend()
-    plt.xlabel('Request rate (req/s)', fontsize=12)
-    plt.ylabel('Normalized latency (s/token)', fontsize=12)
-
-    if log_scale:
-        plt.yscale('log')
-    if xlim is not None:
-        plt.xlim(left=0, right=xlim)
-    if ylim is not None:
-        if log_scale:
-            plt.ylim(top=ylim)
-        else:
-            plt.ylim(bottom=0, top=ylim)
-
-    handles, labels = plt.gca().get_legend_handles_labels()
-    handles = reversed(handles)
-    labels = reversed(labels)
-
-    plt.legend(
-        handles, labels,
-        ncol=4, fontsize=12, loc='upper center', bbox_to_anchor=(0.5, 1.15),
-        columnspacing=0.5, handletextpad=0.5, handlelength=1.5, frameon=False, borderpad=0)
-
-    # Save figure.
-    model, tp = get_model(exp_dir)
-    sampling = get_sampling(exp_dir)
-    figname = f'{model}-tp{tp}-{sampling}.{format}'
-    os.makedirs('./figures', exist_ok=True)
-    plt.savefig(os.path.join('figures', figname), bbox_inches='tight')
-    print(f'Saved figure to ./figures/{figname}')
-
-
-if __name__ == '__main__':
-    parser = argparse.ArgumentParser()
-    parser.add_argument('exp_dir', type=str)
-    parser.add_argument('--duration', type=int, required=True)
-    parser.add_argument('--seed', type=int, default=0)
-    parser.add_argument('--warmup', type=int, default=60)
-    parser.add_argument('--xlim', type=float, required=False, default=None)
-    parser.add_argument('--ylim', type=float, required=False, default=None)
-    parser.add_argument('--log', action='store_true')
-    parser.add_argument('--format', choices=['png', 'pdf'], default='png')
-    args = parser.parse_args()
-
-    plot_normalized_latency(
-        args.exp_dir, args.duration, args.seed, args.warmup, args.xlim, args.ylim, args.log, args.format)
diff --git a/plot/plot_stats.py b/plot/plot_stats.py
deleted file mode 100644
index c3915714..00000000
--- a/plot/plot_stats.py
+++ /dev/null
@@ -1,52 +0,0 @@
-import os
-import pickle
-
-import matplotlib.pyplot as plt
-
-STAT_NAMES = [
-    'input_lens',
-    'num_running',
-    'num_waiting',
-    'num_preemption',
-    'gpu_cache_usage',
-    'cpu_cache_usage',
-    'num_swapped',
-    'swap_in_lens',
-    'swap_out_lens',
-]
-
-
-def plot_stats(output_dir: str):
-    # Get stats.
-    with open(os.path.join(output_dir, 'stats.pkl'), 'rb') as f:
-        stats = pickle.load(f)
-    timestamps = stats['timestamps']
-
-    # Draw one figure for each stat.
-    num_stats = len(STAT_NAMES)
-    COLORS = ['b', 'g', 'r', 'c', 'm', 'y', 'k', 'orange', 'purple', 'pink', 'brown', 'gray']
-    fig, axs = plt.subplots(num_stats, 1, figsize=(10, 2 * num_stats))
-    for i, stat in enumerate(STAT_NAMES):
-        data = stats[stat]
-        if stat in ['gpu_cache_usage', 'cpu_cache_usage']:
-            data = [x * 100 for x in data]
-            stat = stat + ' (%)'
-        axs[i].plot(timestamps, data, color=COLORS[i % len(COLORS)])
-        axs[i].set_ylabel(stat.replace('_', ' '), fontdict={'fontsize': 12})
-        axs[i].set_ylim(bottom=0)
-
-    plt.xlabel('Time (s)')
-    plt.tight_layout()
-    fig_path = os.path.join(output_dir, 'stats.png')
-    plt.savefig(fig_path)
-    print(f'Saved stats to {fig_path}')
-
-
-if __name__ == '__main__':
-    import argparse
-
-    parser = argparse.ArgumentParser()
-    parser.add_argument('output_dir', type=str, help='Output directory.')
-    args = parser.parse_args()
-
-    plot_stats(args.output_dir)
diff --git a/simple_server.py b/simple_server.py
index 7b46f938..e0d17d90 100644
--- a/simple_server.py
+++ b/simple_server.py
@@ -1,6 +1,6 @@
 import argparse
 
-from cacheflow.master.server import (
+from cacheflow.core.server import (
     add_server_arguments, process_server_arguments,
     init_local_server_and_frontend_with_arguments)
 from cacheflow.sampling_params import SamplingParams
diff --git a/cacheflow/http_frontend/test_cli_client.py b/test_cli_client.py
similarity index 100%
rename from cacheflow/http_frontend/test_cli_client.py
rename to test_cli_client.py