[Core] Remove tokenizer group in vLLM (#24078)

Signed-off-by: Zhuohan Li <zhuohan123@gmail.com>

tests/v1/engine/test_output_processor.py

@@ -43,7 +43,7 @@ def _ref_convert_id_to_token(
     [RequestOutputKind.DELTA, RequestOutputKind.FINAL_ONLY])
 def test_incremental_detokenization(request_output_kind: RequestOutputKind,
                                     dummy_test_vectors):
-    output_processor = OutputProcessor(dummy_test_vectors.tokenizer_group,
+    output_processor = OutputProcessor(dummy_test_vectors.tokenizer,
                                        log_stats=False)
     engine_core = MockEngineCore(
         tokens_list=dummy_test_vectors.generation_tokens)
@@ -382,7 +382,7 @@ def test_logprobs_processor(request_output_kind: RequestOutputKind,
                             num_sample_logprobs: Optional[int],
                             num_prompt_logprobs: Optional[int],
                             dummy_test_vectors):
-    output_processor = OutputProcessor(dummy_test_vectors.tokenizer_group,
+    output_processor = OutputProcessor(dummy_test_vectors.tokenizer,
                                        log_stats=False)
     engine_core = MockEngineCore(
         tokens_list=dummy_test_vectors.generation_tokens,
@@ -535,7 +535,7 @@ def test_stop_token(include_stop_str_in_output: bool,
     )  # '<|end_of_text|>'
     stop_token_ids = [128009] if not is_eos_test else None  # '<|eot_id|>'
 
-    output_processor = OutputProcessor(dummy_test_vectors.tokenizer_group,
+    output_processor = OutputProcessor(dummy_test_vectors.tokenizer,
                                        log_stats=False)
     # Dummy engine core outputs, with control tokens suffixed to test stops
     suffix_token = ([eos_token_id] if is_eos_test else stop_token_ids)
@@ -642,7 +642,7 @@ def test_stop_token(include_stop_str_in_output: bool,
                          [None, NUM_SAMPLE_LOGPROBS_UNDER_TEST])
 def test_stop_string(include_stop_str_in_output: bool,
                      num_sample_logprobs: Optional[int], dummy_test_vectors):
-    output_processor = OutputProcessor(dummy_test_vectors.tokenizer_group,
+    output_processor = OutputProcessor(dummy_test_vectors.tokenizer,
                                        log_stats=False)
     engine_core = MockEngineCore(
         tokens_list=dummy_test_vectors.generation_tokens,
@@ -763,7 +763,7 @@ def test_stop_string(include_stop_str_in_output: bool,
 
 
 def test_iteration_stats(dummy_test_vectors):
-    output_processor = OutputProcessor(dummy_test_vectors.tokenizer_group,
+    output_processor = OutputProcessor(dummy_test_vectors.tokenizer,
                                        log_stats=True)
     engine_core = MockEngineCore(dummy_test_vectors.generation_tokens)
     engine_core_timestamp = time.monotonic()

tests/v1/engine/utils.py

@@ -9,7 +9,6 @@ import torch
 from transformers import PreTrainedTokenizer, PreTrainedTokenizerFast
 
 from vllm.engine.arg_utils import EngineArgs
-from vllm.transformers_utils.tokenizer_group import TokenizerGroup
 from vllm.v1.engine import EngineCoreOutput, FinishReason
 from vllm.v1.outputs import LogprobsLists, LogprobsTensors
 
@@ -39,7 +38,7 @@ def _create_random_top_logprob_test_vector(
     upper: float,
 ) -> torch.Tensor:
     """Create a random vector of top logprob float values.
-    
+
     Use to create fake sample logprobs for testing.
 
     Note that a real production scenario would require
@@ -63,7 +62,7 @@ def _create_random_top_logprob_test_matrix(
     upper: float,
 ) -> torch.Tensor:
     """Create a random matrix of top logprob float values.
-    
+
     Use to create fake prompt logprobs for testing.
 
     Note that a real production scenario would require
@@ -296,7 +295,6 @@ def generate_dummy_prompt_logprobs_tensors(
 class DummyOutputProcessorTestVectors:
     """Dummy test vectors for output processor tests"""
     tokenizer: GeneralTokenizerType
-    tokenizer_group: TokenizerGroup
     vllm_config: EngineArgs
     full_tokens: list[list[int]]  # Prompt + generated tokens
     prompt_tokens: list[list[int]]

tests/v1/entrypoints/llm/test_struct_output_generate.py

@@ -582,7 +582,7 @@ def test_structured_output_with_reasoning_matrices(
         reasoning_parser=reasoning_parser,
         speculative_config=speculative_config,
     )
-    tokenizer = llm.get_tokenizer(None)
+    tokenizer = llm.get_tokenizer()
     reasoner = ReasoningParserManager.get_reasoning_parser(reasoning_parser)(
         tokenizer=tokenizer)
 

vllm/engine/async_llm_engine.py

@@ -390,11 +390,8 @@ class _AsyncLLMEngine(LLMEngine):
         """Stop the remote worker execution loop."""
         await self.model_executor.stop_remote_worker_execution_loop_async()
 
-    async def get_tokenizer_async(self,
-                                  lora_request: Optional[LoRARequest] = None
-                                  ) -> AnyTokenizer:
-        return await (
-            self.get_tokenizer_group().get_lora_tokenizer_async(lora_request))
+    async def get_tokenizer_async(self) -> AnyTokenizer:
+        return self.get_tokenizer()
 
     async def add_request_async(
         self,
@@ -435,7 +432,6 @@ class _AsyncLLMEngine(LLMEngine):
 
         processed_inputs = await self.input_preprocessor.preprocess_async(
             prompt,
-            lora_request=lora_request,
             tokenization_kwargs=tokenization_kwargs,
         )
 
@@ -614,11 +610,8 @@ class AsyncLLMEngine(EngineClient):
     async def get_input_preprocessor(self) -> InputPreprocessor:
         return self.engine.input_preprocessor
 
-    async def get_tokenizer(
-        self,
-        lora_request: Optional[LoRARequest] = None,
-    ) -> AnyTokenizer:
-        return await self.engine.get_tokenizer_async(lora_request)
+    async def get_tokenizer(self) -> AnyTokenizer:
+        return self.engine.get_tokenizer()
 
     def start_background_loop(self) -> None:
         """Start the background loop."""

vllm/engine/llm_engine.py

@@ -49,9 +49,8 @@ from vllm.sequence import (ExecuteModelRequest, ParallelSampleSequenceGroup,
 from vllm.tracing import (SpanAttributes, SpanKind, extract_trace_context,
                           init_tracer)
 from vllm.transformers_utils.detokenizer import Detokenizer
-from vllm.transformers_utils.tokenizer import AnyTokenizer
-from vllm.transformers_utils.tokenizer_group import (
-    TokenizerGroup, init_tokenizer_from_configs)
+from vllm.transformers_utils.tokenizer import (AnyTokenizer,
+                                               init_tokenizer_from_configs)
 from vllm.usage.usage_lib import (UsageContext, is_usage_stats_enabled,
                                   usage_message)
 from vllm.utils import Counter, Device, resolve_obj_by_qualname, weak_bind
@@ -186,7 +185,7 @@ class LLMEngine:
 
         return outputs_
 
-    tokenizer: Optional[TokenizerGroup]
+    tokenizer: Optional[AnyTokenizer]
 
     def __init__(
         self,
@@ -233,18 +232,9 @@ class LLMEngine:
         if self.model_config.skip_tokenizer_init:
             self.tokenizer = None
             self.detokenizer = None
-            tokenizer_group = None
         else:
             self.tokenizer = self._init_tokenizer()
             self.detokenizer = Detokenizer(self.tokenizer)
-            tokenizer_group = self.get_tokenizer_group()
-
-        # Ensure that the function doesn't contain a reference to self,
-        # to avoid engine GC issues
-        def get_tokenizer_for_seq(sequence: Sequence) -> AnyTokenizer:
-            assert tokenizer_group, ("tokenizer_group cannot be None, "
-                                     "make sure skip_tokenizer_init is False")
-            return tokenizer_group.get_lora_tokenizer(sequence.lora_request)
 
         self.seq_counter = Counter()
         self.generation_config_fields = (
@@ -389,10 +379,8 @@ class LLMEngine:
                 self.detokenizer,
                 self.scheduler,
                 self.seq_counter,
-                get_tokenizer_for_seq,
                 stop_checker=StopChecker(
                     self.scheduler_config.max_model_len,
-                    get_tokenizer_for_seq,
                     self.reasoner if self.decoding_config.reasoning_backend
                     and self.tokenizer else None,
                 ),
@@ -521,24 +509,15 @@ class LLMEngine:
         if model_executor := getattr(self, "model_executor", None):
             model_executor.shutdown()
 
-    def get_tokenizer_group(self) -> TokenizerGroup:
+    def get_tokenizer(self) -> AnyTokenizer:
         if self.tokenizer is None:
             raise ValueError("Unable to get tokenizer because "
                              "skip_tokenizer_init is True")
 
         return self.tokenizer
 
-    def get_tokenizer(
-        self,
-        lora_request: Optional[LoRARequest] = None,
-    ) -> AnyTokenizer:
-        return self.get_tokenizer_group().get_lora_tokenizer(lora_request)
-
-    def _init_tokenizer(self) -> TokenizerGroup:
-        return init_tokenizer_from_configs(
-            model_config=self.model_config,
-            scheduler_config=self.scheduler_config,
-            lora_config=self.lora_config)
+    def _init_tokenizer(self) -> AnyTokenizer:
+        return init_tokenizer_from_configs(model_config=self.model_config)
 
     def _verify_args(self) -> None:
         self.model_config.verify_with_parallel_config(self.parallel_config)
@@ -574,11 +553,11 @@ class LLMEngine:
             )
             return None
 
-        self._validate_model_inputs(processed_inputs, lora_request)
+        self._validate_model_inputs(processed_inputs)
         # Create the sequences.
         block_size = self.cache_config.block_size
         seq_id = next(self.seq_counter)
-        eos_token_id = self.input_preprocessor.get_eos_token_id(lora_request)
+        eos_token_id = self.input_preprocessor.get_eos_token_id()
 
         encoder_inputs, decoder_inputs = split_enc_dec_inputs(processed_inputs)
 
@@ -700,7 +679,6 @@ class LLMEngine:
         processed_inputs = self.input_preprocessor.preprocess(
             prompt,
             tokenization_kwargs=tokenization_kwargs,
-            lora_request=lora_request,
         )
 
         self._add_processed_request(
@@ -1739,29 +1717,22 @@ class LLMEngine:
                     SpanAttributes.GEN_AI_LATENCY_TIME_IN_MODEL_EXECUTE,
                     metrics.model_execute_time)
 
-    def _validate_model_inputs(self, inputs: ProcessorInputs,
-                               lora_request: Optional[LoRARequest]):
+    def _validate_model_inputs(self, inputs: ProcessorInputs):
         encoder_inputs, decoder_inputs = split_enc_dec_inputs(inputs)
 
         if encoder_inputs is not None:
-            self._validate_model_input(encoder_inputs,
-                                       lora_request,
-                                       prompt_type="encoder")
+            self._validate_model_input(encoder_inputs, prompt_type="encoder")
 
-        self._validate_model_input(decoder_inputs,
-                                   lora_request,
-                                   prompt_type="decoder")
+        self._validate_model_input(decoder_inputs, prompt_type="decoder")
 
     def _validate_model_input(
         self,
         prompt_inputs: SingletonInputs,
-        lora_request: Optional[LoRARequest],
         *,
         prompt_type: Literal["encoder", "decoder"],
     ):
         model_config = self.model_config
-        tokenizer = (None if self.tokenizer is None else
-                     self.tokenizer.get_lora_tokenizer(lora_request))
+        tokenizer = self.tokenizer
 
         prompt_ids = prompt_inputs.get("prompt_token_ids", [])
         if not prompt_ids:
@@ -1822,7 +1793,7 @@ class LLMEngine:
         logits_processors = []
 
         if (sampling_params.logit_bias or sampling_params.allowed_token_ids):
-            tokenizer = self.get_tokenizer(lora_request=lora_request)
+            tokenizer = self.get_tokenizer()
 
             processors = get_openai_logits_processors(
                 logit_bias=sampling_params.logit_bias,
@@ -1835,7 +1806,7 @@ class LLMEngine:
             sampling_params.allowed_token_ids = None
 
         if len(sampling_params.bad_words) > 0:
-            tokenizer = self.get_tokenizer(lora_request)
+            tokenizer = self.get_tokenizer()
             processors = get_bad_words_logits_processors(
                 bad_words=sampling_params.bad_words, tokenizer=tokenizer)
             logits_processors.extend(processors)

vllm/engine/output_processor/interfaces.py

@@ -2,14 +2,13 @@
 # SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 
 from abc import ABC, abstractmethod
-from typing import Callable, List
+from typing import List
 
 from vllm.config import SchedulerConfig
 from vllm.core.scheduler import Scheduler
 from vllm.engine.output_processor.stop_checker import StopChecker
-from vllm.sequence import Sequence, SequenceGroup, SequenceGroupOutput
+from vllm.sequence import SequenceGroup, SequenceGroupOutput
 from vllm.transformers_utils.detokenizer import Detokenizer
-from vllm.transformers_utils.tokenizer import AnyTokenizer
 from vllm.utils import Counter
 
 
@@ -31,7 +30,6 @@ class SequenceGroupOutputProcessor(ABC):
         detokenizer: Detokenizer,
         scheduler: List[Scheduler],
         seq_counter: Counter,
-        get_tokenizer_for_seq: Callable[[Sequence], AnyTokenizer],
         stop_checker: "StopChecker",
     ):
         """Create an output processor.

vllm/engine/output_processor/stop_checker.py

 # SPDX-License-Identifier: Apache-2.0
 # SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 
-from typing import Callable, List, Optional, Tuple
+from typing import List, Optional, Tuple
 
 from vllm.lora.request import LoRARequest
 from vllm.reasoning import ReasoningParser
 from vllm.sampling_params import SamplingParams
 from vllm.sequence import Sequence, SequenceStatus
-from vllm.transformers_utils.tokenizer import AnyTokenizer
 
 
 class StopChecker:
@@ -20,12 +19,10 @@ class StopChecker:
     def __init__(
         self,
         max_model_len: int,
-        get_tokenizer_for_seq: Callable[[Sequence], AnyTokenizer],
         reasoner: Optional[ReasoningParser] = None,
     ):
         # Do not use it directly, but use `self._get_max_model_len`.
         self._max_model_len = max_model_len
-        self.get_tokenizer_for_seq = get_tokenizer_for_seq
         self.reasoner = reasoner
 
     def _get_max_model_len(self, lora_req: Optional[LoRARequest]):

vllm/engine/protocol.py

@@ -76,8 +76,7 @@ class EngineClient(ABC):
         include_stop_str_in_output = params.include_stop_str_in_output
 
         preprocessor = await self.get_input_preprocessor()
-        tokenizer_group = preprocessor.get_tokenizer_group()
-        tokenizer = await tokenizer_group.get_lora_tokenizer_async()
+        tokenizer = preprocessor.get_tokenizer()
         eos_token_id = tokenizer.eos_token_id
 
         if is_explicit_encoder_decoder_prompt(prompt):
@@ -260,11 +259,8 @@ class EngineClient(ABC):
         ...
 
     @abstractmethod
-    async def get_tokenizer(
-        self,
-        lora_request: Optional[LoRARequest] = None,
-    ) -> AnyTokenizer:
-        """Get the appropriate tokenizer for the request"""
+    async def get_tokenizer(self) -> AnyTokenizer:
+        """Get the tokenizer"""
         ...
 
     async def get_io_processor(self) -> IOProcessor:

vllm/entrypoints/llm.py

@@ -301,23 +301,17 @@ class LLM:
         self.io_processor = get_io_processor(self.llm_engine.vllm_config,
                                              io_processor_plugin)
 
-    def get_tokenizer(
-        self,
-        lora_request: Optional[LoRARequest] = None,
-    ) -> AnyTokenizer:
-        return self.llm_engine.get_tokenizer_group().get_lora_tokenizer(
-            lora_request)
+    def get_tokenizer(self) -> AnyTokenizer:
+        return self.llm_engine.get_tokenizer()
 
     def set_tokenizer(self, tokenizer: AnyTokenizer) -> None:
-        tokenizer_group = self.llm_engine.get_tokenizer_group()
-
         # While CachedTokenizer is dynamic, have no choice but
         # compare class name. Misjudgment will arise from
         # user-defined tokenizer started with 'Cached'
         if tokenizer.__class__.__name__.startswith("Cached"):
-            tokenizer_group.tokenizer = tokenizer
+            self.llm_engine.tokenizer = tokenizer
         else:
-            tokenizer_group.tokenizer = get_cached_tokenizer(tokenizer)
+            self.llm_engine.tokenizer = get_cached_tokenizer(tokenizer)
 
     def get_default_sampling_params(self) -> SamplingParams:
         if self.default_sampling_params is None:
@@ -707,7 +701,6 @@ class LLM:
         self,
         messages: Union[list[ChatCompletionMessageParam],
                         list[list[ChatCompletionMessageParam]]],
-        lora_request: Optional[LoRARequest] = None,
         chat_template: Optional[str] = None,
         chat_template_content_format: ChatTemplateContentFormatOption = "auto",
         add_generation_prompt: bool = True,
@@ -739,7 +732,7 @@ class LLM:
                 cast(list[ChatCompletionMessageParam], messages)
             ]
 
-        tokenizer = self.get_tokenizer(lora_request)
+        tokenizer = self.get_tokenizer()
         model_config = self.llm_engine.get_model_config()
         resolved_content_format = resolve_chat_template_content_format(
             chat_template,
@@ -872,7 +865,6 @@ class LLM:
 
         prompts = self.preprocess_chat(
             messages=messages,
-            lora_request=lora_request,
             chat_template=chat_template,
             chat_template_content_format=chat_template_content_format,
             add_generation_prompt=add_generation_prompt,
@@ -1519,7 +1511,7 @@ class LLM:
     ):
         """
         Validate that if any multi-modal data is skipped (i.e. None),
-        then its corresponding UUID must be set. 
+        then its corresponding UUID must be set.
         """
         if multi_modal_data is None:
             return

vllm/entrypoints/openai/serving_chat.py

@@ -188,7 +188,7 @@ class OpenAIServingChat(OpenAIServing):
 
             model_name = self.models.model_name(lora_request)
 
-            tokenizer = await self.engine_client.get_tokenizer(lora_request)
+            tokenizer = await self.engine_client.get_tokenizer()
 
             tool_parser = self.tool_parser
 

vllm/entrypoints/openai/serving_classification.py

@@ -50,10 +50,7 @@ class ClassificationMixin(OpenAIServing):
             return None
 
         try:
-            ctx.lora_request = self._maybe_get_adapters(ctx.request)
-
-            ctx.tokenizer = await self.engine_client.get_tokenizer(
-                ctx.lora_request)
+            ctx.tokenizer = await self.engine_client.get_tokenizer()
 
             renderer = self._get_renderer(ctx.tokenizer)
             ctx.engine_prompts = await renderer.render_prompt(

vllm/entrypoints/openai/serving_completion.py

@@ -127,8 +127,7 @@ class OpenAIServingCompletion(OpenAIServing):
             if self.model_config.skip_tokenizer_init:
                 tokenizer = None
             else:
-                tokenizer = await self.engine_client.get_tokenizer(lora_request
-                                                                   )
+                tokenizer = await self.engine_client.get_tokenizer()
             renderer = self._get_renderer(tokenizer)
 
             engine_prompts = await renderer.render_prompt_and_embeds(

vllm/entrypoints/openai/serving_embedding.py

@@ -76,8 +76,7 @@ class EmbeddingMixin(OpenAIServing):
         try:
             ctx.lora_request = self._maybe_get_adapters(ctx.request)
 
-            tokenizer = await self.engine_client.get_tokenizer(ctx.lora_request
-                                                               )
+            tokenizer = await self.engine_client.get_tokenizer()
             renderer = self._get_renderer(tokenizer)
 
             if isinstance(ctx.request, EmbeddingChatRequest):
@@ -394,8 +393,8 @@ class EmbeddingMixin(OpenAIServing):
     ) -> Optional[ErrorResponse]:
         """Collect and aggregate batch results
         with support for chunked processing.
-        
-        For chunked requests, performs online aggregation to 
+
+        For chunked requests, performs online aggregation to
         minimize memory usage.
         For regular requests, collects results normally.
         """

vllm/entrypoints/openai/serving_pooling.py

@@ -103,8 +103,7 @@ class OpenAIServingPooling(OpenAIServing):
             if self.model_config.skip_tokenizer_init:
                 tokenizer = None
             else:
-                tokenizer = await self.engine_client.get_tokenizer(lora_request
-                                                                   )
+                tokenizer = await self.engine_client.get_tokenizer()
             renderer = self._get_renderer(tokenizer)
 
             if getattr(request, "dimensions", None) is not None:

vllm/entrypoints/openai/serving_responses.py

@@ -240,7 +240,7 @@ class OpenAIServingResponses(OpenAIServing):
         try:
             lora_request = self._maybe_get_adapters(request)
             model_name = self.models.model_name(lora_request)
-            tokenizer = await self.engine_client.get_tokenizer(lora_request)
+            tokenizer = await self.engine_client.get_tokenizer()
 
             if self.use_harmony:
                 messages, request_prompts, engine_prompts = (

vllm/entrypoints/openai/serving_score.py

@@ -269,7 +269,7 @@ class ServingScores(OpenAIServing):
     ) -> Union[list[PoolingRequestOutput], ErrorResponse]:
         lora_request = self._maybe_get_adapters(request)
 
-        tokenizer = await self.engine_client.get_tokenizer(lora_request)
+        tokenizer = await self.engine_client.get_tokenizer()
 
         truncate_prompt_tokens = getattr(request, "truncate_prompt_tokens",
                                          None)

vllm/entrypoints/openai/serving_tokenization.py

@@ -65,7 +65,7 @@ class OpenAIServingTokenization(OpenAIServing):
         try:
             lora_request = self._maybe_get_adapters(request)
 
-            tokenizer = await self.engine_client.get_tokenizer(lora_request)
+            tokenizer = await self.engine_client.get_tokenizer()
             renderer = self._get_renderer(tokenizer)
 
             if isinstance(request, TokenizeChatRequest):
@@ -130,7 +130,7 @@ class OpenAIServingTokenization(OpenAIServing):
 
         lora_request = self._maybe_get_adapters(request)
 
-        tokenizer = await self.engine_client.get_tokenizer(lora_request)
+        tokenizer = await self.engine_client.get_tokenizer()
 
         self._log_inputs(request_id,
                          request.tokens,

vllm/inputs/preprocess.py

@@ -9,13 +9,11 @@ from typing_extensions import assert_never
 
 from vllm.config import ModelConfig
 from vllm.logger import init_logger
-from vllm.lora.request import LoRARequest
 from vllm.multimodal import MULTIMODAL_REGISTRY, MultiModalRegistry
 from vllm.multimodal.cache import BaseMultiModalProcessorCache
 from vllm.multimodal.inputs import (MultiModalDataDict, MultiModalEncDecInputs,
                                     MultiModalInputs, MultiModalUUIDDict)
 from vllm.transformers_utils.tokenizer import AnyTokenizer
-from vllm.transformers_utils.tokenizer_group import TokenizerGroup
 
 from .data import (DecoderOnlyInputs, EmbedsInputs, EmbedsPrompt,
                    EncoderDecoderInputs, ProcessorInputs, PromptType,
@@ -31,7 +29,7 @@ class InputPreprocessor:
     def __init__(
         self,
         model_config: ModelConfig,
-        tokenizer: Optional[TokenizerGroup],
+        tokenizer: Optional[AnyTokenizer],
         mm_registry: MultiModalRegistry = MULTIMODAL_REGISTRY,
         mm_processor_cache: Optional[BaseMultiModalProcessorCache] = None,
     ) -> None:
@@ -42,32 +40,28 @@ class InputPreprocessor:
         self.mm_registry = mm_registry
         self.mm_processor_cache = mm_processor_cache
 
-    def get_tokenizer_group(self) -> TokenizerGroup:
+    def get_tokenizer(self) -> AnyTokenizer:
         if self.tokenizer is None:
             raise ValueError("You cannot pass text prompts when "
                              "`skip_tokenizer_init` is True")
 
         return self.tokenizer
 
-    def get_bos_token_id(self,
-                         lora_request: Optional[LoRARequest] = None
-                         ) -> Optional[int]:
+    def get_bos_token_id(self) -> Optional[int]:
         if self.tokenizer is None:
             logger.warning("Using None for BOS token id because tokenizer "
                            "is not initialized")
             return None
 
-        return self.tokenizer.get_lora_tokenizer(lora_request).bos_token_id
+        return self.tokenizer.bos_token_id
 
-    def get_eos_token_id(self,
-                         lora_request: Optional[LoRARequest] = None
-                         ) -> Optional[int]:
+    def get_eos_token_id(self) -> Optional[int]:
         if self.tokenizer is None:
             logger.warning("Using None for EOS token id because tokenizer "
                            "is not initialized")
             return None
 
-        return self.tokenizer.get_lora_tokenizer(lora_request).eos_token_id
+        return self.tokenizer.eos_token_id
 
     def get_decoder_start_token_id(self) -> Optional[int]:
         """
@@ -190,14 +184,13 @@ class InputPreprocessor:
     def _tokenize_prompt(
         self,
         prompt: str,
-        lora_request: Optional[LoRARequest],
         tokenization_kwargs: Optional[dict[str, Any]] = None,
     ) -> list[int]:
         """
         Apply the model's tokenizer to a text prompt, returning the
         corresponding token IDs.
         """
-        tokenizer = self.get_tokenizer_group()
+        tokenizer = self.get_tokenizer()
         tokenization_kwargs = self._get_tokenization_kw(tokenization_kwargs)
 
         encoder_config = self.model_config.encoder_config
@@ -205,50 +198,39 @@ class InputPreprocessor:
         if encoder_config and encoder_config.get("do_lower_case", False):
             prompt = prompt.lower()
 
-        return tokenizer.encode(prompt=prompt,
-                                lora_request=lora_request,
-                                **tokenization_kwargs)
+        return tokenizer.encode(prompt, **tokenization_kwargs)
 
     async def _tokenize_prompt_async(
         self,
         prompt: str,
-        lora_request: Optional[LoRARequest],
         tokenization_kwargs: Optional[dict[str, Any]] = None,
     ) -> list[int]:
         """
         Async version of
         [`_tokenize_prompt`][vllm.inputs.preprocess.InputPreprocessor._tokenize_prompt].
         """
-        tokenizer = self.get_tokenizer_group()
+        tokenizer = self.get_tokenizer()
         tokenization_kwargs = self._get_tokenization_kw(tokenization_kwargs)
 
-        return await tokenizer.encode_async(prompt=prompt,
-                                            lora_request=lora_request,
-                                            **tokenization_kwargs)
+        return tokenizer.encode(prompt, **tokenization_kwargs)
 
-    def _get_mm_tokenizer(
-        self,
-        lora_request: Optional[LoRARequest],
-    ) -> AnyTokenizer:
+    def _get_mm_tokenizer(self) -> AnyTokenizer:
         # PrithviGeoSpatialMAE needs to be initialized without a tokenizer
         # while using also multi-modal input
         if not self.tokenizer:
             return cast(AnyTokenizer, object())  # Dummy
 
-        tokenizer_group = self.get_tokenizer_group()
-        return tokenizer_group.get_lora_tokenizer(lora_request)
+        tokenizer = self.get_tokenizer()
+        return tokenizer
 
-    async def _get_mm_tokenizer_async(
-        self,
-        lora_request: Optional[LoRARequest],
-    ) -> AnyTokenizer:
+    async def _get_mm_tokenizer_async(self) -> AnyTokenizer:
         # PrithviGeoSpatialMAE needs to be initialized without a tokenizer
         # while using also multi-modal input
         if not self.tokenizer:
             return cast(AnyTokenizer, object())  # Dummy
 
-        tokenizer_group = self.get_tokenizer_group()
-        return await tokenizer_group.get_lora_tokenizer_async(lora_request)
+        tokenizer = self.get_tokenizer()
+        return tokenizer
 
     def _process_multimodal(
         self,
@@ -256,7 +238,6 @@ class InputPreprocessor:
         mm_data: MultiModalDataDict,
         mm_processor_kwargs: Optional[Mapping[str, object]],
         tokenization_kwargs: Optional[dict[str, Any]] = None,
-        lora_request: Optional[LoRARequest] = None,
         *,
         mm_uuids: Optional[MultiModalUUIDDict] = None,
     ) -> MultiModalInputs:
@@ -264,7 +245,7 @@ class InputPreprocessor:
         Apply the model's multi-modal processor to a multi-modal prompt,
         returning the corresponding token IDs and metadata.
         """
-        tokenizer = self._get_mm_tokenizer(lora_request)
+        tokenizer = self._get_mm_tokenizer()
 
         mm_processor = self.mm_registry.create_processor(
             self.model_config,
@@ -299,7 +280,6 @@ class InputPreprocessor:
         mm_data: MultiModalDataDict,
         mm_processor_kwargs: Optional[Mapping[str, object]],
         tokenization_kwargs: Optional[dict[str, Any]] = None,
-        lora_request: Optional[LoRARequest] = None,
         *,
         mm_uuids: Optional[MultiModalUUIDDict] = None,
     ) -> MultiModalInputs:
@@ -307,7 +287,7 @@ class InputPreprocessor:
         Async version of
         [`_process_multimodal`][vllm.inputs.preprocess.InputPreprocessor._process_multimodal].
         """
-        tokenizer = await self._get_mm_tokenizer_async(lora_request)
+        tokenizer = await self._get_mm_tokenizer_async()
 
         mm_processor = self.mm_registry.create_processor(
             self.model_config,
@@ -386,7 +366,6 @@ class InputPreprocessor:
         self,
         parsed_content: TokensPrompt,
         tokenization_kwargs: Optional[dict[str, Any]] = None,
-        lora_request: Optional[LoRARequest] = None,
         *,
         mm_uuids: Optional[MultiModalUUIDDict] = None,
     ) -> Union[TokenInputs, MultiModalInputs]:
@@ -400,7 +379,6 @@ class InputPreprocessor:
                 multi_modal_data,
                 parsed_content.get("mm_processor_kwargs"),
                 tokenization_kwargs=tokenization_kwargs,
-                lora_request=lora_request,
                 mm_uuids=mm_uuids,
             )
         else:
@@ -415,7 +393,6 @@ class InputPreprocessor:
         self,
         parsed_content: TokensPrompt,
         tokenization_kwargs: Optional[dict[str, Any]] = None,
-        lora_request: Optional[LoRARequest] = None,
         *,
         mm_uuids: Optional[MultiModalUUIDDict] = None,
     ) -> Union[TokenInputs, MultiModalInputs]:
@@ -429,7 +406,6 @@ class InputPreprocessor:
                 multi_modal_data,
                 parsed_content.get("mm_processor_kwargs"),
                 tokenization_kwargs=tokenization_kwargs,
-                lora_request=lora_request,
                 mm_uuids=mm_uuids,
             )
         else:
@@ -444,7 +420,6 @@ class InputPreprocessor:
         self,
         parsed_content: TextPrompt,
         tokenization_kwargs: Optional[dict[str, Any]] = None,
-        lora_request: Optional[LoRARequest] = None,
         *,
         mm_uuids: Optional[MultiModalUUIDDict] = None,
     ) -> Union[TokenInputs, MultiModalInputs]:
@@ -457,13 +432,11 @@ class InputPreprocessor:
                 multi_modal_data,
                 parsed_content.get("mm_processor_kwargs"),
                 tokenization_kwargs=tokenization_kwargs,
-                lora_request=lora_request,
                 mm_uuids=mm_uuids,
             )
         else:
             prompt_token_ids = self._tokenize_prompt(
                 prompt_text,
-                lora_request=lora_request,
                 tokenization_kwargs=tokenization_kwargs,
             )
             inputs = token_inputs(
@@ -480,7 +453,6 @@ class InputPreprocessor:
         self,
         parsed_content: TextPrompt,
         tokenization_kwargs: Optional[dict[str, Any]] = None,
-        lora_request: Optional[LoRARequest] = None,
         *,
         mm_uuids: Optional[MultiModalUUIDDict] = None,
     ) -> Union[TokenInputs, MultiModalInputs]:
@@ -493,13 +465,11 @@ class InputPreprocessor:
                 multi_modal_data,
                 parsed_content.get("mm_processor_kwargs"),
                 tokenization_kwargs=tokenization_kwargs,
-                lora_request=lora_request,
                 mm_uuids=mm_uuids,
             )
         else:
             prompt_token_ids = await self._tokenize_prompt_async(
                 prompt_text,
-                lora_request=lora_request,
                 tokenization_kwargs=tokenization_kwargs,
             )
             inputs = token_inputs(
@@ -516,7 +486,6 @@ class InputPreprocessor:
         self,
         prompt: SingletonPrompt,
         tokenization_kwargs: Optional[dict[str, Any]] = None,
-        lora_request: Optional[LoRARequest] = None,
         *,
         mm_uuids: Optional[MultiModalUUIDDict] = None,
     ) -> SingletonInputs:
@@ -526,7 +495,6 @@ class InputPreprocessor:
         Arguments:
 
         * prompt: single encoder or decoder input prompt
-        * lora_request: this is only valid for decoder prompts
 
         Returns:
 
@@ -539,21 +507,18 @@ class InputPreprocessor:
         if parsed["type"] == "tokens":
             return self._process_tokens(
                 parsed["content"],
-                lora_request=lora_request,
                 mm_uuids=mm_uuids,
             )
         if parsed["type"] == "text":
             return self._process_text(
                 parsed["content"],
                 tokenization_kwargs=tokenization_kwargs,
-                lora_request=lora_request,
                 mm_uuids=mm_uuids,
             )
         if parsed["type"] == "str":
             return self._process_text(
                 TextPrompt(prompt=parsed["content"]),
                 tokenization_kwargs=tokenization_kwargs,
-                lora_request=lora_request,
                 mm_uuids=mm_uuids,
             )
 
@@ -563,7 +528,6 @@ class InputPreprocessor:
         self,
         prompt: SingletonPrompt,
         tokenization_kwargs: Optional[dict[str, Any]] = None,
-        lora_request: Optional[LoRARequest] = None,
         *,
         mm_uuids: Optional[MultiModalUUIDDict] = None,
     ) -> SingletonInputs:
@@ -578,21 +542,18 @@ class InputPreprocessor:
         if parsed["type"] == "tokens":
             return await self._process_tokens_async(
                 parsed["content"],
-                lora_request=lora_request,
                 mm_uuids=mm_uuids,
             )
         if parsed["type"] == "text":
             return await self._process_text_async(
                 parsed["content"],
                 tokenization_kwargs=tokenization_kwargs,
-                lora_request=lora_request,
                 mm_uuids=mm_uuids,
             )
         if parsed["type"] == "str":
             return await self._process_text_async(
                 TextPrompt(prompt=parsed["content"]),
                 tokenization_kwargs=tokenization_kwargs,
-                lora_request=lora_request,
                 mm_uuids=mm_uuids,
             )
 
@@ -844,7 +805,6 @@ class InputPreprocessor:
         self,
         prompt: SingletonPrompt,
         tokenization_kwargs: Optional[dict[str, Any]] = None,
-        lora_request: Optional[LoRARequest] = None,
         *,
         mm_uuids: Optional[MultiModalUUIDDict] = None,
     ) -> DecoderOnlyInputs:
@@ -856,7 +816,6 @@ class InputPreprocessor:
         Arguments:
 
         * prompt: input prompt
-        * lora_request
 
         Returns:
 
@@ -866,7 +825,6 @@ class InputPreprocessor:
         prompt_comps = self._prompt_to_llm_inputs(
             prompt,
             tokenization_kwargs=tokenization_kwargs,
-            lora_request=lora_request,
             mm_uuids=mm_uuids,
         )
 
@@ -876,7 +834,6 @@ class InputPreprocessor:
         self,
         prompt: SingletonPrompt,
         tokenization_kwargs: Optional[dict[str, Any]] = None,
-        lora_request: Optional[LoRARequest] = None,
         *,
         mm_uuids: Optional[MultiModalUUIDDict] = None,
     ) -> DecoderOnlyInputs:
@@ -887,7 +844,6 @@ class InputPreprocessor:
         prompt_comps = await self._prompt_to_llm_inputs_async(
             prompt,
             tokenization_kwargs=tokenization_kwargs,
-            lora_request=lora_request,
             mm_uuids=mm_uuids,
         )
 
@@ -897,7 +853,6 @@ class InputPreprocessor:
         self,
         prompt: PromptType,
         tokenization_kwargs: Optional[dict[str, Any]] = None,
-        lora_request: Optional[LoRARequest] = None,
         *,
         mm_uuids: Optional[MultiModalUUIDDict] = None,
     ) -> ProcessorInputs:
@@ -919,7 +874,6 @@ class InputPreprocessor:
         return self._process_decoder_only_prompt(
             prompt,
             tokenization_kwargs=tokenization_kwargs,
-            lora_request=lora_request,
             mm_uuids=mm_uuids,
         )
 
@@ -927,7 +881,6 @@ class InputPreprocessor:
         self,
         prompt: PromptType,
         tokenization_kwargs: Optional[dict[str, Any]] = None,
-        lora_request: Optional[LoRARequest] = None,
         *,
         mm_uuids: Optional[MultiModalUUIDDict] = None,
     ) -> ProcessorInputs:
@@ -952,7 +905,6 @@ class InputPreprocessor:
         return await self._process_decoder_only_prompt_async(
             prompt,
             tokenization_kwargs=tokenization_kwargs,
-            lora_request=lora_request,
             mm_uuids=mm_uuids,
         )
 

vllm/transformers_utils/detokenizer.py

@@ -10,18 +10,13 @@ from vllm.sequence import (VLLM_INVALID_TOKEN_ID, SamplingParams, Sequence,
 from .detokenizer_utils import (convert_prompt_ids_to_tokens,
                                 detokenize_incrementally)
 from .tokenizer import AnyTokenizer
-from .tokenizer_group import TokenizerGroup
 
 
 class Detokenizer:
     """Provides methods to decode the output of a model into text."""
 
-    def __init__(self, tokenizer_group: TokenizerGroup):
-        self.tokenizer_group = tokenizer_group
-
-    def get_tokenizer_for_seq(self, sequence: Sequence) -> AnyTokenizer:
-        """Returns the HF tokenizer to use for a given sequence."""
-        return self.tokenizer_group.get_lora_tokenizer(sequence.lora_request)
+    def __init__(self, tokenizer: AnyTokenizer):
+        self.tokenizer = tokenizer
 
     def decode_prompt_logprobs_inplace(self, seq_group: SequenceGroup,
                                        prompt_logprobs: list[Optional[dict[
@@ -32,9 +27,9 @@ class Detokenizer:
         Args:
             seq_group: The sequence group to decode.
             prompt_logprobs: The logprobs to decode.
-            position_offset: Offset of the first index of the logprobs 
+            position_offset: Offset of the first index of the logprobs
                 relative to the start of the sequence (for chunked prefill).
-        
+
         Returns:
             The prompt logprobs with the decoded tokens.
         """
@@ -46,7 +41,6 @@ class Detokenizer:
         # Only prompt, without the generated token.
         all_token_ids = seq.get_token_ids()
         prompt_token_ids = all_token_ids[:-1]
-        tokenizer = self.get_tokenizer_for_seq(seq)
         prefix_offset = 0
         read_offset = 0
         next_iter_prefix_offset = 0
@@ -70,7 +64,7 @@ class Detokenizer:
                         prompt_token_ids[:token_position] + [token_id])
                     (new_tokens, new_text, new_prefix_offset,
                      new_read_offset) = detokenize_incrementally(
-                         tokenizer=tokenizer,
+                         tokenizer=self.tokenizer,
                          all_input_ids=prompt_token_ids_with_token,
                          prev_tokens=prev_tokens,
                          prefix_offset=prefix_offset,
@@ -111,7 +105,6 @@ class Detokenizer:
         """
         all_input_ids = seq.get_token_ids()
         token_id_generated_this_iteration = all_input_ids[-1]
-        tokenizer = self.get_tokenizer_for_seq(seq)
 
         # Convert prompt token IDs to tokens if necessary.
         # Do it here so that we don't have to repeat this
@@ -119,14 +112,14 @@ class Detokenizer:
         if seq.tokens is None:
             (seq.tokens, seq.prefix_offset,
              seq.read_offset) = convert_prompt_ids_to_tokens(
-                 tokenizer=tokenizer,
+                 tokenizer=self.tokenizer,
                  prompt_ids=all_input_ids[:-1],
                  skip_special_tokens=prms.skip_special_tokens,
              )
 
         (new_tokens, new_decoded_token_text, prefix_offset,
          read_offset) = detokenize_incrementally(
-             tokenizer=tokenizer,
+             tokenizer=self.tokenizer,
              all_input_ids=all_input_ids,
              prev_tokens=seq.tokens,
              prefix_offset=seq.prefix_offset,
@@ -150,7 +143,7 @@ class Detokenizer:
                         and token_id != VLLM_INVALID_TOKEN_ID):
                     all_input_ids_with_logprob = previous_tokens + [token_id]
                     (_, new_text, _, _) = detokenize_incrementally(
-                        tokenizer=tokenizer,
+                        tokenizer=self.tokenizer,
                         all_input_ids=all_input_ids_with_logprob,
                         prev_tokens=seq.tokens,
                         prefix_offset=seq.prefix_offset,