350 lines
12 KiB
Python
350 lines
12 KiB
Python
# SPDX-FileCopyrightText: Copyright (c) 2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
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# SPDX-License-Identifier: Apache-2.0
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import logging
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import re
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from typing import Literal
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import yaml
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from benchmarks.profiler.utils.config import (
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Config,
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append_argument,
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break_arguments,
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get_service_name_by_type,
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get_worker_service_from_config,
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remove_valued_arguments,
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set_argument_value,
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setup_worker_service_resources,
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update_image,
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validate_and_get_worker_args,
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)
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from benchmarks.profiler.utils.defaults import (
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DEFAULT_MODEL_NAME,
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DYNAMO_RUN_DEFAULT_PORT,
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)
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from dynamo.planner.defaults import SubComponentType
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logger = logging.getLogger(__name__)
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logger.setLevel(logging.INFO)
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console_handler = logging.StreamHandler()
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console_handler.setLevel(logging.INFO)
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formatter = logging.Formatter(
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"%(asctime)s - %(name)s - %(levelname)s - %(message)s", "%Y-%m-%d %H:%M:%S"
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)
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console_handler.setFormatter(formatter)
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logger.addHandler(console_handler)
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DEFAULT_SGLANG_CONFIG_PATH = "examples/backends/sglang/deploy/disagg.yaml"
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class SGLangConfigModifier:
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@classmethod
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def load_default_config(cls) -> dict:
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with open(DEFAULT_SGLANG_CONFIG_PATH, "r") as f:
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return yaml.safe_load(f)
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@classmethod
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def update_model(cls, config, model_name: str) -> dict:
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# change the model to serve
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cfg = Config.model_validate(config)
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# Update model for both prefill and decode workers
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for sub_component_type in [SubComponentType.PREFILL, SubComponentType.DECODE]:
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try:
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worker_service = get_worker_service_from_config(
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cfg, backend="sglang", sub_component_type=sub_component_type
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)
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args = validate_and_get_worker_args(worker_service, backend="sglang")
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args = break_arguments(args)
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# Update both --model-path and --served-model-name
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args = set_argument_value(args, "--model-path", model_name)
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args = set_argument_value(args, "--served-model-name", model_name)
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worker_service.extraPodSpec.mainContainer.args = args
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except (ValueError, KeyError):
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# Service might not exist (e.g., in aggregated mode)
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logger.debug(
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f"Skipping {sub_component_type} service as it doesn't exist"
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)
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continue
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return cfg.model_dump()
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@classmethod
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def update_image(cls, config, image: str) -> dict:
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"""Update container image for all DGD services (frontend, planner, workers)."""
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return update_image(config, image)
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@classmethod
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def convert_config(
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cls,
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config: dict,
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target: Literal["prefill", "decode"],
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is_moe_model: bool = False,
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) -> dict:
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cfg = Config.model_validate(config)
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# set metadata name
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cfg.metadata.name = "sglang-agg"
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# disable planner
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if "Planner" in cfg.spec.services:
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del cfg.spec.services["Planner"]
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if target == "prefill":
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# Get service names by inferring from subComponentType first
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prefill_service_name = get_service_name_by_type(
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cfg, "sglang", SubComponentType.PREFILL
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)
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decode_service_name = get_service_name_by_type(
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cfg, "sglang", SubComponentType.DECODE
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)
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# convert prefill worker into decode worker
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cfg.spec.services[decode_service_name] = cfg.spec.services[
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prefill_service_name
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]
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del cfg.spec.services[prefill_service_name]
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# Set subComponentType for aggregated mode (using decode worker for prefill-only)
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cfg.spec.services[decode_service_name].subComponentType = "decode"
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worker_service = get_worker_service_from_config(
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cfg,
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backend="sglang",
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sub_component_type=SubComponentType.DECODE,
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)
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args = validate_and_get_worker_args(worker_service, backend="sglang")
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args = break_arguments(args)
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# remove disagg flags
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args = remove_valued_arguments(args, "--disaggregation-mode")
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args = remove_valued_arguments(args, "--disaggregation-transfer-backend")
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args = remove_valued_arguments(args, "--disaggregation-bootstrap-port")
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# disable prefix caching
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if "--disable-radix-cache" not in args:
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args = append_argument(args, "--disable-radix-cache")
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worker_service.extraPodSpec.mainContainer.args = args
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elif target == "decode":
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# Get service names by inferring from subComponentType first
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prefill_service_name = get_service_name_by_type(
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cfg, "sglang", SubComponentType.PREFILL
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)
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decode_service_name = get_service_name_by_type(
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cfg, "sglang", SubComponentType.DECODE
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)
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# delete prefill worker
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del cfg.spec.services[prefill_service_name]
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# Set subComponentType for aggregated decode-only mode
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cfg.spec.services[decode_service_name].subComponentType = "decode"
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worker_service = get_worker_service_from_config(
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cfg,
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backend="sglang",
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sub_component_type=SubComponentType.DECODE,
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)
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args = validate_and_get_worker_args(worker_service, backend="sglang")
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args = break_arguments(args)
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# remove disagg flags
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args = remove_valued_arguments(args, "--disaggregation-mode")
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args = remove_valued_arguments(args, "--disaggregation-transfer-backend")
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args = remove_valued_arguments(args, "--disaggregation-bootstrap-port")
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# enable prefix caching
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if "--disable-radix-cache" in args:
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args.remove("--disable-radix-cache")
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if is_moe_model:
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# need to use round_robin dp attention routing for MoE models to ensure kv reuse can skip prefill
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if "--load-balance-method" in args:
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idx = args.index("--load-balance-method")
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args[idx + 1] = "round_robin"
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else:
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args = append_argument(
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args, ["--load-balance-method", "round_robin"]
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)
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worker_service.extraPodSpec.mainContainer.args = args
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# set num workers to 1
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# Use the inferred decode service name
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final_decode_service_name = get_service_name_by_type(
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cfg, "sglang", SubComponentType.DECODE
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)
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decode_worker_config = cfg.spec.services[final_decode_service_name]
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decode_worker_config.replicas = 1
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return cfg.model_dump()
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@classmethod
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def set_config_tp_size(
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cls,
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config: dict,
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tp_size: int,
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component_type: SubComponentType = SubComponentType.DECODE,
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):
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cfg = Config.model_validate(config)
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worker_service = get_worker_service_from_config(
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cfg, backend="sglang", sub_component_type=component_type
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)
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# Set up resources
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setup_worker_service_resources(worker_service, tp_size)
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# Get and validate args
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args = validate_and_get_worker_args(worker_service, backend="sglang")
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# Set --tp argument
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args = set_argument_value(args, "--tp", str(tp_size))
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worker_service.extraPodSpec.mainContainer.args = args
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return cfg.model_dump()
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@classmethod
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def set_config_tep_size(
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cls,
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config: dict,
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tep_size: int,
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num_gpus_per_node: int,
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component_type: SubComponentType = SubComponentType.DECODE,
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):
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cfg = Config.model_validate(config)
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worker_service = get_worker_service_from_config(
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cfg, backend="sglang", sub_component_type=component_type
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)
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# Set up resources with multinode configuration
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setup_worker_service_resources(worker_service, tep_size, num_gpus_per_node)
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# Get and validate args
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args = validate_and_get_worker_args(worker_service, backend="sglang")
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# 1. Set --tp=tep_size, if not present add it
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args = set_argument_value(args, "--tp", str(tep_size))
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# 2. Set --ep-size=tep_size, if not present add it
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args = set_argument_value(args, "--ep-size", str(tep_size))
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# 3. Remove --dp if present
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args = remove_valued_arguments(args, "--dp")
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# 4. Remove --enable-dp-attention if present
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if "--enable-dp-attention" in args:
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args.remove("--enable-dp-attention")
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worker_service.extraPodSpec.mainContainer.args = args
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return cfg.model_dump()
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@classmethod
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def set_config_dep_size(
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cls,
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config: dict,
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dep_size: int,
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num_gpus_per_node: int,
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component_type: SubComponentType = SubComponentType.DECODE,
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):
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cfg = Config.model_validate(config)
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worker_service = get_worker_service_from_config(
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cfg, backend="sglang", sub_component_type=component_type
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)
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# Set up resources with multinode configuration
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setup_worker_service_resources(worker_service, dep_size, num_gpus_per_node)
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# Get and validate args
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args = validate_and_get_worker_args(worker_service, backend="sglang")
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# 1. Set --tp=dep_size
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args = set_argument_value(args, "--tp", str(dep_size))
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# 2. Set --dp=dep_size (data parallelism across experts)
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args = set_argument_value(args, "--dp", str(dep_size))
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# 3. Enable --enable-dp-attention
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if "--enable-dp-attention" not in args:
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args = append_argument(args, "--enable-dp-attention")
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# 4. Set --ep-size=dep_size (expert parallelism size)
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args = set_argument_value(args, "--ep-size", str(dep_size))
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worker_service.extraPodSpec.mainContainer.args = args
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return cfg.model_dump()
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@classmethod
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def get_model_name(cls, config: dict) -> str:
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cfg = Config.model_validate(config)
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try:
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worker_service = get_worker_service_from_config(cfg, backend="sglang")
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args = validate_and_get_worker_args(worker_service, backend="sglang")
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except (ValueError, KeyError):
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logger.warning(
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f"Worker service missing or invalid, using default model name: {DEFAULT_MODEL_NAME}"
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)
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return DEFAULT_MODEL_NAME
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args = break_arguments(args)
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for i, arg in enumerate(args):
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if arg == "--served-model-name" and i + 1 < len(args):
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return args[i + 1]
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logger.warning(
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f"Model name not found in configuration args, using default model name: {DEFAULT_MODEL_NAME}"
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)
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return DEFAULT_MODEL_NAME
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@classmethod
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def get_port(cls, config: dict) -> int:
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cfg = Config.model_validate(config)
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frontend_service = cfg.spec.services.get("Frontend")
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if (
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not frontend_service
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or not frontend_service.extraPodSpec
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or not frontend_service.extraPodSpec.mainContainer
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):
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logger.warning(
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f"Frontend service or container not found, using default port: {DYNAMO_RUN_DEFAULT_PORT}"
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)
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return DYNAMO_RUN_DEFAULT_PORT
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args = frontend_service.extraPodSpec.mainContainer.args
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if not args:
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logger.warning(
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f"No args found in Frontend configuration, using default port: {DYNAMO_RUN_DEFAULT_PORT}"
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)
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return DYNAMO_RUN_DEFAULT_PORT
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args = break_arguments(args)
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try:
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idx = args.index("--http-port")
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return int(args[idx + 1])
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except (ValueError, IndexError):
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logger.warning(
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f"Port not found in configuration args, using default port: {DYNAMO_RUN_DEFAULT_PORT}"
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)
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return DYNAMO_RUN_DEFAULT_PORT
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@classmethod
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def get_kv_cache_size_from_dynamo_log(
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cls, dynamo_log_fn: str, attention_dp_size: int = 1
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) -> int:
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try:
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with open(dynamo_log_fn, "r") as f:
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for line in f:
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if "KV Cache is allocated" in line and "#tokens:" in line:
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# Extract the number after "#tokens:"
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match = re.search(r"#tokens:\s*(\d+)", line)
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if match:
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return int(match.group(1)) * attention_dp_size
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except Exception as e:
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logger.warning(f"Failed to parse KV cache size from log file. Error: {e}")
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return 0
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