Files
lerobot/examples/rtc/eval_dataset.py
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2025-11-15 00:09:01 +07:00

685 lines
26 KiB
Python

#!/usr/bin/env python
"""
Evaluate Real-Time Chunking (RTC) performance on dataset samples.
This script takes two random samples from a dataset:
- Uses actions from the first sample as previous chunk
- Generates new actions for the second sample with and without RTC
It compares action predictions with and without RTC on dataset samples,
measuring consistency and ground truth alignment.
Usage:
# Basic usage with smolvla policy
uv run python examples/rtc/eval_dataset.py \
--policy.path=helper2424/smolvla_check_rtc_last3 \
--dataset.repo_id=helper2424/check_rtc \
--rtc.execution_horizon=8 \
--device=mps
# Basic usage with pi0.5 policy
uv run python examples/rtc/eval_dataset.py \
--policy.path=lerobot/pi05_libero_finetuned \
--dataset.repo_id=HuggingFaceVLA/libero \
--rtc.execution_horizon=8 \
--device=mps
# Basic usage with pi0.5 policy with cuda device
uv run python examples/rtc/eval_dataset.py \
--policy.path=lerobot/pi05_libero_finetuned \
--dataset.repo_id=HuggingFaceVLA/libero \
--rtc.execution_horizon=8 \
--device=cuda
# Basic usage with pi0 policy with cuda device
uv run python examples/rtc/eval_dataset.py \
--policy.path=lerobot/pi0_libero_finetuned \
--dataset.repo_id=HuggingFaceVLA/libero \
--rtc.execution_horizon=8 \
--device=cuda
# With torch.compile for faster inference (PyTorch 2.0+)
# Note: CUDA graphs disabled by default due to in-place ops in denoising loop
uv run python examples/rtc/eval_dataset.py \
--policy.path=helper2424/smolvla_check_rtc_last3 \
--dataset.repo_id=helper2424/check_rtc \
--rtc.execution_horizon=8 \
--device=mps \
--use_torch_compile=true \
--torch_compile_mode=max-autotune
# With torch.compile on CUDA (CUDA graphs disabled by default)
uv run python examples/rtc/eval_dataset.py \
--policy.path=helper2424/smolvla_check_rtc_last3 \
--dataset.repo_id=helper2424/check_rtc \
--rtc.execution_horizon=8 \
--device=cuda \
--use_torch_compile=true \
--torch_compile_mode=reduce-overhead
# Enable CUDA graphs (advanced - may cause tensor aliasing errors)
uv run python examples/rtc/eval_dataset.py \
--policy.path=helper2424/smolvla_check_rtc_last3 \
--dataset.repo_id=helper2424/check_rtc \
--use_torch_compile=true \
--torch_compile_backend=inductor \
--torch_compile_mode=max-autotune \
--torch_compile_disable_cudagraphs=false
"""
import gc
import logging
import os
import random
from dataclasses import dataclass, field
import matplotlib.pyplot as plt
import numpy as np
import torch
from lerobot.configs import parser
from lerobot.configs.default import DatasetConfig
from lerobot.configs.policies import PreTrainedConfig
from lerobot.configs.types import RTCAttentionSchedule
from lerobot.datasets.factory import resolve_delta_timestamps
from lerobot.datasets.lerobot_dataset import LeRobotDataset, LeRobotDatasetMetadata
from lerobot.policies.factory import get_policy_class, make_pre_post_processors
from lerobot.policies.rtc.configuration_rtc import RTCConfig
from lerobot.policies.rtc.debug_visualizer import RTCDebugVisualizer
from lerobot.utils.hub import HubMixin
from lerobot.utils.utils import init_logging
def set_seed(seed: int):
"""Set random seed for reproducibility."""
random.seed(seed)
np.random.seed(seed)
torch.manual_seed(seed)
if torch.cuda.is_available():
torch.cuda.manual_seed(seed)
torch.cuda.manual_seed_all(seed)
if torch.backends.mps.is_available():
torch.mps.manual_seed(seed)
torch.backends.cudnn.deterministic = True
torch.backends.cudnn.benchmark = False
@dataclass
class RTCEvalConfig(HubMixin):
"""Configuration for RTC evaluation."""
# Policy configuration
policy: PreTrainedConfig | None = None
# Dataset configuration
dataset: DatasetConfig = field(default_factory=DatasetConfig)
# RTC configuration
rtc: RTCConfig = field(
default_factory=lambda: RTCConfig(
enabled=True,
execution_horizon=20,
max_guidance_weight=10.0,
prefix_attention_schedule=RTCAttentionSchedule.EXP,
debug=True,
debug_maxlen=1000,
)
)
# Device configuration
device: str | None = field(
default=None,
metadata={"help": "Device to run on (cuda, cpu, mps, auto)"},
)
# Output configuration
output_dir: str = field(
default="rtc_debug_output",
metadata={"help": "Directory to save debug visualizations"},
)
# Seed configuration
seed: int = field(
default=42,
metadata={"help": "Random seed for reproducibility"},
)
inference_delay: int = field(
default=4,
metadata={"help": "Inference delay for RTC"},
)
# Torch compile configuration
use_torch_compile: bool = field(
default=False,
metadata={"help": "Use torch.compile for faster inference (PyTorch 2.0+)"},
)
torch_compile_backend: str = field(
default="inductor",
metadata={"help": "Backend for torch.compile (inductor, aot_eager, cudagraphs)"},
)
torch_compile_mode: str = field(
default="default",
metadata={"help": "Compilation mode (default, reduce-overhead, max-autotune)"},
)
torch_compile_disable_cudagraphs: bool = field(
default=True,
metadata={
"help": "Disable CUDA graphs in torch.compile. Required due to in-place tensor "
"operations in denoising loop (x_t += dt * v_t) which cause tensor aliasing issues."
},
)
def __post_init__(self):
# Parse policy path
policy_path = parser.get_path_arg("policy")
if policy_path:
cli_overrides = parser.get_cli_overrides("policy")
self.policy = PreTrainedConfig.from_pretrained(policy_path, cli_overrides=cli_overrides)
self.policy.pretrained_path = policy_path
else:
raise ValueError("Policy path is required (--policy.path)")
# Auto-detect device if not specified
if self.device is None or self.device == "auto":
if torch.cuda.is_available():
self.device = "cuda"
elif torch.backends.mps.is_available():
self.device = "mps"
else:
self.device = "cpu"
logging.info(f"Auto-detected device: {self.device}")
@classmethod
def __get_path_fields__(cls) -> list[str]:
"""This enables the parser to load config from the policy using `--policy.path=local/dir`"""
return ["policy"]
class RTCEvaluator:
"""Evaluator for RTC on dataset samples."""
def __init__(self, cfg: RTCEvalConfig):
self.cfg = cfg
self.device = cfg.device
# Load dataset with proper delta_timestamps based on policy configuration
# Calculate delta_timestamps using the same logic as make_dataset factory
logging.info(f"Loading dataset: {cfg.dataset.repo_id}")
# Get dataset metadata to extract FPS
ds_meta = LeRobotDatasetMetadata(cfg.dataset.repo_id)
# Calculate delta_timestamps from policy's delta_indices
delta_timestamps = resolve_delta_timestamps(cfg.policy, ds_meta)
# Create dataset with calculated delta_timestamps
self.dataset = LeRobotDataset(
cfg.dataset.repo_id,
delta_timestamps=delta_timestamps,
)
logging.info(f"Dataset loaded: {len(self.dataset)} samples, {self.dataset.num_episodes} episodes")
# Create preprocessor/postprocessor
self.preprocessor, self.postprocessor = make_pre_post_processors(
policy_cfg=cfg.policy,
pretrained_path=cfg.policy.pretrained_path,
preprocessor_overrides={
"device_processor": {"device": self.device},
},
)
logging.info("=" * 80)
logging.info("Ready to run evaluation with sequential policy loading:")
logging.info(" 1. policy_prev_chunk - Generate reference chunk, then destroy")
logging.info(" 2. policy_no_rtc - Generate without RTC, then destroy")
logging.info(" 3. policy_rtc - Generate with RTC, then destroy")
logging.info(" Note: Only one policy in memory at a time for efficient memory usage")
logging.info("=" * 80)
def _init_policy(self, name: str, rtc_enabled: bool, rtc_debug: bool):
"""Initialize a single policy instance with specified RTC configuration.
Args:
name: Name identifier for logging purposes
rtc_enabled: Whether to enable RTC for this policy
rtc_debug: Whether to enable debug tracking for this policy
Returns:
Configured policy instance with optional torch.compile applied
"""
logging.info(f"Initializing {name}...")
# Load policy from pretrained
policy_class = get_policy_class(self.cfg.policy.type)
config = PreTrainedConfig.from_pretrained(self.cfg.policy.pretrained_path)
if self.cfg.policy.type == "pi05" or self.cfg.policy.type == "pi0":
config.compile_model = self.cfg.torch_compile_mode
config.compile_mode = self.cfg.torch_compile_mode
policy = policy_class.from_pretrained(self.cfg.policy.pretrained_path, config=config)
policy = policy.to(self.device)
policy.eval()
# Configure RTC
rtc_config = RTCConfig(
enabled=rtc_enabled,
execution_horizon=self.cfg.rtc.execution_horizon,
max_guidance_weight=self.cfg.rtc.max_guidance_weight,
prefix_attention_schedule=self.cfg.rtc.prefix_attention_schedule,
debug=rtc_debug,
debug_maxlen=self.cfg.rtc.debug_maxlen,
)
policy.config.rtc_config = rtc_config
policy.init_rtc_processor()
logging.info(f" RTC enabled: {rtc_enabled}")
logging.info(f" RTC debug: {rtc_debug}")
logging.info(f" Policy config: {config}")
# Apply torch.compile to predict_action_chunk method if enabled
if self.cfg.use_torch_compile:
policy = self._apply_torch_compile(policy, name)
logging.info(f"{name} initialized successfully")
return policy
def _apply_torch_compile(self, policy, policy_name: str):
"""Apply torch.compile to the policy's predict_action_chunk method.
Args:
policy: Policy instance to compile
policy_name: Name for logging purposes
Returns:
Policy with compiled predict_action_chunk method
"""
# PI models handle their own compilation
if policy.type == "pi05" or policy.type == "pi0":
return policy
try:
# Check if torch.compile is available (PyTorch 2.0+)
if not hasattr(torch, "compile"):
logging.warning(
f" [{policy_name}] torch.compile is not available. Requires PyTorch 2.0+. "
f"Current version: {torch.__version__}. Skipping compilation."
)
return policy
logging.info(f" [{policy_name}] Applying torch.compile to predict_action_chunk...")
logging.info(f" Backend: {self.cfg.torch_compile_backend}")
logging.info(f" Mode: {self.cfg.torch_compile_mode}")
logging.info(f" Disable CUDA graphs: {self.cfg.torch_compile_disable_cudagraphs}")
logging.info(" Note: Debug tracker excluded from compilation via @torch._dynamo.disable")
# Compile the predict_action_chunk method
# - Debug tracker is excluded from compilation via @torch._dynamo.disable
# - CUDA graphs disabled to prevent tensor aliasing from in-place ops (x_t += dt * v_t)
compile_kwargs = {
"backend": self.cfg.torch_compile_backend,
"mode": self.cfg.torch_compile_mode,
}
# Disable CUDA graphs if requested (prevents tensor aliasing issues)
if self.cfg.torch_compile_disable_cudagraphs:
compile_kwargs["options"] = {"triton.cudagraphs": False}
original_method = policy.predict_action_chunk
compiled_method = torch.compile(original_method, **compile_kwargs)
policy.predict_action_chunk = compiled_method
logging.info(f" ✓ [{policy_name}] Successfully compiled predict_action_chunk")
except Exception as e:
logging.error(f" [{policy_name}] Failed to apply torch.compile: {e}")
logging.warning(f" [{policy_name}] Continuing without torch.compile")
return policy
def _destroy_policy(self, policy, policy_name: str):
"""Explicitly destroy a policy and free all associated memory.
This method performs aggressive cleanup to ensure maximum memory is freed,
which is critical for large models (e.g., VLAs with billions of parameters).
Args:
policy: Policy instance to destroy
policy_name: Name for logging purposes
"""
logging.info(f" Destroying {policy_name} and freeing memory...")
try:
# Step 1: Move policy to CPU to free GPU/MPS memory
policy.cpu()
# Step 2: Delete the policy object
del policy
# Step 3: Force garbage collection to reclaim memory immediately
gc.collect()
# Step 4: Clear device-specific caches
if torch.cuda.is_available():
torch.cuda.empty_cache()
torch.cuda.synchronize() # Ensure all operations complete
if torch.backends.mps.is_available():
torch.mps.empty_cache()
logging.info(f"{policy_name} destroyed and memory freed")
except Exception as e:
logging.warning(f" Warning: Error during {policy_name} cleanup: {e}")
def run_evaluation(self):
"""Run evaluation on two random dataset samples using three separate policies.
Note: Policies are deinitalized after each step to free memory. Large models
(e.g., VLA models with billions of parameters) cannot fit three instances in
memory simultaneously. By deleting and garbage collecting after each step,
we ensure only one policy is loaded at a time.
"""
# Create output directory
os.makedirs(self.cfg.output_dir, exist_ok=True)
logging.info(f"Output directory: {self.cfg.output_dir}")
logging.info("=" * 80)
logging.info("Starting RTC evaluation")
logging.info(f"Inference delay: {self.cfg.inference_delay}")
logging.info("=" * 80)
# Load two random samples from dataset
data_loader = torch.utils.data.DataLoader(self.dataset, batch_size=1, shuffle=True)
loader_iter = iter(data_loader)
first_sample = next(loader_iter)
second_sample = next(loader_iter)
preprocessed_first_sample = self.preprocessor(first_sample)
preprocessed_second_sample = self.preprocessor(second_sample)
# ============================================================================
# Step 1: Generate previous chunk using policy_prev_chunk
# ============================================================================
# This policy is only used to generate the reference chunk and then freed
logging.info("=" * 80)
logging.info("Step 1: Generating previous chunk with policy_prev_chunk")
logging.info("=" * 80)
# Initialize policy 1
policy_prev_chunk_policy = self._init_policy(
name="policy_prev_chunk",
rtc_enabled=False,
rtc_debug=False,
)
with torch.no_grad():
prev_chunk_left_over = policy_prev_chunk_policy.predict_action_chunk(
preprocessed_first_sample,
)[:, :25, :].squeeze(0)
logging.info(f" Generated prev_chunk shape: {prev_chunk_left_over.shape}")
# Destroy policy_prev_chunk to free memory for large models
self._destroy_policy(policy_prev_chunk_policy, "policy_prev_chunk")
# ============================================================================
# Step 2: Generate actions WITHOUT RTC using policy_no_rtc
# ============================================================================
logging.info("=" * 80)
logging.info("Step 2: Generating actions WITHOUT RTC with policy_no_rtc")
logging.info("=" * 80)
# Initialize policy 2
policy_no_rtc_policy = self._init_policy(
name="policy_no_rtc",
rtc_enabled=False,
rtc_debug=True,
)
# Sample noise (use same noise for both RTC and non-RTC for fair comparison)
noise_size = (1, policy_no_rtc_policy.config.chunk_size, policy_no_rtc_policy.config.max_action_dim)
noise = policy_no_rtc_policy.model.sample_noise(noise_size, self.device)
noise_clone = noise.clone()
policy_no_rtc_policy.rtc_processor.reset_tracker()
with torch.no_grad():
_ = policy_no_rtc_policy.predict_action_chunk(
preprocessed_second_sample,
noise=noise,
)
no_rtc_tracked_steps = policy_no_rtc_policy.rtc_processor.tracker.get_all_steps()
logging.info(f" Tracked {len(no_rtc_tracked_steps)} steps without RTC")
# Destroy policy_no_rtc to free memory before loading policy_rtc
self._destroy_policy(policy_no_rtc_policy, "policy_no_rtc")
# ============================================================================
# Step 3: Generate actions WITH RTC using policy_rtc
# ============================================================================
logging.info("=" * 80)
logging.info("Step 3: Generating actions WITH RTC with policy_rtc")
logging.info("=" * 80)
# Initialize policy 3
policy_rtc_policy = self._init_policy(
name="policy_rtc",
rtc_enabled=True,
rtc_debug=True,
)
policy_rtc_policy.rtc_processor.reset_tracker()
with torch.no_grad():
_ = policy_rtc_policy.predict_action_chunk(
preprocessed_second_sample,
noise=noise_clone,
inference_delay=self.cfg.inference_delay,
prev_chunk_left_over=prev_chunk_left_over,
execution_horizon=self.cfg.rtc.execution_horizon,
)
rtc_tracked_steps = policy_rtc_policy.rtc_processor.get_all_debug_steps()
logging.info(f" Tracked {len(rtc_tracked_steps)} steps with RTC")
# Save num_steps before destroying policy (needed for plotting)
num_steps = policy_rtc_policy.config.num_steps
# Destroy policy_rtc after final use
self._destroy_policy(policy_rtc_policy, "policy_rtc")
# Plot and save results
logging.info("=" * 80)
logging.info("Plotting results...")
self.plot_tracked_data(rtc_tracked_steps, no_rtc_tracked_steps, prev_chunk_left_over, num_steps)
logging.info("=" * 80)
logging.info("Evaluation completed successfully")
def plot_tracked_data(self, rtc_tracked_steps, no_rtc_tracked_steps, prev_chunk_left_over, num_steps):
# Create side-by-side figures for denoising visualization
fig_xt, axs_xt = self._create_figure("x_t Denoising: No RTC (left) vs RTC (right)")
fig_vt, axs_vt = self._create_figure("v_t Denoising: No RTC (left) vs RTC (right)")
fig_corr, axs_corr = self._create_figure("Correction: No RTC (left) vs RTC (right)")
fig_x1t, axs_x1t = self._create_figure(
"x1_t Predicted State & Error: No RTC (left - empty) vs RTC (right)"
)
self._plot_denoising_steps_from_tracker(
rtc_tracked_steps,
axs_xt[:, 1], # Right column for x_t
axs_vt[:, 1], # Right column for v_t
axs_corr[:, 1], # Right column for correction
axs_x1t[:, 1], # Right column for x1_t
num_steps,
)
self._plot_denoising_steps_from_tracker(
no_rtc_tracked_steps,
axs_xt[:, 0], # Left column for x_t
axs_vt[:, 0], # Left column for v_t
axs_corr[:, 0], # Left column for correction
axs_x1t[:, 0], # Left column for x1_t
num_steps,
)
# Plot ground truth on x_t axes
RTCDebugVisualizer.plot_waypoints(
axs_xt[:, 1], prev_chunk_left_over, start_from=0, color="red", label="Ground truth"
)
# Plot ground truth on x1_t axes
RTCDebugVisualizer.plot_waypoints(
axs_x1t[:, 1], prev_chunk_left_over, start_from=0, color="red", label="Ground truth"
)
# Plot ground truth on x_t axes
RTCDebugVisualizer.plot_waypoints(
axs_xt[:, 0], prev_chunk_left_over, start_from=0, color="red", label="Ground truth"
)
RTCDebugVisualizer.plot_waypoints(
axs_x1t[:, 0], prev_chunk_left_over, start_from=0, color="red", label="Ground truth"
)
# Save denoising plots
self._save_figure(fig_xt, os.path.join(self.cfg.output_dir, "denoising_xt_comparison.png"))
self._save_figure(fig_vt, os.path.join(self.cfg.output_dir, "denoising_vt_comparison.png"))
self._save_figure(fig_corr, os.path.join(self.cfg.output_dir, "denoising_correction_comparison.png"))
self._save_figure(fig_x1t, os.path.join(self.cfg.output_dir, "denoising_x1t_comparison.png"))
def _create_figure(self, title):
fig, axs = plt.subplots(6, 2, figsize=(24, 12))
fig.suptitle(title, fontsize=16)
for ax in axs[:, 0]:
ax.set_title("No RTC (N/A)" if ax == axs[0, 0] else "", fontsize=12)
for ax in axs[:, 1]:
ax.set_title("RTC" if ax == axs[0, 1] else "", fontsize=12)
return fig, axs
def _save_figure(self, fig, path):
fig.tight_layout()
fig.savefig(path, dpi=150)
logging.info(f"Saved figure to {path}")
plt.close(fig)
def _plot_denoising_steps_from_tracker(self, tracked_steps, xt_axs, vt_axs, corr_axs, x1t_axs, num_steps):
"""Plot denoising steps from tracker data.
Args:
tracked_steps: List of DebugStep objects containing debug steps
xt_axs: Matplotlib axes for x_t plots (array of 6 axes)
vt_axs: Matplotlib axes for v_t plots (array of 6 axes)
corr_axs: Matplotlib axes for correction plots (array of 6 axes)
x1t_axs: Matplotlib axes for x1_t plots (array of 6 axes)
num_steps: Total number of denoising steps for colormap
"""
logging.info("=" * 80)
logging.info(f"Plotting {len(tracked_steps)} steps")
debug_steps = tracked_steps
if not debug_steps:
return
# Define colors for different denoise steps (using a colormap)
colors = plt.cm.viridis(np.linspace(0, 1, num_steps))
for step_idx, debug_step in enumerate(debug_steps):
color = colors[step_idx % len(colors)]
# Plot x_t
if debug_step.x_t is not None:
RTCDebugVisualizer.plot_waypoints(
xt_axs, debug_step.x_t, start_from=0, color=color, label=f"Step {step_idx}"
)
# Plot v_t
if debug_step.v_t is not None:
RTCDebugVisualizer.plot_waypoints(
vt_axs, debug_step.v_t, start_from=0, color=color, label=f"Step {step_idx}"
)
# Plot correction on separate axes
if debug_step.correction is not None:
RTCDebugVisualizer.plot_waypoints(
corr_axs,
debug_step.correction,
start_from=0,
color=color,
label=f"Step {step_idx}",
)
# Plot x1_t (predicted state)
if x1t_axs is not None and debug_step.x1_t is not None:
RTCDebugVisualizer.plot_waypoints(
x1t_axs,
debug_step.x1_t,
start_from=0,
color=color,
label=f"x1_t Step {step_idx}",
)
# Plot error in orange dashed
if x1t_axs is not None and debug_step.err is not None:
error_chunk = (
debug_step.err[0].cpu().numpy()
if len(debug_step.err.shape) == 3
else debug_step.err.cpu().numpy()
)
num_dims = min(error_chunk.shape[-1], 6)
for j in range(num_dims):
x1t_axs[j].plot(
np.arange(0, error_chunk.shape[0]),
error_chunk[:, j],
color="orange",
linestyle="--",
alpha=0.7,
label=f"error Step {step_idx}",
)
# Recalculate axis limits after plotting to ensure proper scaling
self._rescale_axes(xt_axs)
self._rescale_axes(vt_axs)
self._rescale_axes(corr_axs)
self._rescale_axes(x1t_axs)
def _rescale_axes(self, axes):
"""Rescale axes to show all data with proper margins.
Args:
axes: Array of matplotlib axes to rescale
"""
for ax in axes:
ax.relim()
ax.autoscale_view()
# Add 10% margin to y-axis for better visualization
ylim = ax.get_ylim()
y_range = ylim[1] - ylim[0]
if y_range > 0: # Avoid division by zero
margin = y_range * 0.1
ax.set_ylim(ylim[0] - margin, ylim[1] + margin)
@parser.wrap()
def main(cfg: RTCEvalConfig):
"""Main entry point for RTC evaluation."""
# Set random seed for reproducibility
set_seed(cfg.seed)
init_logging()
logging.info("=" * 80)
logging.info("RTC Dataset Evaluation")
logging.info(f"Config: {cfg}")
logging.info("=" * 80)
evaluator = RTCEvaluator(cfg)
evaluator.run_evaluation()
if __name__ == "__main__":
main()