Add an option to disable penalizer (#1651)

python/sglang/srt/managers/schedule_batch.py

@@ -531,7 +531,9 @@ class ScheduleBatch:
         self.extend_lens = [r.extend_input_len for r in reqs]
         self.extend_logprob_start_lens = [r.extend_logprob_start_len for r in reqs]
 
-        self.sampling_info = SamplingBatchInfo.from_schedule_batch(self, vocab_size)
+        self.sampling_info = SamplingBatchInfo.from_schedule_batch(
+            self, vocab_size, global_server_args_dict["disable_penalizer"]
+        )
 
     def mix_with_running(self, running_batch: "ScheduleBatch"):
         self.forward_mode = ForwardMode.MIXED

python/sglang/srt/managers/scheduler.py

@@ -671,6 +671,7 @@ class Scheduler:
     def process_batch_result_prefill(self, batch: ScheduleBatch, result):
         if self.is_generation:
             logits_output, next_token_ids = result
+            if batch.sampling_info.penalizer_orchestrator:
                 batch.sampling_info.penalizer_orchestrator.cumulate_output_tokens(
                     next_token_ids
                 )
@@ -755,6 +756,7 @@ class Scheduler:
 
     def process_batch_result_decode(self, batch: ScheduleBatch, result):
         logits_output, next_token_ids = result
+        if batch.sampling_info.penalizer_orchestrator:
             batch.sampling_info.penalizer_orchestrator.cumulate_output_tokens(
                 next_token_ids
             )

python/sglang/srt/model_executor/model_runner.py

@@ -119,6 +119,7 @@ class ModelRunner:
                 "triton_attention_reduce_in_fp32": server_args.triton_attention_reduce_in_fp32,
                 "disable_mla": server_args.disable_mla,
                 "torchao_config": server_args.torchao_config,
+                "disable_penalizer": server_args.disable_penalizer,
             }
         )
 

python/sglang/srt/sampling/sampling_batch_info.py

 from __future__ import annotations
 
 import dataclasses
-from typing import TYPE_CHECKING, List
+from typing import TYPE_CHECKING, List, Optional
 
 import torch
 
@@ -33,15 +33,20 @@ class SamplingBatchInfo:
     regex_fsm_states: List[int] = None
 
     # Penalizer
-    penalizer_orchestrator: penaltylib.BatchedPenalizerOrchestrator = None
-    linear_penalties: torch.Tensor = None
-    scaling_penalties: torch.Tensor = None
+    penalizer_orchestrator: Optional[penaltylib.BatchedPenalizerOrchestrator] = None
+    linear_penalties: Optional[torch.Tensor] = None
+    scaling_penalties: Optional[torch.Tensor] = None
 
     # Device
     device: str = "cuda"
 
     @classmethod
-    def from_schedule_batch(cls, batch: ScheduleBatch, vocab_size: int):
+    def from_schedule_batch(
+        cls,
+        batch: ScheduleBatch,
+        vocab_size: int,
+        disable_penalizer: bool,
+    ):
         reqs = batch.reqs
         with batch.input_ids.device:
             temperatures = torch.tensor(
@@ -76,6 +81,9 @@ class SamplingBatchInfo:
         # While we choose not to even create the class instances if they are not required, this
         # could add additional complexity to the {ScheduleBatch} class, especially we need to
         # handle {filter_batch()} and {merge()} cases as well.
+        if disable_penalizer:
+            ret.penalizer_orchestrator = None
+        else:
             ret.penalizer_orchestrator = penaltylib.BatchedPenalizerOrchestrator(
                 vocab_size=vocab_size,
                 batch=batch,
@@ -97,6 +105,9 @@ class SamplingBatchInfo:
         return len(self.temperatures)
 
     def update_penalties(self):
+        if not self.penalizer_orchestrator:
+            return
+
         self.scaling_penalties = None
         self.linear_penalties = None
 
@@ -117,11 +128,10 @@ class SamplingBatchInfo:
 
     def update_regex_vocab_mask(self):
         has_regex = self.regex_fsms and any(regex_fsm for regex_fsm in self.regex_fsms)
-
-        # Reset the vocab mask
+        if not has_regex:
             self.vocab_mask = None
+            return
 
-        if has_regex:
         self.vocab_mask = torch.zeros(
             len(self.temperatures),
             self.vocab_size,
@@ -136,6 +146,7 @@ class SamplingBatchInfo:
                 ] = 0
 
     def filter_batch(self, unfinished_indices: List[int], new_indices: torch.Tensor):
+        if self.penalizer_orchestrator:
             self.penalizer_orchestrator.filter(unfinished_indices, new_indices)
 
         for item in [
@@ -175,6 +186,7 @@ class SamplingBatchInfo:
         return None
 
     def merge_batch(self, other: "SamplingBatchInfo"):
+        if self.penalizer_orchestrator:
             self.penalizer_orchestrator.merge(other.penalizer_orchestrator)
 
         for item in [

python/sglang/srt/server_args.py

@@ -35,12 +35,12 @@ class ServerArgs:
     tokenizer_mode: str = "auto"
     skip_tokenizer_init: bool = False
     load_format: str = "auto"
+    trust_remote_code: bool = True
     dtype: str = "auto"
-    device: str = "cuda"
     kv_cache_dtype: str = "auto"
-    trust_remote_code: bool = True
-    context_length: Optional[int] = None
     quantization: Optional[str] = None
+    context_length: Optional[int] = None
+    device: str = "cuda"
     served_model_name: Optional[str] = None
     chat_template: Optional[str] = None
     is_embedding: bool = False
@@ -86,10 +86,15 @@ class ServerArgs:
     # Model override args in JSON
     json_model_override_args: str = "{}"
 
-    # Optimization/debug options
+    # LoRA
+    lora_paths: Optional[List[str]] = None
+    max_loras_per_batch: int = 8
+
+    # Kernel backend
     attention_backend: Optional[str] = None
     sampling_backend: Optional[str] = None
 
+    # Optimization/debug options
     disable_flashinfer: bool = False
     disable_flashinfer_sampling: bool = False
     disable_radix_cache: bool = False
@@ -99,6 +104,7 @@ class ServerArgs:
     disable_disk_cache: bool = False
     disable_custom_all_reduce: bool = False
     disable_mla: bool = False
+    disable_penalizer: bool = False
     enable_mixed_chunk: bool = False
     enable_torch_compile: bool = False
     max_torch_compile_bs: int = 32
@@ -106,10 +112,6 @@ class ServerArgs:
     enable_p2p_check: bool = False
     triton_attention_reduce_in_fp32: bool = False
 
-    # LoRA
-    lora_paths: Optional[List[str]] = None
-    max_loras_per_batch: int = 8
-
     def __post_init__(self):
         # Set missing default values
         if self.tokenizer_path is None:
@@ -224,6 +226,11 @@ class ServerArgs:
             '"dummy" will initialize the weights with random values, '
             "which is mainly for profiling.",
         )
+        parser.add_argument(
+            "--trust-remote-code",
+            action="store_true",
+            help="Whether or not to allow for custom models defined on the Hub in their own modeling files.",
+        )
         parser.add_argument(
             "--dtype",
             type=str,
@@ -238,13 +245,6 @@ class ServerArgs:
             '* "float" is shorthand for FP32 precision.\n'
             '* "float32" for FP32 precision.',
         )
-        parser.add_argument(
-            "--device",
-            type=str,
-            default="cuda",
-            choices=["cuda", "xpu"],
-            help="The device type.",
-        )
         parser.add_argument(
             "--kv-cache-dtype",
             type=str,
@@ -252,17 +252,6 @@ class ServerArgs:
             choices=["auto", "fp8_e5m2"],
             help='Data type for kv cache storage. "auto" will use model data type. "fp8_e5m2" is supported for CUDA 11.8+.',
         )
-        parser.add_argument(
-            "--trust-remote-code",
-            action="store_true",
-            help="Whether or not to allow for custom models defined on the Hub in their own modeling files.",
-        )
-        parser.add_argument(
-            "--context-length",
-            type=int,
-            default=ServerArgs.context_length,
-            help="The model's maximum context length. Defaults to None (will use the value from the model's config.json instead).",
-        )
         parser.add_argument(
             "--quantization",
             type=str,
@@ -278,6 +267,19 @@ class ServerArgs:
             ],
             help="The quantization method.",
         )
+        parser.add_argument(
+            "--context-length",
+            type=int,
+            default=ServerArgs.context_length,
+            help="The model's maximum context length. Defaults to None (will use the value from the model's config.json instead).",
+        )
+        parser.add_argument(
+            "--device",
+            type=str,
+            default="cuda",
+            choices=["cuda", "xpu"],
+            help="The device type.",
+        )
         parser.add_argument(
             "--served-model-name",
             type=str,
@@ -440,7 +442,23 @@ class ServerArgs:
             default=ServerArgs.json_model_override_args,
         )
 
-        # Optimization/debug options
+        # LoRA
+        parser.add_argument(
+            "--lora-paths",
+            type=str,
+            nargs="*",
+            default=None,
+            action=LoRAPathAction,
+            help="The list of LoRA adapters. You can provide a list of either path in str or renamed path in the format {name}={path}",
+        )
+        parser.add_argument(
+            "--max-loras-per-batch",
+            type=int,
+            default=8,
+            help="Maximum number of adapters for a running batch, include base-only request",
+        )
+
+        # Kernel backend
         parser.add_argument(
             "--attention-backend",
             type=str,
@@ -455,6 +473,8 @@ class ServerArgs:
             default=ServerArgs.sampling_backend,
             help="Choose the kernels for sampling layers.",
         )
+
+        # Optimization/debug options
         parser.add_argument(
             "--disable-flashinfer",
             action="store_true",
@@ -501,6 +521,11 @@ class ServerArgs:
             action="store_true",
             help="Disable Multi-head Latent Attention (MLA) for DeepSeek-V2.",
         )
+        parser.add_argument(
+            "--disable-penalizer",
+            action="store_true",
+            help="Disable the logit penalizer (e.g., frequency and repetition penalty).",
+        )
         parser.add_argument(
             "--enable-mixed-chunk",
             action="store_true",
@@ -534,27 +559,6 @@ class ServerArgs:
             help="Cast the intermidiate attention results to fp32 to avoid possible crashes related to fp16."
             "This only affects Triton attention kernels.",
         )
-        parser.add_argument(
-            "--efficient-weight-load",
-            action="store_true",
-            help="Turn on memory efficient weight loading with quantization (quantize per layer during loading).",
-        )
-
-        # LoRA options
-        parser.add_argument(
-            "--lora-paths",
-            type=str,
-            nargs="*",
-            default=None,
-            action=LoRAPathAction,
-            help="The list of LoRA adapters. You can provide a list of either path in str or renamed path in the format {name}={path}",
-        )
-        parser.add_argument(
-            "--max-loras-per-batch",
-            type=int,
-            default=8,
-            help="Maximum number of adapters for a running batch, include base-only request",
-        )
 
     @classmethod
     def from_cli_args(cls, args: argparse.Namespace):