LLM Finetuning with HPO¶
To build on the LLM reasoning tutorial, we will now introduce how you can perform hyperparameter optimisation (HPO) on GRPO whilst finetuning an LLM, leading to superior reasoning performance with smaller model sizes. Using our evolutionary approach, as referenced in the Evolutionary Hyperparameter Optimization section, we can select GRPO hyperparameters to maximise the performance of the LLM finetuning process.
Note
Population-based LLM training with GRPO is computationally intensive by nature and at larger population sizes, wall-clock time becomes the bottleneck fast. This tutorial is intentionally self-contained and runs agents sequentially, so expect it to be slow if you’re scaling up.
Parallelising this efficiently at scale is a hard infrastructure problem, and it’s one we’ve spent a lot of time on. AgileRL Arena handles the scheduling, parallelism, and resource management so you don’t have to. If you’re planning to run serious experiments, it’s worth taking a look.
Dependencies¶
import re
import torch
import yaml
from accelerate import Accelerator
from datasets import load_dataset
from peft import LoraConfig, get_peft_model
from torch.utils.data import Dataset
from transformers import AutoModelForCausalLM, AutoTokenizer
from agilerl.algorithms.core.registry import HyperparameterConfig, RLParameter
from agilerl.hpo.mutation import Mutations
from agilerl.hpo.tournament import TournamentSelection
from agilerl.training.train_llm import finetune_llm_reasoning
from agilerl.llm_envs import ReasoningGym
from agilerl.utils.utils import create_population
Defining Hyperparameters¶
Before we commence training, it’s easiest to define all of our hyperparameters in one dictionary. Below is an example of such for the GRPO algorithm. Additionally, we also define a mutations parameters dictionary, in which we determine what mutations we want to happen, to what extent we want these mutations to occur, and what RL hyperparameters we want to tune. Additionally, we also define our upper and lower limits for these hyperparameters to define search spaces. It is worth noting, unlike the rest of the AgileRL framework, we can only tune the RL hyperparameters and not architecture hyperparameters.
Hyperparameter Config
MUTATION_PARAMS = {
"NO_MUT": 0.1,
"RL_HP_MUT": 0.6,
"MUT_SD": 0.1,
"RAND_SEED": 42,
"MIN_LR": 0.0000001,
"MAX_LR": 0.00001,
"MIN_BETA": 0.0001,
"MAX_BETA": 0.01,
"MIN_GROUP_SIZE": 4,
"MAX_GROUP_SIZE": 12,
}
INIT_HP = {
"ALGO": "GRPO",
"BATCH_SIZE": 16,
"BETA": 0.001,
"LR": 0.000005,
"CLIP_COEF": 0.2,
"MAX_GRAD_NORM": 0.1,
"UPDATE_EPOCHS": 1,
"GROUP_SIZE": 8,
"TEMPERATURE": 0.9,
"MAX_MODEL_LEN": 1024,
"TOURN_SIZE": 2,
"ELITISM": True,
"POP_SIZE": 4,
"EVAL_LOOP": 1,
}
Defining our Base Model and Dataset¶
In this tutorial, we use the open-source transformers and datasets libraries from Hugging Face to download our pretrained model weights and training data. There are a huge number of models and datasets hosted on Hugging Face, and different ones can easily be substituted in. In this tutorial, to keep things simple, we will use a 1.5 billion parameter Qwen model, and the Countdown dataset:
Model and Dataset Initialisation
MODEL_PATH = "Qwen/Qwen2.5-1.5B"
DATASET = "Jiayi-Pan/Countdown-Tasks-3to4"
def make_dataset(dataset_name: str) -> tuple[Dataset, Dataset]:
raw_dataset = (
load_dataset(dataset_name, split="train").shuffle(seed=42).select(range(50000))
)
raw_dataset = raw_dataset.rename_column("target", "answer")
raw_dataset = raw_dataset.rename_column("nums", "question")
train_test_split = raw_dataset.train_test_split(test_size=0.1)
train_dataset = train_test_split["train"]
test_dataset = train_test_split["test"]
return train_dataset, test_dataset
# Instantiate the model and the associated tokenizer
model = create_model(pretrained_model_name_or_path=MODEL_PATH)
tokenizer = AutoTokenizer.from_pretrained(MODEL_PATH)
tokenizer.pad_token_id = tokenizer.eos_token_id
train_dataset, test_dataset = make_dataset(DATASET)
Create the Reasoning Environment¶
From model to agent: In reinforcement learning, models are called agents. This is because they are trained by taking actions, receiving rewards, and learning from this feedback. This enables them to become very good at taking actions to solve tasks - to develop agency. Since we are training our model with reinforcement learning, it becomes an agent through this process.
We must create a reinforcement learning environment in which our agent can explore possible
solutions and learn to optimise rewards. AgileRL provides a ReasoningGym
class that wraps a Hugging Face dataset and converts it into a reinforcement learning, gymnasium-style environment.
So, how does the environment know how to reward an agent for its outputs? Well, we must define a reward_function that the agent learns to optimise. Following the techniques used in the DeepSeek reasoning paper, we will define our reward function as the sum of two rewards:
Accuracy rewards: Verifying answers against ground truth. In this tutorial, we will reward the model +1 if the final answer it produces is correct, otherwise 0.
Format rewards: Encouraging structured reasoning with explicit steps. In this tutorial, we will reward the model +1 if it puts its thinking process between ‘<think>’ and ‘</think>’ tags, otherwise 0.
Therefore, the maximum score an agent can receive is 2, if it produces the correct answer in the correct format. The key here is that we never tell the agent which answer it should produce or which format it should use. By giving it rewards for displaying these behaviours, the agent itself discovers the best way to achieve high rewards and learns the behaviour we desire.
Reward Functions
def format_reward_func(completions, target, **kwargs):
rewards = []
for completion, gt in zip(completions, target):
try:
# add synthetic <think> as its already part of the prompt and prefilled for the assistant to more easily match the regex
completion = "<think>" + completion
regex = r"^<think>([^<]*(?:<(?!/?think>)[^<]*)*)<\/think>\n<answer>([\s\S]*?)<\/answer>$"
match = re.search(regex, completion, re.DOTALL)
if match is None or len(match.groups()) != 2:
rewards.append(0.0)
else:
rewards.append(1.0)
except Exception:
rewards.append(0.0)
return rewards
def equation_reward_func(completions, target, nums, **kwargs):
rewards = []
for completion, gt, numbers in zip(completions, target, nums):
try:
# add synthetic <think> as its already part of the prompt and prefilled for the assistant to more easily match the regex
completion = "<think>" + completion
answer_tags = re.findall(r"<answer>([\s\S]*?)<\/answer>", completion)
if len(answer_tags) != 1:
rewards.append(0.0)
continue
equation = answer_tags[0].strip()
used_numbers = [int(n) for n in re.findall(r"\d+", equation)]
if sorted(used_numbers) != sorted(numbers.flatten().tolist()):
rewards.append(0.0)
continue
allowed_pattern = r"^[\d+\-*/().\s]+$"
if not re.match(allowed_pattern, equation):
rewards.append(0.0)
continue
result = eval(equation, {"__builtins__": None}, {})
if abs(float(result) - float(gt)) < 1e-5:
rewards.append(1.0)
else:
rewards.append(0.0)
except Exception:
rewards.append(0.0)
return rewards
def combined_rewards(completion, solution, prompt):
reward = (
equation_reward_func([completion], [solution], [prompt])[0]
+ format_reward_func([completion], [solution])[0]
)
return reward
Now we have defined our reward functions, we must also design our prompt. This forms the input given
to the agent and provides the context necessary to complete the task. This is a task-specific feature,
and different reasoning problems will require different conversation templates, although they can follow a similar
format. We define the conversation template as follows (using question and answer as placeholders for the question and answer data)
and then instantiate the ReasoningGym object which converts a Hugging Face dataset into a Gymnasium-style environment.
Convert HuggingFace Dataset to Gymnasium Environment
conversation = [
{
"role": "system",
"content": "You are a helpful assistant. You first think about the reasoning process in your mind and then provide the user with the answer.",
},
{
"role": "user",
"content": "Using each number in this list only once {question}, create an equation that equals {answer}. You can use basic arithmetic operations (+, -, *, /) and each number can only be used once. Show your work in <think> </think> tags. And return the final equation and answer in <answer> </answer> tags, for example <answer>(1 + 2) / 3</answer>.",
},
{"role": "assistant", "content": "Let me solve this step by step.\n<think>"},
]
# Define accelerators for distributed training
accelerator = Accelerator()
# Convert the HuggingFace dataset into a Gymnasium environment
env = ReasoningGym(
train_dataset=train_dataset,
test_dataset=test_dataset,
tokenizer=tokenizer,
reward_fn=combined_rewards,
conversation_template=conversation_template,
data_batch_size_per_gpu=10,
accelerator=accelerator,
return_raw_completions=True, # This is necessary for vLLM to work
)
Create a population of GRPO Agents¶
To allow our model to become an agent and learn through reinforcement learning, we can use the
GRPO class. This class follows the same structure as the other
reinforcement learning algorithms in the AgileRL library. We also define a initialisation dictionaries
for the GRPO hyperparameters and the mutation parameters.
An important part of training an LLM to display reasoning behavaiour is distributed training. They are called Large Language Models for a reason, and are often too large to train on a single GPU. If you want to train a larger, more powerful model, then this becomes even more infeasible. Instead, we can leverage distributed training, to share the workload across multiple devices and speed up training. To enable distributed training in this tutorial, we use deepspeed and accelerate.
hp_config = HyperparameterConfig(
beta=RLParameter(min=mut_p["MIN_BETA"], max=mut_p["MAX_BETA"]),
lr=RLParameter(min=mut_p["MIN_LR"], max=mut_p["MAX_LR"]),
group_size=RLParameter(min=mut_p["MIN_GROUP_SIZE"], max=mut_p["MAX_GROUP_SIZE"], dtype=int),
)
# Define the algorithm kwargs
algo_kwargs = {
"model_name": MODEL_PATH,
"lora_config": LoraConfig(
r=16,
lora_alpha=64,
target_modules=["q_proj", "k_proj", "v_proj", "o_proj"],
lora_dropout=0.05,
bias="none",
),
"use_vllm": True,
"vllm_config": VLLMConfig(
sleep_mode=False,
max_num_seqs=4
),
"pad_token_id": tokenizer.pad_token_id,
"pad_token": tokenizer.pad_token,
}
pop = create_population(
algo=init_hp["ALGO"],
net_config=None,
INIT_HP=init_hp,
hp_config=hp_config,
population_size=init_hp["POP_SIZE"],
accelerator=accelerator,
algo_kwargs=algo_kwargs,
)
Creating Mutations and Tournament Objects¶
Tournament selection is used to select the agents from a population which will make up the next generation of agents. If elitism is used, the best agent from a population is automatically preserved and becomes a member of the next generation. Then, for each tournament, k individuals are randomly chosen, and the agent with the best evaluation fitness is preserved. This is repeated until the population for the next generation is full.
The class TournamentSelection() defines the functions required for tournament selection. TournamentSelection.select()
returns the best agent, and the new generation of agents.
tournament = TournamentSelection(
INIT_HP["TOURN_SIZE"],
INIT_HP["ELITISM"],
INIT_HP["POP_SIZE"],
INIT_HP["EVAL_LOOP"],
)
Mutation is periodically used to explore the hyperparameter space, allowing different hyperparameter combinations to be trialled during training. If certain hyperparameters prove relatively beneficial to training, then that agent is more likely to be preserved in the next generation, and so those characteristics are more likely to remain in the population.
The Mutations() class is used to mutate agents with pre-set probabilities. The available mutations for GRPO currently implemented are:
No mutation
RL algorithm mutation - mutation of learning hyperparameter, such as learning rate or batch size.
Mutations.mutation() returns a mutated population. Tournament selection and mutation should be applied sequentially to fully evolve a population between evaluation and learning cycles.
mutations = Mutations(
no_mutation=MUT_P["NO_MUT"],
architecture=0,
new_layer_prob=0,
parameters=0,
activation=0,
rl_hp=MUT_P["RL_HP_MUT"],
mutation_sd=MUT_P["MUT_SD"],
rand_seed=MUT_P["RAND_SEED"],
device=device,
)
Training and Saving an Agent¶
The simplest way to train an AgileRL agent is to use the finetune_llm_reasoning() function.
finetune_llm_reasoning(
pop=pop,
env=env,
init_hp=init_hp,
evaluation_interval=10,
wb=True,
save_elite=True,
elite_path="path/to/model/directory",
max_reward=2.0,
evo_steps=10,
mutation=mutations,
tournament=tournament,
accelerator=accelerator,
verbose=True,
num_epochs=1
)
Configuring Accelerate and DeepSpeed¶
To generate an accelerate file, run the command accelerate config in your terminal, following the instructions
on screen to outline the details of the compute you intend to use for your finetuning, saying yes to the question
“Do you want to use DeepSpeed?” and no to the question “Do you want to specify a json file to a DeepSpeed config?”
if you want an auto-generated deepspeed config file. More information on the deepspeed configuration can be found
in their docs. The accelerate config will handle the details of
the distribution and the GRPO class handles how the accelerator is used during training. You can then launch a training
run using accelerate with the following command:
accelerate launch path/to/training_script
Alternatively, you can avoid accelerate config by defining your own accelerate-deepspeed config file and pass
it as an argument to accelerate launch:
accelerate launch --config_file path/to/accelerate-deepspeed-config.yaml path/to/training_script
Example config file:
compute_environment: LOCAL_MACHINE
debug: false
deepspeed_config:
gradient_accumulation_steps: 2
gradient_clipping: 1.0
offload_optimizer_device: cpu
offload_param_device: cpu
zero3_init_flag: false
zero_stage: 2
distributed_type: DEEPSPEED
downcast_bf16: no
enable_cpu_affinity: false
machine_rank: 0
main_training_function: main
mixed_precision: bf16
num_machines: 4
num_processes: 1
rdzv_backend: static
same_network: true
tpu_env: []
tpu_use_cluster: false
tpu_use_sudo: false
use_cpu: false
Using a Custom Training Loop¶
If we wanted to have more control over the training process, it is also possible to write our own custom
training loops to train our agents. The training loop below can be used alternatively to the above finetune_llm_reasoning
function and is an example of how we might choose to make use of a population of AgileRL agents in our own training loop.
Custom Training Loop
from agilerl.utils.utils import aggregate_metrics_across_gpus
from agilerl.training.train_llm import tournament_selection_and_mutation
from tqdm import trange
import numpy as np
import torch
from accelerate import Accelerator
accelerator = Accelerator()
if accelerator is None or accelerator.is_main_process:
print("\nTraining...")
bar_format = "{l_bar}{bar:10}| {n:4}/{total_fmt} [{elapsed:>7}<{remaining:>7}, {rate_fmt}{postfix}]"
max_steps = len(env) // effective_data_batch_size
pbar = trange(
max_steps,
unit="step",
bar_format=bar_format,
ascii=True,
dynamic_ncols=True,
)
total_steps = 0
# calling env.reset() supplies the first batch of training data
prompts = env.reset(reset_dataloaders=True)
for i in range(max_steps):
agent_metrics_dict = {}
for agent_idx, agent in enumerate(pop):
completion_ids, action_masks = agent.get_action(prompts)
completion_lengths = np.mean([x.shape[1] for x in completion_ids])
# Use the reward function stored in env.step to calculate reward of the each answer from the group
next_prompts, rewards = env.step(completion_ids)
experiences = (
completion_ids,
action_masks,
rewards,
)
loss, kl = agent.learn(experiences)
metrics = [loss, kl, rewards, completion_lengths]
if max_reward is not None:
accuracy = (rewards == max_reward).sum() / len(rewards.flatten())
metrics.append(accuracy)
agg_metrics = [
aggregate_metrics_across_gpus(accelerator, metric) for metric in metrics
]
prompts = next_prompts
agg_test_metrics = None
if (i + 1) % evaluation_interval == 0:
test_reward = agent.test(env)
test_metrics = [test_reward]
if max_reward is not None:
test_accuracy = (test_reward == max_reward).sum() / len(
rewards.flatten()
)
test_metrics.append(test_accuracy)
agg_test_metrics = [
aggregate_metrics_across_gpus(accelerator, metric)
for metric in test_metrics
]
if verbose and (accelerator is None or accelerator.is_main_process):
fitness = [str(round(agent.fitness[-1], 2)) for agent in pop]
avg_fitness = [
"%.2f" % np.mean(agent.fitness[-5:]) for agent in pop
]
avg_score = ["%.2f" % np.mean(agent.scores[-10:]) for agent in pop]
agents = [agent.index for agent in pop]
num_steps = [agent.steps[-1] for agent in pop]
muts = [agent.mut for agent in pop]
print(
f"""
--- Global Steps {total_steps} ---
Fitness:\t\t{fitness}
Score:\t\t{mean_scores}
5 fitness avgs:\t{avg_fitness}
10 score avgs:\t{avg_score}
Agents:\t\t{agents}
Steps:\t\t{num_steps}
Mutations:\t\t{muts}
""",
end="\r",
)
if accelerator is None or accelerator.is_main_process:
metrics_dict = {
"Train/Loss": agg_metrics[0],
"Train/KL-divergence": agg_metrics[1],
"Train/Mean reward": (mean_scores := agg_metrics[2]),
"Train/Average completion length": int(agg_metrics[3]),
}
if max_reward is not None:
metrics_dict |= {"Train/Accuracy": agg_metrics[4]}
agent_metrics_dict[f"agent_{agent_idx}/train_metrics"] = metrics_dict
if agg_test_metrics is not None:
test_metrics_dict = {"Eval/Mean reward": agg_test_metrics[0]}
if max_reward is not None:
test_metrics_dict |= {"Eval/Accuracy": agg_test_metrics[1]}
agent_metrics_dict[f"agent_{agent_idx}/test_metrics"] = (
test_metrics_dict
)
pbar.update(effective_data_batch_size)
agent.steps.append(effective_data_batch_size)
agent.scores.append(mean_scores)
total_steps += effective_data_batch_size
if accelerator is not None:
accelerator.wait_for_everyone()
if tournament and mutation is not None:
if (i + 1) % evo_steps == 0:
pop = tournament_selection_and_mutation(
population=pop,
tournament=tournament,
mutation=mutations,
env_name=env.name,
accelerator=None, # Set as None for LLM finetuning as it does not require the same accelerator handling as standard RL models
language_model=True,
elite_path=elite_path,
save_elite=save_elite
)
pbar.close()
Loading a Trained Agent for Inference¶
Once we have finetuned our LLM, we may want to use it for inference. Below outlines how to load the model in this tutorial, this forum provides more info for loading finetuned models.
Load fine-tuned LLM into vLLM Engine for inference¶
from vllm import LLM
llm = LLM(
model=MODEL_PATH,
tensor_parallel_size=1,
gpu_memory_utilization=0.9,
max_num_seqs=1024,
max_model_len=1536,
distributed_executor_backend="external_launcher",
seed=0,
model_impl="vllm",
enable_lora=True,
)
sampling_params = SamplingParams(
temperature=0.0,
top_p=1.0,
top_k=-1,
max_tokens=1024,
seed=42,
)
prompts = "Using each number in this list only once 33, 19, 27, 5, create an equation that equals 82. You can use basic arithmetic operations (+, -, *, /) and each number can only be used once.""
outputs = llm.generate(
prompts,
sampling_params=sampling_params,
lora_request=LoRARequest(
lora_name="trained_model",
lora_int_id=1,
lora_path=checkpoint_path + "/actor",
),
)
Full Training Code¶
Full code
import re
from accelerate import Accelerator
from torch.utils.data import Dataset
from agilerl import HAS_LLM_DEPENDENCIES
from agilerl.algorithms.core.registry import HyperparameterConfig, RLParameter
from agilerl.hpo.mutation import Mutations
from agilerl.hpo.tournament import TournamentSelection
from agilerl.training.train_llm import finetune_llm_reasoning
from agilerl.utils.algo_utils import VLLMConfig
from agilerl.llm_envs import ReasoningGym
from agilerl.utils.utils import create_population
if HAS_LLM_DEPENDENCIES:
from datasets import load_dataset
from peft import LoraConfig
from transformers import AutoTokenizer
else:
msg = "LLM dependencies are not installed. Please install them using `pip install agilerl[llm]`."
raise ImportError(
msg,
)
MODEL_PATH = "Qwen/Qwen2.5-0.5B"
DATASET = "Jiayi-Pan/Countdown-Tasks-3to4"
USE_VLLM = True
def make_dataset(dataset_name: str) -> tuple[Dataset, Dataset]:
raw_dataset = (
load_dataset(dataset_name, split="train").shuffle(seed=42).select(range(50000))
)
raw_dataset = raw_dataset.rename_column("target", "answer")
raw_dataset = raw_dataset.rename_column("nums", "question")
train_test_split = raw_dataset.train_test_split(test_size=0.2)
train_dataset = train_test_split["train"]
test_dataset = train_test_split["test"]
return train_dataset, test_dataset
def format_reward_func(completions, target, **kwargs):
rewards = []
for completion, _gt in zip(completions, target, strict=False):
try:
# add synthetic <think> as its already part of the prompt and prefilled for the assistant to more easily match the regex
completion = "<think>" + completion
regex = r"^<think>([^<]*(?:<(?!/?think>)[^<]*)*)<\/think>\n<answer>([\s\S]*?)<\/answer>$"
match = re.search(regex, completion, re.DOTALL)
if match is None or len(match.groups()) != 2:
rewards.append(0.0)
else:
rewards.append(1.0)
except Exception: # noqa: PERF203
rewards.append(0.0)
return rewards
def equation_reward_func(completions, target, nums, **kwargs):
rewards = []
for completion, gt, numbers in zip(completions, target, nums, strict=False):
try:
# add synthetic <think> as its already part of the prompt and prefilled for the assistant to more easily match the regex
completion = "<think>" + completion
answer_tags = re.findall(r"<answer>([\s\S]*?)<\/answer>", completion)
if len(answer_tags) != 1:
rewards.append(0.0)
continue
equation = answer_tags[0].strip()
used_numbers = [int(n) for n in re.findall(r"\d+", equation)]
if sorted(used_numbers) != sorted(numbers.flatten().tolist()):
rewards.append(0.0)
continue
allowed_pattern = r"^[\d+\-*/().\s]+$"
if not re.match(allowed_pattern, equation):
rewards.append(0.0)
continue
result = eval(equation, {"__builtins__": None}, {})
if abs(float(result) - float(gt)) < 1e-5:
rewards.append(1.0)
else:
rewards.append(0.0)
except Exception:
rewards.append(0.0)
return rewards
def combined_rewards(completion, solution, prompt):
return (
equation_reward_func([completion], [solution], [prompt])[0]
+ format_reward_func([completion], [solution])[0]
)
def main(init_hp, mut_p):
# Instantiate the model and the associated tokenizer
tokenizer = AutoTokenizer.from_pretrained(MODEL_PATH)
tokenizer.pad_token = tokenizer.eos_token
train_dataset, test_dataset = make_dataset(DATASET)
# Convert the HuggingFace dataset into a Gymnasium environment
accelerator = Accelerator()
# Define the conversation template
conversation_template = [
{
"role": "system",
"content": "You are a helpful assistant. You first think about the reasoning process in your mind and then provide the user with the answer.",
},
{
"role": "user",
"content": "Using each number in this tensor only once {question}, create an equation that equals {answer}. You can use basic arithmetic operations (+, -, *, /) and each number can only be used once. Show your work in <think> </think> tags. And return the final equation and answer in <answer> </answer> tags, for example <answer>(1 + 2) / 3</answer>.",
},
{"role": "assistant", "content": "Let me solve this step by step.\n<think>"},
]
env = ReasoningGym(
train_dataset=train_dataset,
test_dataset=test_dataset,
tokenizer=tokenizer,
reward_fn=combined_rewards,
conversation_template=conversation_template,
data_batch_size_per_gpu=10,
accelerator=accelerator,
return_raw_completions=USE_VLLM,
max_context_length=init_hp["MAX_MODEL_LEN"],
)
hp_config = HyperparameterConfig(
beta=RLParameter(min=mut_p["MIN_BETA"], max=mut_p["MAX_BETA"]),
lr=RLParameter(min=mut_p["MIN_LR"], max=mut_p["MAX_LR"]),
group_size=RLParameter(
min=mut_p["MIN_GROUP_SIZE"],
max=mut_p["MAX_GROUP_SIZE"],
dtype=int,
),
)
# Define the algorithm kwargs
algo_kwargs = {
"model_name": MODEL_PATH,
"lora_config": LoraConfig(
r=16,
lora_alpha=64,
target_modules=["q_proj", "k_proj", "v_proj", "o_proj"],
lora_dropout=0.05,
bias="none",
),
"use_vllm": USE_VLLM,
"vllm_config": VLLMConfig(sleep_mode=False, max_num_seqs=4),
"pad_token_id": tokenizer.pad_token_id,
"pad_token": tokenizer.pad_token,
}
pop = create_population(
algo=init_hp["ALGO"],
net_config=None,
INIT_HP=init_hp,
hp_config=hp_config,
population_size=init_hp["POP_SIZE"],
accelerator=accelerator,
algo_kwargs=algo_kwargs,
)
tournament = TournamentSelection(
init_hp["TOURN_SIZE"],
init_hp["ELITISM"],
init_hp["POP_SIZE"],
init_hp["EVAL_LOOP"],
)
mutations = Mutations(
no_mutation=mut_p["NO_MUT"],
architecture=0,
new_layer_prob=0,
parameters=0,
activation=0,
rl_hp=mut_p["RL_HP_MUT"],
mutation_sd=mut_p["MUT_SD"],
rand_seed=mut_p["RAND_SEED"],
accelerator=accelerator,
)
finetune_llm_reasoning(
pop=pop,
env=env,
init_hp=init_hp,
evaluation_interval=10,
wb=True,
save_elite=True,
elite_path="saved_llms",
max_reward=2.0,
evo_steps=10,
mutation=mutations,
tournament=tournament,
accelerator=accelerator,
verbose=True,
num_epochs=1,
)
accelerator.end_training()
if __name__ == "__main__":
import os
os.environ["PYTORCH_CUDA_ALLOC_CONF"] = "expandable_segments:True"
MUTATION_PARAMS = {
"NO_MUT": 0.1,
"RL_HP_MUT": 0.6,
"MUT_SD": 0.1,
"RAND_SEED": 42,
"MIN_LR": 0.0000001,
"MAX_LR": 0.00001,
"MIN_BETA": 0.0001,
"MAX_BETA": 0.01,
"MIN_GROUP_SIZE": 4,
"MAX_GROUP_SIZE": 12,
}
INIT_HP = {
"ALGO": "GRPO",
"BATCH_SIZE": 16,
"BETA": 0.001,
"LR": 0.000005,
"CLIP_COEF": 0.2,
"MAX_GRAD_NORM": 0.1,
"UPDATE_EPOCHS": 1,
"GROUP_SIZE": 8,
"TEMPERATURE": 0.9,
"MAX_MODEL_LEN": 1024,
"TOURN_SIZE": 2,
"ELITISM": True,
"POP_SIZE": 4,
"EVAL_LOOP": 1,
}
main(INIT_HP, MUTATION_PARAMS)