General implementations for core functionality

src/guidellm/backend/base.py

@@ -1,6 +1,6 @@
 from abc import ABC, abstractmethod
 from enum import Enum
-from typing import Iterator, List, Optional, Type
+from typing import Iterator, List, Optional, Type, Union
 from dataclasses import dataclass
 import uuid
 from loguru import logger
@@ -52,7 +52,7 @@ def inner_wrapper(wrapped_class: Type["Backend"]):
         return inner_wrapper
 
     @staticmethod
-    def create_backend(backend_type: BackendTypes, **kwargs) -> "Backend":
+    def create_backend(backend_type: Union[str, BackendTypes], **kwargs) -> "Backend":
         """
         Factory method to create a backend based on the backend type.
 

src/guidellm/backend/openai.py

@@ -1,6 +1,5 @@
 import openai
 from typing import Iterator, List, Optional, Dict, Any
-from urllib.parse import urlparse
 from transformers import AutoTokenizer
 from loguru import logger
 from guidellm.backend import Backend, BackendTypes, GenerativeResponse
@@ -24,8 +23,10 @@ class OpenAIBackend(Backend):
     :type path: Optional[str]
     :param model: The OpenAI model to use, defaults to the first available model.
     :type model: Optional[str]
-    :param model_args: Additional model arguments for the request.
-    :type model_args: Optional[Dict[str, Any]]
+    :param api_key: The OpenAI API key to use.
+    :type api_key: Optional[str]
+    :param request_args: Optional arguments for the OpenAI request.
+    :type request_args: Dict[str, Any]
     """
 
     def __init__(
@@ -35,21 +36,30 @@ def __init__(
         port: Optional[int] = None,
         path: Optional[str] = None,
         model: Optional[str] = None,
-        **model_args,
+        api_key: Optional[str] = None,
+        **request_args,
     ):
-        if target:
-            parsed_url = urlparse(target)
-            self.host = parsed_url.hostname
-            self.port = parsed_url.port
-            self.path = parsed_url.path
-        else:
-            self.host = host
-            self.port = port
-            self.path = path
+        self.target = target
         self.model = model
-        self.model_args = model_args
-        openai.api_key = model_args.get("api_key", None)
-        logger.info(f"Initialized OpenAIBackend with model: {self.model}")
+        self.request_args = request_args
+
+        if not self.target:
+            if not host:
+                raise ValueError("Host is required if target is not provided.")
+
+            port_incl = f":{port}" if port else ""
+            path_incl = path if path else ""
+            self.target = f"http://{host}{port_incl}{path_incl}"
+
+        openai.api_base = self.target
+        openai.api_key = api_key
+
+        if not model:
+            self.model = self.default_model()
+
+        logger.info(
+            f"Initialized OpenAIBackend with target: {self.target} and model: {self.model}"
+        )
 
     def make_request(self, request: BenchmarkRequest) -> Iterator[GenerativeResponse]:
         """
@@ -61,14 +71,20 @@ def make_request(self, request: BenchmarkRequest) -> Iterator[GenerativeResponse
         :rtype: Iterator[GenerativeResponse]
         """
         logger.debug(f"Making request to OpenAI backend with prompt: {request.prompt}")
+        num_gen_tokens = request.params.get("generated_tokens", None)
+        request_args = {
+            "n": 1,
+        }
+
+        if num_gen_tokens:
+            request_args["max_tokens"] = num_gen_tokens
+            request_args["stop"] = None
+
+        if self.request_args:
+            request_args.update(self.request_args)
+
         response = openai.Completion.create(
-            engine=self.model or self.default_model(),
-            prompt=request.prompt,
-            max_tokens=request.params.get("max_tokens", 100),
-            n=request.params.get("n", 1),
-            stop=request.params.get("stop", None),
-            stream=True,
-            **self.model_args,
+            engine=self.model, prompt=request.prompt, stream=True, **request_args,
         )
 
         for chunk in response:
@@ -80,8 +96,16 @@ def make_request(self, request: BenchmarkRequest) -> Iterator[GenerativeResponse
                         type_="final",
                         output=choice["text"],
                         prompt=request.prompt,
-                        prompt_token_count=self._token_count(request.prompt),
-                        output_token_count=self._token_count(choice["text"]),
+                        prompt_token_count=(
+                            request.token_count
+                            if request.token_count
+                            else self._token_count(request.prompt)
+                        ),
+                        output_token_count=(
+                            num_gen_tokens
+                            if num_gen_tokens
+                            else self._token_count(choice["text"])
+                        ),
                     )
                     break
                 else:
@@ -133,14 +157,6 @@ def model_tokenizer(self, model: str) -> Optional[Any]:
             return None
 
     def _token_count(self, text: str) -> int:
-        """
-        Count the number of tokens in a text.
-
-        :param text: The text to tokenize.
-        :type text: str
-        :return: The number of tokens.
-        :rtype: int
-        """
         token_count = len(text.split())
         logger.debug(f"Token count for text '{text}': {token_count}")
         return token_count

src/guidellm/core/request.py

@@ -1,4 +1,5 @@
 from typing import Dict, Any, Optional
+import uuid
 
 
 __all__ = ["BenchmarkRequest"]
@@ -10,11 +11,18 @@ class BenchmarkRequest:
 
     :param prompt: The input prompt for the benchmark request.
     :type prompt: str
+    :param token_count: The number of tokens to generate, defaults to None.
+    :type token_count: Optional[int]
     :param params: Optional parameters for the benchmark request, defaults to None.
     :type params: Optional[Dict[str, Any]]
     """
 
-    def __init__(self, prompt: str, params: Optional[Dict[str, Any]] = None):
+    def __init__(
+        self,
+        prompt: str,
+        token_count: Optional[int] = None,
+        params: Optional[Dict[str, Any]] = None,
+    ):
         """
         Initialize the BenchmarkRequest with a prompt and optional parameters.
 
@@ -23,9 +31,21 @@ def __init__(self, prompt: str, params: Optional[Dict[str, Any]] = None):
         :param params: Optional parameters for the benchmark request, defaults to None.
         :type params: Optional[Dict[str, Any]]
         """
+        self._id = str(uuid.uuid4())
         self._prompt = prompt
+        self._token_count = token_count
         self._params = params or {}
 
+    @property
+    def id(self) -> str:
+        """
+        Get the unique identifier for the benchmark request.
+
+        :return: The unique identifier.
+        :rtype: str
+        """
+        return self._id
+
     @property
     def prompt(self) -> str:
         """
@@ -36,6 +56,16 @@ def prompt(self) -> str:
         """
         return self._prompt
 
+    @property
+    def token_count(self) -> Optional[int]:
+        """
+        Get the number of tokens to generate for the benchmark request.
+
+        :return: The number of tokens to generate.
+        :rtype: Optional[int]
+        """
+        return self._token_count
+
     @property
     def params(self) -> Dict[str, Any]:
         """
@@ -53,7 +83,7 @@ def __str__(self) -> str:
         :return: String representation of the BenchmarkRequest.
         :rtype: str
         """
-        return f"BenchmarkRequest(prompt={self._prompt}, params={self._params})"
+        return f"BenchmarkRequest(id={self.id}, prompt={self._prompt}, params={self._params})"
 
     def __repr__(self) -> str:
         """
@@ -62,4 +92,4 @@ def __repr__(self) -> str:
         :return: Unambiguous string representation of the BenchmarkRequest.
         :rtype: str
         """
-        return f"BenchmarkRequest(prompt={self._prompt}, params={self._params})"
+        return f"BenchmarkRequest(id={self.id}, prompt={self._prompt}, params={self._params})"