refactor: restructure planner package into subpackage hierarchy (#7689)

Signed-off-by: hongkuanz <hongkuanz@nvidia.com>

.gitignore

@@ -108,7 +108,8 @@ TensorRT-LLM
 # The Linux kernel generates core dump files when a process crashes (receives signals
 # like SIGSEGV, SIGABRT, SIGBUS, etc.). The Linux container's /proc/sys/kernel/core_pattern
 # determines the filename (typically core or core.<pid>)
-core
+/core
+core.*
 
 # Ruler Generated Files
 /.cursor/instructions.md

components/src/dynamo/global_planner/scale_handler.py

@@ -7,8 +7,8 @@ import asyncio
 import logging
 
 from dynamo.planner import KubernetesConnector
-from dynamo.planner.kube import KubernetesAPI
-from dynamo.planner.scale_protocol import ScaleRequest, ScaleResponse, ScaleStatus
+from dynamo.planner.connectors.kubernetes_api import KubernetesAPI
+from dynamo.planner.connectors.protocol import ScaleRequest, ScaleResponse, ScaleStatus
 from dynamo.runtime import DistributedRuntime, dynamo_endpoint
 
 logger = logging.getLogger(__name__)

components/src/dynamo/mocker/utils/planner_profiler_perf_data_converter.py

@@ -33,7 +33,7 @@ from pathlib import Path
 
 import numpy as np
 
-from dynamo.planner.utils.perf_interpolation import (
+from dynamo.planner.core.throughput.interpolation import (
     DecodeInterpolator,
     PrefillInterpolator,
 )

components/src/dynamo/planner/__init__.py

@@ -11,13 +11,17 @@ __all__ = [
     "SubComponentType",
     "WorkerInfo",
 ]
-# Import the classes
-from dynamo.planner.defaults import SLAPlannerDefaults, SubComponentType
-from dynamo.planner.global_planner_connector import GlobalPlannerConnector
-from dynamo.planner.kubernetes_connector import KubernetesConnector, TargetReplica
-from dynamo.planner.planner_connector import PlannerConnector
-from dynamo.planner.virtual_connector import VirtualConnector
-from dynamo.planner.worker_info import WorkerInfo
+
+from dynamo.planner.config.defaults import (
+    SLAPlannerDefaults,
+    SubComponentType,
+    TargetReplica,
+)
+from dynamo.planner.connectors.base import PlannerConnector
+from dynamo.planner.connectors.global_planner import GlobalPlannerConnector
+from dynamo.planner.connectors.kubernetes import KubernetesConnector
+from dynamo.planner.connectors.virtual import VirtualConnector
+from dynamo.planner.monitoring.worker_info import WorkerInfo
 
 try:
     from ._version import __version__

components/src/dynamo/planner/__main__.py

@@ -20,11 +20,11 @@ from typing import Union
 
 from pydantic import BaseModel
 
-from dynamo.planner.utils.agg_planner import AggPlanner
-from dynamo.planner.utils.decode_planner import DecodePlanner
-from dynamo.planner.utils.disagg_planner import DisaggPlanner
-from dynamo.planner.utils.planner_config import PlannerConfig
-from dynamo.planner.utils.prefill_planner import PrefillPlanner
+from dynamo.planner.config.planner_config import PlannerConfig
+from dynamo.planner.core.agg import AggPlanner
+from dynamo.planner.core.decode import DecodePlanner
+from dynamo.planner.core.disagg import DisaggPlanner
+from dynamo.planner.core.prefill import PrefillPlanner
 from dynamo.runtime import DistributedRuntime, dynamo_worker
 
 logger = logging.getLogger(__name__)

components/src/dynamo/planner/config/backend_components.py

+# SPDX-FileCopyrightText: Copyright (c) 2025-2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+# SPDX-License-Identifier: Apache-2.0
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
+class ComponentName:
+    """Base class for backend component name configurations."""
+
+    prefill_worker_k8s_name: str = ""
+    prefill_worker_component_name: str = ""
+    prefill_worker_endpoint: str = ""
+    decode_worker_k8s_name: str = ""
+    decode_worker_component_name: str = ""
+    decode_worker_endpoint: str = ""
+
+
+class VllmComponentName(ComponentName):
+    prefill_worker_k8s_name = "VllmPrefillWorker"
+    prefill_worker_component_name = "prefill"
+    prefill_worker_endpoint = "generate"
+    decode_worker_k8s_name = "VllmDecodeWorker"
+    decode_worker_component_name = "backend"
+    decode_worker_endpoint = "generate"
+
+
+class SGLangComponentName(ComponentName):
+    prefill_worker_k8s_name = (
+        "prefill"  # use short name to stay within k8s limits with grove
+    )
+    prefill_worker_component_name = "prefill"
+    prefill_worker_endpoint = "generate"
+    decode_worker_k8s_name = (
+        "decode"  # use short name to stay within k8s limits with grove
+    )
+    decode_worker_component_name = "backend"
+    decode_worker_endpoint = "generate"
+
+
+class TrtllmComponentName(ComponentName):
+    # Unified frontend architecture (consistent with vLLM/SGLang):
+    # - Prefill workers use "prefill" component
+    # - Decode workers use "tensorrt_llm" component
+    prefill_worker_k8s_name = "TRTLLMPrefillWorker"
+    prefill_worker_component_name = "prefill"
+    prefill_worker_endpoint = "generate"
+    decode_worker_k8s_name = "TRTLLMDecodeWorker"
+    decode_worker_component_name = "tensorrt_llm"
+    decode_worker_endpoint = "generate"
+
+
+class MockerComponentName(ComponentName):
+    # Mocker backend for testing/simulation purposes
+    prefill_worker_k8s_name = "prefill"
+    prefill_worker_component_name = "prefill"
+    prefill_worker_endpoint = "generate"
+    decode_worker_k8s_name = "decode"
+    decode_worker_component_name = "backend"
+    decode_worker_endpoint = "generate"
+
+
+WORKER_COMPONENT_NAMES: dict[str, type[ComponentName]] = {
+    "vllm": VllmComponentName,
+    "sglang": SGLangComponentName,
+    "trtllm": TrtllmComponentName,
+    "mocker": MockerComponentName,
+}

components/src/dynamo/planner/config/defaults.py

+# SPDX-FileCopyrightText: Copyright (c) 2025-2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+# SPDX-License-Identifier: Apache-2.0
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import os
+from enum import Enum
+from typing import Literal, Optional
+
+from pydantic import BaseModel
+
+
+class BasePlannerDefaults:
+    # Namespace from DYN_NAMESPACE env var (injected by operator as "{k8s_namespace}-{dgd_name}")
+    namespace = os.environ.get("DYN_NAMESPACE", "dynamo")
+    environment: Literal["kubernetes", "virtual", "global-planner"] = "kubernetes"
+    backend: Literal["vllm", "sglang", "trtllm", "mocker"] = "vllm"
+    no_operation = False
+    log_dir = None
+    throughput_adjustment_interval = 180  # in seconds
+    max_gpu_budget = 8
+    min_endpoint = 1  # applies to both decode and prefill
+    decode_engine_num_gpu = 1
+    prefill_engine_num_gpu = 1
+    # Port for exposing planner's own metrics (0 means disabled)
+    metric_reporting_prometheus_port = int(os.environ.get("PLANNER_PROMETHEUS_PORT", 0))
+
+
+class SLAPlannerDefaults(BasePlannerDefaults):
+    # Prometheus endpoint URL for pulling/querying metrics
+    metric_pulling_prometheus_endpoint = os.environ.get(
+        "PROMETHEUS_ENDPOINT",
+        "http://prometheus-kube-prometheus-prometheus.monitoring.svc.cluster.local:9090",
+    )
+    profile_results_dir = "profiling_results"
+
+    isl = 3000  # in number of tokens
+    osl = 150  # in number of tokens
+    ttft = 500.0  # in milliseconds
+    itl = 50.0  # in milliseconds
+
+    # for load predictor
+    load_predictor = "arima"  # ["constant", "arima", "kalman", "prophet"]
+    prophet_window_size = 50
+    load_predictor_log1p = False
+    kalman_q_level = 1.0
+    kalman_q_trend = 0.1
+    kalman_r = 10.0
+    kalman_min_points = 5
+
+    no_correction = True
+    mode: Literal["disagg", "prefill", "decode", "agg"] = "disagg"
+
+    throughput_metrics_source: Literal["frontend", "router"] = "frontend"
+
+    # Scaling mode flags
+    enable_throughput_scaling = True
+    enable_load_scaling = False
+
+    # Load-based scaling settings
+    load_adjustment_interval = 5  # in seconds, must be < throughput_adjustment_interval
+    load_learning_window = 50  # sliding window size for regression
+    load_scaling_down_sensitivity = 80  # 0-100
+    load_metric_samples = 10  # number of samples per interval
+    load_min_observations = 5  # cold start threshold
+
+
+class SubComponentType(str, Enum):
+    PREFILL = "prefill"
+    DECODE = "decode"
+
+
+class TargetReplica(BaseModel):
+    sub_component_type: SubComponentType
+    component_name: Optional[str] = None
+    desired_replicas: int

components/src/dynamo/planner/utils/planner_config.py → components/src/dynamo/planner/config/planner_config.py

@@ -23,7 +23,7 @@ from typing import Literal, Optional
 import yaml
 from pydantic import BaseModel, Field, model_validator
 
-from dynamo.planner.defaults import SLAPlannerDefaults
+from dynamo.planner.config.defaults import SLAPlannerDefaults
 
 logger = logging.getLogger(__name__)
 

components/src/dynamo/planner/planner_connector.py → components/src/dynamo/planner/connectors/base.py

@@ -15,7 +15,7 @@
 
 from abc import ABC, abstractmethod
 
-from dynamo.planner.defaults import SubComponentType
+from dynamo.planner.config.defaults import SubComponentType
 
 
 # TODO: add ability to scale component to X replicas

components/src/dynamo/planner/global_planner_connector.py → components/src/dynamo/planner/connectors/global_planner.py

@@ -8,12 +8,11 @@ import os
 import time
 from typing import Optional
 
-from dynamo.planner.defaults import SubComponentType
-from dynamo.planner.kubernetes_connector import TargetReplica
-from dynamo.planner.planner_connector import PlannerConnector
-from dynamo.planner.remote_planner_client import RemotePlannerClient
-from dynamo.planner.scale_protocol import ScaleRequest, ScaleStatus
-from dynamo.planner.utils.exceptions import EmptyTargetReplicasError
+from dynamo.planner.config.defaults import SubComponentType, TargetReplica
+from dynamo.planner.connectors.base import PlannerConnector
+from dynamo.planner.connectors.protocol import ScaleRequest, ScaleStatus
+from dynamo.planner.connectors.remote_client import RemotePlannerClient
+from dynamo.planner.errors import EmptyTargetReplicasError
 from dynamo.runtime import DistributedRuntime
 from dynamo.runtime.logging import configure_dynamo_logging
 

components/src/dynamo/planner/kubernetes_connector.py → components/src/dynamo/planner/connectors/kubernetes.py

@@ -18,15 +18,10 @@ import logging
 import os
 from typing import Optional
 
-from pydantic import BaseModel
-
-from dynamo.planner.defaults import (
-    SubComponentType,
-    get_service_from_sub_component_type_or_name,
-)
-from dynamo.planner.kube import KubernetesAPI
-from dynamo.planner.planner_connector import PlannerConnector
-from dynamo.planner.utils.exceptions import (
+from dynamo.planner.config.defaults import SubComponentType, TargetReplica
+from dynamo.planner.connectors.base import PlannerConnector
+from dynamo.planner.connectors.kubernetes_api import KubernetesAPI
+from dynamo.planner.errors import (
     DeploymentModelNameMismatchError,
     DeploymentValidationError,
     EmptyTargetReplicasError,
@@ -34,19 +29,19 @@ from dynamo.planner.utils.exceptions import (
     PlannerError,
     UserProvidedModelNameMismatchError,
 )
-from dynamo.planner.worker_info import WorkerInfo, build_worker_info_from_defaults
+from dynamo.planner.monitoring.dgd_services import (
+    get_service_from_sub_component_type_or_name,
+)
+from dynamo.planner.monitoring.worker_info import (
+    WorkerInfo,
+    build_worker_info_from_defaults,
+)
 from dynamo.runtime.logging import configure_dynamo_logging
 
 configure_dynamo_logging()
 logger = logging.getLogger(__name__)
 
 
-class TargetReplica(BaseModel):
-    sub_component_type: SubComponentType
-    component_name: Optional[str] = None
-    desired_replicas: int
-
-
 class KubernetesConnector(PlannerConnector):
     def __init__(
         self,

components/src/dynamo/planner/kube.py → components/src/dynamo/planner/connectors/kubernetes_api.py

@@ -20,7 +20,7 @@ from typing import Optional
 from kubernetes import client, config
 from kubernetes.config.config_exception import ConfigException
 
-from dynamo.planner.utils.exceptions import DynamoGraphDeploymentNotFoundError
+from dynamo.planner.errors import DynamoGraphDeploymentNotFoundError
 from dynamo.runtime.logging import configure_dynamo_logging
 
 configure_dynamo_logging()

components/src/dynamo/planner/scale_protocol.py → components/src/dynamo/planner/connectors/protocol.py

@@ -8,7 +8,7 @@ from typing import List, Optional
 
 from pydantic import BaseModel
 
-from dynamo.planner.kubernetes_connector import TargetReplica
+from dynamo.planner.config.defaults import TargetReplica
 
 
 class ScaleStatus(str, Enum):

components/src/dynamo/planner/remote_planner_client.py → components/src/dynamo/planner/connectors/remote_client.py

@@ -7,8 +7,8 @@ import asyncio
 import logging
 
 from dynamo._core import Client
-from dynamo.planner.defaults import SubComponentType
-from dynamo.planner.scale_protocol import ScaleRequest, ScaleResponse
+from dynamo.planner.config.defaults import SubComponentType
+from dynamo.planner.connectors.protocol import ScaleRequest, ScaleResponse
 from dynamo.runtime import DistributedRuntime
 
 logger = logging.getLogger(__name__)

components/src/dynamo/planner/virtual_connector.py → components/src/dynamo/planner/connectors/virtual.py

@@ -6,9 +6,9 @@ import os
 from typing import Optional
 
 from dynamo._core import VirtualConnectorCoordinator
-from dynamo.planner import SubComponentType, TargetReplica
-from dynamo.planner.planner_connector import PlannerConnector
-from dynamo.planner.utils.exceptions import EmptyTargetReplicasError
+from dynamo.planner.config.defaults import SubComponentType, TargetReplica
+from dynamo.planner.connectors.base import PlannerConnector
+from dynamo.planner.errors import EmptyTargetReplicasError
 from dynamo.runtime import DistributedRuntime
 from dynamo.runtime.logging import configure_dynamo_logging
 

components/src/dynamo/planner/utils/agg_planner.py → components/src/dynamo/planner/core/agg.py

@@ -5,19 +5,20 @@ import asyncio
 import logging
 from typing import TYPE_CHECKING, Optional
 
-from dynamo.planner import SubComponentType, TargetReplica
-from dynamo.planner.defaults import WORKER_COMPONENT_NAMES
-from dynamo.planner.utils.planner_config import PlannerConfig
+from dynamo.planner.config.backend_components import WORKER_COMPONENT_NAMES
+from dynamo.planner.config.defaults import SubComponentType, TargetReplica
+from dynamo.planner.config.planner_config import PlannerConfig
 
 if TYPE_CHECKING:
     from dynamo.common.forward_pass_metrics import ForwardPassMetrics
-from dynamo.planner.utils.planner_core import (
-    BasePlanner,
-    PlannerPrometheusMetrics,
-    PlannerSharedState,
+
+from dynamo.planner.core.base import BasePlanner
+from dynamo.planner.core.budget import (
     _apply_component_gpu_budget,
     _initialize_gpu_counts,
 )
+from dynamo.planner.core.state import PlannerSharedState
+from dynamo.planner.monitoring.planner_metrics import PlannerPrometheusMetrics
 from dynamo.runtime import DistributedRuntime
 from dynamo.runtime.logging import configure_dynamo_logging
 
@@ -67,7 +68,7 @@ class AggPlanner:
             component_type=SubComponentType.DECODE,
         )
 
-        from dynamo.planner.utils.fpm_regression import AggRegressionModel
+        from dynamo.planner.core.load.fpm_regression import AggRegressionModel
 
         self.regression = AggRegressionModel(
             window_size=config.load_learning_window,

components/src/dynamo/planner/utils/planner_core.py → components/src/dynamo/planner/core/base.py

@@ -3,249 +3,45 @@
 
 import asyncio
 import logging
-import math
 import time
-from dataclasses import dataclass, field
 from typing import TYPE_CHECKING, Optional, Union
 
-from prometheus_client import Gauge, start_http_server
-
-from dynamo.planner import (
-    KubernetesConnector,
-    SubComponentType,
-    TargetReplica,
-    VirtualConnector,
+from prometheus_client import start_http_server
+
+from dynamo.planner.config.backend_components import WORKER_COMPONENT_NAMES
+from dynamo.planner.config.defaults import SubComponentType, TargetReplica
+from dynamo.planner.config.planner_config import PlannerConfig
+from dynamo.planner.connectors.global_planner import GlobalPlannerConnector
+from dynamo.planner.connectors.kubernetes import KubernetesConnector
+from dynamo.planner.connectors.virtual import VirtualConnector
+from dynamo.planner.core.budget import (
+    _apply_component_gpu_budget,
+    _initialize_gpu_counts,
+)
+from dynamo.planner.core.load.predictors import LOAD_PREDICTORS
+from dynamo.planner.core.state import PlannerSharedState
+from dynamo.planner.core.throughput.interpolation import (
+    DecodeInterpolator,
+    PrefillInterpolator,
 )
-from dynamo.planner.defaults import WORKER_COMPONENT_NAMES
-from dynamo.planner.global_planner_connector import GlobalPlannerConnector
-from dynamo.planner.utils.exceptions import DeploymentValidationError
+from dynamo.planner.core.throughput.pre_swept_results import PreSweptResultsHelper
+from dynamo.planner.monitoring.planner_metrics import PlannerPrometheusMetrics
+from dynamo.planner.monitoring.traffic_metrics import Metrics, PrometheusAPIClient
+from dynamo.planner.monitoring.worker_info import WorkerInfo, resolve_worker_info
+from dynamo.planner.offline.trace_data import extract_metrics_from_mooncake
 
 if TYPE_CHECKING:
     from dynamo.common.forward_pass_metrics import ForwardPassMetrics
     from dynamo.llm import FpmEventSubscriber
-from dynamo.planner.utils.load_predictor import LOAD_PREDICTORS
-from dynamo.planner.utils.perf_interpolation import (
-    DecodeInterpolator,
-    PrefillInterpolator,
-)
-from dynamo.planner.utils.planner_config import PlannerConfig
-from dynamo.planner.utils.pre_swept_results_utils import PreSweptResultsHelper
-from dynamo.planner.utils.prometheus import Metrics, PrometheusAPIClient
-from dynamo.planner.utils.trace_data_extractor import extract_metrics_from_mooncake
-from dynamo.planner.worker_info import WorkerInfo, resolve_worker_info
 from dynamo.runtime import DistributedRuntime
 from dynamo.runtime.logging import configure_dynamo_logging
 
-# Union of all connector types used by the planner
 ConnectorType = Union[GlobalPlannerConnector, KubernetesConnector, VirtualConnector]
 
 configure_dynamo_logging()
 logger = logging.getLogger(__name__)
 
 
-class PlannerPrometheusMetrics:
-    """Container for all Planner Prometheus metrics."""
-
-    def __init__(self, prefix: str = "planner"):
-        # Worker counts
-        self.num_p_workers = Gauge(
-            f"{prefix}:num_p_workers", "Number of prefill workers"
-        )
-        self.num_d_workers = Gauge(
-            f"{prefix}:num_d_workers", "Number of decode workers"
-        )
-
-        # Observed metrics
-        self.observed_ttft = Gauge(
-            f"{prefix}:observed_ttft", "Observed time to first token (ms)"
-        )
-        self.observed_itl = Gauge(
-            f"{prefix}:observed_itl", "Observed inter-token latency (ms)"
-        )
-        self.observed_request_rate = Gauge(
-            f"{prefix}:observed_request_rate", "Observed request rate (req/s)"
-        )
-        self.observed_request_duration = Gauge(
-            f"{prefix}:observed_request_duration", "Observed request duration (s)"
-        )
-        self.observed_isl = Gauge(
-            f"{prefix}:observed_isl", "Observed input sequence length"
-        )
-        self.observed_osl = Gauge(
-            f"{prefix}:observed_osl", "Observed output sequence length"
-        )
-
-        # Correction factors
-        self.p_correction_factor = Gauge(
-            f"{prefix}:p_correction_factor", "Prefill correction factor"
-        )
-        self.d_correction_factor = Gauge(
-            f"{prefix}:d_correction_factor", "Decode correction factor"
-        )
-
-        # Predicted metrics
-        self.predicted_request_rate = Gauge(
-            f"{prefix}:predicted_request_rate", "Predicted request rate (req/s)"
-        )
-        self.predicted_isl = Gauge(
-            f"{prefix}:predicted_isl", "Predicted input sequence length"
-        )
-        self.predicted_osl = Gauge(
-            f"{prefix}:predicted_osl", "Predicted output sequence length"
-        )
-        self.predicted_num_p = Gauge(
-            f"{prefix}:predicted_num_p", "Predicted number of prefill replicas"
-        )
-        self.predicted_num_d = Gauge(
-            f"{prefix}:predicted_num_d", "Predicted number of decode replicas"
-        )
-
-        # Cumulative GPU usage
-        self.gpu_hours = Gauge(f"{prefix}:gpu_hours", "Cumulative GPU hours used")
-
-
-@dataclass
-class PlannerSharedState:
-    last_metrics: Metrics = field(default_factory=Metrics)
-    num_p_workers: int = 0
-    num_d_workers: int = 0
-    cumulative_gpu_hours: float = 0.0
-    last_adjustment_time: float = 0.0
-    # Lower bounds from throughput-based scaling (used when both modes enabled)
-    throughput_lower_bound_p: int = 1
-    throughput_lower_bound_d: int = 1
-    # Separate timestamp for load-based adjustment loop
-    last_load_adjustment_time: float = 0.0
-
-
-def _apply_global_gpu_budget(
-    next_num_p: int, next_num_d: int, config: PlannerConfig
-) -> tuple[int, int]:
-    """Apply GPU budget constraint to both prefill and decode replicas.
-
-    When total GPUs required (num_p * prefill_gpus + num_d * decode_gpus) exceeds the
-    budget, scale down both proportionally using scale = budget / total_required. Prefill
-    replicas are clamped to [min_endpoint, max_prefill] where max_prefill reserves enough
-    GPUs for min_endpoint decode replicas. Remaining budget is then allocated to decode.
-    Returns (0, 0) if budget cannot satisfy min_endpoint for both components.
-    """
-    if config.max_gpu_budget < 0:
-        return next_num_p, next_num_d
-    assert config.prefill_engine_num_gpu is not None
-    assert config.decode_engine_num_gpu is not None
-    total_gpu_required = (
-        next_num_p * config.prefill_engine_num_gpu
-        + next_num_d * config.decode_engine_num_gpu
-    )
-    if total_gpu_required <= config.max_gpu_budget:
-        return next_num_p, next_num_d
-    min_required = (
-        config.min_endpoint * config.prefill_engine_num_gpu
-        + config.min_endpoint * config.decode_engine_num_gpu
-    )
-    if config.max_gpu_budget < min_required:
-        logger.warning(
-            f"max_gpu_budget ({config.max_gpu_budget}) is below the minimum required "
-            f"for min_endpoint ({min_required}); enforcing zero replicas"
-        )
-        return 0, 0
-    scale = config.max_gpu_budget / total_gpu_required
-    max_prefill = math.floor(
-        (config.max_gpu_budget - config.min_endpoint * config.decode_engine_num_gpu)
-        / config.prefill_engine_num_gpu
-    )
-    next_num_p = max(
-        config.min_endpoint, min(max_prefill, math.floor(next_num_p * scale))
-    )
-    remaining = config.max_gpu_budget - next_num_p * config.prefill_engine_num_gpu
-    next_num_d = max(
-        config.min_endpoint, math.floor(remaining / config.decode_engine_num_gpu)
-    )
-    logger.warning(
-        f"Total number of GPUs required ({total_gpu_required}) exceeds the max GPU budget ({config.max_gpu_budget}), "
-        f"scaling down to {next_num_p} prefill and {next_num_d} decode replicas"
-    )
-    return next_num_p, next_num_d
-
-
-def _apply_component_gpu_budget(
-    desired_replicas: int, engine_num_gpu: int, config: PlannerConfig
-) -> int:
-    """Apply GPU budget constraint to a single component (prefill-only or decode-only).
-
-    When total GPUs required (replicas * gpus_per_replica) exceeds the budget, scale down
-    using scale = budget / total_required, floored and clamped to at least min_endpoint.
-    Returns 0 if budget cannot satisfy min_endpoint replicas.
-    """
-    if config.max_gpu_budget < 0:
-        return desired_replicas
-    total_gpu_required = desired_replicas * engine_num_gpu
-    if total_gpu_required <= config.max_gpu_budget:
-        return desired_replicas
-    min_required = config.min_endpoint * engine_num_gpu
-    if config.max_gpu_budget < min_required:
-        logger.warning(
-            f"max_gpu_budget ({config.max_gpu_budget}) is below the minimum required "
-            f"for min_endpoint ({min_required}); enforcing zero replicas"
-        )
-        return 0
-    scale = config.max_gpu_budget / total_gpu_required
-    next_num = max(config.min_endpoint, math.floor(desired_replicas * scale))
-    logger.warning(
-        f"Total number of GPUs required ({total_gpu_required}) exceeds the max GPU budget ({config.max_gpu_budget}), "
-        f"scaling down to {next_num} replicas"
-    )
-    return next_num
-
-
-def _initialize_gpu_counts(
-    config: PlannerConfig,
-    connector,
-    require_prefill: bool,
-    require_decode: bool,
-) -> None:
-    """Initialize GPU counts from DGD (Kubernetes) or config (virtual).
-
-    In Kubernetes mode: reads from DGD, falls back to CLI flags if not found
-    (useful for mockers that don't specify GPU resources).
-    In virtual mode: requires CLI flags, errors if not provided.
-
-    Raises:
-        DeploymentValidationError: If GPU counts cannot be determined
-    """
-    # Try to read from DGD in Kubernetes mode
-    if hasattr(connector, "get_gpu_counts"):
-        try:
-            prefill_gpu, decode_gpu = connector.get_gpu_counts(
-                require_prefill=require_prefill,
-                require_decode=require_decode,
-            )
-            config.prefill_engine_num_gpu = prefill_gpu
-            config.decode_engine_num_gpu = decode_gpu
-            logger.info(
-                f"Detected GPU counts from DGD: prefill={prefill_gpu}, decode={decode_gpu}"
-            )
-            return
-        except Exception as e:
-            # Fall back to CLI flags (e.g., for mockers without GPU resources in DGD)
-            logger.warning(
-                f"Could not read GPU counts from DGD ({e}), falling back to CLI flags"
-            )
-
-    # Use CLI flags (virtual mode, or K8s fallback when DGD lacks GPU resources)
-    errors = []
-    if require_prefill and config.prefill_engine_num_gpu is None:
-        errors.append("Missing prefill_engine_num_gpu in config")
-    if require_decode and config.decode_engine_num_gpu is None:
-        errors.append("Missing decode_engine_num_gpu in config")
-    if errors:
-        raise DeploymentValidationError(errors)
-    logger.info(
-        f"Using GPU counts from CLI: prefill={config.prefill_engine_num_gpu}, "
-        f"decode={config.decode_engine_num_gpu}"
-    )
-
-
 class BasePlanner:
     component_type: SubComponentType
 
@@ -429,7 +225,7 @@ class BasePlanner:
             self.no_correction = config.no_correction
 
         if self.enable_load:
-            from dynamo.planner.utils.fpm_regression import (
+            from dynamo.planner.core.load.fpm_regression import (
                 DecodeRegressionModel,
                 PrefillRegressionModel,
             )
@@ -755,7 +551,6 @@ class BasePlanner:
 
     def predict_load(self) -> tuple[Optional[float], Optional[float], Optional[float]]:
         try:
-            # predict the next load
             next_num_req = self.num_req_predictor.predict_next()
             next_isl = self.isl_predictor.predict_next()
             next_osl = self.osl_predictor.predict_next()
@@ -775,7 +570,6 @@ class BasePlanner:
         self.osl_predictor.add_data_point(osl_avg)
 
     def plan_adjustment(self) -> Optional[int]:
-        # Skip adjustment if no traffic
         if not self.last_metrics.is_valid():
             logger.info(
                 "Metrics contain None or NaN values (no active requests), skipping adjustment"