[Inference]Update inference config and fix test (#5178)

* unify the config setting

* fix test

* fix import

* fix test

* fix

* fix

* add logger

* revise log info

---------

Co-authored-by: CjhHa1 <cjh18671720497outlook.com>

colossalai/inference/config.py

@@ -1,9 +1,14 @@
+import logging
 from dataclasses import dataclass
 from typing import Optional, Union
 
 import torch
 import torch.nn as nn
 
+GibiByte = 1024**3
+
+logger = logging.Logger(__name__)
+
 
 @dataclass
 class InferenceConfig:
@@ -18,7 +23,6 @@ class InferenceConfig:
         max_output_len: Maximum output length.
         max_input_len: Maximum input length.
         block_size: The number of blocks in a logical block.
-        gpu_utilization_rate: Maximum GPU memory usage ratio.
         dtype: The data type for weights and activations.
         tp_size: Tensor parallel size.
         pp_size: Pipeline parallel size.
@@ -27,13 +31,15 @@ class InferenceConfig:
         revision: The specific version(a branch, name, a commit id, or a tag name) of model to use.
         beam_width: The maximum beam width used to initialize KV Cache.
             During generation, the beam width provided as sampling parameter should be less than or equivalent to this value.
+        prefill_ratio: A controling ratio for prefill and decoding in running list, we will do a step of prefill
+            when the actual value exceeds this ratio.
     """
 
     model: Union[str, nn.Module]
     tokenizer: str = None
     tokenizer_mode: str = "auto"
     trust_remote_code: bool = False
-    max_batch_size: int = 8
+    max_batch_size: int = None
     max_output_len: int = 256
     max_input_len: int = 256
     block_size: int = 16
@@ -43,10 +49,34 @@ class InferenceConfig:
     max_seq_len: Optional[int] = None
     quant_mode: Optional[str] = None
     revision: Optional[str] = None
-    # TODO: beam search is not support for now
     beam_width: int = 1
+    # TODO: beam search is not support for now
+    prefill_ratio: Optional[float] = 1.2
+    # the ratio of prefill sequences to decoding sequences, we do prefill step once the actual value exceeds ratio
+
+    def _init_batch_size(self):
+        """
+        MAX_BATCH_SIZE is set to acurately utilize the memory of gpu.
+        We take a simple method to determine it by GPU memory size, user can still set it manually.
+        """
+        if self.max_batch_size is not None:
+            # already set by user
+            return
+
+        device = torch.device("cuda")
+        total_mem = torch.cuda.get_device_properties(device).total_memory // GibiByte
+        self.max_batch_size = 8
+
+        if 40 < total_mem <= 60:
+            self.max_batch_size = 16
+        elif 60 < total_mem <= 80:
+            self.max_batch_size = 32
+        logger.info(
+            f"The maximum batch size is automatically set to {self.max_batch_size} as no value is provided by the user."
+        )
 
     def __post_init__(self):
+        self._init_batch_size()
         self._verify_args()
 
     def _verify_args(self):

colossalai/inference/core/engine.py

@@ -3,7 +3,7 @@ from typing import Optional
 
 from transformers import AutoConfig
 
-from .config import InferenceConfig
+from colossalai.inference.config import InferenceConfig
 
 
 class InferenceEngine:

colossalai/inference/kv_cache/kvcache_manager.py

@@ -3,7 +3,7 @@ from typing import List, Tuple
 import torch
 from transformers.configuration_utils import PretrainedConfig
 
-from colossalai.inference.core.config import InferenceConfig
+from colossalai.inference.config import InferenceConfig
 from colossalai.logging import get_dist_logger
 from colossalai.utils import get_current_device
 

colossalai/inference/readme.md

@@ -4,8 +4,7 @@ Colossal-Infer is a library for inference of LLMs and MLMs. It is built on top o
 
 ## Structures
 ### Overview
-https://n4fyd3ptax.feishu.cn/docx/MhlmdHsGkoeoslx9fqucPO17n9b?openbrd=1&doc_app_id=501&blockId=WCGBdWI9hobOEsxkW5uc8HM6n3b&blockType=whiteboard&blockToken=Cca3wKWk7hPnJxbkCX6cMxPQnqd#WCGBdWI9hobOEsxkW5uc8HM6n3b
-
+The main design will be released later on.
 ## Roadmap
 - [] design of structures
 - [] Core components

colossalai/inference/sequence.py

@@ -1,3 +0,0 @@
-"""
-The abstraction of request and sequence are defined here.
-"""

colossalai/inference/struct.py

@@ -2,6 +2,10 @@ import enum
 from dataclasses import dataclass
 from typing import Dict, List, Set
 
+"""
+The abstraction of request and sequence are defined here.
+"""
+
 
 class RequsetStatus(enum.Enum):
     """The status of Sentences"""
@@ -95,16 +99,16 @@ class Sequence:
 
 
 @dataclass
-class BatchHandler:
+class BatchInfo:
     """
     Information to be passed and used for a batch of sequences.
     """
 
     sequences_set: Set[Sequence]
-    block_table: Dict[int, int]
+    block_table: Dict[int, int] = None
 
     @classmethod
-    def init_batch(cls, seqs: List[Sequence]) -> "BatchHandler":
+    def init_batch(cls, seqs: List[Sequence]) -> "BatchInfo":
         """
         Initializes inference batches by input sentence list.
 
@@ -115,13 +119,13 @@ class BatchHandler:
         block_table = {}
         for seq in seqs:
             if seq in sequences_set:
-                print("The sequence is already in sequences_set.")
                 assert (
-                    seq.request_id in block_table
+                    seq.request_id in block_table.keys()
                 ), "The sequence has been added to sequences_set, but it has not been added to block_table."
                 continue
+
             assert (
-                seq.request_id not in block_table
+                seq.request_id not in block_table.keys()
             ), "The sequence has not been added to sequences_set, but it is already in block_table."
 
             sequences_set.add(seq)
@@ -143,9 +147,9 @@ class BatchHandler:
         """
         Remove completed sentences from a batch.
         """
-        for seq in self.sequences_set:
+        for seq in self.sequences_set.copy():
             if seq.check_finish():
-                self.sequences_set.reomve(seq)
+                self.sequences_set.remove(seq)
                 del self.block_table[seq.request_id]
 
     def add_seqs(self, seqs: List[Sequence]) -> None:

tests/test_infer/test_config_and_struct.py

@@ -1,9 +1,10 @@
-from colossalai.inference.core.config import InferenceConfig
-from colossalai.inference.core.inference_struct import BatchHandler, Sequence
+from colossalai.inference.config import InferenceConfig
+from colossalai.inference.struct import BatchInfo, RequsetStatus, Sequence
 
 
-def test_config_and_struct():
-    InferenceConfig("/llama")
+def test_config_and_inferenceData():
+    config = InferenceConfig("/llama")
+    assert config.max_batch_size
     sequence = Sequence(
         request_id=1,
         prompt="abc",
@@ -27,11 +28,16 @@ def test_config_and_struct():
     assert sequence.get_output_len() == 0
     assert sequence.check_finish() == False
 
-    batch = BatchHandler.init_batch([sequence])
+    batch = BatchInfo.init_batch([sequence])
+    assert batch.block_table[sequence.request_id] == sequence.block_table_index
+    sequence.status = RequsetStatus.COMPLETED
     batch.fliter_batch()
+    assert batch.block_table == {}
     batch.add_seqs([sequence2])
+    assert batch.block_table[sequence2.request_id] == sequence2.block_table_index
     batch.clear_batch()
+    assert batch.block_table == {}
 
 
 if __name__ == "__main__":
-    test_config_and_struct()
+    test_config_and_inferenceData()

tests/test_infer/test_kvcache_manager.py

@@ -3,7 +3,7 @@ import random
 import torch
 from transformers.models.llama import LlamaConfig
 
-from colossalai.inference.core.config import InferenceConfig
+from colossalai.inference.config import InferenceConfig
 from colossalai.inference.kv_cache import CacheBlock, KVCacheManager
 from colossalai.logging import disable_existing_loggers
 from colossalai.testing import parameterize